Abstract:
A modular system for constructing a variety of self-contained analytical cartridges enabled to perform a number of symmetrical or asymmetrical tests on a single sample source within a single device. Said cartridges are embodied as a readily reversible assemblage of two or more modules that are, in turn, operable to perform one or more tasks of an analytical test as discrete articles-of-manufacture. A programmable reagent delivery system comprising one or more serialized reagent clusters having one or more wet cells (individually packaged reagents) and zero or more dry cells (calibrated spacers); wherein, said wet cells are arranged in a linear series corresponding to prescribed temporal release sequence and dry cells are interpositioned between wet cells in a manner that enables two or more test protocols having asymmetrical release sequences to be synchronized such that a single mechanism can actuate more than one test protocol simultaneously.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    Not Applicable 
       STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
       [0002]    Not Applicable 
       THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT 
       [0003]    Not Applicable 
       REFERENCE TO A SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTING COMPACT DISK APPENDIX 
       [0004]    Not Applicable 
       BACKGROUND OF THE INVENTION 
       [0005]    1. Field of the Invention 
         [0006]    The field of the current invention relates to self-contained single-use fluidically-operated analytical devices considered to be portable and operable to perform one or more analytical test requiring a liquid or semi-solid environment. Applications related to the present invention are realized fields employing analytical testing such as environmental testing, food safety, national defense, research tools, drug development, and medical diagnostics. 
         [0007]    2. Description of Related Art 
         [0008]    A microfluidic device is a solid-state mixing device enabled by a fixed-configuration continuous-flow fluid control network physically disposed within an appropriate substrate. This fluid control network enables the mixing of small volumes of analytical material in a controlled manner without external user assistance and by doing so possesses the potential to enable the automation of many complex analytical procedures. A broad spectrum of microfluidic devices exist ranging from simple mixing manifolds to fully integrated self-contained analytical systems. Each type of device varies in the degree of its self-containment, the quantity and types of test it can perform, its fluid management, and its method of manufacture. The subject of the present invention pertains most closely to fully integrated analytical systems embodied as portable self-contained fluidically controlled cartridges operable to facilitate one or more quantitative or qualitative analytical tests within a liquid or semi-solid environment. 
         [0009]    To meet the requirements of portability and self-containment these devices must be easily transportable and operable in the field at the point of sample collection. These devices must also be enabled to store, dispense, and facilitate the controlled mixing of one or more analytical materials without external assistance and retain the collective volumes of spent solutions used during the course of the analytical test. Such devices are generally manufactured as singularly-indivisible holistically self-contained articles of manufacture fabricated by advanced lithography techniques or laminating progressive stencil layers to form the requisite fluid control structures of a fluid control network. These structures are then loaded with the requisite analytical materials needed to carry out a test, and then the device is sealed to form a closed system. With a few exceptions this is a contiguous manufacturing process that generates a device having inseparable constituent parts. Such devices are generally operated by establishing a pressure gradient force within the device that induces the movement of fluid through the device from regions of elevated pressure to regions of lower pressure. An operable pressure gradient force can be generated directly by pneumatic, hydraulic, or peristaltic pumps which add a gas or immiscible liquid to one or more inlets while subtracting a proportional amount from an outlet or, by the elevation in pressure generated by releasing materials from blister packaging integrated into the fluid control network. Such a force can also be generated by indirect means through the use of plunger systems, squeeze blubs, and centrifuges; and, it is also possible to exploit the electrochemomotive properties of charged molecules within an electrical field. These devices generally control the mixing of fluids by simultaneously releasing multiple fluids along individually calibrated paths that vary in length and diameter; and/or, by releasing each fluid in a temporal sequence by selectively establishing an operable motive force at one or more fluid reservoirs strategically positioned about the device. Briefly, different analytical reagents exhibit different flow and mixing rates and weak forces such as capillary action and surface tension, generally overlooked in large volumes, become dominate forces in the fluid dynamics of small volumes. Likewise, different tests require different types and volumes of reagents administered in differing temporal sequences. The act of designing an operable fluid control network to store, mix ,and retain the collective volumes of materials in a temporally controlled manner typically renders a highly specialized device specific for a given test; meaning, a new device is required for each test or combination of tests. 
         [0010]    How a device configures its fluid control pathways and the mode of operation it employs determines the number and types of test it can perform. Devices configured to perform more than one test can be classified either as a homogenous or heterogeneous testing platforms; and, the difference between, and within, these two classes can lead to some confusion depending on whether “a test” is referred to by its sample source, the variable it is measuring or, both. For purposes of clarity, “a test”, “multiple tests”, or “one or more test” as may be used herein, is intended to be interchangeable with “one or more of a type of test”. A homogenous testing platform can perform multiple tests in at least one of two ways; it can hold the test protocol constant and vary the sample being tested or it can hold the sample constant and vary a type of reagent used in the test protocol without altering its volume or sequence of administration. In the first example a number of sample sources are tested for the same compound and, in the second example a single sample source is tested for multiple compounds. Regardless how you define “a test”, in both examples, the volumes and temporal sequence of administering each fluid is held constant which allows one fluid control network to be calibrated for the type of test and then symmetrical replicated for the number of tests desired which enables all test to be actuated simultaneously in a uniform fashion. Due to the symmetry of the system, the means (ports, electrodes, plungers, etc) that actuate the motive force to move these fluids can be placed predictably about various iterations of the device while also conserving the overall dimension of the device. This in turn, enables multiple devices to be operated by a common analytical instrument and, doing so, has a high commercial value. The term “analytical instrument”, as used herein, is intended to generically refer to a second instrument specially enabled to operate and analyze data acquired from the device. Heterogeneous testing platforms, on the other hand, integrate different types of tests involving different types, volumes, and temporal release sequence of reagents. While these testing platforms derive greater commercial value from the diversity of test they can perform on a single sample source, due to their asymmetry they are easily orders of magnitudes more difficult to design and operate compared to homogenous testing platforms. While some simultaneously actuated heterogeneous testing platforms exist, their commercial utility is generally limited to a small number of tests. Heterogeneous testing platforms that perform a commercially relevant number of tests generally require differentially configured fluid control networks actuated independently of each other. This generally precludes the predictable placement of means (ports, electrodes, plungers, etc.) to actuate the motive force needed to move fluids within the system. This in turn, leads to the need for different analytical instruments or the use of complex adaptors to operate these systems, neither of which is commercially favorable. 
         [0011]    In addition to being difficult to design and operate, being singularly-indivisible and holistically self-contained, most of these devices have poor fault tolerances and are difficult to manufacture. For example, the shelf-life of a device possessing numerous analytical reagents would be defined by those reagents with the shortest life expectancy. From a production standpoint, it would be favorable to maximize the operational life-expectancy of each device by strategically pairing the tests on any single device to ones with compatible shelf-lives and storage conditions. Doing so diversifies the number of devices needed to perform the equivalent number of tests which limits the full utility of such a device. As a device that is inseparable into constituent parts the individual elements of the device cannot be individually fault-tested which, when coupled to a contiguous manufacturing process, results in an incrementing risk profile as the device is assembled which increases the cost of sacrificing the entire device if any single element fails to conform to specification. Likewise, without the ability to interchange defective components, entire production lots are placed at risk when an analytical reagent, sensor, or other material reaches its life-expectancy or, is found to expire prematurely or malfunction post-manufacture. 
         [0012]    As previously mentioned, it is commercially favorable to perform as many types of tests as possible from a single sample source and employ different iterations of devices to diversify the testing capability of the system employing a common analytical instrument. In order to do so, each device iteration must have both a conserved mechanism-of-operation and overall dimension so as to operably interface with a common analytical instrument. This means that, depending on the circumstances of the tests, the fluid control network must be scaled up or down to accommodate the total reaction volumes of the aggregate number of tests being performed and as more tests are integrated into the system the total reactant volumes per test must be scaled-down in order to free-up physical space. While the physical layout of the fluid control network is largely a design issue that is self-limiting; the total reactant volume of a test, the sample volume in-particular, can only be decrease so much before it ceases to meaningfully represent the larger system. Therefore, in circumstances where low abundance targets are present in dilute environments, as is the case in most bioanalytics, an adequate sample size must be tested meaning. Thus, fluid control systems must be scaled-up to handle larger reactant volumes which limits the total number of tests the device can perform. This again, is commercially unfavorable. It would therefore be commercially favorable to reduce the physical foot-print by simplifying the fluid control network needed to perform a given tests. 
         [0013]    While not an exhaustive list, a commercially viable microfluidic cartridge design should be able to perform multiple types of tests on an adequate sample size with precision, sensitivity and reproducibility. The fluid control network should be simplified and standardized in order to be adaptable to new test and test combinations without significant retooling. The mode of operation and overall device dimension should be such that enables multiple devices to be operated by a single analytical instrument, and the device should be easy to manufacture at commercial scales and provide improved fault testing and fault tolerances. 
       SUMMARY OF THE INVENTION 
       [0014]    The subject of the present invention pertains to the use of a modular system to create a plurality of possible analytical cartridges, a method to create a modular analytical cartridge derived from a common continuous-flow fluid control network, a plurality of possible module types that can be rendered operable to perform one or more steps of an analytical task, a plurality of possible modular assemblages operable to perform an analytical task as a self-contained device, the use of individually packaged reagents in an analytical cartridge, the use of a serialized reagent cluster in an analytical cartridge, a method of programming the release sequence of a dispensable material to an analytical task, and a method to temporally synchronize the release sequences of a variety of dispensable materials to two or more analytical tasks. 
         [0015]    Certain aspects of the present invention pertain to various aspects of a fluidically controlled system. Within the context of the present disclosure the terms “fluid control network”, “fluid control structure”, and “fluid control pathway” are used as follows: “Fluid control pathways” refer to structures that define a path enabling the transfer of a fluid material between two structures; “fluid control structure” pertains to various structural elements that comprise a fluid control network; such as, reservoirs, analytical chambers, etc.; “fluid control network” refers to the fluid control system in aggregate comprising and referring to among other things the physical disposition of various fluid control pathways and fluid control structures and may enable the controlled mixing of analytical materials. Similarly, the term “mode-of-operation”, “mechanism-of-operation”, and “method-of-operation” are used as follows: “mode-of-operation” references the type of gradient force employed within various modules or modular assemblages; for example by, centrifugational force, pressure-gradient force, or electrochemomotive force, etc.; “mechanism-of-operation” references the means used to establish a gradient force; for example, linear actuators, centrifuges, pneumatic or peristaltic pumps, or the flow of a electrical current, etc.; and, “method-of-operation” references how the cartridge is operated and generally refers to an automated, a manual, or a combination of an automated and manual process that may be facilitated by a computer assisted device programmed or mechanical configured to automate a predetermined step-wise process, and/or the use of a human hand that may grasp and otherwise operate a device. 
         [0016]    It is realized that many articles can be employed to interconnect different types of modules, control the movement of fluids, and perform various tasks essential to the operation of a cartridge as the circumstances of a specific test dictate. Such articles may be unambiguous configurations of cooperative mechanical attachment, cooperating slide and slide guides, clips, appliqués or other means capable of directing the assembly of specific modules into specific cartridge types; means to receive, store and/or make available fluids by means of cavities, bladders, and/or prepackaged reagent cells; means enabling fluid transfer within and between modules in the form of tubes or channels or other geometric configurations that facilitate the transfer and possibly separation of fluids; means to improve the interrelationship and transfer of fluids between the cooperating fluid transfer pathways of interconnected modules, such as mechanical seals, gaskets, sterile seal barriers, or self healing stoppers; means to improve fluid control, such as switches, tubes, valves, choke points, diverters, piercing devices, shunts, ports, vents, gaskets, compression forms, and/or magnetized or magnetic material; mechanical or chemical means intended to prepare a sample for analysis, such as analytical reagents, membranes, sieves, filters, or features that enable a module to undergo centrifugation; means to assist in the acquisition of data pertaining to an analytical procedure, such as electrical, chemical, and/or light: sensors, meters, filters, photomultipliers, polarizers, or light blocking, reflective, or transparent materials, structures, or appliqués; means that further enable the operation of the device by means of an electrical current generated within or about a module or module assembly, such as electrical circuits, electrically conductive material, or electricity storage devices, such as batteries or capacitors; and, means that allow module to move relative to other modules as set forth by guide paths within or about other modules, such as plungers, select module configurations, linear actuators, slides or other types motion directing or imparting devices. 
         [0017]    One aspect of the present invention provides for a modular system enabled to create a wide variety of analytical cartridges operable to perform one or more analytical test in a liquid or semi-solid environment. Various aspects of this modular system enables a conserved overall dimension and mechanism-of-operation for a number of possible modular assemblages in their final assembled state. This enables a common analytical instrument to operate multiple types of cartridges derived from said system. Other aspects of the modular system provide for functional groupings of fluid control structures to be manufactured as discrete modules enabled to be rendered operable to perform one or more steps of an analytical process as a functionally self-contained unit. This provides for a segmented manufacturing process that can uncouple the production cost of modules requiring specialized facilities, such as clean rooms, from less specialized modules while also improving the scalability of manufacturing various modules at a commercially meaningful scales of production. Other aspects of this system provides for the fault-testing of individual modules independently of the final assembled device form while also providing for improved fault-tolerances of the final assembled device. For example, if a module fails to meet operational specifications at any point prior to the initialization of a test, the module can be readily disconnected from the device and replaced with a functioning module without undue hardship or the need to sacrifice the entire device. Still other aspects of this modular system enable a unique mechanism-of-operation. In certain modular assemblages a module may be positioned internally to another module and made to move relative to that module. While many types of cartridges enabled by this system employ pneumatically driven pressure gradients to induce the movement of fluid within and between modules, certain embodiments that possess this type of modular configuration may also employ mechanical force to leverage the compressive force imparted by the movement of two objects inwardly relative to each other in order to operate additional aspects provided for by the present system. Other aspects of the present modular system provide for means that direct an unambiguous assembly pattern of a number of cooperating modules derived from a common fluid control network into a specific modular assemblage that may also enable the operation of the final assembled device. This may be favorable when employing a modular system that presents a possibility of misassembling a device at one or more locations. Such means may include the specific disposition and interrelation of one or more physical elements of cooperative mechanical attachment between cooperating modules, and/or appliqués, or other visual elements that provide visual indications of proper modular assemblages that may further possess information as to the type of analytical device and its specific operational parameters. Such means may also be divisions of electrical circuits disposed about cooperating modules enabled to close a circuit when properly assembled that may further enable the communication of information pertaining to the operation of a cartridge to an analytical instrument designed to operate the cartridge. Other aspects of the present system are found in the ability to vary the physical dimensions and configurations between of individual modules to meet the requirements of a specific analytical task while conforming to a standard overall dimension and mechanism-of-operation of the finished device form. This provides high adaptability of the present modular system in performing a wide-variety of analytical tasks while relying on a common analytical instrument. 
         [0018]    Another aspect of the present invention provides for a method for creating a modular analytical device operable to perform an analytical test as a closed system. The method describes the steps of selecting of one or more analytical tests to be performed on a sample; designing a continuous-flow fluid control network operable to perform the select analytical tests accounting for, among other things, the requisite fluid control structures operably interconnected by fluid control pathways; dividing the fluid control network into function groupings that are favorable to manufacture as a number of discrete articles of manufacture that possess sufficient cooperative modularity to be reassembled and reconstruct the original fluid control network. The selection of fluid control structures to be included within a functional division may vary depending on the circumstances of each test but it is realized that creating functional division of fluid control structures having a similar function may be favorable from a manufacturing and operational standpoint. For example, a functional division possessing only analytical chambers may be favorable as a distinct article of manufacture if said chambers are made to hold an analytical reagent that must be kept sterile. In this example, a single module could be rendered operable in a sterile environment, sealed and transported to a separate facility where it could be joined with additional modules having other elements needed to perform the analytical test. However, it is realized that different combinations of fluid control structures may be collocated within a single module as is favorable for specific circumstances, such as the inclusion of a waste reservoir in the previously mentioned module embodiment. 
         [0019]    Another aspect of the present invention provides for a number of possible modules that may also be rendered operable to perform one or more steps of an analytical test by the inclusion of requisite analytical material needed to perform said tests. The following selection of possible embodiments is provided to illustrate a variety of aspects of a number of possible module embodiments manifested in a variety of operational contexts. The inclusion or exclusion of possible embodiments is not intended to be limiting in any way but rather provided so as to communicate the broader context of various aspects of select module embodiments. One aspect of these modules may be the inclusion of one or more fluid control structures that has been functionally reduced and individualized from a common fluid control network enabled to perform one or more analytical tasks. The use of the term “functionally reduced” is intended to communicate the consolidation of one or more fluid control structures, their corresponding fluid control pathways, and any other requisite equipment or materials into consolidated functional division of a select fluid control network. Similarly the term “individualized” is intended to communicate that an operable functional division is physically separated from the fluid control network and disposed in an undivided operable state within the context of an individual module. For example, such a fluid control structure may be a type of reservoir enabled to store, dispense, and/or retain an analytical reagent, a sample, or the waste solutions spent during the course of an analytical test. Another example may be a mixing chamber and/or an analytical chamber made to mix various materials in a controlled fashion or serve as a site that enables the collection of information pertaining to the test being performed. Another aspect of a module may possess a functional structure, embodied as a substantially solid structure, a compartment, or a slot made to house module subassemblies that may embody other fluid control structures, electrical storage devices, sensors, or simply serve to conserve the overall dimension and/or mode-of operation of the device. Other examples may include multi-use structures that consolidate two or more functions into a single structure such as a dual mixing/sample reservoir. Many types and configurations of fluid control structures are realized and the inclusion of such structures depends on the circumstances of the test being performed. Each module may also include equipment that enables different types of analytical tasks, such as a flow aperture enabled to perform flow cytometry, electrodes to establish an electrical current enabling electrophoretic separation of electrically charged materials, or ports that enable the addition or subtraction of a gas or liquid from various modules enabling a pressure gradient to be established within and between modules. Other aspects of modules may include mechanical means that may be used to direct a specific assembly pattern between two or more modules that may also function to enable the operation of a module assemblage. Other aspects of these modules may possess one or more elements of cooperative mechanical attachment disposed about the module in coordination with a one or more select cooperating modules. For example, an element of a cooperative mechanical attachment may be the tooth of a tooth and groove clip; wherein, the tooth is positioned on one module and the groove on a cooperating module and the positioning of both components is selective for each module. Another example may be a slide/slide guide assembly; wherein a slide is present on one module and the slide-guide on a cooperating module and the geometric configuration of the assembly, such as a box-slide, barrel-slide, or triangle-slide, is selective for a cooperating module. In certain embodiments of these modules one or more fluid control pathways are disposed to open to one or more sides of the module. These opening may be inlets and/or outlets depending on the type of modular embodiment. Another aspect of these fluid control pathways is that the physical disposition of these inlets or outlets must coordinate and cooperate with fluid control pathways of cooperating modules. Likewise, certain embodiments of these modules must possess the ability to be sealed in order to contain materials within the fluid control structures resident within the module. An aspect of this seal is that it must be reversible in order to allow fluid communication between modules. There are many ways to achieve this. For example, a first module could be made to possess a piercing device operatively recessed within a fluid control pathway thereby allowing an adhesive barrier placed over its opening and a second cooperating module could then be made to possess a protrusion having an operable diameter and extending from the second module that could also be sealed by an adhesive barrier. When the two modules are assembled in a preoperational configuration the two pathway would be operably opposed but not interconnected and when actuated to perform an analytical task the protrusion from the second module could be made to pierce the adhesive barrier of the first module while adhesive barrier of the second module would be pierced by the piercing device recessed within the fluid control pathway of the first module. Alternatively, a first module could be made to possess a self-healing stopper and a second module an exposed piercing device. In this configuration the two modules could be actuated in a manner that inserts and removes the piercing device one or more times depending on the operational parameters of the test being performed. Again, these are just a few possible means to establish fluid communication between one or more sealed modules and provide context for an operational aspect that may be necessarily required for the operation of certain embodiments of the present invention. 
         [0020]    The present invention also provides for the use of individually prepackaged reagents in an analytical cartridge. In this aspect of the present invention select volumes of analytical reagents are embodied as individual articles of manufacture, referred to as “wet cells”. Wet cells differ from blister packaging and preloaded reagents in that they are physically separable from the device, not integrated into the fluid control network and, have an internal volume that is defined by their packaging not the fill volume of a fixed reservoir in which they would otherwise be placed. They are self-contained individual articles of manufacture that may be made by means to interconnect into reagent clusters. Such means may include snaps, threaded connectors, adhesives, or simply grouped together. There are many advantages and utilities of employing individually prepackaged reagents. Select volumes of reagents can be manufactured in bulk and incorporated into an analytical device at later times and locations and since they are individually packaged they eliminate complex fluid containment strategies needed to prevent diffusion in resting fluids and allow reagents to be co-localized within different modules of various modular assemblages while providing for a simplified reagent release mechanism. They reduce waste, can be readily interchanged if they malfunction or reach the term of their life-expectancy, and can be specially packaged to extend the shelf-life of select reagents; such as, light impenetrable materials to encapsulate photosensitive reagents. Additional aspects of these wet cells provide that single-use or multi-use volumes of analytical material may be contained within a wet cell as the circumstances of a test may dictate. 
         [0021]    Another aspect of the present invention provides for programmable reagent delivery system physically embodied as a serialized reagent cluster. An aspect of this serialized reagent cluster translates the operational protocol of an analytical test into a prescribed physical arrangement of wet cells that contain a dispensable material needed to perform an analytical test. Said wet cells are arranged in linear series corresponding to the first, second, third, etc., reagent employed by an analytical test. This serial arrangement provides for the linear insertion of a cannula sequentially into each cell of said series in a temporally controlled manner allowing the contents of each cell to be dispensed through said cannula. Other aspects of this serialized reagent cluster provide for exploiting a mechanism-of-operation provided for by other aspects of the present invention; such as the generation of a compressive force provided for by the movement of two modules relative to each other as previously described, modules that may be made to possess slots to house other modular sub-assemblies, or the use of such a system in a syringe-like analytical system having a dual function plunger system which will be discussed later on. 
         [0022]    Another aspect of the present invention pertains to a compression form. Depending on the mechanism-of-operation for actuating the present system, certain embodiments may require the use of a compression form. A compression form is a structure made to possess openings enabled to receive and operably orient a serialized reagent cluster relative to a cannula in the formation of a reagent assemblage. The function of a compression form is to provide a space in which the cells of a reagent cluster may be compressed by the application of a compressive force to an end of the reagent cluster operable to compress each cell in said series. Certain embodiments of this compression form may be manufactured from a rigid material that resist deformation of the walls of said opening when acted on by the compression of a serialized reagent cluster by the compressive force. Other embodiments of the compression form may be manufactured from a material possessing qualities of operable compression and resilience that is also operable to resist the deformation of one or more serialized reagent clusters as both the compression form and serialized reagent cluster are compressed by a compressive force. Such a compression form may also possess operable absorptive qualities to absorb spillage of dispensable materials within the apparatus. Also, certain embodiments of this reagent assemblage may directly possess and position a cannula while in other embodiments it may be more favorable to locate the cannula elsewhere about the device. Another aspect of a serialized reagent cluster provides for the ability to communicate multiple fluids along a single fluid communication pathway which dramatically simplifies the fluid control network of devices enabled by the present invention, which in turn frees up more space for more tests. 
         [0023]    Another aspect of the present invention provides for a method for programming the operational protocol of one or more analytical tests through the use of serialized reagent cluster possessing both wet cells and dry cells. Dry cells, which lack a dispensable content, function to provide for incubation cycles by creating a physical separation between wet cells; the greater the separation, provided by the internal volume of the dry cell, the longer the incubation period. By allowing for incubation cycles between treatment cycles, dry cells allow multiple serialized reagent clusters to be temporally synchronized enabling multiple analytical tests to be performed in parallel. This could be achieved by actuating reagent clusters individually or collectively and in a manner that is incremental or continuous. The use of this methodology and apparatus allows one or more analytical tests to be configured in a way that is largely independent of the physical configuration of a fluid control network. This provides a highly degree of adaptability to performing different types of tests involving equivalent operational protocols, or highly diverse operational protocols that differ in the types, volumes, and timing of administration of various analytical reagents. 
         [0024]    Another aspect of the present invention provides for a number of possible modular assemblages that may be also be rendered operable to perform one or more analytical tests within the context of a single device by the inclusion of requisite analytical material needed to perform said tests. The following selections of possible embodiments have been provided to illustrate the present invention in a variety of context. The inclusion or exclusion of possible embodiments is not intended to be limiting in any way but rather serve to communicate the broader context of the present invention. A number of possible modular assemblages are realized and enabled to perform one or more analytical tests as a self-contained system in either a liquid, semi-solid, suspended-solid, or combination thereof; said systems may be a modular assemblage of two or more modules possessing a closed continuous-flow systems operable to perform one or more analytical tests, syringe based systems, electrophoresis systems, cell culture systems, and others. 
         [0025]    Many applications for the present invention are realized and encompass technical fields that employ fluid based analytics or analytics in semi-solid or suspended-solids environments. The embodiments provided herein are intended to illustrate the general utility of the present invention in a few select contexts and is not intended as an exhaustive list of each possible module configuration, cartridge embodiment, or all possible utilities of the present invention. The number and type of functional elements described herein are not intended to be limiting as it may be preferable to include different numbers and types of functional structures as specific analytical procedures dictate and not all functional structures, variations, or possible configurations are described herein. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0026]      FIG. 1A : Illustrates a possible module comprising: module  1 , reservoir  11 , boxed slide guides  12 , flange  13 , a cannula  14  and pneumatic port  15 . 
           [0027]      FIG. 1B : Illustrates an alternative embodiment of the module described in  FIG. 1A  comprising: module  1 , cannula  14 , and bulb assembly in its depressed state  16  and relaxed state  17 . 
           [0028]      FIG. 2 : Illustrates a possible module comprising: module  2 , reservoir  21 , cylindrical slide-guides  22 , flange  23 , cannula  24 , and pneumatic port  25 . 
           [0029]      FIG. 3 : Illustrates a possible module comprising: module  3 , open slot  31 , cylindrical slide  32 , box slide  33 , and boxed  340  slide-guide(s)  34 . 
           [0030]      FIG. 4 : Illustrates a possible module comprising: module  4 , closed structure  41 , cylindrical slide  42 , and box slide  43 . 
           [0031]      FIG. 5 : Illustrates a possible module comprising: module  5 , boxed slide(s)  51 , mixing chambers  52 , inlet(s)  53  and  54 , outlet(s)  55  and  56 , and a point of mechanical attachment  57  that could be present symmetrically on the opposing side of the module but not shown for visual clarity. 
           [0032]      FIG. 6 : Is an exploded perspective illustrating the assembly pattern of those modules illustrated in  FIG. 1-5  comprising: 
           [0033]    a first attachment between module(s)  2  and  5  by route of path  61  forming assemblage  2 : 5 , a second and third attachment between assemblage  2 : 5  and modules  3  and  4  by route of path(s)  62  and  63  forming assemblage  2 : 5 : 3 : 4 , a fourth attachment between assemblage  2 : 5 : 3 : 4  and module  1  forming the final assemblage  2 : 5 : 3 : 4 : 1 . Note that the various slide-guides provide compounding specificity to the assembly of additional modules into an operable final form. For example, the interconnection of module  5  with modules  3  and  4  would preclude module  2  from the assemblage. This is due to the cylindrical nature of the slide guides present on module  3  and  4  which require said modules to be inserted into the slide guides present on module  2  in a specific manner. 
           [0034]      FIG. 7A  is the first of a four part composite illustration describing the interconnection and operation of a 5 module assemblage: comprising, modules  1 - 5 , four paths of interconnection generally represented as Arrows  70 - 73 , and port(s)  74  and  75 . 
           [0035]      FIG. 7B  illustrates modules  1 - 5  in a resting assembled state. 
           [0036]      FIG. 7C  is a transparent view of modules  1 - 5  as depicted in  FIG. 7B  illustrating the hypothetical orientation and configuration of various internal structures within such a module. 
           [0037]      FIG. 7D  is the final part of  FIG. 7 : comprising arrows  76  and  77  that illustrate how modules  3  and  4  could be made to move inward relative to module  5  (dotted line). This movement would result in the compression of any materials located with modules  3  and  4 . 
           [0038]      FIG. 8  provides for a possible reagent module illustrated but not described in  FIG. 7C . Said module comprises: a series of cannula  81 , and compression form  82 , wet cells  83  containing a geometric shape indicating the presence of dispensable content, dry cells  84  black boxes indicating the absence of a dispensable content, various serialized reagent clusters  85  oriented to perform six analytical protocols  85 . 1  -  85 . 6  and temporally synchronized  86  into four stage(s) of actuation  86 . 1 - 86 . 4 , a module housing  87  indicated as open box for purposes of clarity and the operable assembly of the various elements into a reagent module  88 . 
           [0039]      FIG. 9  illustrates a possible reactor module  90  possessing plural paths of fluid communication. A first path of fluid communication originates at inlet  91  extends through a series of mixing chambers  95  and terminates at outlet  92 , a second path of fluid communication originates at inlet(s)  93  pass through individual mixing chambers  95  and terminates at outlet  94 . 
           [0040]      FIG. 10  illustrates how reagent module described in  FIG. 8  and the reactor module of  FIG. 9  could operate by moving the reagent module inward relative to the reactor module as previously described in  FIG. 7D  and provided for in item(s)  100 - 104 . Item  100  illustrates the operable interfacing of said reactor and reagent module in a resting state in addition to several identified and unidentified elements previously described in other images. In circumstances where an element is referred to by number but unidentified in the present image please refer to the first number of the numerical identifier associated with an element to locate the figure depicting the specific element; for example, item  81  would be located in  FIG. 8 , etc. Said elements comprise: cannula  81  and compression form  82  aligned with inlets  93  of the reactor module on one side and serialized reagent cluster(s)  85 . 1 - 85 . 6  on the other side. Note that the reactor module sits inside the reagent module in a movable configuration as provided for by boxed slides  51  of the reactor module and slide guides  34  of the reagent module as previously described. Item  101  illustrates a first incremental advancement of the reagent module relative to the reactor module. This results in the cannula piercing the first temporal sequence of cells  86 . 1  and the release of any dispensable contents into individual mixing chambers. Item  102 - 104  illustrates the incremental advancement and sequential release of temporal sequence  86 . 2 - 86 . 4  along with the corresponding discharge  105  of spent material through outlet  94 . 
           [0041]      FIG. 11  illustrates and alternative method of accessing the various reagent clusters. Similar to  FIG. 10 , items  110 - 113  illustrate how reagent clusters could be pressed onto a cannula  81  by means of a slide plunger  110 . 1  or screw plunger  110 . 2 . 
           [0042]      FIG. 12  Illustrates another possible modular assemblage  120 ; comprising, a plunger depressor  121 , plunger shaft  122 , bi-directional plunger with a vented flexible diaphragm  123 , a reagent module  124  a dual function sample/reactor module  125 , a threaded male connector  126 , and a cap  127 . Said reagent module further comprising a vented reagent module housing  124 . 1 , a serialized reagent cluster  124 . 2 , and cannula and reagent housing  124 . 3 . 
           [0043]      FIG. 13  illustrates select aspects pertaining to the operation of the embodiment described in  FIG. 12 . Item  130  depicts a device  120 , a sample source  130 . 1 , and a plunger apparatus in a closed state. Item  131  illustrates the upward pulling motion  131 . 1  of a plunger depressor  121 , an expansion between the plunger system and the reagent module  131 . 2 , the formation of a vacuum  131 . 3 , and the movement of a sample  131 . 4  into the dual function sample/reactor module. Item  132  illustrates the application  132 . 2  a cap  124  to the device and points out that in this configuration the opening  132 . 2  of the reagent module is visible. 
           [0044]      FIG. 13B  illustrates additional aspects pertaining to the operation of the device described in  FIG. 13A . Item  133  depicts the depression  133 . 1  of the plunger depressor  120 , the separation of the dual function plunger system into a stationary vented diaphragm  133 . 2  and a plunger  133 . 3  and the opening to the reagent module  132 . 2 . Item  134  illustrates that the continued advancement of the plunger system  134 . 1  presses the plunger against the reagent cluster  134 . 2  against the cannula provided within the reagent module  134 . 3  which sequentially dispenses the contents of the cell into the dual function sample/reactor module  134 . 4 . 
           [0045]      FIG. 14  Provides for a method of dividing a hypothetical fluid control network into functional divisions operable to be manufactured as individual modules. Item  140  provides for a hypothetical closed continuous-flow fluid control network operable to perform an analytical task consisting of a sample S reservoir, a mixing chamber M, a waste container W, and four reservoirs for storing analytical reagents r 1 , r 2 , r 3 , r 4 ; as well as, a first path of fluid communication solid arrows and a second path of fluid communication dotted arrows. The illustration of solid or dotted wavy arrows pointing at said network communicates the placement of means that push fluids through the present network (such as high pressure), whereas, the illustration of solid or dotted wavy arrows pointing away from the network communicates the placement of means that pull fluids through the present network (such a low pressure). Item  141  illustrates four possible functional divisions of the present network A, B, C, D. Item  142  illustrates how the present network could be further functionally reduced and provides four possible functional divisions A′, B′, C′, D′. 
       
    
    
     DETAILED DESCRIPTION 
       [0046]      FIG. 1A  Illustrates the various functional elements that might be present on a first module  1  said module comprising a sample tube  14 , a port  15  and, a cavity  11  enclosed within the substrate of the module and two independent pairs of reversible mechanical attachments  12  and  13  enabled to receive mechanical attachments from two cooperating modules. Referring to the cavity  11 , said cavity could be used to store a volume of fluid material; such as, used or unused analytical reagents or a sample. Said fluid material could be stored in this cavity by placing the supply tube  14  in fluid communication with a source of material and then subtracting a gas or other material from the cavity by way of the port  15 . This would establish a pressure gradient spanning the cavity resulting in the fluid material being drawn into the cavity. However, other options are available and may be more preferable for a specific analytical test. For example, said cavity could be set under a vacuum (not shown) by extracting all contents of the cavity and then sealing said cavity with a pierceable barrier. Then by means of interfacing said supply tube with a material source on one end and puncturing said seal with the other end induce fluid material to flow into said cavity as the internal pressure of the chamber moves toward equilibrium. Alternatively,  FIG. 1B  illustrates yet another method-of-operation to establish a pressure gradient across this cavity involving a squeeze bulb  16  operably interfaced with said cavity of the module  1 . The contents of the cavity could be evacuated by manually compressing the squeeze bulb  16  then the sample tube  14  could be interfaced with a material source and then by releasing the squeeze blub fluid material would be drawn into the cavity as the squeeze bulb restored itself to its original state  17 . There are numerous methods for establishing a pressure gradient across said cavity in order to fill said cavity without departing from the context of the present invention. The methods listed herein are a few examples selected for illustrative purpose only. Some mechanical features that might be present on a module are various embodiments of reversible mechanical attachment such as the pair of slide-guides  12  for receiving a slide (not shown) from a cooperating module on either side and the protruding flange  13  that could be adapted to fit into a groove of a cooperating module or could be made to possess an element of a clip such as a tooth that could interface with a groove on a cooperative module. This is an example of how a single module could be adapted to receive three additional modules to create an assemblage of four modules. It is understood that analytical cartridges containing  2  or more modules may be preferable for different analytical task and still be consummate within the context of the present invention. 
         [0047]      FIG. 2  Illustrates the various functional elements that might be present on a second module  2  said module comprising a sample tube  24 , a port  25  and, a cavity  21  enclosed within the substrate of the module and two independent pairs of reversible mechanical attachments  12  and  23  enabled to receive mechanical attachments from two cooperating modules. 
         [0048]      FIG. 3  Illustrates the various functional elements that might be present on a third module  3 . Said module comprising a slot  31  a first pair of reversible mechanical attachments  34  embodied as a pair of slide-guides set internal to the module for receiving a cooperating module within the slot and a second set of reversible mechanical attachments embodied as geometrically distinct slides  32  and  33  providing for the unambiguous attachment of a different cooperating module on each slide. 
         [0049]      FIG. 4  Illustrates the various functional elements that might be present on a fourth module  4 . Said module may be devoid of functional structures pertaining to a fluid control network and rather provide a specific geometry needed to convey a specific overall dimension to the final assembled form of the device. Such a module could also be used to house a battery, capacitor, resistors or other electrical device (not shown) intended to store, provide, or condition energy to the analytical cartridge. 
         [0050]      FIG. 5  Illustrates the various functional elements that might be present in a fifth module  5 . Said module possessing a fluid control network comprising a series of inlets  53  and  54  and outlets  55  and  56  arranged about the perimeter of the module, a series of mixing chambers  52 , an element of reversible mechanical attachment in the form of a groove  57  to connect a cooperating module at one end, in addition to four sets of slides  51  for providing a reversible connection to cooperating modules along each side. Additional elements to receive additional modules could be present about said module but are not included for purposes of visual clarity of the illustration. Likewise, the configuration of the fluid control network is for illustrative purposes only. A multitude of possible configurations could be employed depending on the quantity and type(s) of analytical procedures intended to be performed. An operational aspect of the fluid control network presently depicted are plural paths of fluid communication through mixing chambers  52 . The primary path originates at inlet  54 , passes through each of the mixing chambers, and terminates at outlet  55 . The secondary path(s) originate at individual inlets  53 , pass through an individual mixing chamber, and terminate at individual outlets  56 . In the present configuration, a sample could be drawn through the first path into each of the mixing chambers while the plurality of secondary paths could be used to introduce a number of analytical reagents to the mixing chamber. 
         [0051]      FIG. 6  Illustrates how a cartridge possessing five modules might be assembled. This figure illustrates the first module  1 , second module  2 , third module  3 , fourth module  4 , and fifth module  5  as previously set forth further interrelated by dotted lines  62 - 64  representing how each module could be assembled by means of the various reversible mechanical attachments as previously set forth. The order of assembly depicted in the present example is unambiguous in that a first connect between module(s)  5  and  2  along path  61  must be established to allow the connection of module(s)  3  to  5 , and module(s)  4  to  5  along paths  62  thereby creating a three module assembly. Doing so presents the path(s)  63  and  64  for module  1  to connected to module assemblage  2 ,  3 ,  4 , and  5 . This particular embodiment was selected as an example to convey how a multiple module assemblage could be bestowed with physical elements that direct the assembly of specific modules into a specific assemblage. This would be preferable for an array of analytical devices composed of modules having similar physical configuration but possessing different analytical tests that might be improperly assembled without these selective means. Among other structural elements of interest in this illustration is the manner in which the fluid control pathways are preferably configured to terminate about the perimeter of the module forming an open system enabled to interface with the fluid control pathways of cooperating modules. Additionally, the straight lined fluid control pathways  53  and  56  as depicted could be favorable in allowing direct access to the mixing chambers  52  which could enable a smaller diameter device to be inserted through said pathways and provide a means to automate the introduction of analytical reagents into the module prior to cartridge assembly. 
         [0052]      FIG. 7  is a four part illustration A, B, C, and D illustrating the assembly and operation of a possible five module cartridge assemblage receptive to both pneumatic and mechanical mechanism-of-operation emphasizing the utility of various slide/slide-guide as previously set forth in  FIG. 1-6 . The utility of a diagnostic cartridge having a generally conserved overall dimension and mechanism-of-operation is advantageous in consolidating the operation of a plurality of possible cartridge configurations to a single analytical device type. Accordingly, a device possessing similar numbers and forms of modules may promote ambiguity in selecting the correct modules for a final target assemblage. The present illustration depicts the use of a variety of mechanical attachments in a manner that is both cooperative and selective to promote an unambiguous assembly pattern for specific modules. The utility of this assembly schema is for illustrative purposes only. Alternative configurations exist that can achieve an equivalent result, and the use of ambiguous elements of mechanical assembly across cartridge types may be favorable in some situations. Likewise, the weighted reliance on a five module assemblage was selected to provide a modular cartridge of intermediate complexity and is not intended to imply or otherwise limit the present invention to the present cartridge dimension. It is realized that the modularity of the present invention lends to many possible configurations of operable diagnostic cartridges and depending on the field of use and the types and quantity of tests needed and it may be preferable to employ modular assemblages possessing two or more modules as the circumstances dictate. 
         [0053]      FIG. 7A  Illustrates the five modules as previously set forth in  FIG. 1-5 , and the assembly pattern as depicted in  FIG. 6 . In the present example configuration the assembly of this cartridge would begin with the interconnection of the waste module  2  and the reactor module  5  by path  70 , referring to  FIG. 6  in this configuration the waste module provides the points of attachment (in the form of slides) needed to receive each reagent module, which would be interconnected to reagent module  4  by path  71 , then reagent module  3  by path  72 . In this configuration the two reagent modules and the reactor module provide the points of attachment needed to receive the sample module. 
         [0054]      FIG. 7B  shows a top view of the five modules in an assembled state and emphasizes the two ports located on the sample module  74  and waste module  75  for use in, among other things, establishing a pressure gradient across the reactor module. Such a pressure gradient could be used as a first mechanism-of-operation to induce the movement of a sample resident within the sample module into and through the reactor modules by adding a gas or liquid through port  74  while simultaneous subtracting a gas or liquid from port  75 . 
         [0055]      FIG. 7C  is a transparency view of the inner structures of each module and intended to illustrate how the fluid control pathways of each possible module would operably interrelate to form a closed continuous-flow fluid control network specific for one or more select analytical task. 
         [0056]      FIG. 7D  illustrates how modules  3  and  4  could be made to move inward relative to module  5  along the slides/slide guides provided by modules  1 ,  2 ,  3 ,  4 , and  5 . This motion could provide a second mechanism-of-operation by compress a content held within a slot present within module  3  or  4  as described in  FIG. 3  and generally evident by the motion as illustrated inferring the encapsulation of module  5  (dotted lines) by module  3  and  4 . In this example, the inward motion of modules  3  and  4  would completely obstruct the mixing chambers of module  5  if it were not for the windows provided by both module  3  and  4  (semi-circular cut outs). The use of such windows would be favorable in acquiring information pertaining to an analytical reaction where an unobstructed view into each mixing chamber was beneficial. 
         [0057]      FIG. 8  Illustrates a possible configuration of a module and a corresponding reagent assemblage. For illustrative purposes only, said module is depicted to comprise six cannule  81  operably positioned above a six compartment compression form  82  and a plurality of individualized cells having a select internal volume. Said cells composed of dry cells  85  (black boxes lacking a dispensable content) and wet cells  86  (white boxes containing a geometric shape symbolizing a dispensable content). Said cells are then arranged in series corresponding to six hypothetical analytical protocols  85 . 1 ,  85 . 2 ,  85 . 3 ,  85 . 4 ,  85 . 5 ,  85 . 6 . Each cell series is then inserted into the compression form wherein the cell corresponding to the first stage of each protocol is oriented closest to the cannula. Doing so orients each cells series into temporally synchronized stages  86 . 1 ,  86 . 2 ,  86 . 3 ,  86 . 4 . The reagent assemblage comprising the cannula  81 , compression form  82 , and serial arrangements of reagents  85  is then inserted into a module  87  possessing an operable slot for receiving said assemblage (depicted as a boxed line for simplicity) to form an assembled reagent module  88 . Again any number of analytical procedures could be programmed utilizing this methodology; the examples presented herein illustrate one possible configuration. 
         [0058]      FIG. 9  Illustrates a possible reactor module  90  possessing plural flow paths of fluid communication passing through at a series of mixing chambers  95 . For the purposes of this example, a first flow paths originates at inlet  91  passes through each mixing chamber and terminates at outlet  92 , the second flow path originates at each individual inlets  93  passes through one mixing chamber and terminates at outlet  94 . For simplicity this illustration does not depict the use of a fluid control device with the illustrated fluid control network however such devices (e.g. choke points, valves, gates, diaphragms valves either active and/or passive) may be present within the various types of modules subject to the present invention. 
         [0059]      FIG. 10  comprises a sequence of illustrations, item(s)  100 ,  101 ,  102 ,  103 ,  104 , to demonstrate how a possible reagent assemblage employing a uniform form of actuation could dispense individual reagents to distinct analytical procedures in a temporally control manner. Item  100  depicts the four temporally synchronized stages  86 . 1 ,  86 . 2 ,  86 . 3 ,  86 . 4  of the six analytical reactions previously described in  FIG. 8  as well as outlet  94  and the fluid control network previously described in  FIG. 9 . Item  105  signifies the discharge of spent solutions through outlet  94 . For the purposes of this example, a pressure gradient across the mixing chambers would be established by compressing the reagent module against the reactor module while lowering the pressure at outlet  94  to decrease the internal pressure of the mixing chamber. As item  101  illustrates, the compression of the reagent module against the reactor module compresses the serialized reagent cluster thereby raising the internal pressure of each cell and actuates the insertion of a cannula into the first cell of each reagent series  86 . 1 . This, in conjunction with lowered pressure at outlet  94 , would promote the flow of any dispensable content held within the cells to flow down the pressure gradient through the cannula and into the mixing chambers. Reading left to right across the mixing chambers ‘xN’ signifies individual chambers followed by a hypothetical analytical reagent. Image(s)  101 ,  102 ,  103 , and  104  illustrates the sequential release of each reagent sequence as the reagent module is compressed into the reactor module: 
         [0060]    Item  101 / 86 . 1 : x1=incubation, x2=square, x3=circle, x4=incubation, x5=triangle, x6=circle. 
         [0061]    Item  102 / 86 . 2 : x1=star, x2=incubation, x3=incubation, x4=incubation, x5=star, x6=triangle. 
         [0062]    Item  103 / 86 . 3 : x1=circle, x2=incubation, x3=square, x4=circle, x5=circle, x6=incubation. 
         [0063]    Item  104 / 86 . 4 : x1=square, x2=star, x3=incubation, x4=square, x5=square, x6=incubation. 
         [0064]    Note that the administration of each successive reagent provides the requisite positive pressure to displace spent reagent(s)  105  out of the mixing chamber and through port  94  and into a waste module (not shown) but a number of alternatives are also apparent for collecting waste material. For example, the internal structure of the reactor module, separate from the mixing chambers and other fluid control pathways, could be dedicated to storing spent solutions. Likewise, multiple waste modules could be positioned about the perimeter of the reactor module to enable alternate configurations of discharge outlets for different fluid control networks. As previously stated, this example is illustrative only. Any number of reactions, reagent configurations, and fluid control architecture could be employed to perform different analytical procedures as the circumstances dictate. Likewise, the present illustration depicts the pressing of a cannula onto a cell but a similar result could be achieved by pressing the cells onto a cannula as is illustrated in  FIG. 11 . 
         [0065]      FIG. 11  is a four part composite illustration of images  110 ,  111 ,  112 ,  113  which illustrates how a threaded screw or plunger could be employed to depress a cell arrangement onto a cannula, which is the inverse motion set forth in  FIG. 10 . Item  110  depicts a cannula  81 , compression form  82 , wet cells  83 , dry cells  84 , reagent module  87 , and cell series as previously described in  FIG. 8  with the addition of a plunger  110 . 1 , threaded screw  110 . 2  or other similar type of linear actuator such as a human finger (not shown). Item 111 demonstrates how operable force or twisting motion if applied to the plunger  110 . 1  or threaded screw  110 . 2  would result in pressing the cell series through the compression form and onto a cannula. Items  112  and  113  depict how multiple reagents could be controlled by the same motion. The use of such a configuration may be advantageous in providing additional flexibility in performing one or more test protocols. Likewise, the use of serialized reagents in the programmable reagent delivery system as previously set forth may be employed in a more simplified fluidically controlled analytical system. 
         [0066]      FIG. 12A  illustrates a possible two-module analytical cartridge  120  possessing a simplified fluidic control system. It comprises a plunger depressor  121 , plunger shaft  122 , bi-direction plunger with vented flexible diaphragm  123 , a reagent module  124 , a dual function sample/reactor module with graduations for measuring sample volume  125 , a threaded male connector  126 , and a threaded cap  127 . The reagent module is vented and designed to be inserted into the analytical cartridge, while positioning a reagent cell series within a compression form having a cannula, as set forth in previous figures. This configuration could be used to perform a single test on a liquid sample derived from a number of sources. 
         [0067]      FIG. 13A  illustrates how the device  120  described in  FIG. 12  might operate to collect a sample. Item  130  illustrates how the device with the bi-directional plunger in a operably depressed position  130 . 2  might interface with a liquid sample  130 . 1 . Item  131  illustrates how pulling upward  131 . 1  on the plunger  121  will retract the vented diaphragm of the bi-direction plunger  131 . 2  resulting in a vacuum  131 . 3  that would induce the movement of the sample into the dual function sample/reactor module  131 . 4 . Item  132  illustrates how a screw cap  124  could be secured  123 . 1  to the device once an adequate sample has been collected. Additionally, the illustration emphasizes that the lifting of the plunger reveals the opening of the reagent module  132 . 2 . 
         [0068]      FIG. 13B  illustrates how the device  120  could be operated to perform a test on a sample. Item  133  illustrates how the depression  133 . 1  of the bi-directional plunger would separate the vented flexible diaphragm  133 . 2  from the plunger  133 . 3  leaving the diaphragm in a stationary position pressed against the internal wall of the device. The vents illustrated on the flexible diaphragm  133 . 2  provide for the equalization of atmosphere between the upper  133 . 4  and lower  133 . 5  compartments formed by the diagram as the plunger  133 . 3  interfaces with the reagent cell series seated into the opening of the reagent compartment  133 . 6 . Item  134  illustrates how further depressing the plunger  134 . 1  would result in the plunger entering into the reagent module and sequentially compress each reagent cell  134 . 3  onto a cannula releasing the contents into the mixing compartment  134 . 4 . Again the present illustration is not intended to be limiting a wide range of modular configurations and configurations of reagent cells are envisioned having unique advantages to different test protocols. The utility of a non-vented diaphragm in sealing contents within the device is realized for applications where it would be preferable to prevent spillage of contents from the device. 
         [0069]      FIG. 14  illustrates how to create a continuous-flow modular diagnostic cartridge. Item  140  illustrates a possible closed fluid control network enable to perform an analytical task involving a sample reservoir S, four distinct analytical reagent containers r 1 , r 2 , r 3 , r 4  having a defined temporal sequence of administration defined by flow path dotted arrows. Each reagent must travel to reach a mixing chamber M, and a waste reservoir W. Item  141  illustrates an aspect of the present invention pertaining to how a fluid control network could be divided into functional groupings A, B, C, D that could be manufactured as individual modules. Item  142  illustrates another aspect of the present invention pertaining to how the same fluid control network could be reconfigured and divided into functional grouping that are functionally reduced A′, B′, C′, D′. 
         [0070]    The present illustrations are representative only and provide only a few possible contexts in which the present invention could be employed are not intended to limit the scope of all possible applications for the present invention in any way.