Patent Publication Number: US-2017368255-A1

Title: Illuminated infusion line and systems

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to and the benefit of U.S. Provisional Patent Application Ser. No. 62/354,617, filed Jun. 24, 2016 and titled “ILLUMINATED INFUSION LINE AND SYSTEMS,” the disclosure of which is incorporated herein by this reference in its entirety. 
    
    
     BACKGROUND 
     1. The Field of the Invention 
     The present disclosure generally relates to systems for the intravenous administration of medications, fluids, and/or nutrients. More particularly, the disclosure relates to systems and devices for distinctly identifying each of several intravenous lines used to intravenously administer medications, fluids, and/or nutrients. 
     2. The Relevant Technology 
     In a hospital setting, patients are often administered liquid medications, fluids, and nutrients (hereinafter collectively referred to as “therapeutic fluids”) via intravenous lines (hereinafter referred to as “IV lines”). IV lines generally consist of flexible, plastic tubing connected at one end to a fluid source and at another end to a needle or port that provides access to a blood vessel/artery of a patient. It is not uncommon for multiple IV lines, each connected to a different source of fluid, to be used simultaneously to deliver several therapeutic fluids at once to a single patient. It is also not uncommon for the needles or ports to be located adjacent to one another, such as multiple adjacent needles providing access into the brachial vein running through the arm of the patient. 
     While the simultaneous use of multiple IV lines can provide numerous benefits, some challenges can also be encountered. For instance, when multiple IV lines are used to administer multiple therapeutic fluids to a single patient, it can become cumbersome and difficult to readily identify one IV line from another. Thus, it can be difficult to quickly and accurately identify a particular therapeutic fluid source and corresponding therapeutic fluid output compared to another medication source and its corresponding therapeutic fluid output. This problem is aggravated by the tendency of each of the intravenous lines to coil up to their packaged configuration and consequently tangle with other IV lines or tangle under bed sheets or clothing. 
     Quick identification of a particular therapeutic fluid source is often required in emergency situations. For example, when a patient hooked up to multiple IV lines is in need of emergency intravenous administration of a therapeutic fluid not currently being provided through one of the IV lines, it is necessary to immediately provide that therapeutic fluid. If a blood vessel cannot rapidly be located into which the therapeutic fluid can be injected, it is common practice to provide the drug through an IV line in which a therapeutic fluid is already being administered. This practice of using existing IV lines to administer new therapeutic fluids is also common in non-emergency situations. The person administering the drug, however, must be sure that the IV line through which the new therapeutic fluid is administered is carrying a therapeutic fluid which is compatible with the new therapeutic fluid. Severe results may occur if a new therapeutic fluid is injected through an IV line in which the therapeutic fluid already flowing therethrough is not compatible with the new therapeutic fluid. For example, if heparin is injected into an IV line through which lidocaine is already flowing, a flakey precipitate will form in the mixture which can be dangerous to a patient. Similarly, mixing insulin with certain chemotherapy drugs in a common IV line can be extremely dangerous for a patient. 
     As a result of the difficulties in distinguishing between multiple IV lines and their associated fluid sources and outputs and the potentially life-threatening possibilities that can occur if incompatible therapeutic fluids are injected through the same IV line, there is a need for devices and systems that allow for ready and accurate identification of individual IV lines with their associated fluid sources and outputs. 
     BRIEF SUMMARY 
     In an embodiment, an intravenous infusion line assembly includes an elongated member and an optical member. The elongated member has a fluid conduit for administering therapeutic fluid to a patient by providing fluid communication between a first end of the elongated member and a second end of the elongated member. The optical member is at least partially affixed to the elongated member, and is at least partially optically transmissive to internally reflect light within the optical member. 
     In another embodiment, an intravenous infusion line identification system includes an intravenous therapy system for administering therapeutic fluid to a patient and a light source. The intravenous therapy system includes a therapeutic fluid input, and a therapeutic fluid output with an elongated member and optical member. The elongated member provides fluid communication from the therapeutic fluid input to the therapeutic fluid output. The optical member is at least partially coupled to the elongated member, and is at least partially optically transmissive to internally reflect light within the optical member. In some configurations, the optical member is at least partially coupled to the elongated member with a plurality of rigid fasteners/clamps. The light source is selectively couplable to the optical member and configured to provide light into the optical member. In some configurations, the light source is selectively attachable to the elongated member by with a plurality of clips. 
     In yet another embodiment, a method of identifying an infusion line being used to administer therapeutic fluids to a patient includes providing an infusion line having an optical member; positioning a light source adjacent to the optical member; and directing a light from the light source into the optical member. The optical member is configured to reflect at least a first portion of the light internally within the optical member. 
     These and other objects and features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is appreciated that these drawings depict only illustrated embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which: 
         FIG. 1  illustrates a schematic view of an embodiment of an intravenous (“IV”) infusion line assembly, according to the present disclosure; 
         FIG. 2  illustrates a transverse cross-sectional view of the embodiment of an IV infusion line assembly of  FIG. 1 , according to the present disclosure; 
         FIG. 3A  illustrates a perspective view of an embodiment of the IV infusion line assembly, according to the present disclosure; 
         FIG. 3B  illustrates a top view of an embodiment of the IV infusion line assembly, according to the present disclosure; 
         FIG. 3C  illustrates a right side view of an embodiment of the IV infusion line assembly, according to the present disclosure; 
         FIG. 3D  illustrates a cross-sectional front view of an embodiment of the IV infusion line assembly, according to the present disclosure; 
         FIG. 3E  illustrates a perspective view of a line fastener, according to the present disclosure; 
         FIG. 3F  illustrates a front view of a line fastener, according to the present disclosure; 
         FIG. 3G  illustrates a rear view of a line fastener, according to the present disclosure; 
         FIG. 3H  illustrates a bottom view of a line fastener, according to the present disclosure; 
         FIG. 3I  illustrates a top view of a line fastener, according to the present disclosure; 
         FIG. 3J  illustrates a right side view of a line fastener, according to the present disclosure; 
         FIG. 3K  illustrates a left side view of a line fastener, according to the present disclosure; 
         FIG. 4  is a side view of an embodiment of an IV infusion line identification system, according to the present disclosure; 
         FIG. 5  illustrates an exploded perspective view of an embodiment of a light source, according to the present disclosure; 
         FIG. 6  is a partial cutaway side view of the embodiment of an IV infusion line identification system of  FIG. 4 , according to the present disclosure; 
         FIG. 7A  illustrates an embodiment of a light source, according to the present disclosure; 
         FIG. 7B  illustrates a side view of the embodiment of a light source of  FIG. 7A , according to the present disclosure; 
         FIG. 8  is a side view of another embodiment of an IV infusion line identification system, according to the present disclosure; 
         FIG. 9A  is a partial cutaway side view of the embodiment of an IV infusion line identification system of  FIG. 8 , according to the present disclosure; 
         FIG. 9B  is a partial cutaway end view of the embodiment of an IV infusion line identification system of  FIG. 8 , according to the present disclosure; 
         FIG. 10A  is a transverse cross-sectional view of another embodiment of an IV infusion line, according to the present disclosure; 
         FIG. 10B  is a longitudinal cross-sectional view of the embodiment of an IV infusion line of  FIG. 10A , according to the present disclosure; 
         FIG. 11  is a side view of an embodiment of an IV infusion line with an inline filter, according to the present disclosure; and 
         FIG. 12  is a side view of an embodiment of an IV infusion line with an inline rotary pump, according to the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The embodiments described herein extend to methods, devices, systems, assemblies, and apparatus for identification of intravenous (“IV”) infusion lines. Such are configured to, for example, enable the reliable identification of one IV infusion line from another in a simple and efficient manner to prevent the inadvertent injection of incompatible therapeutic fluids through a single IV infusion line. An IV infusion line identification system, as described herein, may reduce the number of misidentified infusion lines without significant changes to the existing clinical methods and/or equipment. 
     Reference will now be made to the drawings to describe various aspects of exemplary embodiments of the invention. It is understood that the drawings are diagrammatic and schematic representations of such exemplary embodiments, and are not limiting of the present invention, nor are any particular elements to be considered essential for all embodiments or that elements be assembled or manufactured in any particular order or manner. No inference should therefore be drawn from the drawings as to the necessity of any element. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be obvious, however, to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other cases, well known aspects of IV lines and related devices and methods, general manufacturing techniques, and the like are not described in detail herein in order to avoid unnecessarily obscuring the novel aspects of the present invention. 
       FIGS. 1 through 12  and the following discussion are intended to provide a brief general description of exemplary devices in which embodiments of the invention may be implemented. While IV therapy apparatuses for administering therapeutic fluids are described below, this is but one single exemplary application for the present invention, and embodiments of the invention may be implemented in other applications, both within the medical field and in other technical fields. Accordingly, throughout the specification and claims, references to medical devices and systems, such as “IV lines,” “IV bags,” “pumps,” “needles,” “ports,” “IV therapy systems,” and the like, are intended to apply broadly to any type of items that may need to be individually identified and distinguished from other similar items, as described herein. 
     Furthermore, while embodiments of IV therapy systems are shown and described, it will be understood that these are merely exemplary embodiments. Various components of these exemplary embodiments may be excluded or replaced with other components known and used in the art. By way of non-limiting example, some of the exemplary embodiments include IV bags, pumps, and connectors. Each of these components could be eliminated or replaced with other components. For instance, various types of pumps, or no pump at all, can be used with the systems. Similarly, various types of fluid sources and connectors other than IV bags and Y-connectors could be employed. 
     With reference to  FIG. 1 , there is illustrated an IV infusion line assembly  100  for use in administering therapeutic fluid to a patient. The IV infusion line assembly  100  includes an elongated member  102  with a fluid conduit thereto. The fluid conduit may provide fluid communication for one or more therapeutic fluids, such as saline, medications, or nutrients. The IV infusion line assembly  100  includes an optical member  104  that is at least partially affixed to the elongated member  102 . The optical member  104  is at least partially optically transmissive, such that light may pass through the optical member  104 . 
     In some embodiments, the elongated member  102  may have a therapeutic fluid input  106  and a therapeutic fluid output  108 . The therapeutic fluid input  106  may allow the elongated member to connect to a reservoir of therapeutic fluid, such as an IV bag, a glass bottle, a plastic bottle, a syringe, or other sterile reservoir. At an opposing end of the elongated member  102  is a therapeutic fluid output  108 . The therapeutic fluid output is configured to connect the elongated member  102  to an access device (not shown), such as a needle or port, so that the elongated member  102  can provide fluid communication to a patient. 
     The optical member  104  has a first end  110  and a second end  112 . In some embodiments, the first end  110  is located proximate the therapeutic fluid input  106  of the elongated member  102  and the second end  112  is located proximate the therapeutic fluid output  108  of the elongated member  102 . At least a portion of the elongated member  102  and optical member  104  are fixed relative to one another. The elongated member  102  and optical member  104  are flexible, such that the optical member  104  and elongated member  102  may move as one or the other is moved. In some embodiments, the entire length of the optical member  104  is fixed to the elongated member  102 . In other embodiments, a portion less than the entire length of the optical member  104  is fixed to the elongated member  102 . In some embodiments, the first end  110  of the optical member  104  is fixed to the elongated member  102  and the second end  112  is fixed to the elongated member  102 . 
     The optical member  104  may be optically transmissive to allow light to pass through and/or be transmitted by the optical member  104 . In some embodiments, the optical member  104  may have a transmission percentage in visible wavelengths in a range having an upper value, a lower value, or upper and lower values including any of 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or any values therebetween. For example, the optical member  104  may have a transmission percentage in visible wavelengths greater than 40%. In other examples, the optical member  104  may have a transmission percentage in visible wavelength less than 95%. In yet other examples, the optical member  104  may have a transmission percentage between 40% and 95%. In further examples, the optical member  104  may have a transmission percentage between 50% and 90%. 
     In some embodiments, the optical member  104  may be a fiber optic cable. For example, at least a portion of a light that is provided at the first end  110  of the optical member  104  may be conveyed to the second end  112  of the optical member  104 . The light may be conveyed from the first end  110  to the second end  112  via internal refraction. For example, the optical member  104  may have a first index of refraction and the surrounding environment, such as air, may have a second index of refraction that is less than the first index of refraction. The light may propagate along the inside of the optical member  104  in a longitudinal direction refracting off of the surface of the optical member  104  at an angle less than a critical angle, at least partially dependent on the relationship of the first index of refraction and the second index of refraction. In some embodiments, the optical member  104  may have an index of refraction greater than 1.5. In other embodiments, the optical member  104  may have an index of refraction greater than 1.8. In yet other embodiments, the optical member  104  may have an index of refraction greater than 2.0. 
     In some embodiments, the optical member  104  may be configured to convey at least a portion of the light in a longitudinal direction (i.e., from the first end  110  to the second end  112  or vice versa). The optical member  104  is configured to emit at least some of the light in a transverse direction (i.e. in a direction transverse to the longitudinal direction) and between the first end  110  and the second end  112 . For example, when a light is provided at the first end  110  of the optical member  104 , at least 10% of the light is emitted transversely along the length of the optical member  104 . In other examples, when a light is provided at the first end  110  of the optical member  104 , at least 20% of the light is emitted transversely along the length of the optical member  104 . In yet other examples, when a light is provided at the first end  110  of the optical member  104 , at least 30% of the light is emitted transversely along the length of the optical member  104 . In at least one example, when a light is provided at the first end  110  of the optical member  104 , at least 50% of the light is emitted transversely along the length of the optical member  104 . 
       FIG. 2  illustrates a transverse cross-sectional view of the IV infusion line assembly  100  of  FIG. 1 . The elongated member  102  has an outer surface  114  and an inner surface  116 . The inner surface  116  defines a fluid conduit  118  that extends longitudinally through the elongated member to provide fluid communication therethrough. The fluid  120  may be a therapeutic fluid provided from a reservoir to a patient. 
     In some embodiments, the optical member  104  may be uniform along a length thereof. In other embodiments the optical member  104 , as shown in  FIG. 2 , includes a plurality of scattering elements embedded in the optical member  104  to scatter light transmitted therethrough and emit the light through a sidewall of the optical member  104 . 
     In some embodiments, the optical member  104  may be at least partially affixed to the outer surface  114  of the elongated member  102 . For example, the optical member  104  may be affixed to the outer surface  114  of the elongated member  102  with a plurality of fasteners or clamps. In other examples, the optical member  104  may be adhered to the outer surface  114  with an adhesive positioned therebetween. In yet other examples, the optical member  104  may be directly bonded to the elongated member  102 , such as by partially melting of the optical member  104  and/or elongated member  102  to bond the material of the optical member  104  and elongated member  102 . The optical member  104  and elongated member  102  may be bonded together by sonic welding, by frictional welding, by application of heat from an external source, or by other partial melting methods. Embodiments may include any combination of said or other means for at least partially affixing the optical member  104  to the outer surface  114  of the elongated member  102 . 
       FIGS. 3A through 3D  illustrate various views of an embodiment of the IV infusion line assembly  100  of  FIG. 1  in which the optical member  104  is at least partially coupled to the elongated member  102  with a plurality of line fasteners  130  (also referred to herein as “rigid clamps”). As used herein, the “rigid clamps” are “rigid” in that they do not necessarily require moving parts for adapting to and fastening the optical member  104  and elongated member  102 . The “rigid clamps” may therefore include an amount of flexibility inherent in the material in which they are made (e.g., a suitable polymer or metal material). 
     The rigid clamps  130  include a first opening  131  and a second opening  132 , each adapted to receiving the optical member  104  and the elongated member  102 . The rigid clamps  130  have a first groove  140  adapted to removably secure the optical member  104 . The rigid clamps  130  also have a second groove  141  and a third groove  142 , which are adapted to, in tandem, removably secure the elongated member  102 . For example, a user may loop the optical member  104  and elongated member  102  through the respective openings  131  and  132 , may position the optical member  104  within the first groove  140 , and may position the elongated member  102  within the second groove  141  and third groove  142 . 
     In one of arrangement, the rigid clamps  130  are spaced about six to eight inches apart along the length of the IV infusion line assembly  100 . Although six to eight inch spacing is the presently preferred configuration, other configurations may include tighter spacing (e.g., a half inch of space between the rigid clamps  130  along the length of the IV infusion line assembly  100 ), looser spacing (e.g., fourteen inches of space between the rigid clamps  130  along the length of the IV infusion line assembly  100 ), a non-uniform spacing arrangement (e.g., with variable spacing between the rigid clamps  130  along the length of the IV infusion line assembly  100 ), etcetera. 
       FIGS. 3E through 3K  show additional views of the exemplary rigid clamp  130 . In the illustrated embodiment, the first groove  140  has a smaller diameter than that of the second and third grooves  141  and  142 . Such a configuration beneficially allows the relatively smaller optical member  104  to engage with the first groove  140  while the relatively larger elongated member  102  engages with the second and third grooves  141  and  142 . In other embodiments, the groove sizes may be adjusted according to corresponding sizes of elongated members and/or optical members. In some implementations, the positions of the elongated member  102  and the optical member  104  may be reversed. Other embodiments may additionally or alternatively use other types of fasteners or clamps (e.g., spring-loaded clamps, hinged clasps) to at least partially couple the optical member  104  to the elongated member  102 . 
     In some embodiments, the connection between the elongated member  102  and the optical member  104  may be breakable by a user. For example, at least a portion of the longitudinal length of the connection between the elongated member  102  and optical member  104  may be broken (e.g., the elongated member  102  and optical member  104  may be pulled apart from one another) to allow the use of inline filters, rotary pumps, or for connection of other devices, as needed by a user. 
     For example,  FIG. 4  illustrates an embodiment of an IV infusion line identification system with an IV infusion line assembly  200  with at least a portion of the optical member  204  branched from the elongated member  202  to allow a light source  222  to connect to the optical member  204 . The light source  222  may be coupled to the IV infusion line assembly  200  prior to a sterilization procedure (e.g., gamma radiation, ethylene oxide gas). Alternatively, the light source  222  may be a portable light source reusable with a plurality of IV infusion line assemblies  200 . For example, a user, such as a doctor, a nurse practitioner, a physician&#39;s assistant, etc., may carry a light source  222  as described herein, and use the light source with a plurality of IV infusion line assemblies  200  on a single patient or with multiple patients. Typically, however, the light source  222  will be coupled to the IV infusion line assembly  200  prior to sterilization so that the system may be provided to users in a sterile and ready-to-use state. 
     The light source  222  may be selectively coupled to the optical member  204  to provide a light to the optical member  204 . The light source  222  may include an outboard power supply, such as a rechargeable and/or replaceable battery, allowing the light source  222  to be carried with a user. In other embodiments, the light source  222  may have one or more connectors to allow the light source  222  to be connected to an external power source. The light source  222  may provide light to the first end  210  of the optical member  204  to illuminate the optical member  204  along a longitudinal length of the optical member  204 . In other embodiments, the light source  222  may provide light to the second end (e.g., the second end  112  as shown in  FIG. 1 ) of the optical member  204  and illuminate the optical member  204  along a longitudinal length of the optical member  204 . 
       FIG. 5  illustrates an exploded view of an embodiment of a light source  222  of  FIG. 4 . The light source  222  includes an O-ring slot  250  for receiving an O-ring  251 . The O-ring  251  is adapted to removably secure the optical member  204  to provide selective coupling between the optical member  204  and the light source  222 . Other embodiments may additionally or alternatively use other means for effecting selective coupling between the optical member  204  and the light source  222  (e.g., friction fitting, adhesive, clamps). 
     In some embodiments, the light source  222  may be activated by a user-operated manual switch, such as the illustrated push button  240 . Although the user operable manual switch is a presently preferred embodiment, other embodiments may include systems for automatically activating the light source  222  upon coupling the optical member  204  to the light source  222 , as described below with respect to  FIG. 6 .  FIG. 6  illustrates a cross-sectional view of one optional configuration of the light source  222  of  FIG. 4  which includes a sensor for automatic actuation of the light source  222  (e.g., as an alternative to a manual switch). The light source  222  may have a light emitting diode (“LED”)  224 , light bulb, laser diode, or other photon source positioned adjacent a cavity  226  in the light source  222 . The cavity  226  may have a sensor  228  positioned in a side of the cavity  226 . The sensor  228  may be configured to sense the presence of an optical member  204  positioned in the cavity  226 . The sensor  228  is operably coupled to the LED  224  to allow electricity to the LED  224  upon sensing the presence of the first end  210  (or second end) of the optical member  204  in the cavity  226 . In other words, the light source  222  provides a light to the optical member  204  when the user inserts a portion of the optical member  204  into the light source  222 . In some embodiments, the LED  224  may be positioned at a rear end  230  of the cavity  226 . In other embodiments, the LED  224  may be positioned at other orientations to the cavity  226 . 
     The sensor  228  may be a physical sensor, such as a switch, toggle, or button that senses the optical member  204  via mechanical contact with the optical member  204 . In other embodiments, the sensor  228  may be an optical sensor, such an infrared sensor, UV sensor, laser sensor, or other sensor that senses the optical member  204  via interference between the optical member  204  and an emitted signal. 
       FIGS. 7A and 7B  illustrate another embodiment of a light source  722 . The light source  722  may be configured in a fashion similar to that of the light source  222  of  FIG. 4  except as noted below. The light source  722  may be selectively attachable to the elongated member  702  by means of a first clip  761  with a first opening  771  facing a first direction, a second clip  762  with a second opening  772  facing a second direction opposite the first direction, and a third clip  763  with a third opening  773  facing the first direction. Other embodiments may use a single clip. In such embodiments, the single clip may extend across approximately a majority of the length of the light source  722 . Other embodiments may include a plurality of clips (with at least one facing an opposite direction from one other), a plurality of clips with openings facing the same direction, a channel groove, a plurality of channel grooves, or other structural configurations for making the light source  722  selectively attachable to the elongated member  702 . 
     In the illustrated embodiment, the clips  761 ,  762 , and  763  are arranged so as to be spread across a sufficient length of the light source  722  to provide a connection when the light source  722  is coupled to the elongated member  702 . For example, the distance between the first clip  761  and third clip  763  may be about 50% to about80% of the overall length of the light source  722 . 
       FIG. 8  illustrates another embodiment of an IV infusion line identification system with an IV infusion line assembly  300  with a first end  310  of the optical member  304  coupled to the elongated member  302 . The light source  322  is configured to connect over the elongated member  302  and the optical member  304  from the transverse direction to provide light to the first end  310  (or second end) of the optical member  304  without having to decouple an end of the optical member  304  and the elongated member  302 . 
       FIGS. 9A and 9B  show detail views of the embodiment of a light source  322  of  FIG. 8 .  FIG. 9A  shows a cross-sectional side view of the IV infusion line assembly  300  positioned in the light source  322 . The cavity  326  of the light source  322  shown in  FIGS. 9A and 9B  is configured to allow the elongated member  302  to extend through the light source  322  while the optical member  304  terminated in the light source  322  adjacent an LED  324  (or other photon source). 
       FIG. 9B  shows an end view of the light source  322  showing a sensor  328  in a wall  332  of the cavity  326  shown in  FIG. 9A . Referring again to  FIG. 9B , the sensor  328  may be configured to sense the presence of the elongated member  302  positioned in the light source  322 . Similar to the sensor  228  described in relation to  FIG. 6 , the sensor  328  may be a physical sensor, such as a switch, toggle, or button that senses the elongated member  302  via mechanical contact with the elongated member  302 . In other embodiments, the sensor  328  may be an optical sensor, such an infrared sensor, UV sensor, laser sensor, or other sensor that senses the elongated member  302  via interference between the elongated member  302  and an emitted signal. 
     In the depicted embodiment, the sensor  328  is depressed by the elongated member  302  when a force is applied to the elongated member  302  by a clip  334  of the light source  322 . The clip  334  may be movably connected to the light source  322  about a hinged connection  336 . The hinged connection  336  may be biased to close the clip  334  and/or hold the clip  334  closed against the light source  322 . The bias of the hinged connection  336  may apply a sufficient force through the clip  334  to compress the elongated member  302  against the sensor  328 . The bias of the hinged connection  336  may apply a sufficient force through the clip  334  to retain the light source  322  on the elongated member  302  when a user releases the light source  322 . In other words, the user may clip the light source  322  onto the elongated member  302  and the light source  322  may hang in place on the elongate member  302  without the user continuing to support the light source  322 . 
       FIG. 10A  illustrates a transverse cross-section of another embodiment of an IV infusion line assembly  400 . The elongated member  402  defines a conduit  418  through the center of the elongated member  402  and an optical member  404  is positioned in contact with an outer surface of the elongated member  402 . In some embodiments, the optical member  404  may be fixed to the outer surface of the elongated member  402 . In other embodiments, the optical member  404  may be slidable in a longitudinal direction relative to the elongated member  402 . In other word, the optical member  404  may be positioned circumferentially about the elongated member  402  but not fixed thereto. 
       FIG. 10B  illustrates a longitudinal cross-section of the embodiment of an IV infusion line assembly  400 . In such embodiments, the optical member  404  may terminate before the end of the elongated member  402  or the terminal end of the IV infusion line assembly  400  may be obscured or covered by medical equipment or the patient. In such embodiment, a light may be provided to the optical member  404  in a transverse direction through one or more diffraction optical elements such as an in-coupling grating  438  shown in  FIG. 10B . The in-coupling grating  438  includes a plurality of wedges or other lenses that refract light at an angle and allow the light to propagate within the optical member  404  in a longitudinal direction. 
     As described herein, the optical member and the elongated member may selectively separable to allow a user to detach at least a portion of the optical member from the elongated member.  FIG. 11  illustrates an embodiment of an IV infusion line assembly  500  in which the optical member  504  has been detached from the elongated member  502  and the elongated member  502  is directed through a filter  540 . The filter  540  is configured to filter the contents (i.e., therapeutic fluid) of the elongated member  502  while the optical member  504  continues around the filter  540  and rejoins the elongated member  502  on the opposing side of the filter  540 . 
       FIG. 12  illustrates an embodiment of an IV infusion line assembly  600  in which the optical member  604  has been detached from the elongated member  602  and the elongated member  602  is directed through a rotary pump  642 . The rotary pump  642  is configured to apply a force to the elongated member  602  to urge the contents (i.e., therapeutic fluid) of the elongated member  502  in the longitudinal direction. The optical member  604  continues around the rotary pump  642  and rejoins the elongated member  602  on the opposing side of the rotary pump  642 . 
     At least some of the embodiments of an IV infusion line described herein allow a user to illuminate the IV infusion line using a light source to identify a length of the IV infusion line in a clinical environment. The IV infusion line may be disposable, elongated member and optical member included, and used with conventional adapters and equipment. 
     The articles “a,” “an,” and “the” are intended to mean that there are one or more of the elements in the preceding descriptions. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. Additionally, it should be understood that references to “one embodiment” or “an embodiment” of the present disclosure are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. Numbers, percentages, ratios, or other values stated herein are intended to include that value, and also other values that are “about” or “approximately” the stated value, as would be appreciated by one of ordinary skill in the art encompassed by embodiments of the present disclosure. A stated value should therefore be interpreted broadly enough to encompass values that are at least close enough to the stated value to perform a desired function or achieve a desired result. The stated values include at least the variation to be expected in a suitable manufacturing or production process, and may include values that are within 5%, within 1%, within 0.1%, or within 0.01% of a stated value. 
     A person having ordinary skill in the art should realize in view of the present disclosure that equivalent constructions do not depart from the spirit and scope of the present disclosure, and that various changes, substitutions, and alterations may be made to embodiments disclosed herein without departing from the spirit and scope of the present disclosure. Equivalent constructions, including functional “means-plus-function” clauses are intended to cover the structures described herein as performing the recited function, including both structural equivalents that operate in the same manner, and equivalent structures that provide the same function. It is the express intention of the applicant not to invoke means-plus-function or other functional claiming for any claim except for those in which the words ‘means for’ appear together with an associated function. Each addition, deletion, and modification to the embodiments that falls within the meaning and scope of the claims is to be embraced by the claims. 
     The terms “approximately,” “about,” and “substantially” as used herein represent an amount close to the stated amount that still performs a desired function or achieves a desired result. For example, the terms “approximately,” “about,” and “substantially” may refer to an amount that is within 95% of, within 99% of, within 99.9% of, or within 99.99% of a stated amount. Further, it should be understood that any directions or reference frames in the preceding description are merely relative directions or movements. For example, any references to “up” and “down” or “above” or “below” are merely descriptive of the relative position or movement of the related elements. 
     Elements described in relation to any embodiment depicted and/or described herein may be substituted for or combined with elements described in relation to any other embodiment depicted and/or described herein. For example, any of the components or features described in relation to the light source  722  of  FIG. 7  may be substituted for or combined with any of the components or features described in relation to the IV infusion line assembly  200 , and vice versa. 
     The present invention may be embodied in other specific forms without departing from its spirit or characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.