Patent Publication Number: US-2019167898-A9

Title: Medical pump, medical pump system, and method for controlling medical pump system

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation and claims priority to and the benefit of, under 35 U.S.C. §119(e), PCT Application No. PCT/JP2016-053867, filed on Feb. 9, 2016, entitled “MEDICAL PUMP, MEDICAL PUMP SYSTEM, AND METHOD OF CONTROLING MEDICAL PUMP SYSTEM,” which claims priority to Japanese Patent Application No. 2015-065011, filed Mar. 26, 2015, entitled “MEDICAL PUMP, MEDICAL PUMP SYSTEM, AND METHOD OF CONTROLING MEDICAL PUMP SYSTEM,” the entire disclosures of each of these applications is incorporated herein by reference in their entirety, for all that they teach and for all purposes. 
    
    
     BACKGROUND 
     Technical Field 
     The present invention generally relates to a medical pump, a medical pump system, and a method for controlling the medical pump system and particularly relates to a medical pump, a medical pump system, and a method for controlling the medical pump system, for achieving continuous administration of a medicine using two medical pumps. 
     Background 
     In the medical field, medical pumps such as infusion pumps and syringe pumps are used as pumps for administering medicines into the body of a patient. Generally, these medical pumps have an upper limit on the amount of medicine that can be administered by one pump. Therefore, to administer the same type of medicine continuously and in large quantities to a patient, there is a commonly implemented method of preparing two medical pumps and operating these continuously (hereinafter referred to as “W method”). 
     In the medical pump for performing administration of a medicine by the W method, liquid delivery of a second pump (succeeding pump) is started slightly before the liquid delivery of a first pump (preceding pump) is finished, thereby avoiding a flow rate fluctuation due to delays in startup of the liquid delivery by the succeeding pump. At this time, the flow rate of each of the two pumps is changed stepwise (in steps) such that the flow rate of the succeeding pump is adjusted to the flow rate of a cooperation starting time point at the time point when the preceding pump completely finishes liquid delivery. It is assumed that the number of steps, the time interval of steps, and the flow rate (step flow rate) in each of the steps are stored as a W method table beforehand in each of the medical pumps in association with medicine information. For example, the W method may be as described in Japanese Patent Application JP 2013-192890 A, which is incorporated by reference for all that it teaches and for all purposes. 
     SUMMARY 
     Meanwhile, in continuous administration of the medicine with application of the above-mentioned W method, management of the flow rate medicine is extremely strict in some cases, leading to a demand for monitoring pump switching operation at the start of cooperative administration of simultaneously driving two pumps. However, in the above-described medical pump, switching operation of two pumps is automatically performed without user intervention. This automation makes it difficult, for the user, to grasp the period of time of execution of the switching operation of the two pumps, leading to a difficulty in efficiently monitoring the switching operation. 
     In view of the above, the embodiments herein are intended to provide a medical pump, a medical pump system, and a method for controlling the medical pump system capable of monitoring switching operation of pumps as necessary in a cooperative administration period of simultaneously driving two pumps in implementation of continuous administration of a medicine by two medical pumps. 
     A medical pump for achieving this intention can be a medical pump for achieving continuous administration of a medicine by performing sequential driving with another medical pump, the medical pump including: a pump driving unit for administering the medicine in accordance with a setting; a communication unit for performing communication between the other medical pump; a control unit for controlling individual driving of the pump driving unit and the communication unit; and an operation unit connected to the control unit, in which, in a single administration period by a first medical pump in the continuous administration of the medicine, the control unit judges a timing of starting cooperative administration of simultaneously driving the pump driving unit together with a pump driving unit of the other medical pump on the basis of the setting and on the basis of a manual input from the operation unit. 
     Moreover, the medical pump system may include two medical pumps for achieving continuous administration of a medicine by sequential driving; a control unit configured to control the continuous administration of the medicine by the two medical pumps; and an operation unit connected to the control unit, in which each of the medical pumps includes: a pump driving unit for administering a medicine in accordance with a setting; and a communication unit for performing communication with the outside, and the control unit judges, in a single administration period by a first medical pump among the second medical pumps, a timing of starting cooperative administration of simultaneously driving the pump driving units of the two medical pumps on the basis of the setting and on the basis of a manual input from the operation unit. 
     Furthermore, a method for controlling a medical pump system can be a method for controlling a medical pump system configured to achieve continuous administration of a medicine by sequentially driving two medical pumps on the basis of a setting, in which a timing of starting cooperative administration of simultaneously driving the pump driving units of the two medical pumps during a single administration period of a first medical pump among the two medical pumps is judged in accordance with the setting and in accordance with an arbitrary input from the outside. 
     According to an embodiment, it is possible to arbitrarily start cooperative administration of simultaneously driving two pumps by the setting and the input by a medical practitioner, an administrator, or the like, being qualified to operate the medical pump, leading to achieving efficient monitoring of the switching operation of the two pumps. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a diagram illustrating a configuration of a medical pump and a medical pump system according to embodiments presented herein; 
         FIG. 2  is a front view of a medical pump according to embodiments presented herein; 
         FIG. 3  is a diagram for illustrating continuous administration of a medicine according to embodiments presented herein; 
         FIG. 4  is a diagram illustrating a display screen of start information of cooperative administration of simultaneously driving two medical pumps according to embodiments presented herein; 
         FIG. 5  is a flowchart (preceding pump side) for illustrating continuous administration of a medicine in a medical pump and a medical pump system according to embodiments presented herein; and 
         FIG. 6  is a flowchart (succeeding pump side) for illustrating continuous administration of a medicine in a medical pump and a medical pump system according to embodiments presented herein. 
     
    
    
     DETAILED DESCRIPTION 
     Embodiments related to a medical pump, a medical pump system, and a method for controlling the medical pump system according to embodiments presented herein will be described in detail below with reference to the drawings. 
       FIG. 1  is a diagram illustrating a configuration of a medical pump  1  and a medical pump system  2  according to embodiments presented herein, and  FIG. 2  is a front view of the medical pump  1  according to embodiments presented herein. The medical pump  1  and the medical pump system  2  illustrated in the figures are provided for achieving continuous administration of a medicine using two medical pumps  1 . Prior to describing the details of the configuration of the medical pump  1  and the medical pump system  2 , details of continuous administration of a medicine will be described. 
     &lt;&lt;Continuous Administration of Medicine&gt;&gt; 
     Herein, continuous administration of a medicine is a medicine administration method of sequentially driving two medical pumps  1 , namely, a preceding pump  1   a  driven as a first pump, and a succeeding pump  1   b  driven as a second pump. Note that the continuous administration of the medicine in this context in particular represents continuous administration using a W method, that is, a method having a period of “cooperative administration” of simultaneously driving two pumps in cooperation at the time of switching between the preceding pump  1   a  and the succeeding pump  1   b.    
       FIG. 3  is a diagram for illustrating continuous administration of a medicine with application of this W method, including graphs indicating chronological states of a flow rate  100   a  of the preceding pump  1   a , a flow rate  100   b  of the succeeding pump  1   b , and a total flow rate  100   ab  thereof. 
     As illustrated in the figures, in a period Ta immediately after the start of administration in the continuous administration of the medicine with application of the W method, the flow rate  100   a  of the preceding pump  1   a  is a reference flow rate [V0] the flow rate  100   b  of the succeeding pump  1   b  is [0], and the total flow rate  100   ab  is the reference flow rate [V0]. This period Ta is a period of driving the preceding pump  1   a  alone, and this period corresponds to the period Ta for the preceding single administration. While the flow rate  100   a  of the preceding pump  1   a  during the period Ta for the preceding single administration need not be constant, the value of the flow rate  100   a  immediately before the start of the next period is the reference flow rate [V0]. 
     In the period Tab next to the period Ta for the preceding single administration, the flow rate  100   a  of the preceding pump  1   a  decreases stepwise while the flow rate  100   b  of the succeeding pump  1   b  increases stepwise, and the total flow rate  100   ab  is maintained at the reference flow rate [V0]. This period Tab is a period of simultaneously driving the preceding pump  1   a  and the succeeding pump  1   b , and this period corresponds to the period Tab for cooperative administration. Note that, herein, the start time of the period Tab for cooperative administration is defined as a cooperation start time Ts, and the end time of the period Tab for cooperative administration is defined as a cooperation end time Tf. 
     In the period Tb, next to the cooperative administration period Tab, the flow rate  100   a  of the preceding pump  1   a  is [0], the flow rate  100   b  of the succeeding pump  1   b  is the reference flow rate [V0], and the total flow rate  100   ab  is the reference flow rate [V0]. This period is a period of driving the succeeding pump  1   b  alone, and herein this period corresponds to the period Tb for succeeding single administration. 
     Continuous administration of the medicine with application of the W method as described above makes it possible to suppress the flow rate fluctuation due to a delay in startup of the succeeding pump  1   b  at the time of switching the drive from the preceding pump  1   a  to the succeeding pump  1   b , leading to achievement of continuous administration of the medicine at a stable flow rate. 
     &lt;&lt;Medical Pump  1  and Medical Pump System  2 &gt;&gt; 
     Each of the medical pumps  1  provided for achieving continuous administration of a medicine with application of the W method as described above is, for example, an infusion pump or a syringe pump as illustrated and includes a pump driving unit  11 , an operation unit  13 , a display unit  15 , a storage unit  17 , a communication unit  19 , and a control unit  21 . Details of these components are as follows. 
     [Pump Driving Unit  11 ] 
     The pump driving unit  11  is a portion driven for administration of medicine in accordance with the setting, and in a case where the medical pump  1  is a syringe pump, this portion corresponds to a portion that drives a syringe. In a case where the medical pump  1  is an infusion pump, this portion corresponds to a driving portion for discharging an infusion liquid in an infusion tube connected to an infusion bag. 
     [Operation Unit  13 ] 
     The operation unit  13  includes, for example, a power operation unit, an operation unit for starting pump operation, a display switching unit for the display unit  15 , and a setting operation unit for operating various settings. With a manual input from this operation unit  13 , driving states of the pump driving unit  11  and display details of the display unit  15  are operated, and selection is performed from an optional image displayed on the display unit  15 . The operation unit  13  may be a touch panel provided on the display unit  15 . 
     [Display Unit  15 ] 
     The display unit  15  is provided as an information transmission unit that transmits pump information, represented by a display panel, such as a liquid crystal display panel or an organic EL display panel, for example. The display unit  15  displays various types of information in accordance with an instruction from the control unit  21  or a manual input from the operation unit  13 . Examples of the information displayed, as illustrated in  FIG. 4 , include start information for starting cooperative administration in continuous administration of medicine and scheduled time based on settings up to the cooperation start time Ts at which cooperative administration is started. 
     [Storage Unit  17 ] 
     The storage unit  17  stores medicine information related to various medicines administered by the medical pump  1 . Herein, in particular, it is assumed that settings related to continuous administration of a medicine with application of the W method are stored in association with medicine information, as a W method table. With reference to  FIG. 3 , the settings related to continuous administration include (1) the number of stages (e.g., the number of steps) for flow rate change (herein, four stages, for example), (2) the period (time period) of each of the stages (e.g., step duration), (3) flow rate  100   a  of the preceding pump  1   a  and flow rate  100   b  of the succeeding pump  1   b  at each of the stages (or steps), in the period Tab of cooperative administration. 
     Note that (3) flow rate  100   a  of the preceding pump  1   a  and flow rate  100   b  of the succeeding pump  1   b  at each of the stages (or steps) may be set as a ratio to the reference flow rate [V0] being 100%. 
     [Communication Unit  19 ] 
     The communication unit  19  is provided for achieving communication between the medical pumps  1  used in the medical pump system  2  and includes a function of transmitting and receiving with infrared rays, for example. The communication unit  19  may also include a communication module function for establishing communication between these medical pumps  1  in a case where two medical pumps  1  for performing continuous administration of a medicine are arranged adjacent to each other. 
     [Control Unit  21 ] 
     The control unit  21  is connected to each of the pump driving units  11 , the operation unit  13 , the display unit  15 , the storage unit  17 , and the communication unit  19 , and functions as a calculation unit for controlling the drive of the pump driving unit  11 , the display unit  15 , and the communication unit  19  in accordance with a preset program and operation on the operation unit  13 . The control unit  21  is a portion for achieving continuous administration of the medicine with application of the W method and is a portion configured to judge the timing of starting cooperative administration and execute programs for controlling the driving of the pump driving unit  11  of each of the medical pumps  1 . The above-configured control unit  21  includes, for example, a central processing unit (CPU), a random access memory (RAM), and a read only memory (ROM), not being illustrated here. Next, details of continuous administration of a medicine with application of the W method, to be processed, judged and executed by the control unit  21  will be described. 
     &lt;&lt;Control Method of Medical Pump System  2 &gt;&gt; 
       FIGS. 5 and 6  are flowcharts for illustrating a method for controlling the medical pump system  2  performed by the control unit  21  of the medical pump  1  described above, illustrating a control procedure for achieving continuous administration of a medicine with application of the W method. Among the figures,  FIG. 5  relates to the preceding pump  1   a , and  FIG. 6  relates to the succeeding pump  1   b . These process flows may be implemented by execution of programs, stored in the ROM and RAM, by the CPU constituting each of the control units  21  of the preceding pump  1   a  and the succeeding pump  1   b . Hereinafter, a procedure for controlling the medical pump system  2  performed by the control unit  21  of each of the medical pumps  1  will be described in accordance with the flowcharts of  FIGS. 5 and 6  with reference to  FIGS. 1 to 4 . 
     First, it is assumed that, as a preliminary stage of executing continuous administration of a medicine, the process of establishing communication between two medical pumps  1  used for continuous administration, and the process of setting one of the two as the preceding pump  1   a  and the other as the succeeding pump  1   b  have been performed. The processing may be performed as ordinary processing disclosed in the above-mentioned known documents, without a procedure thereof being limited. The two medical pumps  1  may have a same configuration, and any of the medical pumps  1  can either be set as the preceding pump  1   a  or the succeeding pump  1   b.    
     [Step S 11  (Preceding Pump  1   a :  FIG. 5 )] 
     First, in step S 11 , a medical practitioner, an administrator, or the like, being qualified to operate the medical pump system  2 , inputs settings related to continuous administration of a medicine by operating the preceding pump  1   a -side operation unit  13 . The settings to be input are (a) medicine information and (b) administration dose, regarding continuous administration, and these settings are input by selection with operation on the operation unit  13 . 
     [Step S 101  (Preceding Pump  1   a :  FIG. 5 )] 
     In step S 101 , the preceding pump  1   a -side control unit  21  performs a setting process of continuous administration of a medicine with application of the W method. At this point, the control unit  21  reads the setting related to continuous administration corresponding to (a) medicine information selected in step S 11 , from the W method table stored in each of the storage units  17 . The settings read at this point include one or more of, but is not limited to: (1) the number of stages for flow rate change (herein, four stages, for example), (2) the period (time period) of each of the stages (3) flow rate  100   a  of the preceding pump  1   a  at each of the stages, in the period Tab of cooperative administration, as described above. 
     In particular, the control unit  21  of the preceding pump  1   a  calculates the cooperation start time Ts and the cooperation end time Tf illustrated in  FIG. 3  on the basis of (2) the period (time period) of each of the stages that has been read and (b) administration dose set in step S 11 . With this configuration, as illustrated in  FIG. 3 , the control unit  21  of the preceding pump  1   a  sets a driving sequence of the pump driving unit  11  in continuous administration of the medicine to achieve medicine administration with the flow rate  100   a  being changed chronologically. 
     [Step S 21  (Succeeding Pump  1   b :  FIG. 6 )] 
     In step S 21 , similarly to step S 11 , a medical practitioner, an administrator, or the like, being qualified to operate the medical pump system  2 , inputs settings related to medicine administration by inputting from the succeeding pump  1   b -side operation unit  13 . The settings to be input are one or more of, but are not limited to: (a) medicine information and (b) administration dose, regarding continuous administration, and these settings are input by selection with operation on the operation unit  13 . 
     [Step S 201  (Succeeding Pump  1   b :  FIG. 6 )] 
     In step S 201 , similarly to step S 101  performed by the preceding pump  1   a -side control unit  21 , the succeeding pump  1   b -side control unit  21  performs a setting process of continuous administration of a medicine with application of the W method. Note that, as illustrated in  FIG. 3 , the control unit  21  of the succeeding pump  1   b  sets a driving sequence of the pump driving unit  11  in continuous administration of the medicine on and after the cooperation start time Ts so as to achieve medicine administration with the flow rate  100   b  being changed chronologically. 
     [Step S 202  (Succeeding Pump  1   b :  FIG. 6 )] 
     Next, in step S 202 , the succeeding pump  1   b -side control unit  21  causes the communication unit  19  to transmit (a) the medicine information input in step S 21  toward the preceding pump  1   a  side. 
     [Step S 102  (Preceding Pump  1   a :  FIG. 5 )] 
     In step S 102 , on the basis of the medicine information transmitted from the succeeding pump  1   b  and the medicine information input in step S 11 , the preceding pump  1   a -side control unit  21  performs cooperation availability judgment processing for judging whether cooperation with the succeeding pump  1   b  is available. Herein, it is judged whether the medicine information transmitted from the succeeding pump  1   b  matches with the medicine information set for the preceding pump  1   a , and in a case where there is a match, a process of judging that cooperation is available is performed. Subsequently, in a case where it is judged that cooperation is available, the control unit  21  displays a message, to the effect that cooperation is available, to the display unit  15  and causes the communication unit  19  to notify the succeeding pump  1   b  side of the message that cooperation is available. 
     In contrast, in a case where it is judged that cooperation is not available, continuous administration of the medicine is stopped. 
     [Step S 203  (Succeeding Pump  1   b :  FIG. 6 )] 
     In step S 203 , the succeeding pump  1   b -side control unit  21  starts the cooperative administration processing of the medicine upon receiving the transmission of the message that cooperation is available from the preceding pump  1   a  side by the communication unit  19 . 
     [Step S 204  (Succeeding Pump  1   b :  FIG. 6 )] 
     In step S 204 , the succeeding pump  1   b -side control unit  21  waits for reception of the cooperation start message transmitted from the preceding pump  1   a  side and repeats a judgment of a presence/absence of the reception of cooperation start until the judgment of presence of reception (Yes) is performed. 
     [Step S 12  (Preceding Pump  1   a :  FIG. 5 )] 
     Meanwhile, in step S 12 , after confirming the cooperation available display on the preceding pump  1   a -side display unit  15 , the medical practitioner, the administrator, or the like, being qualified to operate the medical pump system  2 , performs input of administration start by operating the operation unit  13  manually. Herein, for example, continuous administration of the medicine is started by pressing the administration start button on the operation unit  13 . 
     [Step S 103  (Preceding Pump  1   a :  FIG. 5 )] 
     Next, in step S 103 , in response to the input of the administration start, the preceding pump  1   a -side control unit  21  drives the pump driving unit  11  in accordance with the driving sequence set in step S 101 . With this operation, single administration for the preceding single administration period Ta, illustrated in  FIG. 3 , is started. 
     [Step S 104  (Preceding Pump  1   a :  FIG. 5 )] 
     Thereafter, in step S 104 , the preceding pump  1   a -side control unit  21  judges whether it is the time of the cooperation start time Ts for starting cooperative administration. Herein, e preceding pump  1   a -side control unit  21  judges whether the time from the time point when single administration is started, in step S 103 , has reached the cooperation start time Ts, set by the setting processing and calculation in step S 101 , and in a case where it is judged the time has reached the cooperation start time Ts (Yes), processing proceeds to step S 105 . In contrast, in a case where it is determined that the cooperation start time Ts has not been reached (No), the processing proceeds to step S 106 . 
     [Step S 105  (Preceding Pump  1   a :  FIG. 5 )] 
     In step S 105 , the preceding pump  1   a -side control unit  21  causes the communication unit  19  to transmit a message to start cooperative administration to the succeeding pump  1   b  side. 
     [Step S 106  (Preceding Pump  1   a :  FIG. 5 )] 
     In contrast, in step S 106 , the preceding pump  1   a -side control unit  21  causes the display unit  15  to display the scheduled time until the cooperation start time Ts and to display the start information for starting the cooperative administration as illustrated in  FIG. 4 . As illustrated in the figures, herein, this start information is a start selection button to select whether to start cooperative administration from now (“YES” or “NO”). 
     [Step S 13  (Preceding Pump  1   a :  FIG. 5 )] 
     Thereafter, in step S 13 , after confirming the display on the preceding pump  1   a -side display unit  15 , the medical practitioner, the administrator, or the like, being qualified to operate the medical pump system  2  performs input of cooperative administration start by manually operating the operation unit  13  as necessary. At this point, the scheduled time before the cooperation start time Ts still remains (for example, 10 minutes). In a case, however, where it is desired to start the cooperative administration by simultaneously driving the preceding pump  1   a  and the succeeding pump  1   b  without waiting for the start time, selection and input of “Yes” among the selection information displayed on the display unit  15  is performed by operation on the operation unit  13 . 
     [Step S 107  (Preceding Pump  1   a :  FIG. 5 )] 
     In step S 107 , the preceding pump  1   a -side control unit  21  judges whether an input of cooperative administration start has been performed. In a case where it is judged that the input of cooperative administration start has been performed (Yes), processing proceeds to step S 105 , and the communication unit  19  is made to transmit a message of starting cooperative administration to the succeeding pump  1   b  side. In contrast, in a case where it is judged that the input of cooperative administration start has not been performed (No), processing returns to the previous step S 104 , and thereafter the step  104  and the steps after step S 104  are repeated. 
     [Step S 108  (Preceding Pump  1   a :  FIG. 5 )] 
     In step S 108 , in response to transmission of the message of starting cooperative administration to the succeeding pump  1   b  side in the previous step S 105 , the control unit  21  of the preceding pump  1   a  starts the cooperative administration of simultaneously driving the preceding pump  1   a  and the succeeding pump  1   b  after the cooperation start time Ts illustrated in  FIG. 3 . Then, the drive of the pump driving unit  11  is switched in accordance with the set sequence such that medicine administration is performed at the flow rate  100   a  set in the cooperation period Tab illustrated in  FIG. 3 , and cooperative administration of medicines is performed, and then, the cooperative administration is finished at the cooperation end time Tf. 
     [Step S 109  (Preceding Pump  1   a :  FIG. 5 )] 
     In step S 109 , when the cooperation period Tab, illustrated in  FIG. 3  is finished, the control unit  21  of the preceding pump  1   a  causes the display unit  15  to display a warning of the end of medicine administration. Moreover, in a case where the preceding pump  1   a  includes an alarm sound generator, it is allowable to cause the alarm sound to be generated. 
     [Step S 14  (Preceding Pump  1   a :  FIG. 5 )] 
     In step S 14 , a medical practitioner, an administrator, or the like, being qualified to operate the medical pump system  2 , confirms the display of the end of medicine administration on the preceding pump  1   a -side display unit  15 , and then, performs an input of stopping the pump by operation on the operation unit  13 . With this operation, continuous administration of the medicine on the side of the preceding pump  1   a  is finished. 
     [Step S 205  (Succeeding Pump  1   b :  FIG. 6 )] 
     Meanwhile, upon judgment of receiving (Yes) the signal of the cooperative administration start from the preceding pump  1   a  (Yes) at the preceding step S 204 , the succeeding pump  1   b -side control unit  21  starts, in step S 205 , cooperative administration of simultaneously driving the preceding pump  1   a  and the succeeding pump  1   b  after the cooperation start time Ts illustrated in  FIG. 3 . Then, the drive of the pump driving unit  11  is switched in accordance with the set sequence such that medicine administration is performed at the flow rate  100   b  set in the cooperation period Tab illustrated in  FIG. 3 , and cooperative administration of medicines is performed, and then, the cooperative administration is finished at the cooperation end time Tf. 
     Note that the cooperative administration is started in synchronization with the start of cooperative administration in step S 108  in the preceding pump  1   a  illustrated in  FIG. 5 . 
     [Step S 206  (Succeeding Pump  1   b :  FIG. 6 )] 
     Next, in step S 206 , the succeeding pump  1   b -side control unit  21  starts single administration of a medicine by driving the pump driving unit  11  such that the medicine is administered at the flow rate  100   b  set in the period Tb of the succeeding single administration illustrated in  FIG. 3 , and finishes the administration in accordance with the setting. 
     [Step S 207  (Succeeding Pump  1   b :  FIG. 6 )] 
     In step S 207 , the control unit  21  of the succeeding pump  1   b  causes the display unit  15  to display a warning of the completion of medicine administration when the period Tb of the succeeding single administration illustrated in  FIG. 3  has finished. Moreover, when the succeeding pump  1   b  includes an alarm sound generator, it is allowable to cause the alarm sound to be generated. 
     [Step S 22  (Succeeding Pump  1   b :  FIG. 6 )] 
     Thereafter, in step S 22 , the medical practitioner, the administrator, or the like, being qualified to operate the medical pump system  2  confirms the display of the end of medicine administration on the succeeding pump  1   b -side display unit  15 , and then, performs an input of stopping the pump by operation on the operation unit  13 . With this operation, continuous administration of the medicine on the side of the succeeding pump  1   b  is finished. 
     Effect of Embodiment 
     In the above-described embodiments, in performing continuous administration of the medicine with application of the W method under the control of the control unit  21  of the preceding pump  1   a , cooperative administration of simultaneously driving two medical pumps  1  can be arbitrarily started by an input on the operation unit  13  manually. Therefore, it is possible to efficiently monitor the switching operation of the pump in the cooperative administration period Tab by arbitrarily starting cooperative administration on the spot without waiting for the preset cooperation start time Ts. 
     Moreover, since the scheduled time until the cooperation start time Ts is configured to be displayed on the display unit  15 , the administrator of the medical pump system  2  can easily judge whether to start cooperative administration without waiting for the cooperation start time Ts. Therefore, in a case where the scheduled time until the cooperation start time Ts is short, it is possible to make a judgment of waiting until the cooperation start time Ts is reached without starting cooperative administration arbitrarily and then starting cooperative administration at the cooperation start time Ts following the setting while monitoring the switching operation of the pump. This makes it possible to monitor the switching operation of the pump in the cooperative administration period Tab without stress and to administer wastelessly the medicine of the preceding pump  1   a.    
     Note that the present invention is not limited to the embodiments and modifications described above and illustrated in the drawings, and various modifications can be made without departing from the scope and spirit of the appended claims. For example, while in the above-described embodiments, the cooperative administration is started by the input from the preceding pump  1   a  side, it is also allowable to configure such that cooperative administration is started by the input from the succeeding pump  1   b  side. 
     Furthermore, continuous administration may be performed by replacing the succeeding pump  1   b  during the drive with the preceding pump  1   a  and using the additional medical pump  1  as the succeeding pump  1   b . This continuous administration processing is started by operation, by the administrator of the medical pump system  2 , of the operation unit  13  of the succeeding pump  1   b  and the operation unit  13  of an additional medical pump  1  during single administration of the succeeding pump  1   b  in step S 206  of  FIG. 6  (during the succeeding single period Tb illustrated in  FIG. 3 ). 
     In this case, each of the control units  21  first establishes communication between the succeeding pump  1   b  and the additional medical pump  1 , and performs setting processing for replacing the succeeding pump  1   b  with the preceding pump  1   a  and setting the additional medical pump  1  to be the succeeding pump  1   b . Thereafter, processing with a procedure similar to the procedure described with reference to  FIGS. 5 and 6  is performed on the newly set preceding pump  1   a  and the succeeding pump  1   b . This makes it possible to continue continuous administration of the medicine with application of the W method by using a third and subsequent medical pumps  1 . 
     In the above-described embodiments, the medical pump system  2  has been described to have a configuration in which two medical pumps  1  can communicate with each other. Alternatively, the medical pump system according to the present invention may be configured such that two medical pumps  1  can mutually perform transmission and reception via a system control unit such as a host computer or via a communication unit of a pump stand to which a plurality of medical pumps  1  are attached. In this case, the above-described method for controlling the medical pump system is not limited to the configuration implemented by the control unit  21  of each of the medical pumps  1 , but may be a configuration implemented by an instruction from a system control unit or from a communication unit connected to the communication unit of the pump stand.