JP2011019563A - Chemical administration apparatus - Google Patents

Abstract

A drug administration device having a portable pump unit is realized.
A drug solution administration apparatus 1 includes a tube 50 having flexibility to communicate with a reservoir 60 that stores a drug solution, a cam 20, and a plurality of fingers 40 to 46 that are arranged radially from the rotation center P direction of the cam 20. The pump unit 10 includes: a pump unit 10 that moves the fingers 50 to 46 back and forth by the cam 20 and transports the chemical solution by repeatedly closing and releasing the tube 50 from the upstream side toward the downstream side; And a controller 200 for inputting the chemical solution administration control information, and the pump drive unit 11 is driven and controlled based on the chemical solution administration control information.
[Selection] Figure 1

Description

  The present invention relates to a chemical liquid administration device having a pump unit and a controller that inputs chemical liquid administration control information to the pump unit.

  Conventionally, when a drug solution is administered continuously or several times a day, such as administration of narcotic analgesics for pain relief such as cancer diseases or insulin administration for diabetes, a drug solution is applied to the silicon balloon. Disposable-type chemical liquid administration devices that are filled are often used.

  However, in the medical field that requires continuous administration of these drug solutions, the drug solution dose (including the administration rate and rest time) can be adjusted more finely and more accurately to enhance the effect of drug administration and improve safety. There is a need for a chemical administration device that uses a small pump in order to increase it.

  As a drug solution administration device using a small pump, a peristaltic drive type pump device having a motor module and a pump module has been proposed (for example, see Patent Document 1).

Japanese Patent No. 3177742

  In such a pump device according to Patent Document 1, once a drug solution dose (including a dose rate) is set, the pump device to be driven cannot arbitrarily change the drug solution dose. Therefore, there has been a problem that the amount of drug solution, the administration rate, etc. cannot be changed according to the condition of the patient.

  In addition, the administration route of the chemical solution is assumed to be intravenous administration, subcutaneous administration, etc., but there are various chemical solution injection positions, and the mounting position of the pump device is limited because there is no mounting means having the flexibility. It can be inferred that patient behavior is limited.

  Further, in the peristaltic pump device, when the chemical solution in the reservoir is reduced, the internal pressure inside the reservoir is required to be approximately equal to the atmospheric pressure, and therefore the reservoir is formed of a flexible material. However, when the reservoir is attached to the human body alone, it is conceivable that fluctuations in the discharge amount of the chemical solution occur due to the internal pressure rising due to the compression of the reservoir from the outside.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A drug solution administration device according to this application example includes a flexible tube communicating with a reservoir for storing a drug solution, a cam, and a plurality of fingers arranged radially from the rotation center direction of the cam. A pump unit including a pump drive unit, wherein the plurality of fingers are advanced and retracted by the cam, and the tube is transported by repeatedly closing and releasing the tube from the upstream side toward the downstream side, and the chemical solution administration control to the pump unit And a controller for inputting information, wherein the pump drive unit is driven and controlled based on the drug solution administration control information.

Since the chemical solution administration device according to this application example includes a controller that inputs chemical solution administration control information, the drive of the pump drive unit is controlled by arbitrarily changing the chemical administration control information according to the patient's condition. Thus, an appropriate drug solution can be administered.
The drug solution administration information includes, for example, a drug solution dose, a drug solution administration rate, and the like.

  Further, since the drug solution administration speed is determined by the rotational speed of the cam, and the drug solution dosage is determined by the drug solution administration speed and the administration time, the drug solution dosage and the drug solution administration speed can be accurately controlled.

  Furthermore, the pump unit and the controller are separated, and the medication administration control information can be set only by the doctor using the controller. Safety can be improved because the patient himself cannot change it.

Application Example 2 In the chemical solution administration device according to the application example described above, it is preferable that the controller includes a display unit that displays at least the chemical solution administration control information.
Here, the display unit is, for example, a liquid crystal display, and more preferably a color display.

  In this way, by displaying the chemical liquid administration control information, the doctor confirms the information at the start of the chemical liquid administration, and what kind of chemical liquid administration control information the pump unit drives during the chemical liquid administration. Can be confirmed and safety can be further improved.

Application Example 3 In the chemical solution administration device according to the application example described above, it is preferable that the controller and the pump unit have communication means for inputting and outputting the chemical solution administration control information.
As the communication means, non-contact or wired communication means such as infrared communication (IrDA), radio communication using radio waves, and USB (Universal Serial Bus) can be adopted.

  If the non-contact communication means is employed, the controller can input drug solution administration control information to the pump unit in the same manner as a general remote controller. Further, if USB is used, the reliability of communication can be improved.

  Furthermore, if the pump unit is also provided with transmission means, it becomes possible to transmit the drive state such as the cam rotation speed and drive elapsed time of the pump unit to the controller, and the doctor can check the drive state of the pump unit at any time. .

  Application Example 4 In the drug solution administration device according to the application example described above, it is preferable that the reservoir is provided in the pump unit with respect to the pump drive unit.

  In a pump unit that discharges chemical liquid by closing and opening the tube, when the chemical liquid in the reservoir decreases, the internal pressure inside the reservoir is required to be almost equal to the atmospheric pressure, so the reservoir is flexible. It is formed with the material which has. However, when the reservoir is mounted on a human body alone, the chemical discharge amount may be changed due to the internal pressure rising due to the compression of the reservoir from the outside. Therefore, by arranging the reservoir in the pump unit (specifically, in the housing), it is possible to eliminate fluctuations in the discharge amount of the chemical solution due to an external artificial pressure increase.

  Application Example 5 In the chemical solution administration device according to the application example described above, it is preferable that the pump unit includes an attachment unit that suspends or attaches to a part of a human body or a part of a nearby device.

  The administration route of the chemical solution is assumed to be intravenous administration, subcutaneous administration, or the like, but there are various drug solution injection positions. Therefore, by providing the pump unit with attachment means such as a hanging strap (strap) or a band, the installation position of the pump unit is not limited, and the degree of freedom of action with the pump unit attached (carrying) is increased. Can do.

Application Example 6 In the chemical liquid administration device according to the application example described above, it is desirable that a holder for detachably holding the pump unit and / or the controller is further provided.
Here, examples of the holder include a desk-mounted type and a pole-mounted type.

  Thus, by providing a holder and having a configuration capable of holding either the pump unit or the controller, or one of them, it is possible to administer the drug solution while the pump unit is placed on the holder. This is particularly convenient when the dose of the drug solution (capacity of the reservoir) is large and it is difficult to attach the pump unit to the human body, or when the reservoir is separated from the pump unit.

Application Example 7 In the chemical solution administration device according to the application example described above, it is preferable that the pump unit has an alarm unit for notifying abnormality of the pump drive unit.
The alarm means includes a lamp display and a buzzer.

  By providing such a warning means, if the pump drive stops during drug administration or the cam deviates from the specified rotation speed, the patient or the medical staff will be notified and the abnormality will be corrected. Can do.

  In addition, when an alarm means starts, if it inputs to a controller with a wireless communication means from a pump unit, it can alert | report to the doctor and medical staff who left | separated, and improves safety | security further.

  Application Example 8 In the chemical liquid administration device according to the application example, the pump unit includes a pump drive unit including the pump drive unit and a reservoir unit including the reservoir, and the pump drive unit and the reservoir unit When the reservoir unit is attached to the pump drive unit, it is desirable that the reservoir and the tube communicate with each other.

  That is, if the reservoir unit is a cassette type and a plurality of reservoir capacities are prepared, the total amount of drug solution can be changed by replacing the reservoir unit with a common pump drive unit. In this way, there is no need to configure a pump unit for each capacity of the reservoir, so that it is possible to improve the economy.

  Application Example 9 In the chemical solution administration device according to the application example described above, it is preferable that a pump drive unit holder for holding the pump unit is further provided.

  If the reservoir unit is attached to the pump drive unit and integrated as a pump unit and is attached to the pump drive unit holder, the reservoir unit and the pump drive unit can be prevented from being separated during use.

Application Example 10 In the chemical solution administration device according to the application example, it is desirable that the pump unit has a bolus function.
Here, the bolus function means a function that allows a patient to administer a drug solution by himself / herself when the drug solution is a pain alleviating agent.

  By providing the bolus function in this way, the patient can have a self-regulated analgesia (PCA). Therefore, when it has a bolus function, the drug administration control information includes a bolus dose, a lockout interval, and the like.

BRIEF DESCRIPTION OF THE DRAWINGS Front explanatory drawing which shows schematic structure of the chemical | medical solution administration apparatus which concerns on Embodiment 1. FIG. FIG. 3 is a cross-sectional view illustrating a schematic structure of a pump unit according to the first embodiment. FIG. 3 is a cross-sectional view illustrating a schematic structure of a controller according to the first embodiment. The holding | maintenance state of the pump unit and controller by the holder which concerns on Embodiment 1 is shown, The perspective view of Example 1, (b) is a front view of Example 2. FIG. 1 is a system configuration explanatory diagram of a drug solution administration device according to Embodiment 1. FIG. FIG. 2 is a planar functional configuration diagram illustrating a pump unit according to the first embodiment. The fragmentary sectional view which shows the cut surface of APA of FIG. The pump unit which concerns on Embodiment 2 is shown, (a) is a plane block diagram, (b) is a cross-sectional block diagram. The pump unit which concerns on Embodiment 3 is shown, (a) is mounting explanatory drawing, (b) is a top view which shows a pump unit holder. The perspective view which shows the mounting means of the pump unit which concerns on Embodiment 4. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the drawings referred to in the following description are schematic views in which the vertical and horizontal scales of members or portions are different from actual ones for convenience of illustration.
(Embodiment 1)

  FIG. 1 is a front explanatory view showing a schematic configuration of a drug solution administration apparatus according to Embodiment 1, FIG. 2 is a cross-sectional view showing a schematic configuration of a pump unit, and FIG. 3 is a cross-sectional view showing a schematic configuration of a controller 200. As shown in FIG. 1, the chemical solution administration device 1 includes a pump unit 10 that transports a chemical solution and a controller 200 that inputs chemical solution administration control information to the pump unit 10.

  First, the configuration of the pump unit 10 will be described. 1 and 2, the pump unit 10 is configured by housing a pump drive unit 11 including a mechanism unit for transporting a chemical solution and a reservoir 60 for storing the chemical solution in a casing. The pump drive unit 11 and the reservoir 60 are connected by a flexible tube 50.

  A septum 80 as a chemical solution injection unit is disposed at the outer end of the reservoir 60 so as to penetrate the housing, and a chemical solution is injected into the reservoir 60 (including initial injection and replenishment injection) and sealed. Be prepared to do.

  In addition, above the pump drive unit 11, when it is detected that the ON / OFF switch 12 that controls the drive / stop of the pump drive unit 11, the bolus switch 13, and the drive of the pump drive unit 11 is abnormal, the patient A lamp 14 is provided as a warning means for notifying the user or medical staff. The alarm means may be an alarm device such as a buzzer in addition to the lamp.

  The bolus switch 13 is provided in the case where the drug solution is a narcotic analgesic such as morphine or fentanyl for pain relief, and allows the patient himself to selectively administer the drug solution.

  The ON / OFF switch 12, the bolus switch 13, the lamp 14, and the drive control unit 100 (see FIG. 5) are connected and fixed to the circuit board 121. A button-type or coin-type battery 120 is disposed between the pump drive unit 11 and the lower case 15.

  Here, the lower case 15 may be provided with a battery lid (not shown) for making the battery 120 detachable, or may be a rechargeable secondary battery. When the secondary battery is employed, the drive control unit 100 includes a charge control circuit.

  The housing includes a lower case 15 and an upper case 16, and a window member 81 is provided in the upper case 16 so that the reservoir 60 can be visually recognized from the outside. Suspension string attachment portions 91 and 92 are formed at outer ends of both side surfaces of the upper case 16 (or the lower case 15), and a suspension string (strap) 90 is connected thereto.

  In addition, the chemical | medical solution capacity | capacitance of the reservoir 60 illustrated in this embodiment is 10 ml, and the volume of the pump unit 10 is about 9 ml. Therefore, the volume of the pump unit 10 can be reduced to about 30 ml.

  The distal end portion of the tube 50 is connected to a insertion member 56 (not shown) for injecting a medical solution into the living body. The administration route of the chemical solution is assumed to be intravenous administration, subcutaneous administration, etc., but the injection location of the chemical solution is various, and the insertion member 56 is selected for use according to the administration route. The needle insertion mechanism is detachable.

  Next, the configuration of the controller 200 will be described with reference to FIGS. The controller 200 includes a display unit 220 that displays drug administration control information, a control unit 211 that performs drive control of the display unit 220, and a battery 120 as a power source. It is housed and configured inside.

  As the display unit 220, it is more preferable to adopt a liquid crystal display for reasons such as low current consumption, reduction in thickness, large display capacity, and provision of a touch switch. In addition, it is desirable that the liquid crystal display is a color display capable of displaying information to which attention should be paid by color. A window member 203 is bonded and fixed to the upper case 201 on the outer surface side of the display unit 220. The control unit 211 and the display unit 220 are connected and fixed to both the front and back surfaces of the circuit board 210, respectively. The circuit board 210 is preferably a thin flexible substrate that can be bent and used.

  The controller 200 includes an ON / OFF switch 221 and a transmission command switch 222. These ON / OFF switch 221 and transmission command switch 222 are connected to circuit board 210. The ON / OFF switch 221 activates and stops the controller 200, and the transmission command switch 222 is an operation unit for inputting the driving condition of the pump driving unit 11 in the drug solution administration control information to the pump unit 10.

  Here, the drug administration control information displayed on the display unit 220 includes at least a drug solution name, a drug solution volume (ml), a flow rate (ml / hr: hour), a bolus dose (ml), and a lockout time (minute). is there. The amount of the drug solution is the total amount of administration, and is set smaller than the capacity of the reservoir 60. The flow rate is a drug dose per unit time, the bolus dose is a single bolus dose, and the lockout time represents a prohibited time from one bolus administration to the next bolus administration.

In order to reduce the thickness of the battery used for the controller 200, a plurality of (for example, two AAA batteries) large capacity batteries (for example, two AAA batteries) are arranged in parallel at positions that do not overlap the display unit 220. The
More preferably, the drug solution administration device 1 described above further includes a holder 95 that detachably holds the pump unit 10 and the controller 200.

  FIG. 4 shows the holding state of the pump unit and the controller by the holder, (a) is a perspective view of the first embodiment, and (b) is a front view of the second embodiment. The first embodiment exemplifies a stand-type holder 95 placed on a desk or the like. Both the pump unit 10 and the controller 200 are detachably held on the stand unit 96.

  Since the holding structure of the pump unit 10 and the controller 200 to the holder 95 is the same, the holding structure of the controller 200 will be described as an example. A protrusion 96 a is formed on the stand portion 96, and grooves 200 a are formed on both side surfaces of the controller 200. The protrusion 96a can be slid into the groove 200a, and can be attached to and removed from the holder 95 by sliding the controller 200 in the direction indicated by the arrow in the drawing. The usage method of the pump unit 10 and the controller 200 will be described later.

  Next, the second embodiment will be described with reference to FIG. 4B. The pump unit 10 and the controller 200 are both detachably held on the stand portion 96 with the same structure as that of the first embodiment. The holder 95 is fixed at an appropriate position (height) of the pole 300. As a structure for fixing the holder 95 to the pole 300, although not shown, a screw having a gripping portion can be used.

Next, the system configuration of the drug solution administration device 1 will be described with reference to the drawings.
FIG. 5 is an explanatory diagram of a system configuration of the drug solution administration device according to the present embodiment. As described above, the pump unit 10 includes the reservoir 60, the pump drive unit 11, and the drive control unit 100. The drive control unit 100 includes a motor driver 101 that controls the drive of the pump drive unit 11, a timer 102 that manages the drive time of the pump drive unit 11, and a counter that determines the actual drive time of the pump drive unit 11. 103, an LED control circuit 104 that performs lighting control of a lamp 14 (here, using an LED (Light Emitting Diode)) as an alarm unit, and a battery 120 that supplies electric power to the LED control circuit 104. .

  Further, a storage circuit 110, a reception control circuit 111 and a transmission control circuit 112 as communication means are provided. The memory circuit 110 temporarily stores a preset motor driving waveform, driving frequency, and drug solution administration control information input from the controller 200.

  The controller 200 includes a display unit 220, a control unit 211, a storage circuit 213 that stores drug solution administration control information, a reception control circuit 214 and a transmission control circuit 215 as communication means.

  Next, the operation and flow related to the chemical solution administration of the chemical solution administration device 1 will be described with reference to FIG. First, the controller 200 is activated by pushing the ON / OFF switch 221. Thereafter, the medicinal solution administration control information is input to the memory circuit 213. The drug administration control information is input from a PC (Personal Computer) 250 by turning the input control circuit 216 by a keyboard operation. When the display unit 220 is a liquid crystal display, a touch switch function is added and input by a touch operation. May be.

  The chemical solution administration control information is input to a display control circuit (including a liquid crystal driver) 212, and predetermined chemical solution administration control information is displayed on the display unit 220. The chemical solution administration control information includes a chemical solution name, a chemical solution amount (ml), a flow rate (ml / hr: hour), a bolus dose (ml), and a lockout time (minute) as shown in FIG. After confirming this display content, the transmission command switch 222 is operated to input information necessary for driving the pump drive unit 11 to the pump unit 10 via the communication means.

  The information necessary for driving the pump drive unit 11 includes the amount of chemical solution, the flow rate, the bolus dose, and the lockout time. The amount of the chemical solution may include the drive duration time (pause time of the pump drive unit 11). ). The flow velocity is input to the storage circuit 110 as the rotational speed of the cam 20 (see FIG. 6), which will be described later, that is, the drive frequency of the step motor 65 (see FIG. 7).

  Next, when the ON / OFF switch 12 is operated, information input to the storage circuit 110 is read by the drive control unit 100, and the pump drive unit 11 is activated based on this information. The pump drive unit 11 is driven for a set time at the input drive frequency, and sends the drug solution in the reservoir 60 from the tube 50 at a specified dose and administration rate.

  When the set time has elapsed, it is determined that the administration of the dose has been completed, and the pump drive unit 11 stops. In addition, when replenishing the amount of the chemical solution and further administering the chemical solution, the chemical solution is injected from the septum 80. At this time, in the case of replenishment while the drug solution is being administered, the pump drive unit 11 continues to be driven until a set time without performing a special operation. Further, when replenishing the chemical solution after one cycle of the chemical solution administration is completed, the pump drive unit 11 is driven under the initially set conditions by operating the ON / OFF switch 12 after the chemical solution is replenished, and the chemical solution administration is performed. It can be performed.

  Next, bolus administration will be described. When the patient himself needs to administer the drug solution due to pain, the pump drive unit 11 is driven according to the bolus dose input in advance from the controller 200 by operating the bolus switch 13. That is, the drug solution is administered for a predetermined time by increasing the driving frequency of the rotor 70 (see FIG. 7) compared to the case of normal administration.

  In the case of bolus administration, since the lockout time is set, bolus administration is prohibited until the lockout time elapses.

  Here, alarm notification when an abnormality occurs in the pump drive unit 11 will be described. As an abnormality of the pump drive unit 11, it is assumed that the step motor 65 stops or the rotation speed becomes slow. Specifically, the counter 103 counts the number of rotations of the rotor 70 per unit time, detects a difference from a preset rotation speed (driving frequency), and when it is determined that there is a difference, as an alarm means The LED lamp 14 is turned on. Therefore, the LED lamp 14 is preferably a red lamp.

  If the LED lamp 14 is turned on as an alarm unit and at the same time an alarm is notified to the controller 200 by the communication unit, the safety can be further improved.

  In the present embodiment, non-contact communication means such as infrared communication, such as radio communication using radio waves, and wired communication means such as USB can be employed as the communication means.

  If infrared communication is used, the reception control circuits 111 and 214 of the pump unit 10 and the controller 200 may include a light receiving element and its control circuit, and the transmission control circuits 112 and 215 include a light emitting element and its control circuit. In general, communication within a range of several meters is possible, and the controller 200 can be handled like a general remote controller.

  In the case of wireless communication using radio waves, a short-distance wireless method such as a proximity wireless method or Bluetooth can be used. In the case of these wireless communications, the reception control circuit and the transmission control circuit include an antenna and its control circuit.

  In the close proximity wireless communication system, the communication distance is very short, but there is an advantage that it does not affect other pump units, and it is easy to reduce the size and cost. Further, in the case of Bluetooth, since the communication distance is several meters to several tens of meters, there is an advantage that it is possible to notify the controller 200 at a position away from the patient particularly when an alarm notification is output.

Next, the configuration and operation of the pump drive unit 11 will be described with reference to the drawings.
FIG. 6 is a plan functional configuration diagram illustrating the pump unit according to the first embodiment, and FIG. 6 and 7 show a state in which the pump unit is steadily driven, and FIG. 6 shows only the functional unit through the housing. 6 and 7, the pump unit 10 includes a pump drive unit 11 and a reservoir 60 that stores a chemical solution as a basic configuration.

  The pump drive unit 11 includes a tube 50 that communicates with the reservoir 60 and flows a chemical solution, a cam 20, and a plurality of fingers 40 to 46, and rotates the cam 20 in the arrow R direction to move the fingers 40 to 46 forward and backward. As a result, the chemical solution in the reservoir 60 is delivered while the tube 50 is repeatedly closed and released sequentially from the upstream side (reservoir 60 side) to the downstream side of the chemical solution.

  The cam 20 is fixed to the rotation shaft portion 72 of the cam drive wheel 71 and is rotated with the center of the rotation shaft portion 72 as the rotation center P. The cam drive wheel 71 is rotated through a reduction gear (not shown) for rotation of the rotor 70 constituting the step motor 65.

  As shown in FIG. 7, the cam drive wheel 71 is pivotally supported by a shaft member planted in the first machine casing 17, and the cam 20 is pivotally supported by the cam drive wheel 71 and the second machine casing 27. ing. The rotor 70 is pivotally supported by the first machine casing 17 and the third machine casing 28.

  The fingers 40 to 46 are interposed between the arc-shaped portion of the tube 50 and the cam 20, and are arranged radially from the rotation center P direction. The fingers 40 to 46 are arranged at an equal angle to each other.

  The center portion of the cam 20 is fixed to the rotating shaft portion 72 of the cam drive wheel 71 and includes four protruding portions on the outer peripheral portion. These protruding portions constitute four finger pressing portions 21a to 21d. The finger pressing portions 21a to 21d are formed on concentric circles equidistant from the rotation center P.

  The finger-pressing portion 21a and the finger-pressing portion 21b, the finger-pressing portion 21b and the finger-pressing portion 21c, and the finger-pressing portion 21c and the finger-pressing portion 21d are formed with the same circumferential pitch and outer shape.

  Each of the finger pressing portions 21a to 21d is formed with a finger pressing inclined surface 22 and a concentric circular arc portion 23 centering on the rotation center P. The arc portion 23 is provided at a position where the fingers 40 to 46 are not pushed. Further, one end of each of the finger pressing portions 21a, 21b, 21c, and 21d and the circular arc portion 23 are continued by a linear portion 24 extending from the rotation center P.

  The tube 50 is mounted in a tube guide groove 182 formed so that the range pressed by the fingers 40 to 46 is concentric with the rotation center P.

  Since each of the fingers 40 to 46 is formed in the same shape, the finger 44 will be described as an example (see also FIG. 7). The finger 44 is formed by a cylindrical shaft portion 44a, a flange portion 44c provided at one end portion of the shaft portion 44a, and a contact portion 44b whose other end portion is rounded into a hemisphere. .

  The flange portion 44 c is a pressing portion that presses the tube 50, and the contact portion 44 b is a pressing portion that is pressed by the cam 20 or the second cam 30. These fingers 40 to 46 are mounted in finger guide grooves 181 provided in the tube frame 18, and the cross-sectional direction is held by the second machine frame 27.

  The fingers 40 to 46 can move forward and backward along the finger guide groove 181 toward the rotation center P, and are pushed outward by the cam 20 (that is, toward the tube 50). The tube 50 is pressed in between, and the chemical fluid flow part 51 is closed. Therefore, the center position of the fingers 40 to 46 in the cross-sectional direction substantially coincides with the cross-sectional center position of the tube 50.

  In this embodiment, the reservoir 60 is integrally formed of the same material as the tube 50, and a septum 80 serving as a chemical solution injecting portion is connected to the end opposite to the tube 50. As shown in FIGS. 1 and 2, a part of the septum 80 faces the outside of the housing and is configured to be able to inject or seal a chemical solution from the opening / closing part 82.

  Then, the effect | action which concerns on the transport of the chemical | medical solution by this embodiment is demonstrated with reference to FIG. 6, FIG. The state shown in FIGS. 6 and 7 represents a part of the chemical solution transportation, and the finger 44 is pushed by the finger pressing portion 21d of the cam 20, and the finger 45 is formed between the finger pressing portion 21d and the finger pressing slope. 22 is in contact with the joint portion. Therefore, the fingers 44 and 45 close the tube 50. Moreover, although the finger 46 is pressing the tube 50 on the finger press sloping surface 22, it is smaller than the pressing amount of the fingers 44 and 45, and the tube 50 is not completely press-closed.

  The fingers 41 to 43 are in the range of the arc portion 23 of the cam 20 and are in an initial position where they are not pushed. Moreover, although the finger 40 is in contact with the finger pressing slope 22 of the cam 20, the tube 50 is not yet closed in this position.

  When the cam 20 is further rotated in the direction of the arrow R from this position, the finger pressing portion 21d of the cam 20 is pushed in the order of the fingers 45 and 46 to close the tube 50. At that time, the finger 44 is released from the engagement with the finger pressing portion 21d, and the tube 50 is released. The chemical liquid flows into the chemical liquid flow section 51 at a position where the pressure closing by the fingers of the tube 50 is released or a position where the pressure closing is not yet performed.

When the cam 20 is further rotated, the finger pressing slope 22 sequentially presses in the order of the fingers 40, 41, 42, and 43, and the finger pressing portion 21c reaches the contact portion in the order of the fingers 40, 41, 42, and 43. When this occurs, the tubes 50 are sequentially closed.
By repeating such an operation, the chemical liquid flows from the upstream side toward the downstream side and is discharged from the insertion member 56.

  At this time, two of the fingers 40 to 46 come into contact with the cam 20 finger pressing portions 21a to 21d, and when the next finger moves to a position where the tube 50 is closed, one of the fingers is moved. Closes the tube 50. Thus, by repeating the state in which two of the fingers 40 to 46 press-close the tube 50 and the state in which one press-closes the tube 50, at least one finger always holds the tube 50. Forms a closed state.

  As a result, when the cam 20 sequentially presses the fingers, even when switching between crushing and opening by each finger, one finger always crushes the tube 50, preventing backflow of the chemical solution. , Allowing the chemical solution to flow continuously.

  Next, the details of the structure in which the fingers press-close the tube 50 will be described with reference to FIG. The state in which the finger 44 closes the tube 50 will be described as an example. Most of the tube 50 is inserted into a tube guide groove 182 provided in the tube frame 18 in the cross-sectional direction and held at that position (indicated by a two-dot chain line in the figure).

  The finger 44 is mounted in a finger guide groove 181 provided in the tube frame 18 so as to be movable back and forth in the axial direction. In the portion where the finger guide groove 181 and the tube guide groove 182 are connected, a recess 185 in which the flange 44c provided on the finger 44 is movable is formed. Further, a recess that is a deformable region when the tube 50 is press-closed is formed in a lower portion of the tube guide wall 186 provided perpendicular to the tube guide groove 182.

A second machine frame 27 is provided above the tube 50, and the second machine frame 27 is opposed to the groove sized so that the tube 50 can be mounted at a position facing the tube guide groove 182 and the recess 185. A recess 271 and a recess that becomes a deformable region by closing the tube 50 are formed. In the tube 50, when the tube pressing portion of the cam 20 does not push the finger, the chemical fluid flowing portion 51 is opened (the position of the finger 44 at this time is indicated by a two-dot chain line).
When the finger pressing portion 21d reaches the abutting portion 44b where the fin is -44, the finger 44 (the flange portion 44c) press-closes the tube 50.

  Therefore, since the chemical solution administration device 1 according to the present embodiment includes the pump unit 10 that transports the chemical solution and the controller 200 that inputs the chemical solution administration control information as separate units, the doctor places the chemical solution administration control information in the form of the patient. By appropriately changing it accordingly, it is possible to control the drive of the pump drive unit 11 and perform appropriate drug solution administration.

  Further, since the chemical solution administration speed is determined by the rotational speed of the cam 20 (that is, the step motor 65), and the chemical solution dosage is determined by the chemical solution administration speed and the administration time, the chemical solution dosage and the chemical solution administration speed are accurately determined. Can be controlled.

  Furthermore, the pump unit 10 and the controller 200 are separated, and the medication administration control information can be set only by the doctor by the controller 200. Safety can be improved because the patient himself cannot change it.

  Further, since the controller 200 includes the display unit 220 and displays at least the chemical solution administration control information, the doctor confirms the information at the start of the administration of the chemical solution, and what kind of chemical solution the pump unit 10 has during the chemical solution administration. Since it can be confirmed whether or not driving is performed based on the administration control information, safety can be further improved.

  Further, the controller 200 and the pump unit 10 have communication means for inputting / outputting drug solution administration control information. If non-contact communication means such as infrared communication and radio communication using radio waves is employed, the controller 200 can input drug solution administration control information to the pump unit 10 in the same manner as a general remote controller. Further, if USB is used, the reliability of communication can be improved.

  Furthermore, if the pump unit 10 is also provided with transmission means, it becomes possible to transmit the drive state of the pump unit 10 such as the cam rotation speed and the elapsed drive time to the controller 200, and the doctor can change the drive state of the pump unit 10 as needed. There is an effect that it can be confirmed.

  In the pump unit of the type that discharges the chemical liquid by closing and releasing the tube 50, when the chemical liquid in the reservoir 60 is reduced, the internal pressure inside the reservoir 60 is required to be almost equal to the atmospheric pressure. 60 is formed of a flexible material. However, when the reservoir 60 is attached to a human body in the form of a single body, a variation in the discharge amount of the chemical solution due to the reservoir 60 being compressed from the outside and the internal pressure rising can be considered. Therefore, by storing the reservoir 60 in the pump unit 10 (specifically, in the housing), it is possible to eliminate fluctuations in the discharge amount of the chemical solution due to an artificial increase in pressure from the outside.

  Further, the pump unit 10 includes a hanging string 90 as a mounting means for hanging or mounting on a part of the human body or a part of the equipment in the vicinity. The administration route of the chemical solution is assumed to be intravenous administration, subcutaneous administration, or the like, but there are various drug solution injection positions. Therefore, by providing the pump unit 10 with a hanging strap (strap), the patient can hang the hanging strap around the neck and use it, and can freely act while wearing (carrying) the pump unit. The degree can be increased.

  Further, when the patient is stationary, it can be used by being hung on a part of the holder 95 or can be hung on the pole 300.

  In addition, the drug solution administration device 1 further includes a holder 95 that detachably holds either or both of the pump unit 10 and the controller 200. By adopting a configuration in which the pump unit 10 or the controller 200 can be held in the holder 95 as described above, it is possible to administer a drug solution while the pump unit 10 is placed on the holder. When the dose of the drug solution (capacity of the reservoir 60) is large and it is difficult to attach the pump unit 10 to the human body, convenience for the patient or medical staff is enhanced.

  The pump unit 10 also has a lamp 14 (or a buzzer or the like) as alarm means for notifying abnormality of the pump drive unit 11. By providing such an alarm means, when the pump drive unit 11 is stopped during the administration of the chemical solution or when the cam 20 deviates from the predetermined rotation speed, the patient himself or medical staff is notified and the abnormality is corrected. be able to.

  In addition, when the alarm means is activated, if the pump unit 10 notifies the controller 200 by wireless communication means, it is possible to notify remote doctors and medical staff, thereby further improving safety.

Further, the pump unit 10 has a bolus function. By providing the bolus function in this way, the patient can increase the dose of the drug solution by operating the bolus switch 13 when the patient wants to relieve pain by the self-regulating analgesic method. In addition, when it has a bolus function, since the lockout time is set by the controller 200, administration of an excessive analgesic can be prevented.
(Embodiment 2)

Next, Embodiment 2 will be described with reference to the drawings. The first embodiment described above exemplifies the configuration when the capacity of the reservoir 60 is about 10 ml, but the second embodiment is characterized by the configuration when the capacity of the reservoir is about 100 ml. Therefore, components having the same functions are described with the same reference numerals as those in the first embodiment, and descriptions of common parts are omitted.
8A and 8B show a pump unit according to the second embodiment, where FIG. 8A is a plan configuration diagram and FIG. 8B is a cross-sectional configuration diagram.

  8A and 8B, the pump unit 10 according to the present embodiment includes a pump drive unit 11 and a reservoir 60 having a capacity of 100 ml. Here, the pump drive unit 11 can be of the same specification as the pump drive unit of the first embodiment described above. Moreover, it has the ON / OFF switch 12, the bolus switch 13, the lamp | ramp 14 as an alarm means, and a communication means (not shown), These functions also have the same function as Embodiment 1. FIG.

  In this embodiment, a start / stop switch 19 is provided. The start / stop switch 19 is not always essential, but it is convenient when the reservoir 60 has a large capacity and is paused during re-medication and re-medication. The start / stop switch 19 may be provided in the first embodiment.

  In the present embodiment, a large-capacity battery 120 (for example, the case of using two AAA batteries) is mounted as a battery. At this time, it is desirable that the battery 120 be disposed so as to overlap the pump drive unit 11.

  Note that the pump driving unit 11, the reservoir 60, and the battery 120 are housed in a housing that includes the upper case 16 and the lower case 15. A transparent window member 81 is provided above the reservoir 60.

  Thus, even if the chemical solution storage capacity of the reservoir 60 is increased, the pump drive unit 11 can be shared with the case where the reservoir has a small capacity, and can cope with a case where the injection amount of the chemical solution is large.

  Further, when the reservoir 60 has a large capacity, the pump drive unit 11 needs to be driven for a long time. However, by using the large capacity battery 120, it is possible to continuously drive for a long time. Furthermore, since the pump drive unit 11 is small and thin, it is possible to arrange the battery 120 so as to overlap the pump drive unit 11 and to reduce the size of the pump unit 10 by effectively utilizing the space even if the capacity of the reservoir 60 is increased. it can.

In this embodiment as well, it is possible to provide a configuration including the holder 95 that holds the pump drive unit 11 and the controller 200, and to attach the hanging strap 90 to the pump drive unit 11.
(Embodiment 3)

  Next, Embodiment 3 will be described with reference to the drawings. The above-described pump unit 10 is characterized in that the pump drive unit 11 and the reservoir 60 are provided in the housing, whereas the third embodiment is characterized in that the reservoir unit and the pump drive unit are detachable. Yes. The description will focus on the differences from the first embodiment.

  9A and 9B show the pump unit according to the present embodiment, in which FIG. 9A is a mounting explanatory view, and FIG. 9B is a plan view showing a pump unit holder. The reservoir unit 130 includes a housing 131 and a reservoir 60 that is housed in the housing. A connection tube 134 is connected to one end of the reservoir 60.

  A mounting protrusion 132 and a connection portion 133 are formed at the end of the housing 131 on the pump drive unit 140 side. The distal end portion of the connection tube 134 extends to the end portion of the connection portion 133.

  The pump drive unit 140 includes a housing 141 and a pump drive unit 11 housed in the housing. A concave portion 142 and a connection portion 143 to be further drilled are formed at the end of the housing 141 on the reservoir unit 130 side. One end portion of the tube 50 extends to the end portion of the connection portion 143.

  Here, the reservoir unit 130 is attached to the pump drive unit 140 in the direction of the arrow. The mounting protrusion 132 and the recess 142 have substantially the same shape, and the position of the reservoir unit 130 and the pump drive unit 140 is regulated, and the connection portion 133 is fitted to the connection portion 143, whereby the reservoir 60, the tube 50, and the like. Are communicated through the connection tube 134. The tube 50 and the reservoir 60 may be connected using a known connection member.

  The pump unit 10 configured as described above is more preferably configured to be mounted on the pump unit holder 150 in a state in which the reservoir unit 130 and the pump drive unit 140 are mounted.

  The pump unit holder 150 has a planar shape that is substantially the same as the planar shape of the pump unit 10, and is provided with two pump unit mounting portions 153 and 154. The pump unit attachment portions 153 and 154 illustrate attachment holes in this embodiment. As a method for attaching the pump unit holder 150 of the pump unit 10, a structure in which the pump unit 10 is disposed at a predetermined position of the pump unit holder 150 and then screwed and fixed using a fixing screw can be employed.

  The pump unit holder 150 is formed with hanging string attaching portions 151 and 152, and the hanging string 90 is attached thereto. Accordingly, the pump unit 10 can be mounted on the holder 95 in a state where the pump unit 10 is mounted on the pump unit holder 150, and can be used by being suspended on the neck or the like as in the first embodiment.

  Therefore, according to the present embodiment, if the reservoir unit 130 is a cassette type and a plurality of reservoir capacities are prepared, the total amount of medicinal solution that can be continuously administered can be obtained by replacing the reservoir unit 130 while making the pump drive unit 140 a common configuration. Can be changed. In this way, there is no need to prepare the pump drive unit 140 for each capacity of the reservoir 60, so that there is an effect that the economy can be improved.

  When it is necessary to further increase the capacity of the reservoir 60, an infusion bag for infusion can be connected to the pump drive unit 140 as a reservoir unit.

Further, when the reservoir unit 130 is attached to the pump drive unit 140 and integrated as the pump unit 10 and attached to the pump unit holder 150, the reservoir unit 130 and the pump drive unit 140 are prevented from being separated during use. it can.
(Embodiment 4)

  Next, a drug solution dispensing apparatus according to Embodiment 4 will be described with reference to the drawings. The fourth embodiment is characterized in that the pump unit according to the first to third embodiments described above is attached by a band, whereas the pump unit has a hanging string as an attachment means. In addition, as a form of a pump unit, although it is applicable to any of the forms shown in Embodiments 1 to 4, the pump unit according to Embodiment 1 will be described as an example.

  FIG. 10 is a perspective view illustrating a mounting unit of the pump unit according to the fourth embodiment. In FIG. 10, the mounting means includes a band-like band 160 and a holder portion 161 attached to the band 160. The band 160 selects and uses a length according to a wearing target (for example, an arm, a torso or a leg). Then, magic tape 163 (registered trademark) is provided at both ends of the band 160 to facilitate attachment and detachment.

The pump unit 10 has holder portion mounting grooves 10a on both side surfaces. In addition, a protrusion 162 is formed on the holder part 161, and the pump unit 10 can be attached to the band 160 by slidingly inserting the protrusion 162 into the holder part mounting groove 10 a.
The configuration of the band 160 and the mounting structure of the pump unit 10 to the band 160 are only an example, and modifications or improvements are made in this embodiment as long as the purpose of mounting the pump unit 10 on a part of a living body can be achieved. It is included.

  With such a configuration, the pump unit 10 can be attached to the band 160 in addition to the hanging strap 90, so that the mounting position of the pump unit 10 is not limited, and the pump unit 10 is mounted (carrying) ) Can increase the degree of freedom of action.

  In addition, if the pump unit 10 is configured to include both the hanging string attaching portions 91 and 92 for attaching the hanging string 90 and the holder portion attaching groove 10a for attaching to the band 160, the hanging string 90 is provided. Any of the band 160 and the band 160 can be appropriately selected and used.

DESCRIPTION OF SYMBOLS 1 ... Chemical solution administration apparatus, 10 ... Pump unit, 12 ... ON / OFF switch, 13 ... Bolus switch, 14 ... Lamp as alarm means, 20 ... Cam, 40-46 ... Finger, 50 ... Tube, 60 ... Reservoir, 200 ... Controller, 220 ... Display, 221 ... ON / OFF switch, 222 ... Transmission command switch.

Claims (10)

A pump drive unit having a flexible tube communicating with a reservoir for storing a chemical solution, a cam, and a plurality of fingers arranged radially from the rotation center direction of the cam; A pump unit for transporting a chemical solution by repeatedly closing and releasing the tube from the upstream side toward the downstream side,
A controller for inputting drug administration control information to the pump unit;
Is provided,
The drug solution administration device, wherein the pump drive unit is driven and controlled based on the drug solution administration control information. In the chemical solution administration device according to claim 1,
The drug solution administration device, wherein the controller includes a display unit that displays at least the drug solution administration control information. In the chemical solution administration device according to claim 1,
The drug solution administration device, wherein the controller and the pump unit have communication means for inputting and outputting the drug solution administration control information. In the chemical solution administration device according to claim 1,
The drug solution administration device, wherein the reservoir is provided inside the pump unit with respect to the pump drive unit. In the chemical solution administration device according to claim 1,
The liquid medicine administration device characterized in that the pump unit is equipped with a mounting means for hanging or mounting on a part of a human body or a part of a nearby equipment. In the chemical solution administration device according to claim 1,
A drug solution administration device, further comprising a holder for detachably holding the pump unit and / or the controller. In the chemical solution administration device according to claim 1,
The liquid medicine administration device, wherein the pump unit has an alarm means for notifying abnormality of the pump drive unit. In the chemical solution administration device according to claim 1,
The pump unit comprises a pump drive unit including the pump drive unit, and a reservoir unit including the reservoir,
The drug solution administration device, wherein the pump drive unit and the reservoir unit are detachable, and the reservoir and the tube communicate with each other when the reservoir unit is attached to the pump drive unit. In the chemical solution administration device according to claim 8,
A drug solution administration device, further comprising a pump unit holder for holding the pump drive unit. The drug solution administration device according to any one of claims 1 to 9,
The drug solution administration device, wherein the pump unit has a bolus function.

Images