WO2014030184A1 - Infusion pump - Google Patents

Description

Infusion pump

The present invention relates to an infusion pump for delivering a medical solution or the like to a patient.

The infusion pump is used, for example, in an intensive care unit (ICU) or the like, and is used to perform a liquid feeding treatment for a patient for a long time with high accuracy. A predetermined medical solution bag (infusion bag) is placed on the infusion pump, and an infusion tube lowered from the medicinal solution bag is sandwiched between the main body and the door, and this infusion tube is accommodated in the main body. The door is held by closing the door. In the main body of the infusion pump, the outer peripheral surface of the infusion tube set at a fixed position is sandwiched between a plurality of fingers in the main body and the inner surface of the door. This infusion pump is a peristaltic infusion in which a plurality of fingers of a liquid feeding drive unit are individually driven so that a plurality of fingers sequentially press the outer peripheral surface of the infusion tube along the length direction to feed a liquid medicine. A spear that is a pump (see Patent Document 1).

In the infusion pump described in Patent Document 1, the infusion tube is held vertically through the infusion pump main body from top to bottom. On the other hand, an infusion pump that holds an infusion tube in a horizontal direction in the body of the infusion pump has been proposed. In this way, the infusion pump has a structure in which the infusion tube is held in the horizontal direction in the main body of the infusion pump so that the infusion tube passes vertically through the main body of the infusion pump from top to bottom. This is because the infusion tube does not get in the way even if a plurality of infusion pumps are stacked and held in a stacked state in the vertical position. For example, the upstream side of the infusion tube is disposed on the right side of the infusion pump main body, and the downstream side of the infusion tube is disposed on the left side of the infusion pump main body. In this case, if the upstream side of the infusion tube is arranged on the right side portion of the main body of the infusion pump, and the downstream side of the infusion tube is arranged on the left side portion of the main body of the infusion pump, the liquid feeding drive unit is driven, The liquid medicine can be fed along the predetermined liquid feeding direction from the upstream side to the downstream side, and can be correctly fed to the patient.

JP 2010-200775 A

By the way, in order for the liquid feeding drive part of the infusion pump to feed the liquid medicine in the infusion tube as described above, when the medical worker closes the open / close cover, the infusion tube is connected to the liquid feeding drive part and the infusion tube holding member. It must be located in the correct position between the members.

When a medical worker closes the opening / closing cover, a part of the infusion tube is bent, and the bent portion of the infusion tube is displaced from the correct position between the infusion drive unit and the infusion tube holding member. It may be pinched between the cover and a part of the main body. In this case, the liquid feeding drive unit cannot feed the chemical liquid correctly, and there is a possibility that an excessive amount of the chemical liquid different from the predetermined set amount is fed through the infusion tube.
Accordingly, the present invention provides an infusion tube in which an excessive amount of a chemical solution different from a predetermined set amount is set so that the medical solution cannot be delivered when the infusion tube cannot be correctly positioned with respect to the liquid delivery drive unit. It is an object of the present invention to provide an infusion pump that can prevent liquid from being fed through.

The infusion pump of the present invention includes a main body, a tube mounting portion disposed in the main body and mounting the infusion tube in a lateral direction, and disposed in the main body and mounting the infusion tube on the tube mounting portion. In the state, the infusion tube is pressurized to feed the medicinal solution in the infusion tube in the lateral direction, and the infusion tube is attached to the main body, and the infusion tube is predetermined by the infusion tube driving unit. An open / close cover that covers the infusion tube by closing in a state where the infusion tube is positioned at a correct position, and the open / close cover when the infusion tube is positioned at an abnormal position that deviates from the predetermined correct position of the liquid supply drive unit. An infusion tube abnormal mounting preventing part for preventing the liquid from closing.
According to the above configuration, when the infusion tube is positioned at an abnormal position where the infusion tube deviates from a predetermined correct position of the infusion drive unit, the opening / closing cover is prevented from closing. For this reason, when the infusion tube cannot be correctly positioned with respect to the liquid delivery drive unit, an excessive amount of chemical solution different from a predetermined set amount is delivered through the infusion tube so that the chemical solution cannot be delivered. Can be prevented.

Preferably, the infusion tube pressing portion that is disposed at a position corresponding to the liquid feeding drive unit inside the opening / closing cover and presses the liquid feeding tube positioned at the predetermined correct position to the liquid feeding drive unit. The infusion tube abnormal mounting prevention portion has a protrusion that protrudes from the main body, and the infusion tube abuts the protrusion of the main body when the infusion tube is positioned at the abnormal position. And a stopper portion for preventing the opening / closing cover from being closed to the main body.
According to the above configuration, when the infusion tube is positioned at an abnormal position, the stopper portion hits the protrusion of the main body and prevents the open / close cover from completely covering the main body, thus preventing the open / close cover from closing. .

Preferably, the stopper portion is arranged between the infusion tube pressing portion and an inner surface of the opening / closing cover.
According to the above configuration, since the stopper portion is disposed between the infusion tube holding portion and the inner surface of the opening / closing cover, it is necessary to secure a space for newly arranging the stopper portion on the inner surface of the opening / closing cover. Since there is no, the enlargement of the opening / closing cover can be avoided.

Preferably, the stopper portion includes a stopper member that abuts against the protrusion of the main body, a guide member that is provided on an inner surface of the opening / closing cover and guides the movement of the stopper member, and the infusion tube includes A spring for pushing the stopper member along the guide member from the infusion tube pressing portion and abutting the stopper member against the protruding portion of the main body when positioned at the abnormal position;
It is characterized by having.
According to the said structure, although a stopper part is simple structure, it prevents that an opening-and-closing cover closes.

Preferably, the display unit and the operation panel unit are disposed on the upper part of the main body, and the tube mounting unit, the liquid feeding drive unit, and the opening / closing cover are disposed on the lower part of the main body. It is characterized by that.
According to the above configuration, the medical worker can close the open / close cover by attaching the infusion tube to the tube attachment portion while confirming information on the display portion on the upper portion of the main body. Then, the medical worker can operate the operation buttons on the operation panel unit while confirming the information on the display unit on the upper part of the main body.

In the present invention, when the infusion tube cannot be correctly positioned with respect to the liquid feeding drive unit, the chemical solution cannot be delivered, and an excessive amount of chemical solution different from a predetermined set amount is delivered through the infusion tube. It is possible to provide an infusion pump capable of preventing the liquid from being spilled.

The perspective view which shows preferable embodiment of the infusion pump of this invention. The perspective view which looked at the infusion pump shown in FIG. 1 from the W direction. The perspective view which shows the tube mounting part for opening the opening / closing cover of the infusion pump shown to FIG. 1 and FIG. 2, and mounting | wearing with an infusion tube. The figure which shows the electrical structural example of an infusion pump. The perspective view which expands and shows the lower part and opening / closing cover of the main body of the infusion pump shown in FIG. FIG. 6A is a perspective view showing a state where the infusion tube is removed from the lower portion of the body of the infusion pump shown in FIG. 5A and the opening / closing cover, and FIG. The perspective view which shows the state which decomposed | disassembled the infusion tube pressing part shown to A). The figure which shows the structural example of a liquid feeding drive part and an infusion tube pressing part. The figure which shows the structural example of an infusion tube holding | suppressing part. The figure which shows a mode that the chemical | medical solution in an infusion tube is liquid-fed along the liquid feeding direction T. FIG. The figure which shows the structural example of the abnormal mounting | wearing prevention part of an infusion tube, and its operation example. The perspective view which shows a part of abnormal attachment prevention part of an infusion tube.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.
FIG. 1 is a perspective view showing a preferred embodiment of the infusion pump of the present invention. FIG. 2 is a perspective view of the infusion pump shown in FIG. 1 as viewed from the W direction.
The infusion pump 1 shown in FIGS. 1 and 2 is used, for example, in an intensive care unit (ICU, CCU, NICU) or the like, and is used for nutrition, such as anticancer agents, anesthetics, chemotherapeutic agents, blood transfusions, etc. This is a micro continuous infusion pump that is used to perform a micro infusion treatment of a chemical solution such as an agent for a relatively long time with high accuracy. The infusion pump 1 is used, for example, for selecting a chemical solution to be used from a chemical solution library and feeding the selected chemical solution. This chemical solution library is chemical solution information that is a group for setting a chemical solution including a pre-registered chemical solution name in the chemical solution library database (DB). By using this medical solution library, a medical worker does not have to perform complicated administration settings each time, and can select a medical solution and set a chemical solution.

As shown in FIG. 2, the infusion pump 1 can accurately deliver liquid to the patient P from the chemical solution bag 170 filled with the chemical solution 171 via the clamp 179, the infusion tube 200, and the indwelling needle 172. The drug solution is also called an infusion. An infusion tube is also called an infusion line.
The infusion pump 1 has a main body cover 2 and a handle 2T, and the handle 2T can be extended in the N direction or stored in the liquid feeding direction T. The main body cover 2 is also called a main body, and is integrally formed of a molded resin material having chemical resistance, and can be prevented from entering the infusion pump 1 even if a chemical solution is applied. have. As described above, the main body cover 2 has the drip-proof treatment structure because the chemical solution 171 in the chemical solution bag 170 disposed above spills out or disinfects the disinfecting solution used in the vicinity. Because there is.

First, the elements disposed on the main body cover 2 of the infusion pump 1 will be described.
As shown in FIGS. 1 and 2, a display unit 3 and an operation panel unit 4 are arranged on the upper portion 2 </ b> A of the main body cover 2. The display unit 3 is an image display device, and uses, for example, a color liquid crystal display device. This display unit 3 can display not only information notation in Japanese but also information in a plurality of foreign languages as required. The display unit 3 is disposed on the upper left side of the upper portion 2 </ b> A of the main body cover 2 and above the opening / closing cover 5.
The upper portion 2 </ b> A of the main body cover 2 is an upper half portion of the main body cover 2. The lower part 2 </ b> B of the main body cover 2 is a lower half part of the main body cover 2. In FIG. 2, the display unit 3 includes, as an example, a display column 3B for a scheduled dose (mL) of drug administration, a display column 3C for an accumulated dose (mL) of drug administration, a display column 3D for charge history, and a flow rate (mL). Although the display column 3E and the like are displayed, the display contents of the display unit 3 shown in FIG. 1 are omitted for the sake of simplicity of the drawing. The display unit 3 can also display a warning message.

The operation panel unit 4 is disposed on the right side of the display unit 3 in the upper part 2A of the main body cover 2, and the operation panel unit 4 includes, for example, a pilot lamp 4A, a fast-forward switch button 4B, and a start button as illustrated in FIG. A switch button 4C, a stop switch button 4D, a menu selection button 4E, a power switch 4F, and the like are arranged.

As shown in FIG. 1, an opening / closing cover 5 serving as a lid member is provided on the lower portion 2B of the main body cover 2 so as to be openable and closable in the R direction around a rotating shaft 5A. The open / close cover 5 is a plate-like lid member that is formed long along the X direction. The tube mounting part 50 and the liquid feeding drive part 60 are disposed inside the opening / closing cover 5. For example, the infusion tube 200 made of a flexible thermoplastic resin such as soft vinyl chloride is set at a correct position in the tube mounting portion 50, and the infusion tube 200 is closed by completely closing the open / close cover 5. The tube mounting portion 50 can be mounted horizontally along the X direction (liquid feeding direction T).
Note that the X direction, the Y direction, and the Z direction in FIGS. 1 and 2 are orthogonal to each other, and the Z direction is the vertical direction. The X direction is parallel to the liquid feeding direction T and is the left-right direction of the infusion pump 1. The Y direction is the front-rear direction of the infusion pump 1.

FIG. 3 shows a tube mounting portion 50 and a liquid feeding drive portion 60 for opening the opening / closing cover 5 of the infusion pump 1 shown in FIGS. 1 and 2 and mounting the infusion tube 200.
As shown in FIG. 3, the tube mounting part 50 and the liquid feeding drive part 60 are provided in the lower part 1B of the main body of the infusion pump 1 (the lower part 2B of the main body cover 2). 60 is provided along the X direction in the lower part of the display unit 3 and the operation panel unit 4. As shown in FIG. 2, the tube mounting part 50 and the liquid feeding drive part 60 can cover the opening / closing cover 5 with the opening / closing cover 5 when the opening / closing cover 5 is closed in the CR direction around the rotating shaft 5A.

A medical worker can close the open / close cover 5 by attaching the infusion tube 200 to the tube attachment portion 50 while confirming information on the display portion 3 of the upper portion 2 </ b> A of the main body cover 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while checking the information on the display unit 3 of the upper portion 2A of the main body cover 2. Thereby, in the medical field, the operativity of the infusion pump 1 can be improved.
As shown in FIG. 3, the tube mounting unit 50 includes a bubble detection unit 51, an upstream blockage sensor 52, a downstream blockage sensor 53, a tube clamp unit 270, a first infusion tube guide unit 54 at the right position, and a left side. It has the 2nd infusion tube guide part 55 of a position.

As shown in FIG. 3, an infusion tube setting direction display unit 150 for clearly displaying the correct liquid feeding direction T when the infusion tube 200 is set is provided in the vicinity of the tube mounting unit 50. The infusion tube setting direction display unit 150 includes, for example, a plurality of arrows 151. The infusion tube setting direction display unit 150 may be printed directly on the lower part of the tube mounting part 50, for example, or may be printed on a seal-like member and attached to the lower part of the tube mounting part 50. The infusion tube setting direction display unit 150 is arranged to clearly indicate the liquid feeding direction (liquid feeding direction T) of the drug solution 171 by the infusion tube 200 set inside the opening / closing cover 5.
Accordingly, when the medical staff opens the opening / closing cover 5 of FIG. 3 in the CS direction, opens the tube mounting portion 50, and mounts the infusion tube 200 on the tube mounting portion 50, the infusion tube 200 The liquid feeding direction T of the chemical liquid can be clearly indicated. For this reason, the medical worker can prevent attaching the infusion tube 200 in the reverse direction accidentally while visually confirming.

Next, a structural example of the opening / closing cover 5 shown in FIG. 3 will be described.
As shown in FIG. 3, the open / close cover 5 is a plate-like member made of a thin molded resin member in order to reduce the weight of the infusion pump 1. Thereby, the weight of the opening / closing cover 5 can be reduced, and the structure can be simplified. In order to allow the opening / closing cover 5 to cover the tube mounting part 50 and the liquid feeding drive part 60, the opening / closing cover 5 can be opened and closed along the CS direction and the CR direction about the rotation shaft 5A. That is, the opening / closing cover 5 is supported with respect to the lower portion 2B of the main body 2 using the two hinge portions 2H, 2H. The two hinge portions 2H and 2H are arranged corresponding to the first hook member 5D and the second hook member 5E, respectively.

As shown in FIG. 3, an opening / closing operation lever 260 is provided in the upper right part on the surface side of the opening / closing cover 5. On the inner surface side of the opening / closing cover 5, an infusion tube pressing portion 500, a first hook member 5D, and a second hook member 5E are provided. The infusion tube holding portion 500 is disposed as a long rectangular and planar protrusion along the X direction, and the infusion tube holding portion 500 is in a position facing the liquid feeding driving portion 60. The infusion tube holding section 500 has a flat surface in the X direction along the liquid feeding drive section 60, and the infusion tube holding section 500 closes the opening / closing cover 5 in the CR direction, A part of the infusion tube 200 is pressed between them to be sandwiched at the correct position.
The medical worker can set the infusion tube 200 along the horizontal direction of the lower half 2B of the main body 2 of the infusion pump 1 while checking the display content displayed on the display unit 3, and the infusion tube 200 is the tube. The infusion tube 200 can be covered by setting the opening / closing cover 5 in the CR direction as shown in FIGS.

As shown in FIG. 3, the first hook member 5D and the second hook member 5E are mechanically simultaneously engaged with the fixing portions 1D and 1E on the lower body 1B side, so that the open / close cover 5 is As shown, the tube mounting portion 50 and the liquid feeding drive portion 60 of the lower main body 1B are held in a closed state. The first hook member 5D, the second hook member 5E, and the fixing portions 1D, 1E on the main body lower part 1B side constitute a double hook structure portion 300 of the opening / closing cover 5.

The tube clamp part 270 shown in FIG. 3 clamps and closes the middle part of the infusion tube 200 by closing the open / close cover 5. The tube clamp portion 270 is disposed in the vicinity of the left fixed portion 1E and at a position corresponding to the left second hook member 5E. When the medical worker sets the infusion tube 200 horizontally in the X direction and the medical worker closes the opening / closing cover 5 in the CR direction, the tube clamp portion 270 can block a part of the infusion tube 200 in the middle.

As shown in FIG. 3, the first infusion tube guide portion 54 is provided on the right side of the main body lower portion 1B, and the second infusion tube guide portion 55 is provided on the left side of the main body lower portion 1B. Yes. The first infusion tube guide portion 54 can be held by fitting the upstream side 200A of the infusion tube 200, and the second infusion tube guide portion 55 can be held by fitting the downstream side 200B of the infusion tube 200, and the infusion tube 200 can be held. It is held in the horizontal direction along the X direction. Thus, the infusion tube 200 held in the horizontal direction is fed along the bubble detection unit 51, the upstream blockage sensor 52, the liquid feed drive unit 60, the downstream blockage sensor 53, and the tube clamp unit 270. It is fixed by being fitted along the liquid direction T.

As shown in FIG. 3, the 1st infusion tube guide part 54 has two processus | protrusions 54B and 54C and the inclination guide part 54T. The two protrusions 54B and 54C are formed on the lower part 1B of the main body in order to hold the upstream side 200A of the infusion tube 200 detachably when the infusion tube 200 is set in the horizontal direction. The inclined guide portion 54T is formed from the two protrusions 54B and 54C toward the diagonally upper right direction, and guides the upstream side 200A of the infusion tube 200 obliquely upward.
By providing the inclined guide portion 54T, the medical staff can not only visually confirm that the upstream side 200A of the infusion tube 200 is set on the inclined guide portion 54T side, but also the infusion tube. The upstream side 200A of 200 can be held without being bent suddenly. In addition, since the inclined guide portion 54T is exposed without being covered with the opening / closing cover 5, the medical worker directly looks at the inclined guide portion 54T, so that the upstream side 200A of the infusion tube 200 is inclined to the inclined guide portion 54T. It can be confirmed that it should be arranged on the side.

As shown in FIG. 3, the second infusion tube guide portion 55 is a groove portion formed in the side surface portion 1 </ b> S of the main body lower portion 1 </ b> B in order to detachably hold a part of the downstream side 200 </ b> B of the infusion tube 200. is there. The first infusion tube guide portion 54 and the second infusion tube guide portion 55 are provided in the tube attachment portion 50 so that the infusion tube 200 is not sandwiched between the opening / closing cover 5 and the tube attachment portion 50 and crushed. Can be installed securely. As shown in FIGS. 1 and 2, the right side surface portion 5 </ b> K of the opening / closing cover 5 is formed to be inclined toward the upper left direction. Thereby, even when the open / close cover 5 is closed, the open / close cover 5 is prevented from covering the two protrusions 54B and 54C of the first infusion tube guide portion 54 and the inclined guide portion 54T.

The bubble detection unit 51 shown in FIG. 3 is a sensor that detects bubbles (air) generated in the infusion tube 200. For example, the bubble detection unit 51 is provided inside the infusion tube 200 from the outside of the infusion tube 200 such as soft vinyl chloride. It is an ultrasonic sensor which monitors the bubble contained in the chemical | medical solution which flows into. By applying ultrasonic waves generated from the ultrasonic wave transmitting part of the ultrasonic sensor to the chemical liquid flowing in the infusion tube 200, the ultrasonic wave transmittance in the chemical liquid and the ultrasonic wave transmittance in the bubbles are different. The receiving unit monitors the presence or absence of bubbles by detecting the difference in transmittance. The bubble detection unit 51 includes a pressing member 320 and a receiving member 330. The ultrasonic transmission unit is built in a pressing member 320 disposed inside the opening / closing cover 5. The ultrasonic receiving unit is built in the receiving member 330 disposed on the lower portion 2B side of the main body 2.

The upstream blockage sensor 52 shown in FIG. 3 is a sensor that detects whether or not the inside of the infusion tube 200 is blocked on the upstream side 200A of the infusion tube 200, and the downstream blockage sensor 53 is an infusion solution on the downstream side 200B of the infusion tube 200. It is a sensor that detects whether or not the inside of the tube 200 is closed. The upstream blockage sensor 52 and the downstream blockage sensor 53 have the same configuration. The case where the infusion tube 200 is blocked is, for example, the case where the chemical solution to be delivered has a high viscosity or a high concentration of the chemical solution.

3, pressing members 452 and 453 are provided on the inner surface side of the opening / closing cover 5 at positions corresponding to the upstream closing sensor 52 and the downstream closing sensor 53, respectively. When the medical worker sets the infusion tube 200 in the tube mounting portion 50 as shown in FIG. 3 and then closes the opening and closing cover 5 as shown in FIG. 2, the pressing member 452 and the pressing member 453 on the opening and closing cover 5 side A part of the infusion tube 200 can be pressed against the upstream blockage sensor 52 and the downstream blockage sensor 53 side, respectively. For this reason, even if the infusion tube 200 of any size among the plural types of infusion tubes 200 having different diameters is attached to the infusion pump 1, when the open / close cover 5 is closed, the upstream side occlusion sensor 52 and the downstream side occlusion sensor 53 are The occlusion state of the infusion tube 200 can be detected.

FIG. 4 shows an electrical configuration example of the infusion pump 1.
As shown in FIG. 4, the infusion pump 1 has a control unit (computer) 100 that controls the overall operation. The control unit 100 is a one-chip microcomputer, for example, and includes a ROM (read only memory) 101, a RAM (random access memory) 102, a nonvolatile memory 103, and a clock 104. The clock 104 can correct the current time by a predetermined operation, and can acquire the current time, measure the elapsed time of a predetermined liquid feeding operation, measure the reference time of liquid feeding speed control, and the like.
The control unit 100 shown in FIG. 4 is connected to a power switch button 4F and a switch 111. The switch 111 supplies power to the control unit 100 from either the power converter unit 112 or the rechargeable battery 113 by switching between the power converter unit 112 and the rechargeable battery 113 such as a lithium ion battery. The power converter unit 112 is connected to a commercial AC power source 115 via an outlet 114.

The display unit driver 130 in FIG. 4 drives the display unit 3 in response to an instruction from the control unit 100, and displays information contents and warning messages illustrated in FIG. The speaker 131 can notify various alarm contents by voice according to a command from the control unit 100. The buzzer 132 can notify various alarms by sound according to commands from the control unit 100. The speaker 131 is an example of a warning unit that issues a warning by voice to a medical worker when the infusion tube 200 is set in the N direction (reverse direction), which is the wrong direction. The buzzer 132 is an example of a warning unit that issues a warning by sound to a medical worker when the infusion tube 200 is set in the N direction (reverse direction), which is the wrong direction.

In FIG. 4, the bubble detection signal S <b> 1 from the bubble detection unit 51, the upstream blockage signal S <b> 2 indicating that the upstream side of the infusion tube 200 from the upstream blockage sensor 52 is blocked, and the infusion tube 200 from the downstream blockage sensor 53. A downstream blocking signal S3 indicating that the downstream side is blocked is supplied to the control unit 100. The upstream blockage sensor 52 and the downstream blockage sensor 53 can detect a state in which the internal pressure of the infusion circuit exceeds the set pressure in the infusion pump 1 and the liquid medicine cannot be delivered. The reason why the internal pressure of the infusion circuit exceeds the set pressure in the infusion pump 1 is that when the infusion needle for infusion or the infusion tube 200 is clogged, the infusion tube 200 is crushed or broken, a highly viscous chemical solution This is the case when using.

In FIG. 4, the control unit 100 can communicate bidirectionally with a computer 141 such as a desktop computer through the communication port 140. The computer 141 is connected to a chemical solution database (DB) 160, and the chemical solution information MF stored in the chemical solution database 160 is acquired by the control unit 100 via the computer 141, and the nonvolatile information of the control unit 100 is stored. It can be stored in the memory 103. The control unit 100 can display the chemical information MF and the like on the display unit 3 shown in FIG. 2, for example, based on the stored chemical information MF.

FIG. 5 is an enlarged perspective view showing the lower portion 2B of the main body 2 and the opening / closing cover 5 of the infusion pump 1 shown in FIG. In FIG. 5A, the infusion tube 200 is in a normal state along the liquid feeding direction T with respect to the bubble detection unit 51, the upstream blockage sensor 52, the liquid feed driving unit 60, and the downstream blockage sensor 53. It shows a state where it is fixed by fitting. In FIG. 5B, the infusion tube 200 is in an abnormal state along the liquid feeding direction T with respect to the bubble detection unit 51, the upstream blockage sensor 52, the liquid feed drive unit 60, and the downstream blockage sensor 53. It shows a state where it is fitted and fixed.

The bubble detection unit 51 shown in FIG. 5 is also called a bubble detection sensor, and detects the presence or absence of bubbles (air) in the infusion tube 200. The bubble detection unit 51 is an ultrasonic sensor that monitors bubbles contained in the chemical flowing in the infusion tube 200. The ultrasonic wave transmission unit 321 of the bubble detection unit 51 is disposed in the pressing member 320. The ultrasonic wave receiving unit 331 of the bubble detecting unit 51 is disposed in the receiving member 330.

As shown in FIGS. 1 and 2, when the opening / closing cover 5 is closed, the pressing member 320 of FIG. 5 presses the infusion tube 200 against the receiving member 330, and crushes the infusion tube 200 by a predetermined amount. Yes. The pressing member 320 is disposed inside the opening / closing cover 5, and the receiving member 330 is disposed in the lower portion 2 </ b> B of the main body 2. Since the ultrasonic wave generated from the ultrasonic wave transmitting part 321 of the pressing member 320 is applied to the chemical liquid flowing in the infusion tube 200, the ultrasonic transmittance of the chemical liquid and the ultrasonic wave transmittance of the bubbles are different. The ultrasonic receiving unit 331 of the receiving member 330 detects the presence or absence of bubbles by detecting the difference in transmittance.

As shown in FIG. 5A, in a state where the infusion tube 200 is fitted in a normal state, any part of the infusion tube 200 is along the liquid feeding direction T and is not bent. The infusion tube 200 is disposed straight through the central portion of the liquid feeding drive unit 60. On the other hand, as shown in FIG. 5B, when the infusion tube 200 is fitted in an abnormal state, a part of the infusion tube 200 is bent and bent, and this bent and bent portion 200G. Does not pass through the central portion of the liquid feeding drive unit 60 but reaches the upper part of the liquid feeding drive unit 60. In this state, even if the opening / closing cover 5 is closed as shown in FIGS. 2 and 2, the opening / closing cover 5 is not completely closed.

6A is a perspective view showing a state in which the infusion tube 200 is removed from the lower portion 2B of the main body 2 of the infusion pump 1 and the opening / closing cover 5 shown in FIG. 5A. FIG. 6B is a perspective view showing a state where the infusion tube holding portion 500 shown in FIG.
With reference to FIG. 6 (A), FIG. 6 (B), FIG. 7, and FIG. FIG. 7 is a view showing a structural example of the liquid feeding drive unit 60 and the infusion tube holding part 500, and FIG. 8 shows a structural example of the infusion tube holding part 500. FIG. 9 is a diagram illustrating an operation example of the liquid feeding drive unit 60.

The infusion tube holding section 500 shown in FIGS. 6 to 8 is configured to drive the infusion tube 200 regardless of the size of the infusion tube 200 of a plurality of types of infusion tubes 200 having different diameters. This is a buffer device for holding the unit 60.
As shown in FIG. 6, the infusion tube holding portion 500 is disposed as a long rectangular and planar protrusion along the X direction (liquid feeding direction T). The infusion tube holding part 500 is arranged on the inner side surface 5W of the opening / closing cover 5, and the infusion tube holding part 500 faces the liquid feeding driving part 60 arranged in the lower part 2B of the main body 2.
As shown in FIG. 5A, when the infusion tube 200 is fitted in a normal state, the opening / closing cover 5 can completely close the lower portion 2B of the main body 2 as shown in FIGS. it can. On the other hand, as shown in FIG. 5B, it will be described later that the infusion tube 200 is fitted in an abnormal state. However, the opening / closing cover 5 completely covers the lower portion 2B side of the main body 2. A structure that cannot be closed is used.

As shown in FIGS. 6 (A) and 6 (B), the infusion tube holding portion 500 includes a plastic holding member 510, a plastic first protruding member 501, and a second protruding member 502, in total. It has a large first spring 511, a total of four small second springs 512, and two screws 513. As shown in FIG. 6A, the pressing member 510 has a long rectangular flat surface 514 along the liquid feeding drive unit 60. The first guide groove 521, the second guide groove 522, A spring holding portion 523 is provided. Both the first guide groove portion 521 and the second guide groove portion 522 are through-holes having a rectangular cross section penetrating in the Z direction. A first projecting member 501 is movably fitted in the first guide groove 521, and a second projecting member 502 is movably fitted in the second guide groove 522.

As shown in FIG. 6B, one end portions of the four first springs 511 are arranged on the inner side surface 5W of the opening / closing cover 5, and each first spring 511 stands in the Z direction. The other end of each first spring 511 is fitted into the holding member 510 spring holding portion 523. Accordingly, the pressing member 510 is held in parallel by the four first springs 511 on the inner surface 5W of the opening / closing cover 5.
As shown in FIGS. 7 and 8, the first projecting member 501 is held on the inner surface 5W of the opening / closing cover 5 by two second springs 512, and resists the force of the second spring 512 in the first guide groove portion 521. And can be pushed down in the Z1 direction. The second projecting member 502 is held by the two second springs 512 at the inner bottom portion 5W of the opening / closing cover 5, and can be pushed down in the Y1 direction against the force of the second spring 512 at the second guide groove portion 522. The pressing member 510 is held on the inner surface 5W of the opening / closing cover 5 by using two screws 513, but the pressing member 510 can be pushed down in the Z1 direction against the force of the first spring 511. .

Next, referring to FIGS. 7 and 9, an example of the structure of the liquid feeding drive unit 60 will be described.
The liquid feeding drive unit 60 preferably has a so-called mid press type mechanism. In the peristaltic finger type liquid feeding drive unit that is normally used, a plurality of fingers squeeze the infusion tube from the fully open state to the completely closed state, while the mids shown in FIGS. 7 and 9 are used. The press-type liquid feeding drive unit 60 can crush the liquid transfusing tube 200 by a certain amount within a range in which the deformation or sag of the liquid transfusing tube 200 is small, and can accurately feed the liquid amount corresponding thereto.

As shown in FIG. 7, the liquid feeding drive unit 60 includes a plurality of fingers FG1 to FG7 and a cam structure 62 that individually operates these fingers FG1 to FG7. The fingers FG1 to FG7 are arranged in order from the upstream side to the downstream side in the chemical liquid feeding direction T along the chemical liquid feeding direction T. The pressing surfaces 680 of the fingers FG2, FG3, FG4, FG5, and FG7 are flat surfaces, but the pressing surfaces 681 of the two fingers FG1 and FG6 are provided with convex portions 682 and 683, respectively.

Thus, since the two fingers FG1 and FG6 have the convex portion 682, the two fingers FG1 and FG6 completely close only the upstream portion 200M and the downstream portion 200N of the infusion tube 200. However, the pressing surface 680 of the other five fingers FG2, FG3, FG4, FG5, and FG7 is about the portion 200R, 200S, 200T, 200U, and 200V of the infusion tube 200 by the amount that the convex portion is not formed. Do not close completely by crushing halfway. By doing in this way, the deformation | transformation and sag of the infusion tube 200 can be prevented, the burden to the infusion tube 200 can be reduced, the liquid quantity of the chemical | medical solution by the infusion tube 200 can be made accurate, and liquid feeding precision is raised. be able to.

The cam structure 62 shown in FIG. 7 has a plurality of cams C1 to C7. The cams C1 to C7 respectively advance the fingers FG1 to FG7 in the Y1 direction to pressurize the corresponding portions 200M, 200R, 200S, 200T, 200U, 200N, and 200V of the infusion tube 200. The cams C1 to C7 are arranged with a phase difference with respect to the rotation direction. Cams C <b> 1 to C <b> 7 of the cam structure 62 are connected to the output shaft 61 </ b> A of the drive motor 61. By closing the opening / closing cover 5 shown in FIG. 3 in the CR direction, the infusion tube holding part 500 is configured to press and sandwich a part of the infusion tube 200 between the infusion tube driving part 60.

FIG. 9 shows a state in which the liquid medicine 171 in the infusion tube 200 is fed along the liquid feeding direction T.
FIG. 9 shows the liquid feeding state PS1 to the liquid feeding state PS6. When the output shaft 61A of the drive motor 61 rotates according to the command of the control unit 100 shown in FIG. 7, the seven fingers C1 to C7 advance and retreat by a predetermined stroke in the Y1 direction according to a predetermined order. As shown, the liquid 171 is fed by pressurizing the infusion tube 200.
9, only the convex portion 683 of the finger FG6 advances in the Y1 direction and completely closes the portion 200N of the infusion tube 200, but the other fingers FG1 to FG5 and FG7 advance in the Y1 direction. Not. Thereby, in the infusion tube 200, the chemical | medical solution 171 sent in the liquid feeding direction T is dammed in the part 200N.

9, the finger FG1 advances in the Y1 direction, completely closes the portion 200M of the infusion tube 200, and the fingers FG2, FG3, FG4, and FG5 slightly advance in the Y1 direction. Thereby, in the infusion tube 200, a fixed amount of chemical | medical solution 171 is ensured by confining between the part 200M and the part 200N.
9, only the convex portion 683 of the finger FG6 returns in the Y2 direction, so that the chemical solution 171 between the portion 200M and the portion 200N of the infusion tube 200 starts to be fed in the liquid feeding direction T. In the liquid feeding state PS4, only the convex portion 683 of the finger FG6 further returns in the Y2 direction, and in the liquid feeding state PS5, the fingers FG3, FG4, and FG5 return in the Y2 direction. In the liquid feeding state PS6, the finger FG6 advances again in the Y1 direction and completely closes the portion 200N of the infusion tube 200, whereby a certain amount of the chemical solution 171 is secured between the portion 200M and the portion 200N in the infusion tube 200. The In the liquid feeding state PS1, the finger FG1 returns to the Y2 direction again, and the next liquid feeding operation cycle starts.

In this way, the plurality of fingers FG1 to FG7 press the outer peripheral surface of the infusion tube 200 along the liquid feeding direction T, thereby feeding the liquid medicine in the infusion tube 200. By controlling the peristaltic movement of the fingers FG1 to FG7, the fingers FG1 to FG7 are moved forward and backward, and the infusion tube 200 is moved in the liquid feeding direction T so as to make the wave travel. 200 can be squeezed to transfer the chemical.

Next, with reference to FIG. 10, FIG. 11, and FIG.
FIG. 10 shows a structural example and an operation example of the abnormal attachment preventing unit 800 for an infusion tube. FIG. 11 is a perspective view showing a part of the abnormal mounting preventing portion 800 for an infusion tube.
The infusion tube abnormal mounting preventing portion 800 shown in FIG. 6A includes a protruding portion 801 and a stopper portion 850. As shown in FIG. 6A, the protrusion 801 is provided on the lower portion 2B of the main body 2. The protrusion 801 is preferably provided in the lower portion 2B at a position above the liquid feeding drive unit 60, and the protrusion 801 protrudes in the Y1 direction (front of the main body 2). In addition, the bowl-shaped tip portion 500a of the infusion tube holding portion 500 also has a function as an abnormal attachment preventing portion.

6A and 6B is provided on the inner side surface 5W of the opening / closing cover 5. The stopper portion 850 shown in FIG. As shown in FIG. 1, the stopper portion 850 is in a position corresponding to the protruding portion 801 in the liquid feeding direction T when the open / close cover 5 is closed. The stopper portion 850 is disposed between the infusion tube pressing portion 500 and the inner surface of the opening / closing cover 5. Thereby, since the stopper part 850 is arrange | positioned between the infusion tube pressing part 500 and the inner surface of the opening / closing cover 5, the space for newly arrange | positioning the stopper part in the inner surface of the opening / closing cover 5 is ensured. Since there is no necessity, the enlargement of the opening / closing cover 5 can be avoided.

An example of the structure of the stopper portion 850 is shown in FIG. The stopper portion 850 includes a stopper member 851, a spring 852, an attachment member 853, and a guide member 854. The attachment member 853 is provided so as to protrude inward on the inner side surface 5 </ b> W of the opening / closing cover 5. The stopper member 851 is slidable in the SL direction along the inner side surface 5W of the opening / closing cover 5 on the inner side surface 5W of the opening / closing cover 5. One end of the spring 852 is connected to the stopper member 851, and the other end of the spring 852 is connected to the attachment member 853.

As shown in FIG. 10, the stopper member 851 has an inclined surface 888, and the inclined surface 888 tapers toward the distal end portion 889 of the stopper member 851. The guide member 854 is fixed to the inner side surface 5 </ b> W of the opening / closing cover 5. As shown in FIG. 11B, the guide member 854 guides the stopper member 851 so as to be slidable in the SL direction. Thereby, the stopper member 851 can slide in the SL direction as shown in FIG. 10A to FIG. 10B by the force of the spring 852 in the guide member 854. Further, the stopper member 851 is pushed in the ST direction against the force of the spring 852, so that the position of the stopper member 851 can be returned to the guide member 854 side as shown in FIG. ing.

Next, the operation | movement at the time of using the infusion pump 1 mentioned above is demonstrated.
As shown in FIG. 3, when a medical worker opens the open / close cover 5 and sets the infusion tube 200 in the tube mounting portion 50, the infusion tube setting direction display unit 150 is viewed to visually set the infusion tube 200. I can confirm. Then, the medical worker opens the opening / closing cover 5 and fits the upstream side 200A of the infusion tube 200 toward the first infusion tube guide part 54 side of the right side toward the main body lower part 1B, and the downstream side 200B of the infusion tube 200. Is inserted into the second infusion tube guide 55 side of the left part of the main body lower part 1B.

Thereby, the medical staff can correctly set the infusion tube 200 with respect to the infusion pump 1 along the liquid feeding direction T. The medical worker converts the infusion tube 200 shown in FIG. 4 into a first infusion tube guide portion 54, a bubble detection portion 51, an upstream blockage sensor 52, a liquid feed drive portion 60, a downstream blockage sensor 53, a tube clamp portion 270, and It can be set in the liquid feeding direction T along the second infusion tube guide portion 55. Thereafter, as shown in FIGS. 1 and 2, the opening / closing cover 5 completely closes the lower portion 2 </ b> B of the main body 2, so that the opening / closing cover 5 has the bubble detection unit 51, the upstream closing sensor 52, and the downstream closing sensor 53. And the liquid feeding drive unit 60 and the tube clamp unit 270 are covered.

By the way, as shown in FIG. 10 (A), the infusion tube 200 is in a correct position at the center with respect to the Z direction between the tube mounting part 50 and the liquid feeding drive part 60 with the open / close cover 5 completely closed. What is necessary is just to pinch correctly in PK. That is, as shown in FIG. 5 (A), the infusion tube 200 does not have a bent and bent portion, and is mounted straight along the liquid feeding direction T. As described above, the infusion tube 200 is correctly placed between the tube mounting part 50 and the liquid feeding drive part 60 in a state where the opening / closing cover 5 completely closes the tube mounting part 50 and the liquid feeding driving part 60 of the lower part 2B of the main body 2. If sandwiched, the drug solution can be correctly fed along the feeding direction T through the infusion tube 200.

First, the state immediately before the state shown in FIG. After the infusion tube 200 is correctly set between the tube mounting portion 50 and the liquid feeding drive portion 60 at the correct position PK at the center position in the Z direction, the opening / closing operation lever 260 provided at the upper right end portion of the opening / closing cover 5 By pushing the first hook member 5D and the second hook member 5E onto the fixing portions 1D and 1E at the same time, the protrusion 801 causes the tip 889 of the inclined surface 888 of the stopper member 851 to spring 852. Push down in the SL direction against the force of. Further, by pushing the opening / closing operation lever 260, the first hook member 5D and the second hook member 5E are mechanically and completely engaged with the fixing portions 1D and 1E, respectively. The lower portion 2B is completely covered (the state shown in FIGS. 1 and 2). The infusion tube holding portion 500 of the tube mounting portion 50 is pushed in the Y1 direction against the force of the spring 511. As a result, the bowl-shaped tip portion 500a of the infusion tube holding portion 500 pushes the inclined surface 888 of the stopper member 851 further downward in the SL direction against the force of the spring 852, so that the state of FIG. Become. For this reason, the opening / closing cover 5 can completely cover the lower portion 2B of the main body 2 as shown in FIGS.

However, when a medical worker attaches the infusion tube 200 to the tube attachment portion 50, the infusion tube 200 is connected to the tube attachment portion 50 and the liquid supply drive as illustrated in FIGS. 10B and 10C. When the portion 60 is not correctly sandwiched between the correct positions PK at the center position in the Z direction, that is, the infusion tube 200 may be sandwiched at the abnormal positions PV1 and PV2.
First, as shown in FIG. 10B, when the infusion tube 200 is sandwiched at the abnormal position PV1 and is not sandwiched correctly, the protrusion 801 causes the tip 889 of the inclined surface 888 of the stopper member 851 to spring 852. The distal end portion 889 is protruded, and the infusion tube 200 is not sandwiched between the infusion tube holding portion 500 and the infusion drive portion 60 of the tube mounting portion 50. As shown in FIG. 5B, the bent portion 200 </ b> G of the infusion tube 200 is sandwiched between the upper portions of the infusion tube holding portion 500. In this case, the infusion tube holding part 500 is pushed out in the Y2 direction by the force of the spring 511.

Accordingly, since the protrusion 801 and the inclined surface 888 of the stopper member 851 are in contact with each other, there is interference between the protrusion 801 and the inclined surface 888 of the stopper member 851, and the opening / closing cover 5 is shown in FIGS. As shown in FIG. 2, the lower part 2B of the main body 2 cannot be completely covered. That is, as shown in FIG. 5 (B), if there is a bent portion 200G of the infusion tube 200, the opening / closing cover 5 cannot be completely closed. Can be confirmed. For this reason, the medical staff returns the mounting state of the infusion tube 200 from the abnormal state shown in FIG. 5B to the normal state shown in FIG. 5A, and the first hook member 5D and the second hook member 5E. Are completely engaged with the fixing portions 1D and 1E simultaneously, so that the opening / closing cover 5 completely covers the lower portion 2B of the main body 2 (the state shown in FIGS. 1 and 2).

Next, in the case where the infusion tube 200 shown in FIG. 10C is sandwiched at the abnormal position PV2 and is not correctly sandwiched, the infusion tube 200 is infused with the infusion tube holding portion 500 and the infusion drive portion 60 of the tube mounting portion 50. It is not sandwiched between. As shown in FIG. 5B, the bent portion 200 </ b> G of the infusion tube 200 is sandwiched between the lower portions of the infusion tube holding portion 500. In this case, the infusion tube holding portion 500 is pushed in the Y2 direction by the force of the spring 511, and the hook-shaped tip portion 500a is caught by the jaw portion 851a at the base portion of the inclined surface 888. .
For this reason, since the infusion tube pressing part 500 is separated from the tip 889 of the inclined surface 888 of the stopper member 851, the stopper member 851 is pushed out in the SL direction by the force of the spring 852.

Accordingly, since the protrusion 801 and the inclined surface 888 of the stopper member 851 are in contact with each other, there is interference between the protrusion 801 and the inclined surface 888 of the stopper member 851, and the opening / closing cover 5 is shown in FIGS. As shown in FIG. 2, the lower part 2B of the main body 2 cannot be completely covered. That is, as shown in FIG. 5 (B), if there is a bent portion 200G of the infusion tube 200, the opening / closing cover 5 cannot be completely closed. Can be confirmed. For this reason, the medical worker returns the abnormal mounting state of the infusion tube 200 to the normal state shown in FIG. 5A, and attaches the first hook member 5D and the second hook member 5E to the fixing portions 1D and 1E, respectively. Thus, by completely engaging at the same time, the opening / closing cover 5 completely covers the lower part 2B of the main body 2 (the state shown in FIGS. 1 and 2).

As described above, the medical worker drives the liquid feeding drive unit 60 after the infusion tube 200 is in a normal wearing state as shown in FIGS. Can be fed through the infusion tube 200 along the feeding direction T. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while checking the information on the display unit 3 of the upper portion 2A of the main body cover 2. As shown in FIG. 2, the infusion pump 1 can accurately deliver liquid to the patient P from the chemical solution bag 170 filled with the chemical solution 171 via the clamp 179, the infusion tube 200, and the indwelling needle 172. it can.

As described above, the infusion pump 1 according to the embodiment of the present invention is equipped with the main body 2 and the infusion tube 200 that is disposed in the main body 2 and infuses the medicinal solution to the patient side in the lateral direction (liquid feeding direction T). In the state where the tube mounting part 50 and the main body 2 are disposed and the infusion tube 200 is mounted in the tube mounting part 50, the infusion tube 200 is pressurized to feed the liquid in the infusion tube 200 laterally. The opening / closing cover 5 that is attached to the drive unit 60 and the main body 2 and covers the infusion tube 200 by closing the infusion tube 200 in a state where the infusion tube 200 is positioned at a predetermined correct position PK of the infusion drive unit 60, and the infusion tube 200 Abnormal placement of the infusion tube that prevents the opening / closing cover 5 from closing when positioned at the abnormal positions PV1, PV2 deviating from the predetermined correct position PK of the liquid delivery drive unit 60. It has a prevention section 800. Thereby, when the infusion tube 200 is positioned at the abnormal positions PV1 and PV2 deviated from the predetermined correct position PK of the liquid feeding drive unit 60, the opening / closing cover 5 is prevented from being closed. For this reason, when the infusion tube 200 cannot be correctly positioned with respect to the liquid feeding drive unit 60, an excessive amount of chemical solution different from a predetermined set amount is prevented so that the chemical solution cannot be fed. The liquid can be prevented from being fed through.

An infusion tube pressing portion 500 that is arranged at a position corresponding to the infusion opening drive unit 60 inside the opening / closing cover 5 and presses the infusion tube 200 positioned at a predetermined correct position PK to the infusion drive unit 60; The infusion tube abnormal mounting preventing portion 800 protrudes from the main body 2 and protrudes from the main body 2 when the infusion tube 200 abuts the protrusion 801 of the main body 2 when the infusion tube 200 is positioned at the abnormal position PV. Has a stopper portion 850 for preventing the main body 2 from closing. As a result, when the infusion tube 200 is positioned at the abnormal position PV, the stopper portion 850 strikes the protrusion 801 of the main body 2 and prevents the open / close cover 5 from completely covering the main body 2. Prevent closing. For this reason, when the infusion tube 200 cannot be correctly positioned with respect to the liquid feeding drive unit 60, an excessive amount of chemical solution different from a predetermined set amount is prevented so that the chemical solution cannot be fed. The liquid can be prevented from being fed through.

The stopper portion 850 is disposed between the infusion tube holding portion 500 and the inner surface of the opening / closing cover 5. Thereby, since the stopper part 850 is arrange | positioned between the infusion tube pressing part 500 and the inner surface of the opening / closing cover 5, the space for newly arrange | positioning the stopper part in the inner surface of the opening / closing cover 5 is ensured. Since there is no necessity, the enlargement of the opening / closing cover 5 can be avoided.

The stopper portion 850 is provided on the inner surface of the opening / closing cover 5 with a stopper member 851 for abutting against the protruding portion 801 of the main body 2, and the guide member 854 for guiding the movement of the stopper member 851. A spring 852 is provided to push the stopper member 851 against the protrusion 801 of the main body by pushing the stopper member 851 from the infusion tube pressing portion 500 along the guide member 854 when positioned on the PV. Accordingly, the stopper portion 850 has a simple configuration, but prevents the opening / closing cover 5 from completely covering the main body 2, thereby preventing the opening / closing cover 5 from closing.

In the upper part 2A of the main body 2, the display unit 3 and the operation panel unit 4 are arranged, and in the lower part 2B of the main body 2, a tube mounting part 50, a liquid feeding drive part 60 and an opening / closing cover 5 are arranged. Therefore, a medical worker can close the open / close cover 5 by mounting the infusion tube 200 on the tube mounting portion 50 while confirming information on the display portion 3 of the upper portion 2A of the main body 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while confirming information on the display unit 3 of the upper portion 2A of the main body 2.

By the way, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made to the present invention, and various modifications can be made within the scope described in the claims.
In the example shown in FIGS. 1 and 2, the infusion tube 200 is set along the liquid feeding direction T, which is the horizontal direction, by the tube mounting portion 50, but the present invention is not limited thereto. A structure may be adopted in which the tube 200 is inclined and set in the lateral direction so as to be lowered by a predetermined angle from the upstream side 200A to the downstream side 200B.

DESCRIPTION OF SYMBOLS 1 ... Infusion pump, 2 ... Main body cover (it is also called main body), 2A ... Upper part of main body cover, 2B ... Lower part of main body cover, 3 ... Display part, 4 ... Operation panel part, 5 ... Opening / closing cover (lid member), 50 ... Tube mounting part, 51 ... Bubble detection part, 60 ... Liquid feeding drive part, 500 ... Infusion tube pressing part, 800 ... Abnormal mounting prevention part of infusion tube, 801 ... Protrusion part, 850 ... Stopper part, T ... Liquid feeding direction

Claims (5)

The body,
A tube mounting portion disposed in the main body and mounting the infusion tube in a lateral direction;
In the state where the infusion tube is mounted on the tube mounting portion and disposed in the main body, the infusion tube pressurizes the infusion tube and feeds the medicinal solution in the infusion tube in the lateral direction; and
An open / close cover that is attached to the main body and covers the infusion tube by closing the infusion tube in a state where the infusion tube is positioned in a predetermined correct position.
An infusion tube abnormal mounting preventing portion for preventing the opening and closing cover from closing when the infusion tube is positioned at an abnormal position deviating from the predetermined correct position of the liquid feeding drive unit. Infusion pump. The infusion tube holding portion that presses the infusion tube that is disposed inside the open / close cover and is positioned at the predetermined correct position to the infusion drive portion, and the abnormal mounting prevention portion of the infusion tube is, A protruding portion that protrudes from the main body, and a stopper portion that prevents the opening / closing cover from closing to the main body by striking the protruding portion of the main body when the infusion tube is positioned at the abnormal position. The infusion pump according to claim 1, further comprising: 3. The infusion pump according to claim 1, wherein the stopper portion is disposed between the infusion tube holding portion and an inner surface of the opening / closing cover. The stopper portion is a stopper member that abuts against the protrusion of the main body, a guide member that is provided on an inner surface of the opening / closing cover and guides the movement of the stopper member, and the infusion tube is in the abnormal position. A spring for pushing the stopper member along the guide member from the infusion tube pressing portion and abutting the stopper member against the protruding portion of the main body. The infusion pump according to any one of claims 1 to 3, wherein The display unit and the operation panel unit are disposed in an upper part of the main body, and the tube mounting unit, the liquid feeding drive unit, and the opening / closing cover are disposed in a lower part of the main body. The infusion pump according to any one of claims 1 to 4.

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