WO2014024236A1 - 輸液ポンプ - Google Patents
輸液ポンプ Download PDFInfo
- Publication number
- WO2014024236A1 WO2014024236A1 PCT/JP2012/005124 JP2012005124W WO2014024236A1 WO 2014024236 A1 WO2014024236 A1 WO 2014024236A1 JP 2012005124 W JP2012005124 W JP 2012005124W WO 2014024236 A1 WO2014024236 A1 WO 2014024236A1
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- WIPO (PCT)
- Prior art keywords
- infusion tube
- infusion
- tube
- main body
- bubble
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14212—Pumping with an aspiration and an expulsion action
- A61M5/14228—Pumping with an aspiration and an expulsion action with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/162—Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
- A61M5/365—Air detectors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
- A61M2005/16863—Occlusion detection
- A61M2005/16868—Downstream occlusion sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
- A61M2005/16863—Occlusion detection
- A61M2005/16872—Upstream occlusion sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3375—Acoustical, e.g. ultrasonic, measuring means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
Definitions
- the present invention relates to an infusion pump for delivering a medical solution or the like to a patient.
- the present invention relates to an infusion pump that attaches an infusion tube in a horizontal direction with respect to an infusion pump and delivers the fluid.
- 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.
- 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).
- the infusion tube is held vertically through the infusion pump main body from top to bottom.
- an infusion pump that holds an infusion tube in a horizontal direction in the body of the infusion pump has been proposed.
- 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.
- 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.
- 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.
- the infusion pump has a bubble detection unit (bubble sensor) that detects whether or not bubbles are present in the infusion tube.
- the bubble sensor has an ultrasonic transmitter and an ultrasonic receiver.
- the boundary between the drug solution and the air passes through the portion where the flow path of the infusion tube is narrowed in the bubble sensor.
- a part of the chemical solution also referred to as a chemical liquid droplet
- a part of the chemical solution may remain in the portion where the flow path of the infusion tube is narrowed.
- the present invention can prevent the bubble sensor from erroneously detecting the presence or absence of bubbles by leaving no part of the chemical solution in the portion where the flow path of the infusion tube is narrowed by the bubble sensor.
- the infusion pump of the present invention is disposed in the main body, a tube mounting portion that is disposed in the main body, and in which a liquid transfusion tube that infuses a liquid medicine to the patient side is mounted in a horizontal direction (lateral direction), and in the main body, With the infusion tube attached to the tube attachment portion, the infusion tube is pressurized, and the liquid supply driving unit for supplying the liquid medicine in the infusion tube in the lateral direction is attached to the main body and closed. And an open / close cover that covers the infusion tube attached to the tube attachment portion, and a bubble detection portion that detects air bubbles in the infusion tube attached to the tube attachment portion.
- the second interval for narrowing the flow path of the infusion tube is set to be smaller.
- interval which narrows the flow path of the infusion tube in the downstream rather than a bubble sensor is compared with the 1st space
- the staying phenomenon of the liquid breakage portion of the chemical liquid can be generated not on the bubble sensors but on the downstream side of the bubble sensors. This is because the surface tension of the chemical solution tends to collapse at a portion where the flow rate of the chemical solution changes. Therefore, since a so-called chemical liquid running out portion is not left between the first member and the second member of the bubble sensor, the bubble sensor does not erroneously detect this liquid running out portion. For this reason, it is possible to prevent the bubble sensor from erroneously detecting the presence or absence of bubbles by leaving no part of the chemical solution in the portion where the flow path of the infusion tube is narrowed by the bubble sensor.
- the first member protrudes more downstream than the convex curved surface portion to set the second interval, and a convex curved surface portion formed protruding from the base portion.
- the second member has a convex curved portion that sets the first interval so as to face the convex curved portion of the first member.
- the protruding height of the protruding portion of the first member from the base portion is set larger than the protruding height of the convex curved surface portion from the base portion.
- positioning a 1st member can be set small compared with the 1st space
- 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.
- 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.
- the bubble sensor detects the presence or absence of bubbles in such a manner that the last part of the administered drug solution is not left in the portion where the flow path of the infusion tube is narrowed by the bubble sensor. It is possible to provide an infusion pump capable of preventing the above.
- FIG. 1 The perspective view which shows preferable embodiment of the infusion pump of this invention.
- 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. The figure which shows the cross section in the EE line when the opening-and-closing cover has covered the lower part of the main body as shown in FIG. 1 and FIG.
- FIG. 1 The perspective view which shows the shape of a pressing member.
- FIG. 8 (A) shows the behavior of the chemical solution in the infusion tube when the bubble sensor shown in FIG. 6 in the embodiment of the present invention is used.
- FIG. 8B is a diagram showing the behavior of a chemical solution in an infusion tube when a conventional bubble sensor is used as a comparative example. As the infusion tube is pressed by a conventional bubble sensor, the flow path of the infusion tube is narrowed, and a state where no liquid breakage portion of the chemical solution is generated and a state where the liquid breakage portion is generated are shown. Figure.
- 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 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).
- 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.
- 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.
- 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.
- 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).
- a 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.
- 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.
- An infusion tube 200 made of a flexible thermoplastic resin such as soft vinyl chloride is set in the tube mounting portion 50, and the infusion tube 200 is connected to the tube mounting portion 50 by closing the open / close cover 5. , And can be mounted horizontally along the X direction (liquid feeding direction T).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- an opening / closing operation lever 260 is provided in the upper right part on the surface side of the opening / closing cover 5.
- an infusion tube pressing member 500 On the inner surface side of the opening / closing cover 5, an infusion tube pressing member 500, a first hook member 5D, and a second hook member 5E are provided.
- the infusion tube pressing member 500 is disposed as a long rectangular and planar protrusion along the X direction, and the infusion tube pressing member 500 is in a position facing the liquid feeding drive unit 60.
- the infusion tube pressing member 500 has a flat surface in the X direction along the liquid feeding drive unit 60, and the infusion tube pressing member 500 closes the opening / closing cover 5 in the CR direction, A part of the infusion tube 200 is pressed between them.
- 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 closing the opening / closing cover 5 in the CR direction as shown in FIGS. 1 and 2 after being set in the mounting part 50 and the liquid feeding drive part 60.
- 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.
- the tube clamp portion 270 can block a part of the infusion tube 200 in the middle.
- 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.
- the first infusion tube guide portion 54 can be held by fitting the upstream side 200A of the infusion tube 200
- the second infusion tube guide portion 55 can be held by fitting the downstream side 200B of the infusion tube 200
- the infusion tube 200 can be held. It is held in the horizontal direction along the X direction.
- 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.
- the 1st infusion tube guide part 54 has two euros
- 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.
- 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.
- the medical worker 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.
- 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.
- 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.
- 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
- 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. As will be described later, the ultrasonic wave transmitting section 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.
- 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.
- 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.
- the liquid feeding drive unit 60 is moved by a drive motor 61, a cam structure 62 having a plurality of cams rotated by the drive motor 61, and each cam of the cam structure 62.
- a finger structure 63 having a plurality of fingers.
- the cam structure 62 has a plurality of cams, for example, six cams 62A to 62F, and the finger structure 63 has six fingers 63A to 63F corresponding to the six cams 62A to 62F. is doing.
- the six cams 62A to 62F are arranged with a phase difference from each other, and the cam structure 62 is connected to the output shaft 61A of the drive motor 61.
- the six fingers 63A to 63F advance and retract by a predetermined stroke in the Y direction in a predetermined order, whereby the infusion tube 200 is It is pressed against the infusion tube pressing member 500 of the opening / closing cover 5 along the liquid feeding direction T.
- medical solution in the infusion tube 200 can be liquid-fed in the liquid feeding direction T.
- FIG. That is, when the plurality of fingers 63A to 63F are individually driven, the plurality of fingers 63A to 63F sequentially press the outer peripheral surface of the infusion tube 200 along the liquid feeding direction T to feed the liquid medicine in the infusion tube 200. I do.
- the fingers 63A to 63F are moved forward and backward in sequence, and the blocking point of the infusion tube 200 is moved in the liquid feeding direction T as if the waves are moving.
- the infusion tube 200 is squeezed to transfer the drug solution.
- 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.
- 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.
- 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.
- the bubble detection unit 51 shown in FIG. 5 is also referred to as 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 detection unit 51 is disposed in the receiving member 330.
- the ultrasonic wave transmission part 321 may be arrange
- the ultrasonic wave reception part 331 may be arrange
- the ultrasonic transmission unit 321 and the ultrasonic reception unit 331 are provided with a magnetic (electromagnetic) shield (not shown).
- 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 and the receiving member 330 are both plastic molded products having electrical insulation. As shown in FIG. 5, 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.
- 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, whereby the ultrasonic wave transmittance in the chemical liquid and the ultrasonic wave in the bubbles (or the chemical liquid containing the bubbles). Therefore, the ultrasonic receiving unit 331 of the receiving member 330 detects the difference in transmittance as, for example, an output potential difference from a threshold value, and monitors the presence or absence of bubbles.
- FIG. 6 is a cross-sectional view taken along line EE when the opening / closing cover 5 covers the lower portion 2 of the main body 2 as shown in FIGS.
- FIG. 6 shows the vicinity of the right side surface portion 5K of the opening / closing cover 5 and a part of the lower portion 2B of the main body 2, and a pressing member 320 of the bubble detection unit 51 disposed on the opening / closing cover 5,
- the receiving member 330 of the bubble detection unit 51 faces.
- the pressing member 320 that is the first member of the bubble detection unit 51 has a convex curved surface portion 320W
- the receiving member 330 that is the second member of the bubble detection unit 51 has a convex curved surface portion 330W.
- the curved surface portion 320W and the curved surface portion 330W are in facing positions.
- the intermediate portion 200P of the infusion tube 200 is pressed by a predetermined amount between the convex curved surface portion 320W of the pressing member 320 and the convex curved surface portion 330W of the receiving member 330, and the intermediate portion 200P is elastic. It is deformed.
- the ultrasonic transmission unit 321 of the pressing member 320 and the ultrasonic reception unit 331 of the receiving member 330 face each other.
- FIG. 7 is a perspective view showing the shape of the pressing member 320.
- the pressing member 320 shown in FIG. 7 has a base part 320B, a convex curved surface part 320W, and a protrusion part 320D.
- the base 320B is a rectangular parallelepiped member, and has a screw hole 320N through which a screw for fixing the pressing member 320 is passed.
- the protrusion 320D is located immediately next to the convex curved surface portion 320W and is formed to protrude in the Y direction on the downstream side in the liquid feeding direction T.
- This protrusion 320D has a pressing portion 320R for pressing the middle portion 200P of the infusion tube 200.
- the height H1 at which the pressing portion 320R protrudes from the bottom of the base 320B along the Y direction is higher than the height H2 at which the convex curved surface 320W protrudes from the bottom of the base 320B along the Y direction. It is set large.
- movement at the time of using the infusion pump 1 mentioned above is demonstrated.
- the infusion tube setting direction display unit 150 is viewed to visually set the infusion tube 200. I can confirm.
- 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.
- the medical worker can set the infusion tube 200 correctly 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.
- the open / close cover 5 is closed, so that the open / close cover 5 includes the bubble detection unit 51, the upstream block sensor 52, the downstream block sensor 53, and the liquid feeding drive unit 60.
- the tube clamp part 270 is covered.
- 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.
- FIG. 8A shows the behavior of the chemical solution 171 in the infusion tube 200 when the bubble detection unit 51 shown in FIG. 6 in the embodiment of the present invention is used.
- FIG. 8B shows the behavior of the chemical solution 171 in the infusion tube 200 when a conventional bubble sensor 1500 is used as a comparative example.
- the interval BH1 is between the convex curved surface part 320W of the pressing member 320 and the convex curved surface part 330W of the receiving member 330.
- the gap of the flow path in the middle part 200P of the formed infusion tube 200 is shown.
- Another interval BH2 indicates the gap of the flow path in the intermediate portion 200P of the infusion tube 200 formed between the pressing portion 320R of the protrusion 320D and the opposing wall portion 398 facing the pressing portion 320R. Yes.
- the interval BH2 is located on the downstream side in the liquid feeding direction T compared to the interval BH1.
- the interval BH2 is set smaller than the interval BH1. For this reason, the middle portion 200P of the infusion tube 200 has a narrower flow path (flow path cross-sectional area) at the interval BH2 than at the interval BH1.
- the bubble detector since the interval BH2 smaller than the interval BH1 of the bubble detector 51 is provided on the downstream side of the bubble detector 51 in the liquid feeding direction T, the bubble detector The flow path of the middle portion 200P of the infusion tube 200 on the downstream side of 51 is narrower than the flow path of the middle portion 200P of the infusion tube 200 sandwiched by the bubble detection unit 51.
- the chemical solution 171 does not stay in the flow path of the middle portion 200P of the infusion tube 200 between the bubble detection units 51, but flows in the flow path of the middle portion 200P of the infusion tube 200 on the downstream side of the bubble detection unit 51. Can stay.
- the staying phenomenon of the chemical solution 171 is a phenomenon in which a part of the chemical solution remains as a so-called liquid run-off portion 171M in a narrow portion of the flow path of the infusion tube 200.
- the staying phenomenon of the liquid portion 171M of the chemical solution 171 is not generated between the convex curved surface portion 320W of the pressing member 320 of the bubble detection unit 51 and the convex curved surface portion 330W of the receiving member 330. Further, it is generated positively between the pressing portion 320R of the protrusion 320D on the downstream side of the bubble detecting portion 51 and the opposing wall portion 398 facing the pressing portion 320R. That is, between the pressing part 320R of the protrusion part 320D on the downstream side of the bubble detection part 51 and the opposing wall part 398 facing the pressing part 320R, the flow rate of the chemical liquid 171 changes, and the surface of the chemical liquid 171 Tension tends to collapse.
- the bubble detection unit 51 erroneously detects the liquid breakage portion 171M. Disappears. For this reason, since the liquid breakage part 171M which is a part of the chemical liquid 171 does not remain between the pressing member 320 and the receiving member 330 of the bubble detection unit 51, the ultrasonic wave from the ultrasonic wave transmission unit 321 of the bubble detection unit 51 However, there is no case where the ultrasonic wave receiving part 331 is received by the ultrasonic wave receiving part 171M.
- the bubble detection unit 51 since the bubble detection unit 51 does not determine that there is a chemical in the infusion tube 200, if there is a bubble in the infusion tube 200, the presence of the bubble is detected without being obstructed by the liquid breakage portion 171M. it can. That is, the bubble detection unit 51 can prevent erroneous detection of the presence of the chemical liquid 171 due to the liquid-running portion 171 of the chemical liquid 171.
- the flow path of the infusion tube 200 is narrower on the downstream side of the bubble detection unit 51 than the flow path of the infusion tube 200 formed by the bubble detection unit 51.
- a liquid breakage portion 171M of the chemical liquid 171 can be generated on the downstream side of the bubble detection unit 51.
- a member that presses the midway part 200P is not arranged on the downstream side of the midway part 200P of the infusion tube 200.
- the distance CH1 between the convex curved surface portion 1501W of the pressing member 1501 of the bubble sensor 1500 and the convex curved surface portion 1502W of the receiving member 1502 is an intermediate portion of the infusion tube 200P on the downstream side with respect to the liquid feeding direction T. It is smaller than the inner diameter CH2 of 200P.
- the liquid breakage portion 171N of the chemical liquid 171 is left behind and stays because the flow rate changes between the pressing member 1501 and the receiving member 1502 of the bubble sensor 1500.
- the cut portion 171N is detected.
- the bubble sensor 1500 determines that the chemical liquid 171 is flowing through the infusion tube 200.
- FIG. 9 (A) as shown in FIG. 8 (B), the infusion tube 200 is pressed by the conventional bubble sensor 1500 so that the flow path of the infusion tube 200 is narrowed.
- the liquid running out portion is not generated, and the state where the chemical liquid is normally flowing in the liquid feeding direction T is shown.
- FIG. 9B the flow path of the infusion tube 200 is narrowed because the infusion tube 200 is pressed by the conventional bubble sensor 1500 as shown in FIG. 8B.
- liquid running out portion 171N in FIG. 9B In the case where the liquid running out portion 171N in FIG. 9B is generated, a space AR is formed above the liquid running out portion 171N, and air passes through the space AR, but the liquid running out portion 171N is a bubble. It stays in the sensor 1500.
- the boundary between the liquid breakage portion 171N and the air passes through the portion where the flow path is narrowed by the bubble sensor 1500, the chemical liquid surface tension and the influence of gravity, the chemical liquid suction speed, and the timing of the chemical liquid, A part of the liquid may be caught on the inner surface of the infusion tube 200 and may remain as a liquid running out portion 171N (a part of the liquid medicine).
- the ultrasonic wave from the ultrasonic wave transmitting portion of the bubble sensor is transmitted to the liquid breakage portion 171N and received by the ultrasonic wave receiving portion.
- the control unit erroneously determines that the chemical solution is passing through even though the space (bubble) AR exists in the infusion tube 200.
- the infusion pump 1 includes the main body 2, the tube mounting portion 50 that is disposed in the main body 2, and in which the infusion tube 200 that infuses the drug solution 171 to the patient side is mounted in the lateral direction.
- the infusion tube 200 is pressurized to supply the liquid medicine in the infusion tube 200 in the lateral direction;
- the infusion cover 5 that is attached to the main body 2 and covers the infusion tube 200 that is attached to the tube attachment portion 50 by closing, and the infusion tube that is attached to the tube attachment portion 50 and receives ultrasonic waves generated on the infusion tube 200.
- the bubble detection unit 51 has a bubble detection unit 51 that detects bubbles in the 200.
- the bubble detection unit 51 is disposed on the opening / closing cover 5 and includes a pressing member 320 as a first member having an ultrasonic transmission unit 321 and an ultrasonic wave that is disposed on the main body 2 and receives ultrasonic waves from the ultrasonic transmission unit 321.
- a receiving member 330 as a second member having the receiving unit 31 is provided.
- the second interval BH2 for narrowing the flow path of the infusion tube 200 on the downstream side of the bubble detection unit 51 is set to be small.
- interval BH2 which narrows the flow path of the infusion tube 200 in the downstream rather than the bubble detection part 51 is the 1st space
- the first member is formed to protrude downstream from the convex curved portion 320W in order to set the second interval BH2 and the base 320B, the convex curved portion 320W that protrudes from the base 320B.
- the second member has a convex curved surface portion 330W that faces the convex curved surface portion 320W of the first member and sets a first interval. For this reason, since the protrusion 320D for setting the second interval BH2 is provided integrally with the first member, the number of parts is reduced as compared with the case where the protrusion 320D is provided by a member different from the first member. be able to.
- the protrusion height H1 from the base portion 320B of the protrusion 320D of the first member is set to be larger than the protrusion height H2 from the base portion 320B of the convex curved surface portion 320W. For this reason, the second interval BH2 formed by the protrusion 320D can be set smaller than the first interval BH1 of the bubble detector 51 only by arranging the first member.
- 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.
- the protrusion 320D is provided only on the pressing member 320 side.
- the present invention is not limited to this, and a protrusion is also provided on the receiving member 330 side so that the pressing member 320 side is provided.
- the protrusion 320D and the protrusion on the receiving member 330 side may narrow the flow path of the infusion tube on the downstream side of the bubble sensor. In the example shown in FIGS.
- 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.
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Abstract
Description
このように、輸液チューブの流路を狭くしている部分内に薬液の一部が残ると、気泡センサの超音波発信部からの超音波が、残った薬液の一部を伝わって超音波受信部に受信されてしまう。このため、気泡センサは、輸液チューブ内には薬液があると判断してしまい、輸液チューブ内には気泡があるにもかかわらず、気泡が無いとして気泡の誤検出を起こすおそれがある。
そこで、本発明は、気泡センサにより輸液チューブの流路を狭くしている部分内には、薬液の一部を残さないようにして、気泡センサが気泡の有無の誤検出をすることを防止できる輸液ポンプを提供することを目的とする。
上記構成によれば、第2間隔を設定するための突起部は、第1部材に一体的に設けるので、突起部を第1部材と別の部材で設けるようにする場合に比べて、部品点数を減らすことができる。
上記構成によれば、第1部材を配置するだけで、突起部が形成する第2間隔は、気泡センサの第1間隔に比べて小さく設定することができる。
上記構成によれば、医療従事者は、本体の上部分の表示部の情報を確認しながら、チューブ装着部への輸液チューブの装着を行って、開閉カバーを閉じることができる。そして、医療従事者は、本体の上部分の表示部の情報を確認しながら、操作パネル部の操作ボタンを操作することができる。
尚、以下に述べる実施の形態は、本発明の好適な具体例であるから、技術的に好ましい種々の限定が付されているが、本発明の範囲は、以下の説明において特に本発明を限定する旨の記載がない限り、これらの態様に限られるものではない。
図1は、本発明の輸液ポンプの好ましい実施形態を示す斜視図である。図2は、図1に示す輸液ポンプをW方向から見た斜視図である。
図1と図2に示す輸液ポンプ1は、例えば集中治療室(ICU、CCU,NICU)等で使用され、患者に対して、例えば抗がん剤、麻酔剤、化学療法剤、輸血等、栄養剤等の薬液の微量注入処置を、高い精度で比較的長時間行うことに用いられる微量持続注入ポンプである。この輸液ポンプ1は、例えば薬液ライブラリから使用する薬液を選択して、その選択した薬液を送液するために用いられる。この薬液ライブラリは、薬液ライブラリデータベース(DB)において、予め登録された薬液名を含む薬液の投与設定群である薬液情報である。医療従事者は、この薬液ライブラリを用いることにより、複雑な投与設定をその都度行わなくても良く、薬液の選択および薬液の設定が図れる。
輸液ポンプ1は、本体カバー2と取手2Tを有しており、取手2TはN方向に伸ばしたり送液方向Tに収納したりすることができる。この本体カバー2は、本体ともいい、耐薬品性を有する成型樹脂材料により一体成型されており、仮に薬液等がかかっても輸液ポンプ1の内部に侵入するのを防ぐことができる防滴処理構造を有している。このように、本体カバー2が防滴処理構造を有しているのは、上方に配置されている薬液バッグ170内の薬液171がこぼれ落ちたり、周辺で用いる消毒液等が飛散して付着することがあるためである。
図1と図2に示すように、本体カバー2の上部分2Aには、表示部3と、操作パネル部4が配置されている。表示部3は、画像表示装置であり、例えばカラー液晶表示装置を用いている。この表示部3は、日本語表記による情報表記だけでなく、必要に応じて複数の外国語による情報の表示を行うことができる。表示部3は、本体カバー2の上部分2Aの左上位置であって、開閉カバー5の上側に配置されている。
本体カバー2の上部分2Aは、本体カバー2の上半分の部分である。本体カバー2の下部分2Bは、本体カバー2の下半分の部分である。図2では、表示部3には、一例として薬液投与の予定量(mL)の表示欄3B、薬液投与の積算量(mL)の表示欄3C、充電履歴の表示欄3D、流量(mL)の表示欄3E等が表示されているが、図1に示す表示部3ではこれらの表示内容の図示は、図面の簡単化のために省略している。表示部3は、この他に警告メッセージを表示することもできる。
なお、図1と図2におけるX方向、Y方向、Z方向は互いに直交しており、Z方向は上下方向である。X方向は、送液方向Tと平行であり輸液ポンプ1の左右方向である。Y方向は、輸液ポンプ1の前後方向である。
図3に示すように、チューブ装着部50と送液駆動部60は、輸液ポンプ1の本体下部1B(本体カバー2の下部分2B)に設けられており、チューブ装着部50と送液駆動部60は、表示部3と操作パネル部4の下部においてX方向に沿って設けられている。チューブ装着部50と送液駆動部60は、図2に示すように開閉カバー5を、回転軸5Aを中心としてCR方向に閉じると開閉カバー5により覆うことができる。
図3に示すように、チューブ装着部50は、気泡検出部51と、上流閉塞センサ52と、下流閉塞センサ53と、チューブクランプ部270と、右側位置の第1輸液チューブガイド部54と、左側位置の第2輸液チューブガイド部55を有している。
これにより、医療従事者が、図3の開閉カバー5をCS方向に開けて、チューブ装着部50を開放して、このチューブ装着部50に対して輸液チューブ200を装着する際に、輸液チューブ200による薬液の送液方向Tを明示できる。このため、医療従事者は、目視で確認しながら、誤って輸液チューブ200を逆方向に装着してしまうことを防ぐことができる。
図3に示すように、開閉カバー5は、輸液ポンプ1を軽量化するために、薄い成型樹脂部材により作られている板状の部材である。これにより、開閉カバー5の重量を軽減でき、構造を簡単化することができる。開閉カバー5がチューブ装着部50と送液駆動部60を覆うことができるようにするために、開閉カバー5は、回転軸5Aを中心としてCS方向とCR方向に沿って開閉可能である。すなわち、開閉カバー5は、2つのヒンジ部2H、2Hを用いて、本体2の下部分2Bに対して支持されている。2つのヒンジ部2H、2Hは、第1フック部材5Dと第2フック部材5Eにそれぞれ対応して配置されている。
医療従事者は、表示部3に表示されている表示内容を確認しながら、輸液チューブ200を輸液ポンプ1の本体2の下半分2Bの部分に水平方向に沿ってセットでき、輸液チューブ200がチューブ装着部50と送液駆動部60にセットされた後に、図1と図2に示すように開閉カバー5をCR方向に閉じることで、輸液チューブ200を覆うことができる。
この傾斜案内部54Tを設けることにより、医療従事者は、輸液チューブ200の上流側200Aがこの傾斜案内部54T側にセットされることを、視覚的に確認することができるばかりでなく、輸液チューブ200の上流側200Aは急激に曲げないようにして保持することができる。また、この傾斜案内部54Tが開閉カバー5により覆われずに露出しているので、医療従事者はこの傾斜案内部54Tを直接目視することで、輸液チューブ200の上流側200Aを傾斜案内部54T側に配置すれば良いことを確認できる。
図4に示すように、送液駆動部60は、駆動モータ61と、この駆動モータ61により回転駆動される複数個のカムを有するカム構造体62と、このカム構造体62の各カムにより移動される複数のフィンガを有するフィンガ構造体63を有している。
カム構造体62は、複数のカム、例えば6個のカム62A~62Fを有しており、フィンガ構造体63は、6個のカム62A~62Fに対応して6個のフィンガ63A~63Fを有している。6個のカム62A~62Fは互いに位相差を付けて配列されており、カム構造体62は、駆動モータ61の出力軸61Aに連結されている。
図4に示す制御部100は、電源スイッチボタン4Fと、スイッチ111が接続されている。スイッチ111は、電源コンバータ部112と例えばリチウムイオン電池のような充電池113を切り換えることで、電源コンバータ部112と充電池113のいずれかから制御部100に電源供給する。電源コンバータ部112は、コンセント114を介して商用交流電源115に接続されている。
図5に示す気泡検出部51は、気泡検出センサともいい、輸液チューブ200内における気泡(空気)の有無を検出する。気泡検出部51は、輸液チューブ200内に流れる薬液中に含まれる気泡を監視する超音波センサである。気泡検出部51の超音波発信部321は、押し当て部材320内に配置されている。これに対して、気泡検出部51の超音波受信部331は、受け部材330内に配置されている。なお、超音波発信部321を受け部材330内に配置し、超音波受信部331を、押し当て部材320内に配置してもよい。なお、超音波発信部321,超音波受信部331には、磁気(電磁)シールド(不図示)が施されている。
図5に示すように、押し当て部材320は、開閉カバー5の内側に配置され、受け部材330は、本体2の下部分2Bに配置されている。押し当て部材320の超音波発信部321から発生する超音波は、輸液チューブ200内に流れる薬液に当てることで、薬液における超音波の透過率と、気泡(または、気泡を含む薬液)における超音波の透過率とが異なることから、受け部材330の超音波受信部331は、その透過率の差を、例えば閾値との出力電位差として検出して気泡の有無を監視する。
図6には、開閉カバー5の右側の側面部5K付近と、本体2の下部分2Bの一部を示しており、開閉カバー5に配置されている気泡検出部51の押し当て部材320と、気泡検出部51の受け部材330は対面している。
気泡検出部51の第1部材である押し当て部材320は凸状の曲面部320Wを有しており、気泡検出部51の第2部材である受け部材330は凸状の曲面部330Wを有していて、曲面部320Wと曲面部330Wとは対面位置にある。輸液チューブ200の途中部分200Pは、押し当て部材320の凸状の曲面部320Wと、受け部材330の凸状の曲面部330Wとの間で、所定量だけ押されていて、途中部分200Pは弾性変形している。押し当て部材320の超音波発信部321と受け部材330の超音波受信部331は対面している。
図7に示す押し当て部材320は、基部320Bと、凸状の曲面部320Wと、突起部320Dを有している。基部320Bは、直方体形状の部材であり、押し当て部材320を固定するためのねじを通すねじ穴320Nを有している。基部320Bの一方の面320Fには、凸状の曲面部320WがY方向に突出して形成されている。突起部320Dは、凸状の曲面部320Wのすぐ横の位置であって、送液方向Tの下流側において、Y方向に突出して形成されている。
この突起部320Dは、輸液チューブ200の途中部分200Pを押すための押圧部分320Rを有している。この押圧部分320Rが基部320Bの底部からY方向に沿って突出している高さH1は、凸状の曲面部320Wが基部320Bの底部からY方向に沿って突出している高さH2に比べて、大きく設定されている。
図3に示すように医療従事者が、開閉カバー5を開けてチューブ装着部50に輸液チューブ200を設定する際に、輸液チューブ設定方向表示部150を見て輸液チューブ200のセット方向を目視で確認できる。そして、医療従事者は、開閉カバー5を開けて、輸液チューブ200の上流側200Aを本体下部1Bおいて向かって右側部分の第1輸液チューブガイド部54側にはめ込み、輸液チューブ200の下流側200Bを本体下部1Bにおいて向かって左側部分の第2輸液チューブガイド部55側にはめ込む。これにより、医療従事者は、輸液チューブ200を輸液ポンプ1に対して送液方向Tに沿って正しくセットできる。医療従事者は、図4に示す輸液チューブ200を、第1輸液チューブガイド部54、気泡検出部51と、上流閉塞センサ52、送液駆動部60、下流閉塞センサ53、チューブクランプ部270、そして第2輸液チューブガイド部55に沿って送液方向Tにセットできる。
図8(A)は、本発明の実施形態における図6に示す気泡検出部51を使用した場合の輸液チューブ200内での薬液171の挙動を示している。図8(B)は、比較例として、従来の気泡センサ1500を使用した場合の輸液チューブ200内での薬液171の挙動を示している。
もう1つの間隔BH2は、突起部320Dの押圧部分320Rと、この押圧部分320Rと対向する対向壁部398との間に形成されている輸液チューブ200の途中部分200Pにおける流路の隙間を示している。
この間隔BH2は、間隔BH1に比べて、送液方向Tに関して下流側に位置されている。間隔BH2は、間隔BH1に比べて小さく設定されている。このため、輸液チューブ200の途中部分200Pは、間隔BH1に比べて間隔BH2において、より流路(流路断面積)が狭くなっている。
これに対して、図8(B)に示す比較例の気泡センサ1500では、輸液チューブ200の途中部分200Pの下流側では、途中部分200Pを押圧する部材は配置されていない。このため、気泡センサ1500の押し当て部材1501の凸状の曲面部1501Wと、受け部材1502の凸状の曲面部1502Wとの間隔CH1は、送液方向Tに関して下流側の輸液チューブ200Pの途中部分200Pの内径CH2に比べて小さくなっている。
これにより、薬液171の液切れ部分171Nは、気泡センサ1500の押し当て部材1501と、受け部材1502の間で流速が変化するので取り残されて滞留してしまうことから、気泡センサ1500は、この液切れ部分171Nを検出してしまう。このため、気泡センサ1500は、薬液171が輸液チューブ200内を流れていると判断する。
この気泡検出部51は、開閉カバー5に配置され超音波発信部321を有する第1部材としての押し当て部材320と、本体2に配置され超音波発信部321からの超音波を受信する超音波受信部31を有する第2部材としての受け部材330を備える。そして、開閉カバー5を閉じた状態では、第1部材と第2部材との間で輸液チューブ200の流路を狭めるための第1間隔BH1に比べて、輸液チューブ200の薬液171を送る送液方向Tに関して、気泡検出部51よりも下流側において輸液チューブ200の流路を狭める第2間隔BH2が、小さく設定されている。
このため、第2間隔BH2を設定するための突起部320Dは、第1部材に一体的に設けるので、突起部320Dを第1部材とは別の部材で設ける場合に比べて、部品点数を減らすことができる。
図示例の気泡検出部51では、押し当て部材320側にだけ突起部320Dが設けられているが、これに限らず、受け部材330側にも突起部を設けるようにして、押し当て部材320側の突起部320Dと受け部材330側の突起部が、気泡センサの下流側で、輸液チューブの流路を狭めるようにしても良い。
図1と図2に示す例では、輸液チューブ200は、チューブ装着部50により水平方向である送液方向Tに沿ってセットされているが、これに限らず、例えばチューブ装着部50は、輸液チューブ200の上流側200Aから下流側200Bにかけて所定の角度分下がるように傾斜して横方向にセットするような構造を採用しても良い。
Claims (4)
- 本体と、
前記本体内に配置されて、薬液を患者側に輸液する輸液チューブを水平方向に装着するチューブ装着部と、
前記本体内に配置されて、前記輸液チューブを前記チューブ装着部に装着した状態で、前記輸液チューブを加圧して前記輸液チューブ中の前記薬液を前記水平方向に送液する送液駆動部と、
前記本体に取り付けられ、閉じることで前記チューブ装着部に装着した前記輸液チューブを覆う開閉カバーと、
前記チューブ装着部に装着された前記輸液チューブ内の気泡を検出する気泡検出部と
を有し、
前記気泡検出部は、前記開閉カバーに配置される第1部材と、前記本体に配置される第2部材と、を備え、
前記開閉カバーを閉じた状態で、前記第1部材と前記第2部材との間で前記輸液チューブの流路を狭めるための第1間隔に比べて、前記輸液チューブの前記気泡検出部よりも下流側において前記輸液チューブの流路を狭める第2間隔が、より小さく設定されている ことを特徴とする輸液ポンプ。 - 前記第1部材は、基部と、前記基部から突出して形成された凸状の曲面部と、前記第2間隔を設定するために前記凸状の曲面部よりも前記下流側に突出して形成された突起部とを有し、前記第2部材は、前記第1部材の凸状の曲面部に対面して、前記第1間隔を設定する凸状の曲面部を有することを特徴とする請求項1に記載の輸液ポンプ。
- 前記第1部材の前記突起部の前記基部からの突出高さは、前記凸状の曲面部の前記基部からの突出高さに比べて、大きく設定されていることを特徴とする請求項1または2に記載の輸液ポンプ。
- 前記本体の上部分には、前記表示部と前記操作パネル部が配置され、前記本体の下部分には、前記チューブ装着部と前記送液駆動部と前記開閉カバーが配置されていることを特徴とする請求項1ないし請求項3のいずれかに記載の輸液ポンプ。
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PCT/JP2012/005124 WO2014024236A1 (ja) | 2012-08-10 | 2012-08-10 | 輸液ポンプ |
AU2012387311A AU2012387311B2 (en) | 2012-08-10 | 2012-08-10 | Infusion pump |
JP2014529166A JP6023200B2 (ja) | 2012-08-10 | 2012-08-10 | 輸液ポンプ |
EP12882726.8A EP2883559B1 (en) | 2012-08-10 | 2012-08-10 | Infusion pump |
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SG11201500928WA (en) | 2015-04-29 |
CN104540533B (zh) | 2017-06-30 |
AU2012387311A1 (en) | 2015-03-12 |
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CN104540533A (zh) | 2015-04-22 |
AU2012387311B2 (en) | 2017-07-27 |
EP2883559A4 (en) | 2016-05-11 |
US10029051B2 (en) | 2018-07-24 |
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