WO2021080004A1 - 医療用送液装置 - Google Patents

医療用送液装置 Download PDF

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Publication number
WO2021080004A1
WO2021080004A1 PCT/JP2020/039970 JP2020039970W WO2021080004A1 WO 2021080004 A1 WO2021080004 A1 WO 2021080004A1 JP 2020039970 W JP2020039970 W JP 2020039970W WO 2021080004 A1 WO2021080004 A1 WO 2021080004A1
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WO
WIPO (PCT)
Prior art keywords
rotor
rollers
tube
stator
closed region
Prior art date
Application number
PCT/JP2020/039970
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
憲昭 吉岡
和敏 石橋
悠佑 松本
Original Assignee
株式会社メテク
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社メテク filed Critical 株式会社メテク
Priority to CN202080071333.7A priority Critical patent/CN114514377A/zh
Priority to DE112020005113.7T priority patent/DE112020005113T5/de
Priority to JP2021553575A priority patent/JP7507779B2/ja
Publication of WO2021080004A1 publication Critical patent/WO2021080004A1/ja

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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
    • A61M5/14232—Roller pumps
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F04B43/1261—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing the rollers being placed at the outside of the tubular flexible member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F04B43/1276—Means for pushing the rollers against the tubular flexible member
    • 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
    • A61M2205/3365—Rotational speed
    • 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
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling

Definitions

  • the present invention relates to a medical liquid delivery device having a peristaltic pump.
  • a peristaltic pump that handles a soft tube through which a liquid flows and pumps the liquid in the tube has been known (see Patent Document 1). Since the members of the pump do not come into direct contact with the liquid, this peristaltic pump is used for delivering liquid from a medical liquid feeding device such as an infusion device that infuse a blood product to a patient (see Patent Document 2).
  • a large torque for pumping the liquid is required.
  • a large motor is often used or a reduction gear is added to the motor.
  • the peristaltic pump requires greater torque, especially when pumping a cold liquid, such as a refrigerated blood product, because the tube cures at a low temperature.
  • the peristaltic pump and the device on which the pump is mounted are increased in size and weight, their power consumption is increased, and heat is generated.
  • noise and electromagnetic noise also increase.
  • the number of parts of the pump is increased, and the assemblability, maintainability, and durability are lowered.
  • the present invention has been made in view of this point, and one of the objects thereof is to provide a medical liquid feeding device equipped with a peristaltic pump capable of reducing the torque required when handling a tube. To do.
  • the rotor includes a rotatable rotor and a stator arranged on the outer periphery of the rotor, and the rotor is provided on the outer periphery of the rotor and has a plurality of rollers that rotate together with the rotor.
  • the rotor is arranged on the same circumference of the outer peripheral portion of the rotor at predetermined intervals, and a tube can be arranged between the stator and the rotor, and the tube is rotated by the rotation of the roller accompanying the rotation of the rotor.
  • the peristaltic pump is configured to be removable and the stator is capable of closing the tube by the rollers.
  • the medical liquid feeding device according to any one of (1) to (4), wherein the closed region has an internal angle of (360 ° / number of rollers) ⁇ 0.99 or less.
  • the stator is connected to at least one end of the closed region and further has a buffer region that gradually narrows the gap between the stator and the rotor toward the closed region (1) to (5).
  • the medical liquid delivery device according to any one of the above.
  • the medical liquid feeding device wherein the buffer region has an arc shape having a center different from that of the closed region and is smoothly connected to the closed region.
  • the medical liquid feeding device according to any one of (1) to (7), wherein the roller can move forward and backward with respect to the stator.
  • the medical liquid feeding device according to any one of (1) to (8), which pumps a liquid at 20 ° C. or lower.
  • a medical liquid feeding device including a peristaltic pump capable of reducing the torque required when handling a tube.
  • FIG. 1 is a perspective view showing a pump device 10 including the peristaltic pumps 1 and 2.
  • FIG. 2 is a top view of the peristaltic pump 1.
  • the side of the rotation axis of the rotor of the peristaltic pump where the rotor is exposed is referred to as the upper surface side of the peristaltic pump (Z direction in FIG. 1).
  • the pump device 10 has a square pump accommodating portion 20 in a top view, and a plurality of, for example, two peristaltic pumps 1, 2 are provided side by side in the left-right direction X in the pump accommodating portion 20. ing.
  • the "left-right direction X" is a direction perpendicular to the rotation axes of the rotors of the peristaltic pumps 1 and 2, and is a direction passing through the rotation axes of the two pumps 1 and 2.
  • the pump device 10 has an opening / closing lid 21 that can open / close the upper surfaces (upper surface of the pump accommodating portion 20) of the peristaltic pumps 1 and 2.
  • the peristaltic pump 1 includes a rotor 30 and a stator 31 as shown in FIGS. 1 and 2.
  • the rotor 30 has a circular shape when viewed from above.
  • the rotor 30 has a plurality of, for example, three rollers 40.
  • the three rollers 40 are provided on the same circumference of the rotor 30 at equal intervals.
  • the rotor 30 is connected to a motor 41 provided on the lower side of the rotor 30 and can rotate around the central rotation axis A by driving the motor 41.
  • the roller 40 shown in FIG. 2 can rotate on the same circumference around the rotation axis A as the rotor 30 rotates.
  • the stator 31 is provided on the outer periphery of the rotor 30 on the rear side (upper side of the paper surface in FIG. 2) in the front-rear direction Y.
  • the "front-back direction Y" is a direction perpendicular to the rotation axis A of the rotor 30 and the left-right direction X.
  • the stator 31 has an inner peripheral wall 50 that surrounds a part of the outer circumference on the rear side of the rotor 30.
  • the inner peripheral wall 50 is formed in an arc shape when viewed from above, and a gap D is formed between the inner peripheral wall 50 and the rotor 30 so that a soft tube B can be arranged and is removable.
  • the inner peripheral wall 50 has an arcuate closed region 60 having the same center as the rotation axis A of the rotor 30 and buffer regions 61 provided at both ends of the closed region 60 when viewed from above.
  • the closed area 60 is an area in which the gap D is constant and the rotated roller 40 crushes and closes the tube B.
  • the closed region 60 has an internal angle ⁇ of (360 ° / number of rollers) ⁇ 0.75 or more and less than (360 ° / number of rollers).
  • the internal angle ⁇ is 90 ° or more and less than 120 °.
  • the internal angle ⁇ of the closed region 60 is preferably (360 ° / number of rollers) ⁇ 0.83 or more and less than (360 ° / number of rollers). In this case, when there are three rollers 40 as in the present embodiment, the internal angle ⁇ is 100 ° or more and less than 120 °. In this case, the peristaltic pump 1 has appropriate pump performance at a low flow rate of 80 mL / min or higher.
  • the internal angle ⁇ of the closed region 60 is more preferably (360 ° / number of rollers) ⁇ 0.90 or more and less than (360 ° / number of rollers).
  • the internal angle ⁇ is 108 ° or more and less than 120 °.
  • the peristaltic pump 1 has appropriate pump performance at a low flow rate of 0.2 mL / min or higher.
  • the closed area 60 has an internal angle of (360 ° / number of rollers) ⁇ 0.99 or less, preferably (360 ° / number of rollers) ⁇ 0.97 or less, and more preferably (360 ° / number of rollers) ⁇ 0.94 or less. It is preferable to have ⁇ .
  • the internal angle ⁇ of the closed region 60 is set to (360 ° / number of rollers) ⁇ 0.99 or less, the torque can be reliably reduced, and the internal angle ⁇ of the closed region 60 is set to (360 ° / number of rollers). ) ⁇ 0.97 or less, the torque can be sufficiently reduced, and when the internal angle ⁇ of the closed region 60 is (360 ° / number of rollers) ⁇ 0.94 or less, the torque is further reduced. Can be done.
  • the buffer region 61 has a gap D wider than the closed region 60, and the gap D is formed so as to gradually narrow toward the closed region 60.
  • the buffer region 61 has an arc shape when viewed from above, and is smoothly connected to the closed region 60.
  • the closed region 60 and the buffer region 61 extend along the front-rear direction Y in a top view, and are symmetrical with respect to the virtual line C passing through the rotation axis A of the rotor 30.
  • the peristaltic pump 1 further includes a positioning portion 70 for positioning the tube B.
  • the positioning unit 70 introduces, for example, a tube B located on the upstream side of the stator 31 from the front side (lower side of the paper surface in FIG. 2) in the front-rear direction Y with respect to the peristaltic pump 1 and guides the tube B to the stator 31.
  • a second positioning portion 81 for leading the portion 80 and the tube B located on the downstream side of the stator 31 to the front side of the peristaltic pump 1 is provided.
  • the tube B is introduced from the front side to the rear side with respect to the peristaltic pump 1 in a top view, is folded back in an arc shape at the stator 31, and is led out from the rear side to the front side.
  • the stator 31 is configured to be able to move forward and backward in the front-rear direction Y with respect to the rotor 30.
  • the stator 31 can handle the tube B by holding the tube B in the gap D with the rotor 30.
  • the first position P1 shown in FIG. 2 and the rear side of the rotor 30 from the first position P1. It can move forward and backward with and from the second position P2 shown in FIG.
  • the stator 31 retracts from the first position P1 to the second position P2 by pulling the lever 90 provided on the peristaltic pump 1, for example, and returns the lever 90 to the second position P2 to the second position P2. Return to position P1 of 1.
  • the peristaltic pump 2 may have the same configuration as the peristaltic pump 1 or may have a different configuration. When having different configurations, the peristaltic pump 2 may be configured such that, for example, the internal angle ⁇ of the closed region 60 of the stator 31 is (360 ° / number of rollers) or more. Other configurations may be the same as those of the peristaltic pump 1.
  • the tube B When operating the peristaltic pump 1, the tube B is first set in the peristaltic pump 1. At this time, the stator 31 is retracted with respect to the rotor 30 by the lever 90, moved from the first position P1 to the second position P2, and the tube B is arranged in the gap D between the stator 31 and the rotor 30 and the positioning portion 70. To do. After that, the stator 31 is advanced with respect to the rotor 30 and returned to the first position P1. As a result, as shown in FIG. 4, the tube B is gripped between the rotor 30 and the stator 31.
  • the roller 40 enters one of the buffer regions 61 of the stator 31, passes through the closed region 60, and exits from the other buffer region 61.
  • the roller 40 gradually closes the tube B in one of the buffer regions 61, and closes the tube B in the closed region 60.
  • the rotor 40 moves while closing the tube B in the closed region 60, and at this time, the tube B is handled and the fluid inside is sent to the downstream side.
  • the roller 40 passes through the closed region 60 and enters the other buffer region 61, the roller 40 gradually releases the tube B.
  • the liquid inside the tube B is continuously fed, and the liquid in the tube B is pressure-fed at a predetermined flow rate.
  • FIG. 5 is a perspective view showing an example of the infusion device 100
  • FIG. 6 is an explanatory view showing the infusion system 110 of the infusion device 100.
  • the infusion device 100 includes a substantially rectangular parallelepiped device main body 120, casters 121, a pole 122 extending upward from the device main body 120, and the like.
  • the apparatus main body 120 is provided with a setting screen 130, a pump installation unit 131, a heating unit 132, and the like.
  • the pump installation unit 131 is provided on the side surface 120a of the device main body 120, and the above-mentioned pump device 10 is installed on the pump installation unit 131.
  • the pump device 10 is installed, for example, on the side surface 120a of the main body 120 so that the left-right direction X is the horizontal direction, the front of the front-rear direction Y is the bottom, and the back of the front-rear direction Y is the top.
  • stator 31 of the peristaltic pump 1 is located above the rotor 30.
  • a heating device 151 which will be described later, is installed in the heating unit 132.
  • a liquid bag 170 which will be described later, is hung from the pole 122.
  • the infusion system 110 includes a liquid container 150 for accommodating a blood product as a liquid for infusion, a heating device 151 for heating the blood product, and a bubble removing chamber for removing air bubbles in the blood product.
  • the peristaltic pump 1 of the above, the peristaltic pump 2 as a second pump provided in the third flow path 156, the control device 160, and the like are provided.
  • the liquid container 150 is connected to, for example, a liquid bag 170 which is a source of blood products.
  • the liquid container 150 is provided with a filter 171 for removing unnecessary components of the blood product flowing out to the first flow path 153.
  • the heating device 151 includes a heating flow path 180 through which a blood product flows, and a hot plate 181 that contacts and supplies heat to the heating flow path 180.
  • the heating flow path 180 is configured in a flexible tube shape, for example, and is arranged so as to meander in the heating device 151.
  • the second flow path 154 and the fourth flow path 157 are connected to the upper part of the bubble removal chamber 152, and the third flow path 156 is connected to the lower part of the bubble removal chamber 152.
  • the first flow path 153, the second flow path 154, the third flow path 156, and the fourth flow path 157 are composed of a soft and flexible tube B.
  • the peristaltic pumps 1 and 2 have a liquid feeding capacity of, for example, 50 mL / min or more, preferably 10 mL / min or more, and more preferably 0.2 mL / min or more.
  • the operation of the peristaltic pumps 1 and 2 is controlled by the control device 160.
  • the control device 160 is, for example, a general-purpose computer, and can control the peristaltic pumps 1, 2, and the like by executing a program recorded in the memory on the CPU to execute the infusion operation of the infusion device 100 and the infusion system 110.
  • the liquid bag 170 in which the low-temperature blood product is stored is connected to the liquid container 150, and the blood product of the liquid bag 170 is placed in the liquid container 150. It is stored.
  • the peristaltic pumps 1 and 2 are operated, and the blood product of the liquid container 150 is sent to the heating device 151 through the first flow path 153.
  • the heating device 151 the blood product passes through the heating flow path 180, and at that time, the blood product is heated to a predetermined temperature close to the body temperature by the hot plate 181.
  • the blood product heated by the heating device 151 passes through the second flow path 154 and flows into the bubble removing chamber 152.
  • Bubbles generated in the blood product in the heating device 151 are captured by the bubble removing chamber 152. Some blood products and gases in the bubble removal chamber 152 are returned to the liquid container 150 through the fourth flow path 157. The blood product in the bubble removal chamber 152 passes through the third flow path 156 by the peristaltic pump 2 and is infused from the infusion unit 155 to the patient. The amount of infusion to the patient is controlled by adjusting the flow rate of the peristaltic pump 2.
  • the closed region 60 of the stator 31 has an internal angle ⁇ of less than (360 ° / number of rollers), the closed region 60 is shortened with respect to the distance between the plurality of rollers 40 (closed region). The distance between the rollers 40 with respect to 60 becomes wider), and the torque required for closing and handling the tube B can be reduced.
  • the peristaltic pump 1 and the infusion device 100 on which the peristaltic pump 1 is mounted become larger and heavier, their power consumption increases, the calorific value increases, and noise / electromagnetic noise. It is suppressed that the number of parts is increased and the number of parts is increased to reduce the ease of assembly, maintainability, and durability. Since the amount of heat generated can be suppressed, the user does not get burned by touching the peristaltic pump 1. Further, the temperature of the pump accommodating portion 20 does not rise too much, and the liquid in the tube B does not denature.
  • FIG. 7 is an experimental result for verifying the relationship between the internal angle ⁇ of the closed region 60 of the peristaltic pump 1 and the required torque according to the present embodiment.
  • a torque meter is connected between the rotor 30 of the peristaltic pump 1 and the motor 41, and the value of the torque meter when the rotor 30 is driven by the motor 41 and the tube B is handled is detected, and the maximum value thereof is detected.
  • This experiment was performed under the conditions of an environmental temperature of 25 ° C., a liquid temperature of tube B of 25 ° C., and a flow rate of 600 mL / min. As is clear from the experimental results of FIG.
  • a general peristaltic pump has an internal angle in which the closed region of the stator exceeds (360 ° / number of rollers). That is, the conventional peristaltic pump is set so that the roller is always present in the closed region of the stator and continues to handle the tube.
  • the present inventors have confirmed that the peristaltic pump functions as a pump even if the closed region 60 of the stator 31 has an internal angle ⁇ of less than (360 ° / number of rollers) as in the present embodiment. There is.
  • FIG. 8 is an experimental result for verifying the relationship between the internal angle ⁇ of the closed region 60 of the peristaltic pump 1 and the discharge pressure according to the present embodiment.
  • the discharge pressure was measured by installing a pressure gauge on the tube B on the outlet side of the peristaltic pump 1. This experiment was performed under the conditions of an environmental temperature of 25 ° C. and a flow rate of 0.2 mL / min.
  • a discharge pressure equal to or higher than a specified value can be obtained.
  • the specified value is determined by an empirical rule or the like, and is, for example, a predetermined value of about 700 mmHg.
  • the appropriate pump performance is further performed at a low flow rate of 0.2 ml / min or more (moving speed 0.1 mm / sec or more). Can be maintained and the flow rate range with proper pump performance is further widened.
  • a medical device such as an infusion device
  • when the administration solution is to be slowly administered for example, flow rate 0.2 mL / min, movement speed 0.1 mm / sec
  • it is desired to be rapidly administered for example, flow rate 100 mL
  • the internal angle ⁇ of the closed region 60 is (360 ° / number of rollers) ⁇ 0.90 or more, it can sufficiently correspond to a medical device that requires a wide flow rate range.
  • the torque required for the peristaltic pump 1 to close and handle the tube B can be sufficiently reduced. it can.
  • the stator 31 is connected to the end of the closed region 60 and has a buffer region 61 that gradually narrows the gap D between the stator 31 and the rotor 30 toward the closed region 60.
  • the roller 40 can gradually close the tube B as it approaches the closing region 60, so that the resistance for closing the tube B becomes small, and the torque required for handling the tube B is further reduced.
  • it is possible to reduce sudden fluctuations in the load applied to the pump and improve durability.
  • the buffer region 61 Since the buffer region 61 has an arc shape having a center different from that of the closed region 60 and is smoothly connected to the closed region 60, the resistance for closing the tube B of the roller 40 is increased between the buffer region 61 and the closed region. There is no sudden fluctuation near the connection of 60. As a result, the torque required for the roller 40 to handle the tube B can be further reduced.
  • the tube B can be easily attached.
  • the peristaltic pump 1 pumps a liquid at 20 ° C or lower.
  • a liquid of 20 ° C. or lower such as a blood product
  • the tube B becomes cold and hardens, and a larger torque is required when handling the tube B.
  • the torque can be reduced.
  • the infusion device 100 includes a peristaltic pump 1. Since the infusion device 100 needs to send a low-temperature blood product at a large flow rate, there is a great merit of applying the peristaltic pump 1 to the infusion device 100. That is, the infusion device 100 equipped with the peristaltic pump 1 becomes larger and heavier, its power consumption increases, the amount of heat generated increases, noise and electromagnetic noise increase, and the number of parts increases. Is increased, and deterioration of assemblability, maintainability, and durability is suppressed.
  • the roller 40 of the rotor 30 may move forward and backward with respect to the stator 31.
  • the rotor 30 includes a top plate 200 and a bottom plate 201 that support the rollers 40 with the rollers 40 in between.
  • the top plate 200 and the bottom plate 201 have a circular shape having the same diameter and face each other.
  • the top plate 200 and the bottom plate 201 are connected to each other by a central axis 202 extending in the axial direction Z.
  • Each roller 40 has a shaft frame 203 that penetrates the center of the roller 40 in the axial direction Z, and is supported by the top plate 200 and the bottom plate 201 via the shaft frame 203.
  • Through holes 204 through which the shaft frame 203 of each roller 40 is inserted are formed in the top plate 200 and the bottom plate 201.
  • the through hole 204 is an elongated hole long in the radial direction R of the rotor 30 (top plate 200 and bottom plate 201).
  • the shaft frame 203 of the roller 40 can move in the radial direction R in the through hole 204, and the roller 40 can move in the radial direction R of the rotor 30.
  • a spring 205 is provided as an elastic body that urges the shaft frame 203 of the roller 40 in the outward direction in the radial direction R.
  • the spring 205 is, for example, a C-shaped linear spring, and three springs 205 are provided for each shaft frame 203 of the roller 40. One end of each spring 205 is connected to the shaft frame 203 of the roller 40, and the other end is constrained to, for example, a peripheral member of the central shaft 202.
  • the roller 40 can move forward and backward toward the stator 31, and is always urged in the direction of crushing the tube B (outward direction of the radial direction R). Then, the roller 40 moves to a position where the force is balanced with respect to the tube B.
  • the roller 40 is movable by the length of the through hole 204, and the maximum moving position (distance) is also regulated by the through hole 204.
  • the roller 40 can move forward and backward with respect to the stator 31, the work of removing the tube B becomes easy. Further, since the roller 40 is urged by the spring 205, the tube B can be pressed with a constant load. For example, even if the temperature of the liquid flowing through the tube B changes and the rigidity of the tube B changes, the roller The pumping torque required for the rotation of 40 does not become too large. As a result, it is possible to prevent the liquid from being unable to be sent due to, for example, damage to the pump 1 or insufficient torque of the motor.
  • the temperature change of the liquid flowing through the tube B may occur when a low-temperature liquid such as a blood product stored in a refrigerator or an infusion solution heated to about 37 ° C. is flowed.
  • the peristaltic pump 1 in the above embodiment has three rollers 40, but the number of rollers 40 is not limited to three, and may be two, four, five, or six or more. Good.
  • the rollers 40 may not be arranged at equal intervals on the same circumference around the rotation axis A.
  • the configuration of the pump device 10, the infusion device 100, and the infusion system 110 is not limited to this.
  • the liquid for infusion delivered by the infusion device 100 is a blood product, but is not limited to this, and may be, for example, fresh frozen plasma (FFP), albumin, extracellular fluid, or the like.
  • the peristaltic pump 1 may be mounted on a medical liquid delivery device other than the infusion device 100.
  • the peristaltic pump 1 may be provided in a medical liquid delivery device such as a blood purification device, a plasma exchange device, an ascites filtration / concentration device, and an infusion pump.
  • the present invention is useful in providing a peristaltic pump capable of reducing the torque required when handling a tube.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Reciprocating Pumps (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • External Artificial Organs (AREA)
PCT/JP2020/039970 2019-10-23 2020-10-23 医療用送液装置 WO2021080004A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202080071333.7A CN114514377A (zh) 2019-10-23 2020-10-23 医疗用送液装置
DE112020005113.7T DE112020005113T5 (de) 2019-10-23 2020-10-23 Medizinische Fluidabgabevorrichtung
JP2021553575A JP7507779B2 (ja) 2019-10-23 2020-10-23 医療用輸液装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019192865 2019-10-23
JP2019-192865 2019-10-23

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