CN114470384A - Negative pressure type extracorporeal circulation blood suction system - Google Patents

Negative pressure type extracorporeal circulation blood suction system Download PDF

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Publication number
CN114470384A
CN114470384A CN202210148217.1A CN202210148217A CN114470384A CN 114470384 A CN114470384 A CN 114470384A CN 202210148217 A CN202210148217 A CN 202210148217A CN 114470384 A CN114470384 A CN 114470384A
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CN
China
Prior art keywords
blood
negative pressure
extracorporeal circulation
recovery tank
suction
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Pending
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CN202210148217.1A
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Chinese (zh)
Inventor
汪勃
刘侠丽
谭赵霞
杜磊
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West China Hospital of Sichuan University
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West China Hospital of Sichuan University
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Priority to CN202210148217.1A priority Critical patent/CN114470384A/en
Publication of CN114470384A publication Critical patent/CN114470384A/en
Pending legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621Extra-corporeal blood circuits
    • A61M1/3624Level detectors; Level control

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Cardiology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • External Artificial Organs (AREA)

Abstract

The invention relates to the technical field of medical equipment and discloses a negative pressure type extracorporeal circulation blood suction system which comprises a negative pressure suction device, a blood recovery tank, a rolling pump and an extracorporeal circulation blood storage tank, wherein the negative pressure suction device comprises a suction pipe, a suction pipe and a suction pipe; the top of the blood recovery tank is provided with a sealing cover, the sealing cover is provided with a connecting port, and the connecting port is communicated with a blood suction tube in the body; the negative pressure suction device is communicated with the blood recovery tank and is used for sucking intracardiac blood into the blood recovery tank; the bottom of the blood recovery tank is provided with a blood outlet, the blood outlet of the blood recovery tank is communicated with the extracorporeal circulation blood storage tank through a pump pipe of a roller pump, and the roller pump pumps the blood in the blood recovery tank into the extracorporeal circulation blood storage tank. According to the negative-pressure extracorporeal circulation blood suction system, the negative-pressure suction device is used for replacing a roller pump to recover operative field blood, so that blood damage is greatly reduced; the internal blood suction tube is directly connected with the blood recovery tank, so that the length of the artificial material pump tube is reduced, and the blood activation and inflammatory reaction are reduced.

Description

Negative pressure type extracorporeal circulation blood suction system
Technical Field
The invention relates to the technical field of medical equipment, in particular to a negative pressure type extracorporeal circulation blood suction system.
Background
In heart surgery under extracorporeal circulation, in order to make the surgical field clear and facilitate the surgical operation, currently, a roller pump is used in heart surgery under extracorporeal circulation all over the world to realize the recovery of blood inside and outside the surgical center. The rolling pump is mainly composed of an arc pump groove, an axis, a rotating arm and a roller. The principle that a rolling pump generates attraction force on blood is as follows: firstly, a circle of pump pipes are wound in a pump groove, a driving motor is connected inside an axle center to drive a rotating arm to rotate, and the rotating arm is provided with a roller which always extrudes the pump pipes at any time so as to generate continuous attraction force to blood.
The roller press pump for recycling the blood inside and outside the heart in the heart operation under the extracorporeal circulation has the following defects: (1) the rolling pump generates attraction force for continuous mechanical extrusion of the pump tube, thereby causing serious blood damage; (2) the pump tube made of artificial materials can activate blood to generate systemic inflammatory reaction, the wound ring shape of the pump tube is arranged in the pump groove, the length of the pump tube made of artificial materials is increased, and the blood activation is undoubtedly promoted to aggravate the systemic inflammatory reaction; (3) the rolling pump can not effectively realize the effect of multiple pipes in one pump, a plurality of suction apparatuses are needed to recover blood inside and outside the heart during special heart operations, at the moment, the number of the rolling pumps can only be increased on the original basis, and the complex operation of arranging the pump pipes is needed, the time is life when the bleeding is violent, the medical efficiency is reduced to a great extent due to the defect of the rolling pump, and most importantly, the irreparable disaster ending caused by the life safety hazard of patients can be caused; (4) the suction force of the rolling pump is not intelligently controlled, the rolling pump can only mechanically keep a constant suction force value, if the suction force needs to be adjusted, a pump head tightness knob needs to be manually rotated, when the pump tube is compressed by a roller to indicate that the suction force is too large or the head end of the pump tube is in a blocking state, the rolling pump can still continuously give the suction force, and at the moment, if the suction force is not effectively and controllably adjusted, blood can be excessively damaged and cardiac muscle can be seriously and mechanically damaged. (5) At present, blood inside and outside the heart is directly pumped into a blood storage tank through a rolling pump, and although the blood storage tank is provided with a filter screen, the recovered blood is not filtered, so that large foreign matters, tissues and tumor fragments generated in the operation process can block the filter screen of the blood storage tank, and disastrous results can be generated. (6) The rolling pump has large volume, not only occupies the space of an operating room, but also unnecessarily increases the operating range of extracorporeal circulation personnel; the rolling pump is heavy and is extremely inconvenient to transport and move; (7) the installation is loaded down with trivial details, and the pump line needs wall-mounted formula winding roll extrusion pump groove round, and the blood is retrieved the pipeline direction and must be unanimous with roll extrusion pump direction of rotation, otherwise the connection direction is wrong, has intracardiac air admission, and then important organ risk of admitting air.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a negative pressure type extracorporeal circulation blood suction system.
In order to realize the technical purpose, the invention adopts the technical scheme that:
a negative pressure type extracorporeal circulation blood suction system comprises a negative pressure suction device, a blood recovery tank, a rolling pump and an extracorporeal circulation blood storage tank; the top of the blood recovery tank is provided with a sealing cover, the sealing cover is provided with a connecting port, and the connecting port is communicated with a blood suction tube in the body; the negative pressure suction device is communicated with the blood recovery tank and is used for sucking intracardiac blood into the blood recovery tank; the bottom of the blood recovery tank is provided with a blood outlet, the blood outlet of the blood recovery tank is communicated with the extracorporeal circulation blood storage tank through a pump pipe of a roller pump, and the roller pump pumps the blood in the blood recovery tank into the extracorporeal circulation blood storage tank.
Furthermore, the tank body of the blood recovery tank is streamline, and the bottom of the tank body is in a slender neck shape.
Further, a filter screen is arranged at the top of the blood recovery tank.
Furthermore, the filter screen is concave in the middle.
Further, still include weighing module and liquid level detection module, weighing module is arranged in measuring blood recovery jar blood weight, liquid level detection module is arranged in monitoring blood recovery jar blood liquid level, weighing module, liquid level detection module and rolling pump communication connection.
Further, the weighing module comprises a liquid weighing rod, a weight chip controller is arranged above the liquid weighing rod, the controller is transversely connected with a fixing ring, and the blood recovery tank is arranged in the fixing ring.
Preferably, the liquid level detection module is a liquid level monitoring patch sensor and is arranged on the outer side wall of the blood recovery tank.
Further, still include the fixing device that internal blood attracted the pipe, fixing device includes base, montant and can follow the fixed platform of montant aversion from top to bottom, the last pipe clamp that is provided with of fixed platform, the pipe clamp solid internal blood attracted the pipe.
Furthermore, the pipeline clamp is a reducing pipeline clamp, and an electric telescopic column is arranged in a clamping groove of the pipeline clamp.
Further, still include intraductal pressure regulation and control platform, be provided with the pressure monitoring point on the internal blood attracts the pipe, the intraductal real-time pressure condition of intraductal pressure regulation and control platform monitoring pressure monitoring point department, intraductal pressure regulation and control platform and negative pressure suction device communication connection, intraductal pressure regulation and control platform passes through the pressure condition regulation and control negative pressure suction device's of pressure monitoring point department suction dynamics.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention replaces a roller pump with a negative pressure suction device to recover the blood in the surgical field, thereby greatly reducing the damage of the blood; the in vivo blood suction tube is directly connected with the blood recovery tank, so that the length of the artificial material pump tube is reduced, and the blood activation and inflammatory reaction are reduced; the negative pressure suction device provides the driving force for blood recovery, so that a negative multi-tube can be realized, namely, a negative pressure source can provide a multi-channel blood recovery pipeline to recover blood;
2) the blood recovery tank with the filter screen is bridged between the in-vivo blood suction tube and the extracorporeal circulation blood storage tank, so that the disaster risk that foreign matters, tissue fragments and tumor bodies block the extracorporeal circulation blood storage tank in the operation is avoided;
3) the invention provides an intra-tube pressure regulation and control platform which can sensitively monitor real-time pressure in a blood suction tube in a body, flexibly and effectively control the pressure in a tube through a tube reducing clamp, further effectively release the pressure under the condition of plugging the tail end of the tube and avoid the risk of myocardial injury;
4) the weighing module is used for transmitting a blood weight signal source in the blood recovery tank to the controller and then transmitting a conductive signal to the rolling pump to control the pump speed so as to recover the blood in the blood recovery tank in real time, so that the blood volume in the blood recovery tank keeps a constant plane, and the sufficient blood volume in the extracorporeal circulation blood storage tank can be intelligently, quickly and effectively ensured under the condition of sudden heavy bleeding, and the whole process of extracorporeal circulation is stable and safe;
5) the negative pressure type extracorporeal circulation blood recovery device system is small in size, the limited space of an operating room is greatly saved, and the device is light in design process and construction materials and very convenient to transport and move; the installation is extremely simple and convenient, and internal blood attracts the pipe and directly links to each other with blood recovery jar, not only reduces the manpower extravagant, does not have the pipeline direction in addition and connects the mistake, leads to intracardiac risk of admitting air.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the pipe clamp;
FIG. 3 is a schematic diagram of another embodiment of a conduit clamp.
Reference numerals: 1-internal blood suction tube, 10-negative pressure suction device, 20-blood recovery tank, 21-sealing cover, 22-connecting port, 23-blood outlet, 24-filter screen, 30-rolling pump, 31-pump tube, 40-extracorporeal circulation blood storage tank, 50-weighing module, 51-liquid weighing rod, 52-controller, 53-fixing ring, 60-liquid level detection module, 70-fixing device, 71-pipeline clamp, 72-electric telescopic rod, 73-ellipsoid, 80-internal pressure control platform, and 81-pressure monitoring point.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1, the negative pressure extracorporeal circulation blood suction system of the present invention comprises a negative pressure suction device 10, a blood recovery tank 20, a roller pump 30, and an extracorporeal circulation blood storage tank 40; the top of the blood recovery tank 20 is provided with a sealing cover 21, the sealing cover 21 is provided with a connecting port 22, and the connecting port 22 is communicated with the blood suction tube 1 in the body; the negative pressure suction device 10 comprises a negative pressure source and a negative pressure regulator, and the negative pressure suction device 10 is communicated with the blood recovery tank 20 and is used for sucking intracardiac blood into the blood recovery tank 20; the bottom of the blood recovery tank 20 is provided with a blood outlet 23, the blood outlet 23 of the blood recovery tank is communicated with an extracorporeal blood storage tank 40 through a pump pipe 31 of a roller pump 30, and the roller pump 30 pumps the blood in the blood recovery tank 20 into the extracorporeal blood storage tank 40.
The blood recovery tank 20 is streamlined, the bottom of the tank body is in a slender neck shape, and blood is not easy to hang on the wall and remain; furthermore, the top of the blood recovery tank is provided with a filter screen 24 which can filter foreign matters, tissue fragments and tumor bodies in blood during operation so as to prevent the foreign matters, the tissue fragments and the tumor bodies from blocking the extracorporeal circulation blood storage tank; preferably, the filter screen 24 is concave in the middle, so that the blood filtering area can be increased, and the filtering speed can be increased.
Still include weighing module 50 and liquid level detection module 60, weighing module 50 is arranged in measuring blood recovery jar 20 blood weight, liquid level detection module 60 is arranged in monitoring blood recovery jar 20 blood liquid level, weighing module 50, liquid level detection module 60 and rolling pump 30 communication connection, weighing module 50 feeds back blood weight in the blood recovery jar in real time and gives rolling pump 30, and rolling pump 30 is according to blood weight adjusts the blood pump speed in retrieving the blood recovery jar in real time, makes the blood volume in the blood recovery jar 20 keep invariable plane, if meet under the proruption heavy bleeding condition, can be intelligent, quick, effectively guarantee that the blood volume is sufficient in the extracorporeal circulation blood storage jar 40 for the whole process of extracorporeal circulation is steady safe.
Specifically, weighing module 50 includes liquid weighing rod 51, liquid weighing rod 51 top is provided with weight chip controller 52, and controller 52 transverse connection has solid fixed ring 53, blood recovery jar 20 is arranged in gu fixed ring 53, liquid weighing rod 51 can feed back blood weight in the blood recovery jar 20 in real time. The liquid level detection module 60 is a liquid level monitoring patch sensor, is arranged on the outer side wall of the blood recovery tank and is used for detecting the blood liquid level in the blood recovery tank.
Still include the fixing device 70 of internal blood suction tube 1, fixing device 70 includes base, montant and can follow the fixed platform of montant aversion from top to bottom, the last pipe clamp 71 that is provided with of fixed platform, pipe clamp 71 clamp solid internal blood suction tube 1 makes internal blood suction tube 1 keep the relative position motionless. Further, the pipe clamp 71 is a reducing pipe clamp, as shown in fig. 2, an electric telescopic column 72 is arranged in a clamping groove of the pipe clamp 71, and the electric telescopic column 72 moves up and down to squeeze the internal blood suction tube 1 in the pipe clamp 71, so that the reducing of the internal blood suction tube 1 is realized; or as shown in fig. 3, an ellipsoid 73 is arranged in the clamping groove of the pipeline clamp 71, a rotating shaft of a rotating motor is connected below the ellipsoid 73, the rotating motor is started, the rotating shaft rotates to drive the ellipsoid 73 to rotate, and the diameter change of the in-vivo blood suction tube 1 above the ellipsoid 73 is realized.
Still include intraductal pressure regulation and control platform 80, be provided with pressure monitoring point 81 on the internal blood suction pipe 1, the intraductal real-time pressure condition of intraductal pressure regulation and control platform 80 monitoring pressure monitoring point 81 department, intraductal pressure regulation and control platform 80 and negative pressure suction device 10 communication connection, the pressure condition of intraductal pressure regulation and control platform 80 department through pressure monitoring point 81 department regulates and control the suction force degree of negative pressure suction device 10. The intraductal pressure regulation and control platform 80 still is connected with the motor electricity in the pipe clamp 71, intraductal pressure regulation and control platform 80 passes through the operating condition control motor of the pressure condition control of pressure monitoring point 81 department, realizes the reducing regulation and control of pipe clamp 71 to internal blood suction tube 1.
The invention replaces a roller pump with a negative pressure suction device to recover the blood in the surgical field, thereby greatly reducing the damage of the blood; the in vivo blood suction tube is directly connected with the blood recovery tank, so that the length of the artificial material pump tube is reduced, and the blood activation and inflammatory reaction are reduced; the negative pressure suction device provides the driving force for blood recovery, so that a negative multi-tube can be realized, namely, a negative pressure source can provide a multi-channel blood recovery pipeline to recover blood; the blood recovery tank with the filter screen is bridged between the in-vivo blood suction tube and the extracorporeal circulation blood storage tank, so that the disaster risk that foreign matters, tissue fragments and tumor bodies block the extracorporeal circulation blood storage tank in the operation is avoided; the invention provides an intra-tube pressure regulation and control platform which can sensitively monitor real-time pressure in a blood suction tube in a body, flexibly and effectively control the pressure in a tube through a tube reducing clamp, further effectively release the pressure under the condition of plugging the tail end of the tube and avoid the risk of myocardial injury; the weighing module is used for transmitting a blood weight signal source in the blood recovery tank to the controller and then transmitting a conductive signal to the rolling pump to control the pump speed so as to recover the blood in the blood recovery tank in real time, so that the blood volume in the blood recovery tank keeps a constant plane, and the sufficient blood volume in the extracorporeal circulation blood storage tank can be intelligently, quickly and effectively ensured under the condition of sudden heavy bleeding, and the whole process of extracorporeal circulation is stable and safe; the negative pressure type extracorporeal circulation blood recovery device system is small in size, the limited space of an operating room is greatly saved, and the device is light in design process and construction materials and very convenient to transport and move; the installation is extremely simple and convenient, and internal blood attracts the pipe and directly links to each other with blood recovery jar, not only reduces the manpower extravagant, does not have the pipeline direction in addition and connects the mistake, leads to intracardiac risk of admitting air.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.

Claims (10)

1. The utility model provides a negative pressure formula extracorporeal circulation blood suction system which characterized in that: comprises a negative pressure suction device (10), a blood recovery tank (20), a rolling pump (30) and an extracorporeal circulation blood storage tank (40); the top of the blood recovery tank (20) is provided with a sealing cover (21), the sealing cover (21) is provided with a connecting port (22), and the connecting port (22) is communicated with the internal blood suction tube (1); the negative pressure suction device (10) is communicated with the blood recovery tank (20) and is used for sucking the intracardiac blood into the blood recovery tank (20); the bottom of the blood recovery tank (20) is provided with a blood outlet (23), the blood outlet (23) of the blood recovery tank is communicated with an extracorporeal circulation blood storage tank (40) through a pump pipe (31) of a rolling pump (30), and the rolling pump (30) pumps the blood in the blood recovery tank (20) into the extracorporeal circulation blood storage tank (40).
2. The negative pressure extracorporeal circulation blood suction system according to claim 1, wherein: the blood recovery tank (20) is streamlined in shape, and the bottom of the tank body is in a slender neck shape.
3. The negative pressure extracorporeal circulation blood suction system according to claim 1, wherein: the top of the blood recovery tank is provided with a filter screen (24).
4. The negative pressure extracorporeal circulation blood suction system according to claim 3, wherein: the filter screen (24) is concave in the middle.
5. The negative pressure extracorporeal circulation blood suction system according to claims 1 to 4, characterized in that: still include weighing module (50) and liquid level detection module (60), weighing module (50) are arranged in measuring blood recovery jar (20) blood weight, liquid level detection module (60) are arranged in monitoring blood recovery jar (20) blood liquid level, weighing module (50), liquid level detection module (60) and rolling pump (30) communication connection.
6. The negative pressure extracorporeal circulation blood suction system according to claim 5, wherein: weighing module (50) are including liquid weighing pole (51), liquid weighing pole (51) top is provided with weight chip controller (52), and controller (52) transverse connection has solid fixed ring (53), blood recovery jar (20) are arranged in gu fixed ring (53).
7. The negative pressure extracorporeal circulation blood suction system according to claim 5, wherein: the liquid level detection module (60) is a liquid level monitoring patch sensor and is arranged on the outer side wall of the blood recovery tank.
8. The negative pressure extracorporeal circulation blood suction system according to claim 1, wherein: still include fixing device (70) of internal blood suction tube (1), fixing device (70) include base, montant and can follow the fixed platform of montant aversion from top to bottom, be provided with pipe clamp (71) on the fixed platform, pipe clamp (71) clamp internal blood suction tube (1).
9. The negative-pressure extracorporeal blood suction system according to claim 8, wherein: the pipeline clamp (71) is a reducing pipeline clamp, and an electric telescopic column (72) is arranged in a clamping groove of the pipeline clamp (71).
10. The negative pressure extracorporeal circulation blood suction system according to claim 9, wherein: still include intraductal pressure regulation and control platform (80), be provided with pressure monitoring point (81) on internal blood attracts pipe (1), the intraductal real-time pressure condition of intraductal pressure regulation and control platform (80) monitoring pressure monitoring point (81) department, intraductal pressure regulation and control platform (80) and negative pressure suction device (10) communication connection, the suction dynamics of intraductal pressure regulation and control platform (80) through the pressure condition regulation and control negative pressure suction device (10) of pressure monitoring point (81) department.
CN202210148217.1A 2022-02-17 2022-02-17 Negative pressure type extracorporeal circulation blood suction system Pending CN114470384A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5055198A (en) * 1990-03-07 1991-10-08 Shettigar U Ramakrishna Autologous blood recovery membrane system and method
JP2000000299A (en) * 1998-04-13 2000-01-07 Jms Co Ltd Extracorporeal circulation apparatus having control function
JP2000070361A (en) * 1998-08-31 2000-03-07 S N Seiki:Kk Artificial heart and lung device
US20050256447A1 (en) * 2002-06-14 2005-11-17 Richardson Margaret P Control of liquid flow into or out of a human or animal body
CN101773693A (en) * 2009-12-25 2010-07-14 中国人民解放军第三军医大学第一附属医院 Dual-purpose intelligent pressurizing transfusion apparatus for peacetime and wartime
US20110040229A1 (en) * 2009-08-12 2011-02-17 Hannan Robert L Extracorporeal blood circuit for cardiopulmonary bypass
CN213158283U (en) * 2020-07-17 2021-05-11 刘燕 Closed extracorporeal circulation device for cardiac operation
CN213191566U (en) * 2020-06-24 2021-05-14 德阳市人民医院 Adjustable negative pressure aspirator
WO2021119195A1 (en) * 2019-12-12 2021-06-17 Chawla Lakhmir Singh Extracorporeal blood treatment systems and methods employing batch processing
US20210220537A1 (en) * 2018-11-08 2021-07-22 Nikkiso Company Limited Blood purification apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5055198A (en) * 1990-03-07 1991-10-08 Shettigar U Ramakrishna Autologous blood recovery membrane system and method
JP2000000299A (en) * 1998-04-13 2000-01-07 Jms Co Ltd Extracorporeal circulation apparatus having control function
JP2000070361A (en) * 1998-08-31 2000-03-07 S N Seiki:Kk Artificial heart and lung device
US20050256447A1 (en) * 2002-06-14 2005-11-17 Richardson Margaret P Control of liquid flow into or out of a human or animal body
US20110040229A1 (en) * 2009-08-12 2011-02-17 Hannan Robert L Extracorporeal blood circuit for cardiopulmonary bypass
CN101773693A (en) * 2009-12-25 2010-07-14 中国人民解放军第三军医大学第一附属医院 Dual-purpose intelligent pressurizing transfusion apparatus for peacetime and wartime
US20210220537A1 (en) * 2018-11-08 2021-07-22 Nikkiso Company Limited Blood purification apparatus
WO2021119195A1 (en) * 2019-12-12 2021-06-17 Chawla Lakhmir Singh Extracorporeal blood treatment systems and methods employing batch processing
CN213191566U (en) * 2020-06-24 2021-05-14 德阳市人民医院 Adjustable negative pressure aspirator
CN213158283U (en) * 2020-07-17 2021-05-11 刘燕 Closed extracorporeal circulation device for cardiac operation

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Application publication date: 20220513