CN106581792B - Device for realizing flow balance control by using flow balance type peristaltic pump - Google Patents

Device for realizing flow balance control by using flow balance type peristaltic pump Download PDF

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Publication number
CN106581792B
CN106581792B CN201611191380.7A CN201611191380A CN106581792B CN 106581792 B CN106581792 B CN 106581792B CN 201611191380 A CN201611191380 A CN 201611191380A CN 106581792 B CN106581792 B CN 106581792B
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pump
pipeline
cavity
pipe
base
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CN106581792A (en
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蒋顺忠
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Guangzhou University
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Guangzhou University
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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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/247—Positive displacement blood pumps
    • A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
    • A61M60/268—Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
    • A61M60/279—Peristaltic pumps, e.g. 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
    • A61M1/1601—Control or regulation
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
    • A61M1/1621—Constructional aspects thereof
    • 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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/104—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body
    • A61M60/109—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body incorporated within extracorporeal blood circuits or systems
    • A61M60/113—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body incorporated within extracorporeal blood circuits or systems in other functional devices, e.g. dialysers or heart-lung machines
    • 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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/247—Positive displacement blood pumps
    • A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
    • A61M60/268—Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • 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

Abstract

The invention relates to a flow balance type peristaltic pump for blood purification, which comprises a base, an upper cover, a first pump tube, a second pump tube, a pump head, two balance cavities and a diaphragm, wherein the first pump tube is arranged in the base; the upper cover rotary type of lid on the base is installed on the base, the inside of base is equipped with the pump head groove, the pump head inslot is arranged in along the pump head that longitudinal direction set up, on cover and be equipped with the pump head lid that is used for covering the pump head, first pump line and second pump line are placed in the base along transverse direction, partly pressure-equalizing of first pump line and partly pressure-equalizing of second pump line are on the circumference side of pump head, the both sides of pump head are equipped with the spacing piece that is used for restricting first pump line and second pump line and remove, be equipped with the diaphragm that divide into first cavity and second cavity with balanced cavity in the balanced cavity, first pump line communicates with each other with first cavity, the second pump line communicates with each other with the second cavity, the both sides of two balanced cavity components house pump heads. The balanced peristaltic pump has a flow balancing function and belongs to the technical field of blood purification.

Description

Device for realizing flow balance control by using flow balance type peristaltic pump
Technical Field
The invention relates to the technical field of blood purification, in particular to a flow balance type peristaltic pump for blood purification.
Background
Blood purification techniques include hemodialysis, filtration, adsorption, plasmapheresis, etc., with hemodialysis being the most common. An important task of blood purification is the accurate removal of excess water from the patient, known as ultrafiltration. Technically, the realization of ultrafiltration is completed by controlling the flow of two paths of liquid, and the control of the two paths of flow is realized by two parts, namely a balance system and an ultrafiltration pump structure. The invention patent application No. 200610054252.8 describes a volume balancing and ultrafiltration device for blood purification; the invention patent application No. 201210403479.4 describes a balance pump, the invention patent application No. 201210403480.7 describes a continuous flow balancing device; some of their common features are: 1, the device is arranged in a waterway structure inside a complex hemodialysis device; 2, large and complex mechanical and electrical components are required; 3, only suitable for flowing dialysate but not flowing human blood; 4, the pipeline is not disposable, and needs to be disinfected and cleaned after each use.
The pump body is suitable for flowing human blood, simple in structure and disposable, the most common pump body is a roller type (or roller type) peristaltic pump, almost all blood purification devices are used, but the peristaltic pumps only provide power and cannot realize flow balance, various continuous blood purification devices (CRRT) only use a common peristaltic pump, liquid balance control of the CRRT can be realized only through an electronic scale or a metering bag, and the electronic scale occupies a large space and has strict use requirements.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is as follows: the flow balance type peristaltic pump for purifying blood has a flow balance function and can establish a flow balance system required by ultrafiltration.
A second object of the present invention is to provide a device for flow balance control using a balanced peristaltic pump, which can be used for dialysate flow balance and blood flow balance.
The third purpose of the invention is to provide a device for realizing flow balance control by using a balance type peristaltic pump, which can realize the treatment effect of controlling the total amount of liquid without an electronic scale during the hemodiafiltration treatment.
In order to achieve the purpose, the invention adopts the following technical scheme:
a flow balance type peristaltic pump for blood purification comprises a base, an upper cover, a first pump tube, a second pump tube, a pump head and two balance cavities; the upper cover rotary type of lid on the base is installed on the base, the inside of base is equipped with the pump head groove, the pump head inslot is arranged in along the pump head that transverse direction set up, on cover and be equipped with the pump head lid that is used for covering the pump head, first pump line and second pump line are placed in the base along longitudinal direction, partly pressure-equalizing of first pump line and part of second pump line is on the circumference side of pump head, the both sides of pump head are equipped with the spacing piece that is used for restricting first pump line and second pump line and removes, two balanced cavitys all set up on first pump line and second pump line, be equipped with the diaphragm that divide into first cavity and second cavity with balanced cavity in every balanced cavity, first pump line communicates with each other with first cavity, the second pump line communicates with each other with the second cavity, the both sides of two balanced cavity separated pump heads.
Further, the method comprises the following steps: the pump head is internally provided with 4 rollers which are uniformly arranged along the circumferential direction. When the pump head rotates, the rollers roll the pump tube in sequence to drive the liquid in the pump tube to flow forward, and ensure that at least one roller presses the pump tube at any time to prevent the liquid from flowing back.
Further, the method comprises the following steps: a balance cavity clamping groove is formed in the base, and the balance cavity is arranged in the balance cavity clamping groove. So that the balance cavity is not easy to shake.
Further, the method comprises the following steps: a pipeline clamping groove for placing a first pipeline where the first pump pipe is located and a second pipeline where the second pump pipe is located is formed in the base, one end of the pipeline clamping groove is connected with the pump head groove, and the other end of the pipeline clamping groove is located at the end portion of the base; the upper cover is provided with a gap groove which is matched with the pipeline clamping groove. The notch groove prevents the upper cover from pressing the first pump pipe and the second pump pipe when the upper cover covers the base. The pipeline clamping groove is used for fixing the first pipeline and the second pipeline, so that the first pipeline and the second pipeline are not easy to shake.
Further, the method comprises the following steps: the upper cover is provided with a positioning column, and a positioning hole is arranged at the corresponding position of the base; a position switch is arranged at the positioning hole. The upper cover and the base can be accurately matched, and the base and components in the upper cover can be accurately matched together. When two positioning columns of upper cover are located in two positioning holes of base, can trigger position switch action, then can detect whether the upper cover covers to close well, the pump head forbids work under the situation that does not cover to close well.
Further, the method comprises the following steps: the upper cover is provided with a lock catch column, and the base is provided with a lock catch. When the upper cover is covered on the base, the lock catch is buckled on the lock catch column, so that the upper cover and the base are fastened together.
Further, the method comprises the following steps: the hasp includes the dwang of an organic whole formation and the pole of buckling, and the dwang rotary type ground is installed on the base, is equipped with the breach of detaining on the hasp post on buckling the pole. The lock catch column and the lock catch have simple structures and convenient use.
Further, the method comprises the following steps: the pump head cover is provided with a cover groove, and the cross section of the cover groove is arc-shaped; the axis corresponding to the cover groove and the axis corresponding to the pump head are on the same straight line. When the upper cover is covered on the base, under the combined action of the pump head groove and the cover groove, the pump head can only rotate but cannot displace in the transverse direction, and the driving forces obtained by the liquid in the two pump pipes are equal, so that the first pump pipe and the second pump pipe realize the important condition of flow balance.
A device for realizing flow balance control by utilizing a peristaltic pump comprises a balance type peristaltic pump, a dialyzer, a replacement fluid bag, a first pressure pump, an ultrafiltration pump, a second pressure pump, a first pressure monitor and a second pressure monitor; one end of a first pump pipe of the peristaltic pump is connected with the replacement fluid bag through a pipeline, the other end of the first pump pipe of the peristaltic pump is connected with a dialyzer through a pipeline, one end of a second pump pipe of the peristaltic pump is connected with the dialyzer through a pipeline, and the other end of the second pump pipe of the peristaltic pump discharges waste liquid through a pipeline; the first pressure pump is arranged on a pipeline between the replacement fluid bag and the first pump pipe, the second pressure pump is arranged on a pipeline between the dialyzer and the second pump pipe, the ultrafiltration pump is arranged on a pipeline between the dialyzer and the second pressure pump, the first pressure monitor is arranged on a pipeline between the first pressure pump and the first pump pipe, and the second pressure monitor is arranged on a pipeline between the second pressure pump and the second pump pipe. The device can be used for Hemodialysis (HD), and the balanced peristaltic pump can establish a dialysate or replacement fluid flow balance system required for realizing ultrafiltration.
A device for realizing flow balance control by using a peristaltic pump comprises a balance type peristaltic pump, a hemofilter, a replacement fluid bag, a pre-dilution pressurizing pump, a first pressurizing pump, an ultrafiltration pump, a second pressurizing pump, a first pressure monitor and a second pressure monitor; one end of a first pump pipe of the peristaltic pump introduces blood through a pipeline, the other end of the first pump pipe of the peristaltic pump is connected with a blood filter through a pipeline, one end of a second pump pipe of the peristaltic pump is connected with the blood filter through a pipeline, and the other end of the second pump pipe of the peristaltic pump discharges blood through a pipeline; the first pressure pump is arranged on a pipeline for introducing blood, the second pressure pump is arranged on a pipeline between the hemofilter and the second pump pipe, the first pressure monitor is arranged on the pipeline between the first pressure pump and the first pump pipe, and the second pressure monitor is arranged on the pipeline between the second pressure pump and the second pump pipe; one end of the ultrafiltration pump is connected to a pipeline between the first pressure monitor and the first pressure pump, and the other end of the ultrafiltration pump is connected to a pipeline between the first pump pipe and the blood filter; the replacement fluid bag is connected to a pipeline between the blood filter and the first pump pipe through a replacement fluid pipeline, and the front dilution pressurizing pump is arranged on the replacement fluid pipeline.
In summary, the present invention has the following advantages:
1. the balance type peristaltic pump provided by the invention can be installed on the surface of equipment which is convenient to operate, can be used in a dialysate circuit and a human blood circuit, has a flow balance function, is simple and convenient to use, and can be used for one time without cleaning.
2. The invention has the characteristics that two identical pump pipes are adopted, and the first pump pipe and the second pump pipe are completely identical in size and material; the two paths of liquid are driven by the roller of the same peristaltic pump, the same two pump pipes are adopted, and the material, the inner diameter, the outer diameter and the wall thickness of the pump pipes are the same, so that the flow rates of the two paths of liquid are basically the same.
3. The invention has another special character that the two balancing cavities are connected with two pump pipes, the liquid flow rate depends on the rotation speed of the pump head and has a big relation with the pressure of the left and right sides of the pump pipe, the middle of the balancing cavity is separated by an elastic soft diaphragm, the two sides are symmetrical structures and are respectively connected with one pump pipe, the diaphragm has better elasticity and can move back and forth, the diaphragm is used for keeping the pressure of the two liquid paths to be equal before the liquid enters the peristaltic pump and after the liquid flows out of the peristaltic pump, and the elastic soft diaphragm can move to the low pressure side when the pressure of one side is higher than that of the other side, and finally the pressure of the two sides of the diaphragm is equal; when the pump head rotates, two paths of liquid flow simultaneously.
4. A device for realizing flow balance control by utilizing a peristaltic pump is characterized in that the pressure regulation of a diaphragm in a balance cavity is not infinitely adjustable, and the regulation range of the diaphragm is limited due to the practical size of the diaphragm, so that when a pressure monitor detects that the pressure is too low, a pressurizing pump can properly improve the flow of liquid so as to ensure that the diaphragm in the balance cavity is always positioned close to the middle but not at the limit.
5. The first pipeline and the second pipeline of the invention can be simply installed on the base, the whole peristaltic pump can be installed on the surface of equipment which is convenient to operate, the peristaltic pump can be used in a dialysate circuit and a human blood circuit, and simultaneously has the flow balance function, the peristaltic pump is simple and convenient to use, and the pipelines can be used for one time without cleaning.
Drawings
Fig. 1 is a schematic view of the construction of a peristaltic pump of the present invention.
Fig. 2 is a schematic view of the pump head cover on the pump head.
Fig. 3 is a schematic structural view of the first and second piping.
Fig. 4 is a schematic diagram of the device of the present invention.
Fig. 5 is a schematic diagram of the device for realizing the blood flow balance control of the invention.
Wherein, 1 is a base, 2 is an upper cover, 3 is a pump head, 4 is a pump head cover, 5 is a cover groove, 6 is a roller of the pump head, 7 is a limiting sheet, 8 is an inlet end balance cavity clamping groove, 9 is an outlet end balance cavity clamping groove, 10 is a pipeline clamping groove, 11 is a rotating shaft, 12 is a notch groove, 13 is a locking column, 14 is a lock catch, 15 is a positioning hole, 16 is a positioning column, 17 is a first position switch, 18 is a second position switch, 19 is an inlet end balance cavity, 20 is an outlet end balance cavity, 21 is a diaphragm, 22 is a first cavity of the inlet end balance cavity, 23 is a first cavity of the outlet end balance cavity, 24 is a second cavity of the inlet end balance cavity, 25 is a second cavity of the outlet end balance cavity, 26 is a first pipeline, 27 is a second pipeline, 28 is a first pump pipe, 29 is a second pump pipe, 30 is a pump head groove, 31 is a rotating shaft, 32 is a replacement liquid bag, 33 is a dialyzer, 34 is a first pressure pump, 35 is a second pressure pump, 36 is a first pressure monitor, 37 is a second pressure monitor, 38 is an ultrafiltration pump, 39 is a hemofilter, 40 is a predilution pressure pump, 41 is a substitution fluid line, and 42 is an introduction line.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
For ease of description, the orientations described below are defined as follows: the liquid flowing direction is a longitudinal direction, namely the laying direction of the first pump pipe and the second pump pipe, and the longitudinal direction is a left-right direction; the laying direction of the pump heads is a transverse direction, namely a front-back direction.
A flow balance type peristaltic pump for purifying blood comprises a base, an upper cover, a first pump tube, a second pump tube, a pump head and two balance cavities. The upper cover rotary type of lid on the base is installed on the base, and the upper cover is installed on the base through pivot rotary type, and the mode of opening of upper cover and base is convertible, simple structure, and the mode of opening is convenient. A pump head groove is formed in the base, a pump head arranged along the longitudinal direction is arranged in the pump head groove, an arc-shaped groove (a pump head groove) can be dug in the middle of the inner part of the base, and the size and the shape of the arc-shaped groove are matched with those of the pump head, so that the pump head can rotate in the arc-shaped groove; the roller in the pump head makes circular motion, so that the liquid in the pump pipe is driven to flow; the pump head is provided with 4 rollers, when the pump head rotates, the rollers sequentially roll the pump pipe in sequence to drive the liquid in the pump pipe to flow forwards, and at least one roller is ensured to press the pump pipe at any time to prevent the liquid from flowing back. The pump head belongs to the existing mature technology. The upper cover is provided with a pump head cover for covering the pump head, the pump head cover is provided with a cover groove, the cross section of the cover groove is arc-shaped, and when the upper cover covers the base, under the combined action of the pump head groove and the cover groove, the pump head can only rotate and can not shift in the transverse direction, so that the normal work of the peristaltic pump is ensured, and the pump head cover is an important condition for realizing flow balance of the first pump pipe and the second pump pipe. The first pump pipe and the second pump pipe are placed in the base along the longitudinal direction, the first pump pipe and the second pump pipe are parallel to each other, one part of the first pump pipe and one part of the second pump pipe are pressure-equalized on the circumferential side face of the pump head, namely, the pump head is placed in the pump head groove, then the first pump pipe and the second pump pipe are laid, and the pump head is required to have enough length to ensure that one part of the first pump pipe and one part of the second pump pipe are attached to the circumferential side face of the pump head. The two sides (two sides in the transverse direction) of the pump head are provided with two limiting pieces for limiting the first pump pipe and the second pump pipe to move, namely, one limiting piece is positioned behind the pump head, the other limiting piece is positioned in front of the pump head, and the limiting pieces can ensure that the first pump pipe and the second pump pipe cannot slide out of the pump head, so that the important condition that the pump head can drive liquid to flow all the time is ensured. Two balanced cavitys all set up on first pump line and second pump line, are equipped with the diaphragm that divide into first cavity and second cavity with balanced cavity in the balanced cavity, and first pump line communicates with each other with first cavity, and the second pump line communicates with each other with the second cavity, and two balanced cavitys are separated on the both sides of pump head, and a balanced cavity is located the left side of pump head promptly, and another balanced cavity is located the right side of pump head. The two balance cavities are respectively an inlet balance cavity and an outlet balance cavity, the inlet balance cavity is internally divided into a first cavity and a second cavity, and the outlet balance cavity is internally divided into the first cavity and the second cavity. The first cavity of the inlet end balance cavity, the first pump pipe, the first cavity of the outlet end balance cavity and corresponding pipelines form a first pipeline; the second cavity of the inlet end balance cavity, the second pump pipe, the second cavity of the outlet end balance cavity and corresponding pipelines form a second pipeline.
A balance cavity clamping groove is formed in the base, and the balance cavity is arranged in the balance cavity clamping groove. The balance cavity clamping groove is provided with an inlet end balance cavity clamping groove and an outlet end balance cavity clamping groove, and the inlet end balance cavity and the outlet end balance cavity are placed in the corresponding balance cavity clamping grooves. So that the balance cavity is not easy to shake.
A pipeline clamping groove for placing a first pipeline and a second pipeline is arranged in the base, one end of the pipeline clamping groove is connected with the pump head groove, and the other end of the pipeline clamping groove is positioned at the end part of the base; the pipeline clamping groove is provided with two sections, one section of pipeline clamping groove is positioned on the left side of the pump head, and the other section of pipeline clamping groove is positioned on the right side of the pump head; the inlet end balance cavity clamping groove is positioned on the left pipeline clamping groove, and the outlet end balance cavity clamping groove is positioned on the right pipeline clamping groove. So that the first pump pipe and the second pump pipe cannot shake, and smooth circulation of liquid is ensured. The upper cover is provided with a notch groove matched with the pipeline clamping groove, so that the upper cover can press the first pipeline and the second pipeline when the upper cover covers the base.
The upper cover is provided with a positioning column, and a positioning hole is arranged at the corresponding position of the base. The two positioning columns and the two positioning holes are arranged on the left side and the right side of the front end of the base, and position switches are arranged at the positioning holes. The position switch at the left positioning hole is a first position switch, and the position switch at the right positioning hole is a second position switch. When the two positioning columns of the upper cover are positioned in the two positioning holes of the base, the position switch can be triggered to act, whether the upper cover is completely covered or not can be detected, and the pump head is forbidden to work under the condition that the upper cover is not completely covered; the upper cover is not intact, and the pump head is controlled to be prohibited from working when the position switch is triggered.
The upper cover is provided with a lock catch column, and the base is provided with a lock catch. When the upper cover is covered on the base, the lock catch is buckled on the lock catch column, so that the upper cover and the base are fastened together. The hasp includes the dwang of an organic whole formation and the pole of buckling, and the dwang rotary type ground is installed on the base, is equipped with the breach of detaining on the hasp post on buckling the pole. The lock catch column and the lock catch have simple structures and convenient use.
The principle of the invention for realizing flow balance mainly comprises the following steps: two blood liquid flows into first pump line and second pump line respectively, because two liquid all pass through the same structure for two blood realize the balance at the flow in first pump line and second pump line.
The invention has the following advantages: 1, can be installed on the surface of the blood purification equipment to facilitate the operation (the traditional balancing technology is installed inside the equipment and fixed structure). 2, the structure is simple (the traditional balance cavity needs two containers, two diaphragms, four cavities and 8 electromagnetic valves), the use is convenient (the structure and the space between the roller and the shell of the common peristaltic pump are fixed, the pump pipe needs to be plugged in and the pump head is rotated by hands to easily clamp the hand, and the invention adopts flip cover installation and rotation and cover closing lock catches). 3, can be used in a dialysate circuit and a human blood circuit (the traditional balance technology can not be used for the balance of flowing blood due to repeated use and cross infection caused by different patients). And 4, the flow balancing function is triple (one is that two pipes are the same pump, two ways are the same pressure, and the third is that the first pressure pump and the second pressure pump are linked). 5, the pump tube can be used once, and does not need to be disinfected and cleaned after each use (the traditional balancing technology is a fixed internal pipeline system and is repeatedly used, and different patients can generate cross infection due to the need of cleaning and sterilizing each time).
An example of an application of the peristaltic pump of the present invention is described below:
a device for realizing flow balance control by utilizing a peristaltic pump comprises a dialyzer, a replacement fluid bag, a first pressure pump, an ultrafiltration pump and a second pressure pump; the one end of the first pump line of peristaltic pump passes through the pipeline and meets with the replacement fluid bag, the other end of the first pump line of peristaltic pump passes through the pipeline and meets with the cerini dialyser cerini, the one end of the second pump line of peristaltic pump passes through the pipeline and meets with the cerini dialyser cerini, the other end of the second pump line of peristaltic pump passes through the pipe discharge waste liquid, first force (forcing) pump sets up on the pipeline between replacement fluid bag and first pump line, the second force (forcing) pump sets up on the pipeline between cerini dialyser cerini and second force (forcing) pump, the ultrafiltration pump sets up on the pipeline between cerini dialyser cerini and second force (forcing) pump. The device further comprises a first pressure monitor disposed on the pipeline between the first booster pump and the first pump pipe, and a second pressure monitor disposed on the pipeline between the second booster pump and the second pump pipe. The device can be used for realizing the flow balance control of the dialyzate or the replacement fluid.
Fresh dialysate flows from the replacement fluid bag, then flow to first pump line (dialysate is in proper order through the first cavity that advances the balanced cavity of end, first pump line, the first cavity of the balanced cavity of play end), dialysate flows out from first pump line after, then flow to the cerini dialyser cerini, flow out from the other end of cerini dialyser cerini again (the dialysate that flows this moment has become the waste liquid), the waste liquid flows to the second pump line again (the waste liquid is in proper order through the second cavity that advances the balanced cavity of end, the second pump line, the second cavity of the balanced cavity of play end), behind the waste liquid outflow second pump line, through the pipe discharge waste liquid.
The first pressure monitor can monitor the pressure of the liquid in the first cavity of the inlet balance cavity, and the second pressure monitor can monitor the pressure of the liquid in the second cavity of the inlet balance cavity; the first pressure pump can adjust the flow in the first pipeline to realize speed regulation pressurization, and similarly, the second pressure pump can adjust the flow in the second pipeline to realize speed regulation pressurization. When the pressure difference between the first cavity of the inlet end balance cavity and the second cavity of the inlet end balance cavity is too large and exceeds the pressure adjusting capacity of the balance cavity diaphragm, the first pressure pump and the second pressure pump can respectively adjust the flow in the first pump pipe and the second pump pipe according to the conditions, so that the pressure balance between the first cavity of the inlet end balance cavity and the second cavity is ensured, and the flow balance between the first pump pipe and the second pump pipe is further realized. The balance type peristaltic pump can realize the balance of the flow in the first pump tube and the second pump tube, so that the flow of dialysate entering the peristaltic pump is consistent with the flow of waste liquid discharged from the peristaltic pump. When the patient has excessive moisture, the excessive moisture can only be discharged from the ultrafiltration pump, so that the volume of the liquid pumped by the ultrafiltration pump is exactly equal to the total amount of the ultrafiltration required by the patient on the basis of the balance type peristaltic pump establishing the balance system.
The dialyzer introduces the blood and the dialysate of a patient into the dialyzer at the same time by mainly utilizing the principle of a semipermeable membrane, the blood and the dialysate flow in opposite directions on two sides of the dialysis membrane, and the toxin is removed and excessive water is retained in the body by virtue of solute gradient, osmotic gradient and water pressure gradient on the two sides of the membrane, and substances required in the body are supplemented at the same time.
The following describes an example of the application of the balanced peristaltic pump of the present invention to blood flow balancing:
some of these tubes are named for ease of introduction, and in this example of application there is a tube for introducing blood, called the introduction tube; there is a line for introducing a replacement fluid, called a replacement fluid line. A device for realizing flow balance control by using a peristaltic pump comprises a balance type peristaltic pump, a hemofilter, a replacement fluid bag, a pre-dilution pressurizing pump, a first pressurizing pump, an ultrafiltration pump, a second pressurizing pump, a first pressure monitor and a second pressure monitor. One end of a first pump pipe of the peristaltic pump introduces blood through a pipeline, the other end of the first pump pipe of the peristaltic pump is connected with a blood filter through a pipeline, one end of a second pump pipe of the peristaltic pump is connected with the blood filter through a pipeline, and the other end of the second pump pipe of the peristaltic pump discharges blood through a pipeline. The first pressure pump is provided on a tube for introducing blood (i.e., an introduction tube), and the second pressure pump is provided on a tube between the hemofilter and the second pump tube. The first pressure monitor is arranged on the pipeline between the first pressure pump and the first pump pipe, namely the first pressure monitor is arranged on the introducing pipeline, and the first pressure monitor is close to the first cavity of the inlet end balancing cavity. The second pressure monitor is arranged on a pipeline between the second booster pump and the second pump pipe, and the second pressure monitor is close to the second cavity of the inlet end balance cavity. One end of the ultrafiltration pump is connected to a pipeline (an introduction pipeline) between the first pressure monitor and the first pressure pump, and the other end of the ultrafiltration pump is connected to a pipeline between the first pump pipe and the blood filter; the replacement fluid bag is connected to a pipeline between the blood filter and the first pump pipe through a replacement fluid pipeline, and the front dilution pressurizing pump is arranged on the replacement fluid pipeline.
The device can realize the control of blood flow balance, can be used for hemodialysis filtration (HDF), and the balanced peristaltic pump can establish a blood balance system, realizes the balance of replacement fluid and the required ultrafiltration control, and does not need an electronic scale.
The blood at the arterial end of a patient is connected to a first pump tube of a peristaltic pump through an introduction tube, the first pressure pump sucks the blood to enable the blood to reach a first cavity of an inlet end balance cavity, then the blood flows through the first pump tube and the first cavity of an outlet end balance cavity, and then the blood is converged with a replacement fluid flowing out of a replacement fluid bag (the replacement fluid is converged through a replacement fluid tube) and enters a hemofilter together; the blood filtered by the hemofilter is pumped into the second cavity of the inlet balance cavity by the second pressure pump, then flows through the second pump tube and the second cavity of the outlet balance cavity, and returns to the venous end of the patient. The balance function of the balance type peristaltic pump ensures that the total amount of the blood flowing out and in of the patient is balanced, and the total amount of the replacement fluid which flows into the pipeline from the replacement fluid bag is equal to the total amount of the filtered fluid of the hemofilter; on the basis of establishing the balance system, if the patient needs proper ultrafiltration, certain blood is pumped by the ultrafiltration pump after the first pressurizing pump, and the blood pumped by the ultrafiltration pump bypasses the balance type peristaltic pump without passing through the peristaltic pump, namely bypasses the first pipeline and directly reaches a pipeline between the first cavity of the outlet balance cavity and the hemofilter, so that the volume of the blood flowing through the ultrafiltration pump is exactly equal to the total volume of the patient needing ultrafiltration.
The first pressure monitor can monitor the pressure of the liquid in the first cavity of the inlet balance cavity, and the second pressure monitor can monitor the pressure of the liquid in the second cavity of the inlet balance cavity; the first pressure pump can adjust the flow in the first pipeline to realize speed regulation pressurization, and similarly, the second pressure pump can adjust the flow in the second pipeline to realize speed regulation pressurization. When the pressure difference between the first cavity and the second cavity of the inlet end balance cavity is too large and exceeds the pressure adjusting capacity of the balance cavity diaphragm, the first pressure pump and the second pressure pump can respectively adjust the flow in the first pump pipe and the second pump pipe according to the conditions, so that the pressure balance between the first cavity and the second cavity of the inlet end balance cavity is ensured, and the flow balance between the first pump pipe and the second pump pipe is further realized. The peristaltic pump can realize the balance of the flow in the first pump tube and the second pump tube, so that the total amount of the blood of the patient flowing out of the body and entering the peristaltic pump is consistent with the total amount of the blood which is filtered by the hemofilter and then discharged out of the peristaltic pump and returned to the body. When there is excess water in the patient, ultrafiltration can be achieved by the ultrafiltration pump, since a certain amount of blood is pumped in from the first pressurizing pump via the ultrafiltration pump, the total amount of blood flowing out of the patient will be greater than the total amount flowing in, and the volume of blood flowing through the ultrafiltration pump will exactly equal the total amount of ultrafiltration required by the patient.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (8)

1. The utility model provides an utilize flow balance formula peristaltic pump to realize flow balance control's device, the peristaltic pump is used for blood to purify, its characterized in that: the peristaltic pump comprises a base, an upper cover, a first pump pipe, a second pump pipe, a pump head and two balance cavities; the upper cover covered on the base is rotatably arranged on the base, a pump head groove is formed in the base, a pump head arranged along the transverse direction is arranged in the pump head groove, a pump head cover used for covering the pump head is arranged on the upper cover, a first pump pipe and a second pump pipe are arranged in the base along the longitudinal direction, one part of the first pump pipe and one part of the second pump pipe are pressure-equalized on the circumferential side surface of the pump head, limiting pieces used for limiting the first pump pipe and the second pump pipe to move are arranged on two sides of the pump head, two balance cavities are arranged on the first pump pipe and the second pump pipe, a diaphragm used for dividing the balance cavity into a first cavity and a second cavity is arranged in each balance cavity, the first pump pipe is communicated with the first cavity, the second pump pipe is communicated with the second cavity, and the two balance cavities are arranged on two sides of the pump head;
the device comprises a balanced peristaltic pump, a hemofilter, a replacement fluid bag, a pre-dilution pressure pump, a first pressure pump, an ultrafiltration pump, a second pressure pump, a first pressure monitor and a second pressure monitor; one end of a first pump pipe of the peristaltic pump introduces blood through a pipeline, the other end of the first pump pipe of the peristaltic pump is connected with a blood filter through a pipeline, one end of a second pump pipe of the peristaltic pump is connected with the blood filter through a pipeline, and the other end of the second pump pipe of the peristaltic pump discharges blood through a pipeline; the first pressure pump is arranged on a pipeline for introducing blood, the second pressure pump is arranged on a pipeline between the hemofilter and the second pump pipe, the first pressure monitor is arranged on the pipeline between the first pressure pump and the first pump pipe, and the second pressure monitor is arranged on the pipeline between the second pressure pump and the second pump pipe; one end of the ultrafiltration pump is connected to a pipeline between the first pressure monitor and the first pressure pump, and the other end of the ultrafiltration pump is connected to a pipeline between the first pump pipe and the blood filter; the replacement fluid bag is connected to a pipeline between the blood filter and the first pump pipe through a replacement fluid pipeline, and the front dilution pressurizing pump is arranged on the replacement fluid pipeline.
2. The apparatus of claim 1 for achieving flow balance control using a flow balanced peristaltic pump, wherein: the pump head is internally provided with 4 rollers which are uniformly arranged along the circumferential direction.
3. The apparatus of claim 1 for achieving flow balance control using a flow balanced peristaltic pump, wherein: a balance cavity clamping groove is formed in the base, and the balance cavity is arranged in the balance cavity clamping groove.
4. The apparatus of claim 2 for achieving flow balance control using a flow balanced peristaltic pump, wherein: a pipeline clamping groove for placing a first pipeline where the first pump pipe is located and a second pipeline where the second pump pipe is located is formed in the base, one end of the pipeline clamping groove is connected with the pump head groove, and the other end of the pipeline clamping groove is located at the end portion of the base; the upper cover is provided with a gap groove which is matched with the pipeline clamping groove.
5. The apparatus of claim 1 for achieving flow balance control using a flow balanced peristaltic pump, wherein: the upper cover is provided with a positioning column, and a positioning hole is arranged at the corresponding position of the base; a position switch is arranged at the positioning hole.
6. The apparatus of claim 1 for achieving flow balance control using a flow balanced peristaltic pump, wherein: the upper cover is provided with a lock catch column, and the base is provided with a lock catch.
7. The apparatus for achieving flow balance control using a flow balanced peristaltic pump as defined in claim 6, wherein: the hasp includes the dwang of an organic whole formation and the pole of buckling, and the dwang rotary type ground is installed on the base, is equipped with the breach of detaining on the hasp post on buckling the pole.
8. The apparatus of claim 1 for achieving flow balance control using a flow balanced peristaltic pump, wherein: the pump head cover is provided with a cover groove, and the cross section of the cover groove is arc-shaped; the axis corresponding to the cover groove and the axis corresponding to the pump head are on the same straight line.
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