CN116999041B - Contactless back pressure monitoring system and monitoring method - Google Patents
Contactless back pressure monitoring system and monitoring method Download PDFInfo
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- CN116999041B CN116999041B CN202311152067.2A CN202311152067A CN116999041B CN 116999041 B CN116999041 B CN 116999041B CN 202311152067 A CN202311152067 A CN 202311152067A CN 116999041 B CN116999041 B CN 116999041B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title abstract description 9
- 239000008280 blood Substances 0.000 claims abstract description 45
- 210000004369 blood Anatomy 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 27
- 238000012806 monitoring device Methods 0.000 claims abstract description 14
- 210000003462 vein Anatomy 0.000 claims abstract description 10
- 230000036772 blood pressure Effects 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 84
- 238000001514 detection method Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 206010011409 Cross infection Diseases 0.000 abstract description 4
- 206010029803 Nosocomial infection Diseases 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 230000005389 magnetism Effects 0.000 description 7
- 239000012528 membrane Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001631 haemodialysis Methods 0.000 description 2
- 230000000322 hemodialysis Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
-
- 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
-
- 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
- A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
- A61M5/16854—Monitoring, detecting, signalling or eliminating infusion flow anomalies by monitoring line pressure
-
- 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
- A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
- A61M2005/1657—Filter with membrane, e.g. membrane, flat sheet type infusion filter
-
- 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
- A61M2205/3327—Measuring
-
- 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
- A61M2205/3331—Pressure; Flow
-
- 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
- A61M2205/75—General characteristics of the apparatus with filters
- A61M2205/7536—General characteristics of the apparatus with filters allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Vascular Medicine (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
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- Surgery (AREA)
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Abstract
The invention discloses a non-contact back transfusion pressure monitoring system and a monitoring method, wherein the non-contact back transfusion pressure monitoring system comprises a venous kettle, a magnetic suction type pressure monitoring device, a pump pipe and a peristaltic pump, wherein the venous kettle is arranged on a venous side blood loop and is communicated with the venous side blood loop, the magnetic suction type pressure monitoring device is positioned on the venous side blood loop between the venous kettle and a human vein and is used for monitoring the blood pressure back to the human vein, one end of the pump pipe is communicated with the upper end of the venous kettle, the other end of the pump pipe is communicated with the atmosphere, the peristaltic pump is arranged at the outer side of a host machine and is used for extruding and air intake or air exhaust of the pump pipe, the peristaltic pump is moved to the outside of the machine, the pump pipe extending out of the venous kettle is clamped by the peristaltic pump, and the pump pipe is directly extruded and air intake or air exhaust when the liquid level in the venous kettle needs to be regulated, so that the situation that the interface and the inside of the host machine are polluted by blood when the liquid level of blood in the kettle cavity is too high is avoided, and cross infection of patients is caused.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a non-contact back transfusion pressure monitoring system and a monitoring method.
Background
At present, the monitoring of the back transfusion pressure for the hemodialysis treatment equipment is generally that an air pressure sensor is arranged in a machine, the pressure in a pipe cavity is transmitted to a host computer in real time by the compression of the liquid capacity in a venous kettle cavity to the air in the kettle, and the blood pressure is detected by detecting the air in the venous kettle.
In addition, in the existing design, in order to avoid the contact of blood and luer connector gas circuit, a membrane is added between the disposable pipeline and luer connector, the membrane allows gas to pass through but does not allow liquid to pass through, and although the design can reduce the condition of blood cross contamination, after the membrane contacts the blood, the membrane is immediately invalid and cannot pass through the gas, and the consumable of the whole set of pipeline faces replacement, so that the great waste of the consumable is caused.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a non-contact back transfusion pressure monitoring system and a non-contact back transfusion pressure monitoring method, so as to solve the problem that when the liquid level of blood in a kettle cavity is too high, the blood pollutes an interface on a host machine, thereby causing cross infection of patients.
In order to solve the technical problems, the invention adopts the following technical scheme: a contactless back pressure monitoring system, comprising:
A venous pot disposed on the venous side blood circuit;
The magnetic pressure monitoring device is positioned on a venous side blood circuit between the venous kettle and the human vein and is used for monitoring the blood pressure returned to the human vein;
One end of the pump pipe is communicated with the upper end of the venous kettle, and the other end of the pump pipe is communicated with the atmosphere;
the peristaltic air pump is arranged on the outer side of the host machine and used for extruding and air intake or exhaust of the pump pipe.
As a further improvement of the invention, a gas filter is arranged at one end of the pump tube away from the venous pot.
As a further improvement of the invention, a filter screen is arranged inside the venous kettle and below the venous kettle.
As a further improvement of the invention, the longitudinal section of the filter screen is in a truncated cone shape.
As a further improvement of the present invention, the magnetic pressure monitoring device includes:
The first magnetic component is used for detecting pressure of fluid circulation and comprises a flow pipe and a first installation shell, two ends of the flow pipe are respectively communicated with a venous blood circuit, and a pressure sensor with a detection end positioned in the flow pipe and a first magnetic connector electrically connected with the pressure sensor are arranged in the first installation shell;
The second magnetism is inhaled the subassembly, the subassembly is inhaled with first magnetism and is inhaled the subassembly cooperation and detect signal transmission, the second magnetism is inhaled the subassembly and is equipped with and inhale connector matched with second magnetism with first magnetism and inhale the connector, inhale the connector and inhale the connector through first magnetism and second magnetism and carry out the transmission that pressure sensor detected the signal of telecommunication.
As a further improvement of the invention, the second magnetic component is provided with a second installation shell for installing the second magnetic connector, the lower part of the second installation shell is sleeved on the outer side of the first installation shell, and the inner side of the lower part of the second installation shell is provided with a limiting step matched with the end face of the first installation shell.
As a further improvement of the invention, the outer wall of the first installation shell and the assembly surface of the second installation shell are provided with convex ribs, and the inner wall of the second installation shell and the assembly surface of the first installation shell are provided with grooves which are matched with each other.
As a further improvement of the invention, an electromagnet and an iron block are arranged between the matching surfaces of the first installation shell and the second installation shell, the iron block is embedded on the first installation shell, the electromagnet is arranged on the second installation shell, and the connection and disconnection between the first installation shell and the second installation shell are realized by controlling the on-off of a circuit in the electromagnet.
As a further improvement of the invention, the first installation shell and the second installation shell are respectively provided with an installation cavity for installing the corresponding magnetic connector, the installation cavities are matched with the magnetic connector in shape, the installation cavities are respectively provided with an annular stop block for limiting the magnetic connector on one side, which is close to each other, of each installation cavity, and the magnetic connector is installed from one side, which is away from the annular stop block, of the installation cavity.
As a further improvement of the invention, the flow pipe is provided with an installation seat matched with the first installation shell, an installation groove matched with the pressure sensor is arranged in the installation seat, a through hole communicated with the flow pipe is arranged at the bottom of the installation groove, the detection end of the pressure sensor stretches into the through hole and is flush with the inner wall of the flow pipe, the fluid pressure in the flow pipe is monitored, and a fixed seat for integrally fixing the monitoring device is arranged on one side of the second installation shell, which is away from the first installation shell.
The invention also discloses a non-contact back transfusion pressure monitoring method, which comprises the following steps:
S1, a pipeline is powered on, a magnetic pressure monitoring assembly is connected with a host, and a pump pipe at the upper end of a venous kettle is clamped into a peristaltic air pump;
s2, the magnetic pressure monitoring component is communicated with the atmosphere through a pump pipe and is zeroed with the atmospheric pressure;
s3, when the host machine runs, the liquid level in the venous kettle is at a normal level, the pump pipe is compressed by the peristaltic air pump and is not communicated with the atmosphere, and the magnetic pressure monitoring assembly can normally measure pressure;
s4, when the liquid level in the venous kettle is higher than the normal level, the peristaltic air pump rotates, air is pumped into the venous kettle, the liquid level of the venous kettle is reduced, and the venous return pressure is increased;
S5, when the liquid level is lower than the normal level, the peristaltic air pump rotates in the opposite direction, the air in the venous pot is pumped out, the liquid level of the venous pot is increased, and the venous return pressure is reduced.
Compared with the prior art, the invention has the following beneficial effects:
1. According to the non-contact feedback pressure monitoring system, the peristaltic air pump is moved to the outside of the machine, the pump pipe extending out of the venous kettle is clamped by the peristaltic air pump, and the pump pipe is directly extruded to enter air or exhaust air when the liquid level in the venous kettle needs to be regulated, so that the condition that the blood pollutes an interface on a host machine and the inside of the machine when the liquid level of the blood in the kettle cavity is too high, and cross infection of a patient is caused is avoided.
2. The non-contact back-transfusion pressure monitoring system reduces the complex structures of internal pipelines such as luer connectors, electromagnetic valves and the like, and can be directly applied to a peristaltic air pump outside a machine.
3. The non-contact back transfusion pressure monitoring system provided by the invention has the advantages that the back transfusion pressure is measured by the magnetic attraction type pressure monitoring component and blood in a direct contact mode, and the back transfusion pressure is more accurate than the mode of measuring the air pressure in a venous kettle.
Drawings
FIG. 1 is a schematic diagram of a prior art feedback pressure monitoring system;
FIG. 2 is a schematic diagram of a contactless back pressure monitoring system according to the present invention;
FIG. 3 is a schematic diagram of a contactless back pressure monitoring system according to the present invention;
FIG. 4 is a schematic view of a first magnetic assembly according to the present invention;
FIG. 5 is a schematic diagram of a second magnetic assembly according to the present invention;
In the accompanying drawings: 100. a venous kettle;
200. Suction pressure monitoring device; 210. a flow pipe; 211. a first mounting housing; 212. a pressure sensor; 213. a first magnetic connector; 214. convex ribs; 215. iron blocks; 216. a mounting base; 217. a mounting groove; 218. a through hole;
220. A second magnetic connector; 221. a second mounting housing; 222. a limit step; 223. a groove; 224. an electromagnet; 225. a mounting cavity; 226. an annular stop; 227. a fixing seat;
300. A pump tube;
400. peristaltic air pump;
500. A gas filter;
600. Venous side blood circuit.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 2 to 5 are schematic structural views showing an embodiment of a non-contact back infusion pressure monitoring system according to the present invention, and a main body portion thereof includes a venous kettle 100, a magnetic suction type pressure monitoring assembly 200, a pump tube 300 and a peristaltic air pump 400.
The venous pot 100 is used for collecting and separating air in a hemodialysis process and storing blood conveyed by the venous side blood circuit 600, the venous pot 100 is arranged on the venous side blood circuit 600, a gas-blood contact surface is arranged above the venous pot 100, a liquid inlet, a liquid outlet and an exhaust hole are formed in the venous pot 100, the liquid inlet and the exhaust hole are formed in the top of the venous pot, the liquid inlet is communicated with the blood inlet of the venous side blood circuit 600, the liquid outlet is communicated with the blood outlet of the venous side blood circuit 600, after the blood containing gas enters the venous pot 100, the blood can be temporarily stored in the venous pot 100, bubbles can float upwards in the process, then the blood is discharged from the bottom of the venous pot 100, and therefore the effect of removing the bubbles is achieved. The front end surface of the venous pot 100 is provided with liquid level scale marks which are vertically distributed, so that the capacity of liquid in the venous pot 100 can be further conveniently observed.
The magnetic pressure monitoring device 200 is located on a venous side blood circuit between the venous pot 100 and a vein of a human body, and is used for monitoring blood pressure returned to the vein of the human body. Specifically, the magnetic pressure monitoring device 200 includes a first magnetic component and a second magnetic component, where the first magnetic component is used for pressure detection in fluid circulation, the first magnetic component includes a flow tube 210 and a first installation housing 211, two ends of the flow tube 210 are respectively communicated with the venous blood circuit 600, and a pressure sensor 212 with a detection end located in the flow tube 210 and a first magnetic connector 213 electrically connected with the pressure sensor 212 are disposed in the first installation housing 211. The second magnetic component is matched with the first magnetic component to transmit detection signals, the second magnetic component is provided with a second magnetic connector 220 matched with the first magnetic connector 213, and the first magnetic connector 213 and the second magnetic connector 220 are used for transmitting detection signals of the pressure sensor 212. The second magnetic component is provided with a second installation shell 221 for installing the second magnetic connector 220, the lower part of the second installation shell 221 is sleeved on the outer side of the first installation shell 211, and the inner side of the lower part of the second installation shell 221 is provided with a limit step 222 matched with the end face of the first installation shell 211. The outer wall of the first installation shell 211 and the assembly surface of the second installation shell 221 are provided with convex ribs 214, and the inner wall of the second installation shell 221 and the assembly surface of the first installation shell 211 are provided with a matched groove 223, so that the reliability of structural fit is further improved, and the stability during pressure measurement is ensured. The electromagnet 224 and the iron block 215 are arranged between the matching surfaces of the first installation shell 211 and the second installation shell 221, the iron block 215 is embedded on the first installation shell 211, the electromagnet 224 is arranged on the second installation shell 221, and connection and disconnection between the first installation shell 211 and the second installation shell 221 are realized by controlling on-off of a circuit in the electromagnet 224, so that acting force between the magnetic components is increased when the magnetic device is used, and the magnetic device can be quickly separated after work is completed. The first installation housing 211 and the second installation housing 221 are respectively provided with an installation cavity 225 for installing a corresponding magnetic connector, the shape of the installation cavity 225 is matched with that of the magnetic connector, the installation cavities 225 are respectively provided with an annular stop block 226 for limiting the magnetic connector on one side close to each other, and the magnetic connector is installed on one side, deviating from the annular stop block 226, of the installation cavity 225, so that the assembly of the detection device can be rapidly carried out. During assembly, the first magnetic connector 213 and the second magnetic connector 220 can be respectively stuck in the mounting cavity 225 by using glue, so that the first magnetic connector 213 and the second magnetic connector 220 are prevented from falling off due to loose adhesion during magnetic attraction.
Preferably, in this embodiment, the flow tube 210 is provided with a mounting seat 216 for matching with the first mounting housing 211, a mounting groove 217 adapted to the pressure sensor 212 is provided in the mounting seat 216, a through hole 218 communicating with the flow tube 210 is provided at the bottom of the mounting groove 217, the detection end of the pressure sensor 212 extends into the through hole 218 and is flush with the inner wall of the flow tube 210, the blood pressure in the flow tube 210 directly acts on the membrane of the pressure sensor 212, so as to realize the detection of the blood pressure in the flow tube, and meanwhile, in order to reduce the backflow of the liquid in the flow tube 210, further improve the flowing state of the liquid, avoid the aggregation of the blood at the place, form a dead zone, and make the detection end of the pressure sensor 212 extend out of the through hole 218 and be flush with the inner wall of the flow tube 210. During assembly, the outer peripheral wall of the detection port of the pressure sensor 212 is adhered to the inner wall of the through hole 218 by coating gel on the inner wall of the through hole 218, so that the detection port of the pressure sensor 212 plugs the through hole 218, blood is sealed, and the blood is prevented from flowing out of a gap between the detection port of the pressure sensor 212 and the through hole 2185, so that the pressure of the blood in the flow tube 1 cannot be accurately monitored. The second installation casing 221 is equipped with the fixing base 227 that is used for carrying out monitoring devices overall fixation in one side that deviates from first installation casing 211, has seted up the mounting hole on the fixing base 227, is connected with the outer wall of system host computer through the mounting hole.
One end of the pump tube 300 communicates with the upper end of the venous pot 100, and the other end of the pump tube 300 communicates with the atmosphere, and preferably, in the present embodiment, the air is filtered before the external air enters the venous pot 100, and a gas filter 500 is provided at an end of the pump tube 300 remote from the venous pot 100. The inside of the venous kettle 100 and the lower part of the venous kettle 100 are provided with a filter screen, the filter screen in the venous kettle 100 can filter blood, the filtered blood is infused back into the body of a patient, and the longitudinal section of the filter screen is in a truncated cone shape.
The peristaltic air pump 400 is disposed at the outside of the main body for compressing air intake or exhaust of the pump tube 300. When the peristaltic pump 400 is not rotated, the pump head can completely press the pump tube 300, the gas compression space inside the pump tube 300 is small, and the blood cannot possibly break through the compression of the pump tube 300 and be sprayed to the outside of the pipeline.
As shown in fig. 1, the peristaltic air pump, the electromagnetic valve, the air pressure sensor and other structures are arranged in the CRRT in the prior art, the peristaltic air pump, the electromagnetic valve and the air pressure sensor are connected in series through the pipelines, and finally the peristaltic air pump, the electromagnetic valve and the air pressure sensor are connected with the venous kettle of the disposable consumable pipeline through the luer connector, so that the blood pressure is detected through detecting the air in the venous kettle, but the detection of the back transfusion pressure can lead the blood to reach the joint connected with the host through the kettle cavity when the liquid level of the blood in the kettle cavity is too high, the blood in the venous kettle possibly rushes into the machine when the pipeline pressure is too high, the luer connector and the pipeline in the machine are polluted, and the blood of a previous patient can cause cross infection when the treatment is performed next time, so that the service life of the machine is also influenced. According to the peristaltic pump 400, the peristaltic pump 400 is moved to the outside of the machine, the pipeline (the pump pipe 300) extending out of the venous bottle 100 is clamped by the peristaltic pump 400, and the pipeline (the pump pipe 300) extending out of the venous bottle 100 is directly extruded to be fed or discharged when the liquid level needs to be regulated.
The invention also provides a non-contact back transfusion pressure monitoring method, which comprises the following specific implementation steps:
S1, a pipeline is powered on, the magnetic pressure monitoring assembly 200 is connected with a host, and a pump pipe 300 at the upper end of the venous bottle 100 is clamped into a peristaltic air pump 400;
S2, the magnetic pressure monitoring assembly 200 is communicated with the atmosphere through a pump pipe 300 and is zeroed with the atmosphere;
S3, when the host machine runs, the liquid level in the venous kettle 100 is at a normal level, the pump pipe 300 is compressed by the peristaltic air pump 400 and is not communicated with the atmosphere, and the magnetic pressure monitoring assembly 200 can normally measure pressure;
S4, when the liquid level in the venous pot 100 is higher than the normal level, the peristaltic air pump 400 rotates, air is pumped into the venous pot 100 through the air filter 500, the liquid level of the venous pot 100 is reduced, and the venous return pressure is increased;
s5, when the liquid level is lower than the normal level, the peristaltic air pump 400 rotates in the opposite direction, the air in the venous pot 100 is pumped out, the liquid level of the venous pot 100 is increased, and the venous return pressure is reduced.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A contactless back pressure monitoring system, comprising:
a venous pot (100), the venous pot (100) being disposed on a venous-side blood circuit (600);
The magnetic pressure monitoring device (200), the magnetic pressure monitoring device (200) is located on a venous side blood loop (600) between a venous kettle (100) and a human vein and is used for monitoring blood pressure returned to the human vein, the magnetic pressure monitoring device (200) comprises a first magnetic component used for detecting pressure through fluid circulation and a second magnetic component matched with the first magnetic component for detecting signal transmission, the first magnetic component comprises a flow pipe (210) and a first installation shell (211), two ends of the flow pipe (210) are respectively communicated with the venous side blood loop (600), and a pressure sensor (212) with a detection end located in the flow pipe (210) and a first magnetic connector (213) electrically connected with the pressure sensor (212) are arranged in the first installation shell (211); the second magnetic component is provided with a second magnetic connector (220) matched with the first magnetic connector (213), and the transmission of the electric signal is detected by the pressure sensor (212) through the first magnetic connector (213) and the second magnetic connector (220);
A pump tube (300), wherein one end of the pump tube (300) is communicated with the upper end of the venous kettle (100), and the other end of the pump tube (300) is communicated with the atmosphere;
the peristaltic air pump (400) is arranged on the outer side of the host machine and used for extruding and air intake or exhaust of the pump pipe (300) so as to adjust the liquid level position of blood in the venous kettle (100).
2. A contactless back pressure monitoring system according to claim 1, characterized in that: and one end, far away from the venous kettle (100), of the pump tube (300) is provided with a gas filter (500).
3. A contactless back pressure monitoring system according to claim 1, characterized in that: the inside of vein kettle (100) and be located vein kettle (100) below and be provided with the filter screen.
4. A contactless back pressure monitoring system according to claim 3, characterized in that: the longitudinal section of the filter screen is in a truncated cone shape.
5. A contactless back pressure monitoring system according to any one of claims 1-4, wherein: the second magnetic assembly is provided with a second installation shell (221) for installing a second magnetic connector (220), the lower part of the second installation shell (221) is sleeved on the outer side of the first installation shell (211), and a limiting step (222) matched with the end face of the first installation shell (211) is arranged on the inner side of the lower part of the second installation shell (221).
6. A contactless back pressure monitoring system according to claim 5, wherein: the outer wall of the first installation shell (211) and the assembly surface of the second installation shell (221) are provided with convex ribs (214), and the inner wall of the second installation shell (221) and the assembly surface of the first installation shell (211) are provided with grooves (223) which are matched with each other.
7. A contactless back pressure monitoring system according to claim 6, wherein: an electromagnet (224) and an iron block (215) are arranged between the matching surfaces of the first installation shell (211) and the second installation shell (221), the iron block (215) is embedded on the first installation shell (211), the electromagnet (224) is arranged on the second installation shell (221), and connection and disconnection between the first installation shell (211) and the second installation shell (221) are realized by controlling on-off of a circuit in the electromagnet (224).
8. A contactless back pressure monitoring system according to claim 6, wherein: the first installation shell (211) and the second installation shell (221) are respectively provided with an installation cavity (225) for installing a corresponding magnetic connector, the shape of the installation cavity (225) is matched with that of the magnetic connector, the installation cavities (225) are respectively provided with an annular stop block (226) for limiting the magnetic connector on one side close to each other, and the magnetic connector is installed on one side, deviating from the annular stop block (226), of the installation cavity (225).
9. A contactless back pressure monitoring system according to claim 6, wherein: the utility model discloses a fluid pressure monitoring device, including runner pipe (210), first installation casing (211), second installation casing (221), through-hole (218) that are linked together with runner pipe (210) are equipped with in being used for with first installation casing (211) complex mount pad (216), be equipped with in mount pad (216) with mounting groove (217) of pressure sensor (212) looks adaptation, the bottom of mounting groove (217) is equipped with in through-hole (218) and flush with the inner wall of runner pipe (210) are stretched into to the detection end of pressure sensor (212), fluid pressure in runner pipe (210) monitors, second installation casing (221) are equipped with fixing base (227) that are used for carrying out monitoring devices overall fixation in one side that deviates from first installation casing (211).
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| CN117122759B (en) * | 2023-09-07 | 2024-05-03 | 南京汉科明德医疗科技有限公司 | Magnetic pressure monitoring device, extracorporeal circulation system and pressure measuring method |
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