CN120305491B - Medical perfusion pump pressure flow monitoring device - Google Patents
Medical perfusion pump pressure flow monitoring deviceInfo
- Publication number
- CN120305491B CN120305491B CN202510813575.3A CN202510813575A CN120305491B CN 120305491 B CN120305491 B CN 120305491B CN 202510813575 A CN202510813575 A CN 202510813575A CN 120305491 B CN120305491 B CN 120305491B
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- pressure
- pressure measuring
- measuring
- mounting seat
- diaphragm mounting
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Abstract
The invention discloses a pressure flow monitoring device of a medical perfusion pump, which comprises a pressure measuring component and a sensor component, wherein the pressure measuring component is provided with a diaphragm mounting seat with a built-in pressure measuring base cavity, the pressure measuring base cavity can be used for perfusion liquid to enter and exit, the diaphragm mounting seat is arranged on the outer wall and is provided with two pressure measuring gaps communicated to the pressure measuring base cavity along the flowing direction of the perfusion liquid, each pressure measuring gap is respectively sealed by a pressure measuring diaphragm, the pressure measuring base cavity is provided with an orifice for reducing the cross section of the cavity between the two pressure measuring gaps, the sensor component is provided with a pressure sensor for laminating and measuring the pressure of the two pressure measuring diaphragms in a one-to-one correspondence manner, the problem of low reliability caused by single-point pressure measurement can be avoided by combining a double-point pressure measuring design with an orifice pressure difference flow measuring design, and simultaneously, real-time flow monitoring is synchronously completed under the condition that no additional flow sensor is carried, thereby finally helping doctors accurately control perfusion parameters, optimizing the visual field of operation and improving the safety of operation.
Description
Technical Field
The invention relates to the technical field of perfusion pumps, in particular to the technical field of pressure monitoring devices of perfusion pumps.
Background
In endoscopic surgery, the perfusion pump plays an irreplaceable role as a key device, and can continuously pump sterile solutions such as physiological saline into an operation cavity to realize pressurized expansion of an operation area, so that the pressurized expansion can not only effectively separate tissue gaps and create enough operation space to form a clear visual interval, but also maintain the stability of an operation field, simultaneously, the continuous liquid flow of the perfusion pump can also timely flush pollutants such as blood and tissue fragments in the operation field, keep the cavity clean, remarkably improve the observation condition of a doctor, and the doctor can obtain the optimal definition of the operation field by adjusting perfusion parameters, so that the method is very important for identification of fine tissues, protection of important structures and accuracy of operation.
In the process of filling, the accuracy and the safety of liquid pressure measurement are directly related to diagnosis and treatment effects and life health of a patient, more and more manufacturers choose to adopt a non-contact liquid pressure measurement design in a filling pump because a traditional contact pressure measurement mode possibly causes liquid pollution, cross infection and sensor corrosion (a non-contact liquid pressure measurement structure can effectively avoid the hidden danger through physical isolation and provide reliable guarantee for clinical operation), and based on the fact, the invention patent with the publication number of CN104739520B discloses a control method of a medical filling pump and a system using the method, wherein the medical filling pump comprises an adaptive controller, a pressure detection device, a flow rate detection device, a control signal executor and the filling pump, and can calculate the pressure of a filling point according to the output pressure of the filling pump, the output flow rate of a filling pipeline and the hydrostatic pressure of the output end of the filling pipeline, and then indirectly control the flow rate of the filling pump through pressure feedback.
In addition, the utility model with the publication number of CN219646432U also discloses an induction monitoring device using the peristaltic pump, but flow monitoring data of the induction monitoring device are obtained through calculation of the rotation speed of a motor of the peristaltic pump, and the theoretical calculated flow and the actual flow are often different, and in addition, the pressure measuring consumable material cannot be reused.
Disclosure of Invention
The invention provides a medical perfusion pump pressure flow monitoring device, which combines a two-point pressure measurement design and an orifice pressure difference flow measurement design, so that the problem of low reliability caused by single-point pressure measurement can be avoided, and simultaneously, the real-time flow monitoring is synchronously completed without additionally carrying a flow sensor, thereby finally helping doctors to accurately control perfusion parameters, optimizing the visual field definition of an operation and improving the safety of the operation.
In order to achieve the above purpose, the invention provides a medical perfusion pump pressure flow monitoring device, which comprises a pressure measuring component and a sensor component, wherein the pressure measuring component is provided with a diaphragm mounting seat with a built-in pressure measuring base cavity, the pressure measuring base cavity can be used for perfusion liquid to enter and exit, the diaphragm mounting seat is arranged on the outer wall and is provided with two pressure measuring gaps communicated with the pressure measuring base cavity along the flow direction of the perfusion liquid, each pressure measuring gap is respectively sealed by a pressure measuring diaphragm, the pressure measuring base cavity is provided with an orifice which reduces the cross section of a cavity between the two pressure measuring gaps, and the sensor component is provided with a pressure sensor which is in fit with the two pressure measuring diaphragms one by one for pressure measurement.
Preferably, the sensor assembly simultaneously and detachably carries two pressure sensors through the positioning seat, and the diaphragm mounting seat is detachably connected with the positioning seat.
Preferably, each pair of pressure measuring diaphragms is isolated from the pressure sensor by a pressure sensing piece.
Preferably, the diaphragm mounting seat is inserted into the positioning seat along the slot, two pressure sensing pieces are uniformly distributed on the same side of the slot, a screw hole is further formed in the slot relative to the other side where the pressure sensing pieces are arranged, and the sensor assembly can utilize a locking mechanism screwed into the screw hole to prop the diaphragm mounting seat until each pair of pressure measuring diaphragms are attached to the pressure sensing pieces.
Preferably, the two pressure sensors are respectively placed in the base plate along the base holes, the base plate faces one side of the positioning seat, guide rings blocked by the pressure sensing pieces are respectively arranged on the peripheries of the two pressure sensors, one side, which faces away from the positioning seat, of the base plate is closed by the sealing plate, the base plate is in threaded connection with the sealing plate through the fastening pieces, and the sealing plate is in threaded connection with the positioning seat through the fastening pieces.
Preferably, the positioning seat is provided with an opening into which two guide rings provided with pressure sensing pieces can be inserted, and the two pressure sensing pieces are not protruded out of the opening.
Preferably, the two pressure measuring diaphragms are all silica gel diaphragms, the diaphragm mounting seat is a plastic seat or a stainless steel seat, and the two pressure sensing parts are PPSU parts.
Preferably, the diaphragm mounting seat is connected to the endoscope through a first conduit at the liquid outlet, a peristaltic tube with a disc bypassing the peristaltic device is arranged at the liquid inlet of the diaphragm mounting seat, and the peristaltic tube is connected to the liquid storage container through a third conduit.
Preferably, the positioning seat is provided with a bayonet for clamping the peristaltic tube or the third conduit.
Preferably, the first conduit and the peristaltic tube are respectively connected with the diaphragm mounting seat in an inserting mode through a pipe joint, and the peristaltic tube and the third conduit are connected with each other in an inserting mode through the pipe joint.
The invention has the beneficial effects that:
1) The redundant pressure monitoring design is that by arranging two pairs of pressure measuring diaphragms and pressure sensors, on one hand, liquid can be prevented from directly contacting the two pressure sensors, so that the two pressure sensors are prevented from corrosion, pollution and cross infection are prevented, on the other hand, the redundant design can be utilized to enable a system to automatically utilize the rest pressure sensors to continuously monitor the fluid pressure when one of the pressure sensors fails, finally, the measuring precision is ensured, the overpressure risk is prevented, and the operation effect is improved;
2) The throttle type flow monitoring design is that through arranging the throttle hole which reduces the cross section of the cavity between two pressure measuring points, the flow can be calculated by utilizing the pressure difference generated when the liquid flows through the throttle hole, thus realizing the real-time monitoring of the liquid flow (saving the purchase and installation costs of the flow sensor) without additionally arranging the flow sensor, leading the user to be capable of timely identifying and processing the phenomena of overpressure in the cavity, pipeline blockage or pipeline leakage and the like, and having simple structure, low cost, no movable parts and convenient maintenance;
3) The pressure measuring component with the pressure measuring diaphragm is detachably connected with the sensor component with the pressure sensor, and the sensor component simultaneously and detachably bears the two pressure sensors through the positioning seat, so that the failed pressure monitoring module can be independently replaced (without maintenance of the whole machine), and the maintenance cost is effectively reduced;
4) The diaphragm mounting seat for bearing the pressure measuring diaphragms is connected with the positioning seat for bearing the pressure sensors in an inserting way, so that the assembly process can be effectively simplified, the operation preparation time is reduced, and the locking mechanism is also assembled on the positioning seat in a threaded manner, so that the two pressure measuring diaphragms can be correspondingly attached to the pressure sensors one by one when the locking mechanism is rotated, and the pressure measurement accuracy is ensured;
5) The diaphragm isolation design is that the pressure sensing pieces are respectively additionally arranged between the two pairs of pressure measuring diaphragms and the pressure sensors, and meanwhile, the two pressure sensing pieces are not protruded out of the installation plane, so that the two pressure sensing pieces can be utilized to respectively carry out double protection on the corresponding pressure sensors, the scratch phenomenon of the pressure measuring surfaces is prevented, meanwhile, the leakage of liquid to the pressure measuring positions is avoided, and the service life of the pressure measuring diaphragm can be prolonged.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic operation of the first embodiment;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is an assembled schematic view of the pressure measurement component of the first embodiment;
FIG. 4 is a schematic perspective view of a sensor assembly according to a second embodiment;
FIG. 5 is an exploded view of a sensor assembly of the second embodiment;
In the figure, a 1-host machine, a 2-pump wheel, a 3-pressing block, a 4-pressure measuring component, a 41-pressure measuring diaphragm, a 42-diaphragm mounting seat, a 5-sensor assembly, a 51-positioning seat, a 52-pressure sensing piece, a 53-locking mechanism, a 54-pressure sensor, a 55-sealing plate, a 6-third guide pipe, a 7-first guide pipe, an 8-peristaltic pipe and a 9-endoscope are shown.
Detailed Description
Embodiment one:
Referring to fig. 1 to 3, the present embodiment includes a pressure measuring component 4 and a sensor assembly 5, the pressure measuring component 4 has a membrane mounting seat 42 with a pressure measuring base cavity therein, the pressure measuring base cavity is provided with a perfusion liquid inlet and outlet, the membrane mounting seat 42 is provided with two pressure measuring notches communicated to the pressure measuring base cavity along the flow direction of the perfusion liquid, each pressure measuring notch is respectively closed by a pressure measuring membrane 41, the pressure measuring base cavity is provided with an orifice between the two pressure measuring notches to reduce the cross section of the cavity, and the sensor assembly 5 has a pressure sensor 54 bonded with the two pressure measuring membranes 41 in a one-to-one correspondence manner for pressure measurement; the two pressure measuring diaphragms 41 are positioned at two pressure measuring points for monitoring the liquid filling pressure in real time, during the pressure measuring, because the aperture of the orifice is smaller than the pipe diameter of the pressure measuring base cavity, based on Bernoulli equation, the phenomenon of flow velocity increase and static pressure decrease can occur when the filling liquid flows to the orifice, that is, the pressure difference can be generated when the filling liquid flows through the orifice, and the larger the fluid flow rate is, the larger the pressure difference occurs, at the moment, the flow rate can be calculated according to the monitoring pressure difference, the real-time monitoring of the liquid flow rate is finally realized, no other flow sensor is needed, the structure is simple and the cost is low, and when the number of the pressure sensors 54 is increased, the redundancy of the device structure can be improved, so that the pressure measuring precision and the pressure measuring reliability are further improved.
The sensor assembly 5 can simultaneously and detachably bear two pressure sensors 54 through the positioning seat 51, the diaphragm mounting seat 42 is detachably connected with the positioning seat 51, and the sensor assembly 5 can be mounted on the host machine 1 as an integral assembly through the modularized design, and if one of the pressure sensors 54 fails, a fault module can be independently replaced (without maintenance of the whole machine).
The diaphragm mounting seat 42 is connected to the endoscope 9 through the first conduit 7 at the liquid outlet, the peristaltic tube 8 with a disc bypassing the peristaltic device is mounted at the liquid inlet of the diaphragm mounting seat 42, the peristaltic tube 8 is connected to a liquid storage container through the third conduit 6, wherein the liquid storage container can be a container for containing perfusion liquid such as an infusion bag or an infusion bottle, in addition, the peristaltic device is a peristaltic pump (which is not improved here and only needs to be adopted in the prior art) for realizing fluid delivery through periodically squeezing a hose, and the peristaltic device and the sensor assembly 5 can be respectively mounted at the front panel of the host computer 1 during assembly.
The positioning seat 51 is provided with a bayonet for clamping the peristaltic tube 8 or the third conduit 6.
The peristaltic pump comprises a first conduit 7, a peristaltic tube 8, a diaphragm mounting seat 42, a peristaltic tube 8, a one-way valve, a peristaltic pump 8 and a peristaltic pump 8, wherein the first conduit 7 and the peristaltic tube 8 are respectively connected with the diaphragm mounting seat 42 through a pipe joint, the peristaltic tube 8 and the third conduit 6 are connected together through the pipe joint, the first conduit 7, the peristaltic tube 8 and the third conduit 6 are all silica gel tubes, the peristaltic tube 8 can be extruded together by a pressing block 3 and a rotating pump wheel 2 during operation so as to enable the peristaltic tube 8 to be closed at an extrusion point, the peristaltic tube 8 behind the extrusion point can generate negative pressure inside and suck perfusate into the tube when the peristaltic tube is restored, the extrusion point can gradually move forwards and push fluid to flow towards an outlet direction along with the continued rotation of the pump wheel 2, in addition, the elastic closing characteristic of the peristaltic tube 8 can naturally form a one-way valve effect so that backflow is prevented, and the working fit between the peristaltic pump and the peristaltic tube 8 is the same as in the prior art.
The working procedure of this embodiment is:
During the perfusion, the perfusate can flow into the operation cavity along the route of the saline bag, the third conduit 6, the peristaltic tube 8, the diaphragm mounting seat 42, the first conduit 7 and the endoscope 9 under the driving action of the peristaltic device, in addition, the sensor component 5 can feed back the pressure parameter measured in real time to the host 1 for comparison with a set value, at the moment, if the pressure parameter reaches the set value, the perfusion pump continues to work normally, and if the pressure parameter does not reach the set value, the peristaltic device can be used for adjusting the peristaltic speed to realize pipeline pressure adjustment.
During the test, if the pressure is very low or close to zero, the dual sensor means that there is a leakage point in the perfusion line (i.e. the first conduit 7, peristaltic tube 8 and third conduit 6) or in the pressure measurement base cavity, if the pressure difference between the two pressure measurement points is too large, at least one of the pressure sensors 54 fails, if the pressure difference between the two pressure measurement points is within the normal range, it is proved that the intra-cavity pressure of the pressure measurement base cavity is stable, if there is no pressure difference between the two pressure measurement points, it is proved that the endoscope is blocked by tissue, the cavity is overpressurized, resulting in excessive absorption of the perfusate (this may cause dilutional hyponatremia).
Embodiment two:
Referring to fig. 4 to 5, the two pairs of pressure measuring diaphragms 41 and the pressure sensors 54 are respectively isolated by the pressure sensing pieces 52, wherein the two pressure sensing pieces 52 can be isolated between the corresponding pressure measuring diaphragms 41 and the pressure sensors 54, so that the two pressure sensors 54 are prevented from being scratched on the pressure measuring surface, and liquid can be effectively prevented from leaking to the two pressure sensors 54.
The diaphragm mounting seat 42 is inserted into the positioning seat 51 along the slot, the two pressure sensing pieces 52 are uniformly arranged on the same side of the slot, a screw hole is further formed in the slot opposite to the side on which the pressure sensing pieces 52 are arranged, the sensor assembly 5 can support the diaphragm mounting seat 42 until the two pairs of pressure measuring diaphragms 41 are attached to the pressure sensing pieces 52 by using a locking mechanism 53 screwed into the screw hole, that is, the pressure measuring component 4 and the sensor assembly 5 can be locked together by using the locking mechanism 53, and meanwhile, the sensing surfaces of the two pressure sensing pieces 52 can be respectively attached to the end surfaces of the corresponding pressure measuring diaphragms 41 tightly, so that the accuracy of pressure measurement is ensured.
The two pressure sensors 54 are respectively placed into the base plate along the base holes, the base plate faces one side of the positioning seat 51, guide rings blocked by the pressure sensing pieces 52 are respectively arranged on the periphery of the two pressure sensors 54, one side, which faces away from the positioning seat 51, is closed by the sealing plates 55, the base plate is in threaded connection with the sealing plates 55 through fasteners, and the sealing plates 55 are in threaded connection with the positioning seat 51 through the fasteners.
The positioning seat 51 has an opening into which two guide rings provided with pressure sensing members 52 can be inserted, and both the pressure sensing members 52 are not protruded from the opening.
The two pressure measuring diaphragms 41 are silica gel diaphragms, the diaphragm mounting seats 42 are plastic seats or stainless steel seats, the two pressure sensing pieces 52 are PPSU parts, the diaphragm mounting seats 42 are made of plastic materials if the pressure measuring parts are disposable pressure measuring consumable parts, the diaphragm mounting seats 42 are made of stainless steel materials if the pressure measuring parts are reusable parts, the two pressure measuring diaphragms 41 can be detachably assembled at corresponding pressure measuring gaps respectively when the diaphragm mounting seats 42 are stainless steel seats, protruding lugs can be additionally arranged on the outer edges of the pressure measuring diaphragms 41 for facilitating assembly and disassembly of the pressure measuring diaphragms 41, and in addition, the pump wheel 2 and the pressing block 3 can be stainless steel parts or plastic parts for peristaltic pumps.
Other embodiments are the same as the first embodiment.
The working procedure of this embodiment is:
before use, the diaphragm mounting seat 42 is inserted into the positioning seat 51 along the inserting slot and the two pairs of pressure measuring diaphragms 41 are correspondingly attached to the pressure sensing pieces 52, then the locking mechanism 53 is screwed to push the diaphragm mounting seat 42 towards one side of the positioning seat 51 with the two pressure sensing pieces 52 and form slight displacement, so that the two pressure measuring diaphragms 41 are respectively attached to the corresponding pressure sensing pieces 52, pipeline liquid pressure can be transmitted from the two pressure measuring diaphragms 41 to the corresponding pressure sensors 54 respectively through the corresponding pressure sensing pieces 52, then the first guide pipe 7 is inserted between the diaphragm mounting seat 42 and the endoscope, finally one end of the peristaltic tube 8 is inserted with the mounting seat 42, and then the other end of the peristaltic tube 8 is inserted with a saline bag (a liquid storage container) through the third guide pipe 6 after bypassing the pump wheel 2, and in addition, the connecting part of the peristaltic tube 8 and the third guide pipe 6 can be clamped with the positioning seat 51 along the bayonet.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510813575.3A CN120305491B (en) | 2025-06-18 | 2025-06-18 | Medical perfusion pump pressure flow monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510813575.3A CN120305491B (en) | 2025-06-18 | 2025-06-18 | Medical perfusion pump pressure flow monitoring device |
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| CN120305491A CN120305491A (en) | 2025-07-15 |
| CN120305491B true CN120305491B (en) | 2025-09-16 |
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| CN202510813575.3A Active CN120305491B (en) | 2025-06-18 | 2025-06-18 | Medical perfusion pump pressure flow monitoring device |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214421363U (en) * | 2021-01-19 | 2021-10-19 | 灵丹科技(杭州)有限公司 | Pressure transmitter of oil storage tank |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6076409A (en) * | 1997-12-22 | 2000-06-20 | Rosemount Aerospace, Inc. | Media compatible packages for pressure sensing devices |
| DE19934081B4 (en) * | 1999-07-15 | 2005-12-01 | W.O.M. World Of Medicine Ag | Pressure measuring device for fluids flowing in lines |
| DE10305036A1 (en) * | 2003-02-07 | 2004-08-26 | Richard Wolf Gmbh | Medical pump pressure sensor has two pressure measurement elements on single circuit board in membrane coupled housing |
| CN109577891B (en) * | 2018-12-03 | 2020-12-08 | 西南石油大学 | An overflow monitoring method for deepwater oil and gas wells |
| CN115569286A (en) * | 2021-07-06 | 2023-01-06 | 北京万生人和科技有限公司 | Pressure measuring device and urine dynamic instrument |
| US20240424204A1 (en) * | 2021-09-22 | 2024-12-26 | Carefusion 303, Inc. | Interlocked sensor assembly for infusion system |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214421363U (en) * | 2021-01-19 | 2021-10-19 | 灵丹科技(杭州)有限公司 | Pressure transmitter of oil storage tank |
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