CN217118419U - Diaphragmatic pressure measurement device - Google Patents
Diaphragmatic pressure measurement device Download PDFInfo
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- CN217118419U CN217118419U CN202123373182.1U CN202123373182U CN217118419U CN 217118419 U CN217118419 U CN 217118419U CN 202123373182 U CN202123373182 U CN 202123373182U CN 217118419 U CN217118419 U CN 217118419U
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- pressure
- stomach
- esophagus
- catheter
- diaphragm
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- 238000009530 blood pressure measurement Methods 0.000 title claims abstract description 22
- 210000002784 stomach Anatomy 0.000 claims abstract description 30
- 210000003238 esophagus Anatomy 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 238000003780 insertion Methods 0.000 claims description 20
- 230000037431 insertion Effects 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000001830 phrenic effect Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 14
- 239000010409 thin film Substances 0.000 description 6
- 210000003019 respiratory muscle Anatomy 0.000 description 5
- 208000004756 Respiratory Insufficiency Diseases 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004064 dysfunction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 201000004193 respiratory failure Diseases 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 206010003694 Atrophy Diseases 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 208000028399 Critical Illness Diseases 0.000 description 1
- 208000032376 Lung infection Diseases 0.000 description 1
- 206010038678 Respiratory depression Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000037444 atrophy Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000004220 muscle function Effects 0.000 description 1
- 230000009153 reflex inhibition Effects 0.000 description 1
- 230000004202 respiratory function Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model relates to a stride diaphragm pressure measuring device, including the Wheatstone bridge, still including striding the diaphragm pressure and measuring the body, stride the internal cavity that is equipped with of diaphragm pressure measurement, be provided with film varistor pressure sensor in the middle of the cavity, film varistor pressure sensor is connected to two measuring ends of Wheatstone bridge, film varistor pressure sensor separates the cavity and forms two sealed pressure storehouses, and at least one sealed pressure storehouse is provided with interface channel extremely stride the external terminal surface of diaphragm pressure measurement and pass through interface channel is connected with a pipe, the pipe is used for measuring stomach pressure or esophagus pressure with stomach or esophagus intercommunication. The utility model has the advantages of being simple in structure and convenient in operation, can direct measurement stomach and the pressure of esophagus through film varistor pressure sensor, sensitivity is high, has improved measurement accuracy greatly to small light in weight has alleviateed the uncomfortable sense of arranging in the stomach or in the esophagus, and is safe explosion-proof simultaneously, has improved security and stability in the use.
Description
Technical Field
The utility model relates to a respiratory function detection device especially relates to a stride diaphragm pressure measuring device.
Background
Respiratory failure caused by respiratory muscle dysfunction is more and more regarded by medical science, the respiratory muscle is used as a main external power source of external respiration, and the atrophy and the dysfunction of the respiratory muscle can cause respiratory depression, insufficient ventilation, cough reflex inhibition, increase of lung infection, difficulty in taking off a breathing machine and even respiratory failure to cause death. The diaphragm muscle is used as a main respiratory muscle and takes 60% -90% of inspiration function. The trans-diaphragm pressure refers to the difference between the intra-abdominal pressure and the intra-thoracic pressure, and since the intra-gastric pressure is substantially equal to the intra-abdominal pressure and the intra-esophageal pressure is substantially equal to the intra-thoracic pressure, the difference between the two is commonly used to represent the trans-diaphragm pressure. The existing trans-diaphragm pressure measuring device has the problems of large volume, poor mobility, low accuracy, poor safety and the like, which troubles clinicians. Therefore, a trans-diaphragm pressure measuring device with a portable structure, high accuracy and good safety is urgently needed in clinic, and is very important for timely understanding the respiratory muscle function of critically ill patients.
Disclosure of Invention
An object of the utility model is to provide a stride diaphragm pressure measuring device, the diaphragm pressure is striden in measurement that can be more accurate, safe.
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides a stride diaphragm pressure measuring device, includes the Wheatstone bridge, the device still includes and strides diaphragm pressure measuring body, stride the internal cavity that is equipped with of diaphragm pressure measuring, be provided with film varistor pressure sensor in the middle of the cavity, two measuring ends of Wheatstone bridge are connected film varistor pressure sensor, film varistor pressure sensor separates the cavity and forms two sealed pressure storehouses, at least one sealed pressure storehouse is provided with connecting channel to stride diaphragm pressure measuring body external end face and be connected with a pipe through connecting channel, the pipe is used for with stomach or esophagus intercommunication measurement stomach pressure or esophagus pressure.
Furthermore, the two sealed pressure chambers are respectively provided with a connecting channel to the outer end surface of the trans-diaphragmatic pressure measuring body, the two sealed pressure chambers are respectively connected with a catheter through the two connecting channels, and the two catheters are respectively used for being communicated with the stomach and the esophagus to measure the pressure difference between the stomach and the esophagus.
Further, the catheter has a hydrophilic coating on the outside.
Furthermore, the insertion end of the catheter is connected with a flexible spring, one end of the flexible spring extends into the catheter and is fixedly connected with the catheter, and the outer side of the other end of the flexible spring is wrapped with a rubber layer to form a round insertion end.
Furthermore, one side of the round opening insertion end of the flexible spring is connected with a traction guide wire, a guide wire channel is arranged on the catheter, and the traction guide wire extends to the outside of the catheter through the guide wire channel.
Further, the tail part of the traction guide wire is provided with a finger ring end.
Further, a spiral fixing cap is arranged at the opening of the guide wire channel.
Further, the number of the drawing guide wires and the number of the guide wire channels are both two.
The utility model has the advantages that: the utility model has the advantages of being simple in structure and convenient in operation, can direct measurement stomach and the pressure of esophagus through film varistor pressure sensor, sensitivity is high, has removed traditional gasbag formula pressure measurement device's gasbag from the influence of taking pressure from, has improved measurement accuracy greatly, and stride diaphragm pressure measurement device small light in weight, alleviateed arrange in the stomach or the uncomfortable sense in the esophagus in, simultaneously safe explosion-proof has improved security and stability in the use.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic structural diagram of a trans-phrenic pressure measurement device according to an embodiment;
FIG. 2 is a schematic structural diagram of a second embodiment of a trans-phrenic pressure measuring device;
fig. 3 is a schematic view of a catheter structure.
In the figure, 1: a Wheatstone bridge; 2: a trans-phrenic pressure measurement volume; 201: a first sealed pressing bin; 201-1: a first connecting channel; 202: a second sealed pressing bin; 202-1: a second connecting channel; 3: a first conduit; 4: a second conduit; 5: a round mouth insertion end; 6: a flexible spring; 7: drawing the guide wire; 701: a finger ring end; 8: a guidewire channel; 9: a screw fixing cap; rx: a thin film varistor pressure sensor; r1: an adjustable resistor; r2, R3: the resistance is fixed.
Detailed Description
The utility model discloses a stride diaphragm pressure measuring device, as shown in fig. 1 to 3, including wheatstone bridge 1, the device is still including striding diaphragm pressure measurement body 2, wherein striding and being equipped with the cavity in the diaphragm pressure measurement body 2, is provided with film varistor pressure sensor Rx in the middle of the cavity, and film varistor pressure sensor Rx is connected to two measuring ends of wheatstone bridge 1, and film varistor pressure sensor Rx will stride diaphragm pressure measurement body 2 internal cavities and separate and form two sealed pressure storehouses, and at least one sealed pressure storehouse is provided with interface channel to stride diaphragm pressure measurement body 2 outer terminal surface and be connected with a pipe through interface channel, the pipe is used for with stomach or esophagus intercommunication measurement stomach pressure or esophagus pressure.
The wheatstone bridge 1 is composed of an adjustable resistor R1, two fixed resistors R2 and a film varistor pressure sensor Rx, the adjustable resistor R1 is used for calibration when the bridge is connected to the film varistor pressure sensor Rx, so that the galvanometer connected to two ends of the wheatstone bridge 1 is 0, namely, the bridge balance state is achieved, and the galvanometer can be a voltmeter or an ammeter. The trans-diaphragm pressure measuring body 2 is composed of a glass body, the resistance value of the thin film variable resistance pressure sensor Rx changes along with the change of pressure, and the resistance value and the pressure value are in a linear relation. When the pressure of the measuring part, namely the stomach or the esophagus, enters the sealed pressure cabin through the connecting channel, the film of the pressure sensor slightly bulges upwards under the action of external force, elastic deformation occurs, the resistance value of the film rheostatic pressure sensor Rx can be changed at the moment, the balance of an original Wheatstone bridge is damaged, the change of the galvanometer is reflected, the pressure value of the stomach and the esophagus can be obtained through calculation, and then the value of the trans-diaphragm pressure is obtained, or the value of the trans-diaphragm pressure is directly obtained through calculation.
Specifically, the outer side of the catheter is provided with a hydrophilic coating which is harmless to a human body, and the catheter is wetted by water before being inserted into the stomach or esophagus, so that the surface friction force can be reduced, and the pain of a patient during intubation can be relieved.
Specifically, the insertion end of the catheter is connected with a flexible spring 6, one end of the flexible spring extends into the catheter and is fixedly connected with the catheter, and the rubber layer is wrapped on the outer side of the other end of the flexible spring to form a round-mouth insertion end 5, so that when the catheter is inserted into a stomach or an esophagus, damage to body tissues, mucous membranes and the like can be reduced. One side of the round opening insertion end of the flexible spring is connected with a traction guide wire 7, a guide wire channel 8 is arranged on the catheter, the traction guide wire 7 extends to the outside of the catheter through the guide wire channel 8, a finger ring end 701 is arranged at the tail part of the traction guide wire 7, and a spiral fixing cap 9 is arranged at the opening part of the guide wire channel 8. The direction of the flexible spring can be controlled by drawing the guide wire, so that the direction of the round-mouth insertion end can be conveniently adjusted, manual operation is facilitated by the ring end, and the drawing guide wire is controlled. After the direction of the insertion end is adjusted, the traction guide wire can be fixed through the spiral fixing cap, the traction guide wire is fixed when the spiral fixing cap is rotated clockwise, and the traction guide wire is loosened when the spiral fixing cap is rotated anticlockwise.
Example one
The present embodiment is an example of the practical application of the above-described embodiment.
The device for measuring trans-diaphragm pressure disclosed by the embodiment comprises a wheatstone bridge 1 and a trans-diaphragm pressure measuring body 2, wherein a cavity is arranged in the trans-diaphragm pressure measuring body 2, a thin film variable resistance pressure sensor Rx is arranged in the middle of the cavity, two measuring ends of the wheatstone bridge 1 are connected with the thin film variable resistance pressure sensor Rx, the thin film variable resistance pressure sensor Rx separates the cavity in the trans-diaphragm pressure measuring body 2 to form two sealed pressure chambers 201 and 202, one sealed pressure chamber 201 is provided with a connecting channel 201-1 to the outer end face of the trans-diaphragm pressure measuring body 2 and is connected with a conduit 3 through the connecting channel 201-1, and the conduit 3 is used for communicating with the stomach or esophagus to measure the stomach pressure or the esophagus pressure; the other sealed press bin 202 is a vacuum bin.
As shown in fig. 3, the catheter 3 has a hydrophilic coating on the outside, which is harmless to the human body. The inserting end of the conduit 3 is connected with a flexible spring 6, one end of the flexible spring extends into the conduit and is fixedly connected with the conduit, and the outer side of the other end of the flexible spring is wrapped with a rubber layer to form a round-mouth inserting end 5. One side of the round opening insertion end of the flexible spring is connected with two traction guide wires 7, the catheter is provided with two guide wire channels 8, the two traction guide wires respectively extend to the outside of the catheter 3 through the two guide wire channels, the tail part of each traction guide wire is provided with a finger ring end 701, and the opening part of each guide wire channel 8 is provided with a spiral fixing cap 9.
In practical use, firstly, the measuring device is subjected to range calibration, in this embodiment, a voltmeter is used, and after the thin film varistor pressure sensor Rx is connected, the adjustable resistor R1 is adjusted so that the value of the voltmeter connected to the two ends of the wheatstone bridge 1 is 0. Before measurement, an inflation tube of the sphygmomanometer is led out from the inflation bag to be connected with the catheter 3, and when the pressure value of the sphygmomanometer is P1, the value of a measured voltmeter is U1; knowing that the measured pressure value and the voltage value are in a linear relationship, assuming that y is the measured pressure value and x is the voltage value, the following formula is followed:
y = k1·x （1）
substituting the measured P1 and U1 into equation (1) yields the value of k 1.
When the measuring device is used for measuring, the measuring device is calibrated firstly so that the value of a voltmeter connected at two ends of the Wheatstone bridge 1 is 0, then the catheter 3 is wetted by water and inserted into the stomach of a patient, the direction of the insertion end of the catheter can be adjusted by the traction guide wire in the insertion process, the traction guide wire can be fixed by the spiral fixing cap after the direction is adjusted, and when the insertion end of the catheter is accurately inserted into the stomach of the patient, the reading of the voltmeter at the moment is observed. From the voltage value at this time, Pga is obtained as a pressure value in the stomach according to the formula (1). In the same way, after the measuring device is calibrated, the catheter 3 is inserted into the esophagus of a patient, the reading of the voltmeter is observed, and the pressure value in the esophagus is Pes according to the voltage value at the moment. Therefore, the patient transphrenic pressure Pdi can be found to have the following values:
Pdi = Pga – Pes （2）
the trans-phrenic pressure value of the patient can be obtained.
Example two
The present embodiment is another example of the practical application of the above embodiment.
The phrenic pressure measuring device disclosed in the present embodiment, as shown in fig. 2, includes a wheatstone bridge 1, the device further includes a phrenic pressure measuring body 2, wherein a cavity is arranged in the trans-diaphragm pressure measuring body 2, a film varistor pressure sensor Rx is arranged in the middle of the cavity, two measuring ends of the Wheatstone bridge 1 are connected with the film varistor pressure sensor Rx, the film varistor pressure sensor Rx separates the cavity in the trans-diaphragm pressure measuring body 2 to form two sealed pressure chambers 201 and 202, one of the sealed pressure chambers 201 is provided with a connecting channel 201-1 to the outer end face of the trans-diaphragmatic pressure measuring body 2 and is connected with a catheter 3 through the connecting channel 201-1, the other sealed pressure chamber 202 is provided with a connecting channel 202-1 to the outer end face of the trans-diaphragmatic pressure measuring body 2 and is connected with a catheter 4 through the connecting channel 202-1, and the catheter 3 and the catheter 4 are respectively used for being communicated with the stomach and the esophagus to measure the stomach pressure and the esophagus pressure.
As shown in fig. 3, both the catheter 3 and the catheter 4 have a hydrophilic coating on the outside, which is harmless to the human body. The inserting ends of the guide pipe 3 and the guide pipe 4 are both connected with a flexible spring 6, one end of the flexible spring extends into the guide pipe and is fixedly connected with the guide pipe, and the outer side of the other end of the flexible spring is wrapped with a rubber layer to form a round-mouth inserting end 5. One side of the round opening insertion end of the flexible spring is connected with two traction guide wires 7, the catheter is provided with two guide wire channels 8, the two traction guide wires respectively extend to the outside of the catheter 3 through the two guide wire channels, the tail part of each traction guide wire is provided with a finger ring end 701, and the opening part of each guide wire channel 8 is provided with a spiral fixing cap 9.
In actual use, the measuring device is first calibrated, in this embodiment, a voltmeter is used, and the adjustable resistor R1 is adjusted so that the value of the voltmeter connected across the wheatstone bridge 1 is 0. Before measurement, an inflation tube of the sphygmomanometer is led out from the inflation bag to be connected with the catheter 3, the catheter 4 is plugged, and when the pressure value of the sphygmomanometer is P2, the value of a measured voltmeter is U2; knowing that the measured pressure value and the voltage value are in a linear relationship, assuming that y is the measured pressure value and x is the voltage value, the following formula is followed:
y = k2·x （3）
substituting the measured values into equation (3) yields the value of k 2.
When the measurement is carried out, the measuring device is calibrated firstly, then the catheter 3 is wetted by water and inserted into the stomach of a patient, the direction of the insertion end of the catheter can be adjusted by pulling the guide wire in the insertion process, the pulling guide wire can be fixed by the spiral fixing cap after the direction is adjusted, and then the insertion end of the catheter is accurately inserted into the stomach of the patient. In the same manner, the catheter 4 is inserted into the oesophagus of the patient and the reading of the voltmeter is observed at that time. According to the voltage value at this time, the pressure difference between the stomach and the esophagus of the patient, namely the transdiaphragm pressure Pdi, can be directly obtained by substituting the voltage value into the formula (3).
The above description is only for the purpose of illustration and not limitation, and the present invention can be further modified with various changes and modifications without departing from the spirit and scope of the present invention, which should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a surmount diaphragm pressure measuring device, includes the Wheatstone bridge, its characterized in that, the device still includes the surmount diaphragm pressure measurement body, be equipped with the cavity in the surmount diaphragm pressure measurement body, be provided with film varistor pressure sensor in the middle of the cavity, two measuring ends of Wheatstone bridge connect film varistor pressure sensor, film varistor pressure sensor separates the cavity and forms two sealed pressure storehouses, at least one sealed pressure storehouse be provided with connect the passageway to the external terminal surface of surmount diaphragm pressure measurement body and be connected with a pipe through the connect the passageway, the pipe is used for with stomach or esophagus intercommunication measurement stomach pressure or esophagus pressure.
2. The transseptal pressure measurement device of claim 1, wherein the two sealed pressure chambers are respectively provided with a connecting channel to the external end surface of the transseptal pressure measurement body, the two sealed pressure chambers are respectively connected with a catheter through the two connecting channels, and the two catheters are respectively used for communicating with the stomach and the esophagus to measure the pressure difference between the stomach and the esophagus.
3. A trans-phrenic pressure measurement device according to claim 1 or 2, wherein the outside of the catheter has a hydrophilic coating.
4. A trans-diaphragm pressure measuring device according to claim 3, wherein the insertion end of the conduit is connected with a flexible spring, one end of the flexible spring extends into the conduit and is fixedly connected with the conduit, and the outer side of the other end of the flexible spring is wrapped with a rubber layer to form a round insertion end.
5. The transseptal pressure measurement device of claim 4, wherein a pull guide wire is connected to one side of the round-mouth insertion end of the flexible spring, a guide wire channel is arranged on the catheter, and the pull guide wire extends to the outside of the catheter through the guide wire channel.
6. A transseptal pressure measurement device as claimed in claim 5, wherein the trailing portion of the pull wire is provided with a finger loop end.
7. The phrenic pressure measurement device of claim 5, wherein a screw fixing cap is arranged at the opening of the guide wire channel.
8. A transphrenic pressure measurement device according to claim 5, wherein the number of pull wires and wire channels is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123373182.1U CN217118419U (en) | 2021-12-30 | 2021-12-30 | Diaphragmatic pressure measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123373182.1U CN217118419U (en) | 2021-12-30 | 2021-12-30 | Diaphragmatic pressure measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217118419U true CN217118419U (en) | 2022-08-05 |
Family
ID=82619465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123373182.1U Active CN217118419U (en) | 2021-12-30 | 2021-12-30 | Diaphragmatic pressure measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217118419U (en) |
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2021
- 2021-12-30 CN CN202123373182.1U patent/CN217118419U/en active Active
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