CN112568893A - Flow sensor for pulmonary function detection - Google Patents
Flow sensor for pulmonary function detection Download PDFInfo
- Publication number
- CN112568893A CN112568893A CN201910929756.7A CN201910929756A CN112568893A CN 112568893 A CN112568893 A CN 112568893A CN 201910929756 A CN201910929756 A CN 201910929756A CN 112568893 A CN112568893 A CN 112568893A
- Authority
- CN
- China
- Prior art keywords
- flow sensor
- pressure
- hole
- mouthpiece
- sensor according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000009325 pulmonary function Effects 0.000 title claims description 4
- 238000001514 detection method Methods 0.000 title description 8
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000013022 venting Methods 0.000 claims 1
- 230000004199 lung function Effects 0.000 abstract description 18
- 238000012360 testing method Methods 0.000 abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 5
- 210000003296 saliva Anatomy 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 210000000867 larynx Anatomy 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 208000000884 Airway Obstruction Diseases 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000004202 respiratory function Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/087—Measuring breath flow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/091—Measuring volume of inspired or expired gases, e.g. to determine lung capacity
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pulmonology (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Physiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention provides a flow sensor for detecting lung function, which comprises a substrate, wherein the substrate is provided with a through hole, a first pressure taking port and a second pressure taking port, the inner diameters of the through hole are kept consistent, a throttle plate is arranged in the through hole, and the throttle plate is provided with a small hole. Get the pressure port and set up in the place that saliva or condensate water should not gather, in the test process, flow sensor can not only effectively avoid saliva or condensate water jam to get the pressure port condition, and the air resistance in the flow sensor is little. The processing is convenient, and the qualification rate of finished products is improved.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a flow sensor for detecting lung function.
Background
The functions of the organs of the human body can only work normally under the condition of sufficient oxygen supply. The oxygen supply of the human body is obtained exclusively by the respiration of the lungs, which take in oxygen and expel the metabolite carbon dioxide during respiration. The lung function detection result can analyze the respiratory function of a tester, and has practical clinical significance in identifying the type of airway obstruction, evaluating the lung function before chest and abdomen surgery and the like.
According to different detection principles, lung function detectors can be classified into a float-type lung function testing device, a rotary-type lung function testing device, and a lung function testing device with a flow sensor as shown in chinese patent ZL 201610747160.1.
The flow sensor described in the chinese patent ZL201610747160.1 adopts the principle design of venturi tube, including the base member, be equipped with the perforating hole that can blow and high pressure get pressure mouth, low pressure get pressure mouth on the base member, high pressure get pressure mouth, low pressure get pressure mouth respectively with the perforating hole intercommunication, the diameter in the middle of the perforating hole is less than the diameter at both ends, and the little one section of diameter is the larynx section in the middle of the perforating hole, and one section that the air at perforating hole both ends was insufflated is the entrance section, high pressure get pressure mouth and entrance section and be linked together, low pressure get pressure mouth and larynx section intercommunication. The flow sensor calculates and analyzes the proper change gradient of the diameter difference by utilizing the fixed diameter difference of different hole sections of the through hole, and ensures that the pressure difference in a laminar flow state can be obtained between the high-pressure taking port and the low-pressure taking port, so that the flow sensor has higher detection sensitivity and accuracy. The diameter of the middle of the through hole is smaller than the diameters of the two ends, so the diameter of the through hole determines the ventilation resistance of the flow sensor, and the excessive resistance has certain influence on the flow peak value of the lung function detection. Meanwhile, the through hole in the form has higher requirements on the processing technology and has certain processing difficulty. In the use process, the base body is connected with the lung function instrument in a clamping mode through the clamping column. When the base body is clamped on the pulmonary function instrument, the high-pressure taking port and the low-pressure taking port are just positioned under the base body, and the lowest position of the base body is positioned under the base body. During the test, the tester breathes out a gas carrying a large amount of moisture and mouth water. Under certain environmental conditions, the water vapor forms condensed water on the inner wall of the circular through hole of the substrate, and the condensed water flows to the lowest position of the substrate along the pipe wall. And the high-pressure taking port and the low-pressure taking port are just positioned at the lowest position of the base body, and condensed water or tap water flowing down can be gathered at the high-pressure taking port and the low-pressure taking port. Under the condition that the high-pressure taking port and the low-pressure taking port are not large in diameter, the pressure taking port is easily blocked by water, so that the test cannot be smoothly carried out.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a flow sensor for detecting lung function, which comprises a base body, wherein a through hole, a first pressure taking port and a second pressure taking port are arranged on the base body, the first pressure taking port and the second pressure taking port are respectively communicated with the through hole, the inner diameters of the through hole are consistent, a throttle plate is arranged in the through hole, and a small hole is formed in the throttle plate.
In a preferred embodiment, the orifice is located in the center of the throttle plate.
More specifically, the diameter of the through hole 2 is 27-30 mm, the diameter of the small hole 51 on the throttle plate is 13-15 mm, and the thickness of the throttle plate is 1-5 mm.
Furthermore, the perforated throttle plate divides the through hole into a first vent pipe and a second vent pipe, the first pressure taking port is arranged in the first vent pipe section, and the second pressure taking port is arranged in the second vent pipe section.
Furthermore, the positions of the first pressure measuring port and the second pressure measuring port on the vent pipe are not arranged on the longitudinal section of the ventilation direction of the base body when the flow sensor is in the use state.
Furthermore, the flow sensor also comprises a clamping column, and when the clamping column is vertically placed, the pressure taking port is not arranged on the central connecting line of the two clamping columns.
Furthermore, the device also comprises a mouthpiece, wherein the mouthpiece comprises a meshing end and a connecting end, the pipe diameter of the connecting end is matched with the connecting part of the base body, and the two can be mutually spliced or sleeved together in an airtight and sealed manner.
Furthermore, a boss is arranged on the mouthpiece connecting end, and a notch matched with the boss in shape is arranged on the base body connecting part.
Preferably, a clamping device matched with the base body is further arranged on the outer side of the pipe wall of the connecting end of the mouthpiece.
Furthermore, a groove is arranged on the outer side of the pipe wall of the connecting end, and a bulge matched with the groove is arranged on the inner wall of the pipe orifice of the connecting part of the substrate.
The invention has the beneficial effects that: the flow sensor adjusts the position of the pressure taking port, effectively avoids the condition that the pressure taking port is blocked by oral water or condensed water in the test process, has small ventilation resistance in the flow sensor, and has small influence on the flow peak value in the lung function detection. Meanwhile, the processing difficulty is reduced, and the product percent of pass is greatly improved.
Drawings
FIG. 1 is a schematic view of the external structure of the flow sensor of the present invention.
FIG. 2 is a schematic diagram of a flow sensor showing the relationship between the latch and the pressure tap.
Fig. 3 is a sectional view in the direction of fig. 1A-a.
FIG. 4 is a schematic view of a flow sensor showing the construction of a throttle plate according to the present invention.
FIG. 5 is a schematic view of a configuration in which the mouthpiece is not inserted into the flow sensor base.
Fig. 6 is a schematic view of the mouthpiece inserted into the flow sensor base.
Fig. 7 is a schematic view of the mouthpiece in preparation for removal from the flow sensor base.
Detailed Description
As shown in fig. 1 to 4, the flow sensor for detecting lung function is connected with a lung function instrument host to form a lung function testing device, or the flow sensor is connected with a testing handle. The flow sensor comprises a base body 1, wherein a through hole 2 capable of blowing air, a first pressure taking port 3 and a second pressure taking port 4 are formed in the base body 1, and the first pressure taking port and the second pressure taking port are respectively communicated with the through hole. The inner diameter of the through-hole 2 is kept uniform, i.e. the diameter in the middle of the through-hole is the same as the diameter at both ends. A throttle plate 5 is provided in the through hole, and a small hole 51 is opened in the throttle plate 5. The perforated throttle plate 5 divides the through hole into two parts, namely a first vent pipe 21 and a second vent pipe 22, and the first vent pipe 21 and the second vent pipe 22 are communicated through a small hole 51. In a preferred embodiment, the orifice 51 is located in the center of the throttle plate 5. In a more specific scheme, the diameter of the through hole 2 is 27-30 mm, the diameter of the small hole 51 on the throttle plate is 13-15 mm, and the thickness of the throttle plate is 1-5 mm.
The first pressure taking port 3 is arranged at the section of the first vent pipe 21, and the second pressure taking port 4 is arranged at the section of the second vent pipe 22. One opening of the pressure taking port faces to the inside of the vent pipe, and the other opening of the pressure taking port is connected with the differential pressure sensor. In addition, in order to avoid the situation that the pressure taking port is blocked by the tap water or the condensed water in the test process, the positions of the first pressure taking port and the second pressure taking port on the vent pipe are not arranged on the longitudinal section of the ventilation direction of the base body when the flow sensor is in the use state. For example, when the flow sensor is connected to the lung function instrument main unit or the test handle and then tested, if the flow sensor is in the horizontal test position, the pressure-taking port is provided outside the longitudinal section of the through hole, as shown in fig. 3. For another example, as shown in fig. 2, the pressure-extracting port is not provided on the center line of the two chucking posts 6. When the clamp column is vertically inserted into the lung function instrument host or the test handle, the pressure taking port is not positioned on the through hole and the longitudinal section of the clamp column.
The flow sensor shown in fig. 5 to 7 may further include a mouthpiece 8, which may be fixedly connected to the base of the sensor and detachably connected to the flow sensor. The tester holds the mouthpiece to blow or suck air into the through hole of the base body. In one embodiment, the base body further comprises a connecting portion 7 that mates with the mouthpiece. The mouthpiece 8 comprises a snap-in end 81 and a connecting end 82, the pipe diameter of which is adapted to the base body connecting part 7, which can be plugged or sleeved together in an air-tight manner.
In a further design scheme, a boss 83 is arranged on the mouthpiece connecting end 82, and a notch 71 matched with the boss 83 in shape is arranged on the base body connecting part 7. When the test fixture is installed, the convex part of the boss 83 is aligned with the notch 71 of the base body connecting part 7, and then the connecting end of the mouthpiece is inserted into the base body through hole, so that the correct test position of the newly installed mouthpiece can be ensured every time. In an advantageous design, the projection 83 is tongue-shaped and the gap 71 is arc-shaped, the arc of which is the same as the arc of the tongue-shaped projection. When in installation, the tongue-shaped lug boss used as an installation indicating element is aligned to the arc-shaped opening, and the insertion of the mouthpiece and the base body is completed. By the design, the mouthpiece can be installed at a correct test position, and the arc-shaped boss and the arc-shaped opening with extremely strong line feeling can be connected to make the connection of the mouthpiece more attractive. In embodiments where the mouth of the mouthpiece 8 is an elliptical opening. When the mouthpiece is arranged on the base body, namely when the lug boss is inserted into the notch, the long axis direction of the oval opening is ensured to be parallel to the long axis direction of the human mouth.
In a preferred embodiment, but with the mouthpiece attached to the base, the lower surface 831 of the forward end of the boss 83 abuts the upper surface 711 of the wall of the slit. When the mouthpiece is to be detached from the base body, the abutting part becomes a stress point, and the mouthpiece can be detached from the base body only by slightly bending the mouthpiece upwards along the opening direction. This solution does not require much effort to remove the mouthpiece from the base, as compared to removing the mouthpiece along the longitudinal axis of the base.
In order to avoid the loose between the mouthpiece and the base body which are installed together, the outer side of the pipe wall of the connecting end 82 of the mouthpiece is also provided with a clamping device matched with the base body. In the embodiment shown in fig. 5, the outer side of the tube wall of the connecting end 82 is provided with a groove 84, and the inner wall of the tube opening of the base connecting part 7 is provided with a protrusion 74 matched with the groove. The disposable mouthpiece and the base body connecting part are made of medical plastics, and when the mouthpiece is inserted into the inner wall of the base body connecting part, the protrusion is extruded into the groove and clamped in the groove, so that the situation that the inserting connection of the mouthpiece and the base body is loosened during inspection is further avoided. Of course the projection and recess locations may be interchanged.
The verification experiment carried out on the flow sensor disclosed by the invention shows that the condition that the pressure taking port is blocked by saliva or condensed water in the test process can be effectively avoided, the ventilation resistance in the flow sensor is small, and the influence on the flow peak value in the lung function detection process is small. Meanwhile, the processing difficulty is reduced, and the product percent of pass is greatly improved.
Claims (10)
1. A flow sensor for pulmonary function detects, including the base member, be equipped with the perforating hole on the base member and first get pressure mouth, second and get pressure mouth, first get pressure mouth and second and get pressure mouth and communicate with the perforating hole respectively, its characterized in that, the inside diameter of perforating hole is unanimous, is provided with the throttle plate in the perforating hole, has seted up the aperture on this throttle plate.
2. The flow sensor of claim 1, wherein the orifice is located in a central location of the throttle plate.
3. The flow sensor according to claim 1, wherein the diameter of the through hole 2 is 27 to 30mm, the diameter of the small hole 51 in the throttle plate is 13 to 15mm, and the thickness of the throttle plate is 1 to 5 mm.
4. The flow sensor according to claim 1, wherein the perforated restrictor plate divides the through-hole into a first vent pipe and a second vent pipe, the first pressure-taking port is provided in the first vent pipe section, and the second pressure-taking port is provided in the second vent pipe section.
5. A flow sensor according to any one of claims 1 to 4, wherein the first and second pressure taps are not located on the vent conduit at a position which is transverse to the direction of venting of the substrate when the flow sensor is in use.
6. The flow sensor according to one of claims 1 to 4, further comprising a latch, wherein the pressure tap is not provided on a center line connecting two latches when the latches are vertically placed.
7. A flow sensor according to any one of claims 1 to 4, further comprising a mouthpiece, the mouthpiece comprising a snap-in end and a connecting end, the connecting end having a tubular diameter adapted to fit the base connecting portion, the two being capable of being plugged or sleeved together in an airtight manner.
8. The flow sensor according to claim 7 wherein the mouthpiece connecting end has a boss and the base connecting portion has a notch shaped to match the boss.
9. A flow sensor according to claim 7, wherein the outer side of the tubular wall of the coupling end of the mouthpiece is further provided with a clamping means for engaging the base body.
10. The flow sensor according to claim 9, wherein the outer side of the tube wall of the connecting end is provided with a groove, and the inner wall of the tube opening of the connecting part of the base body is provided with a protrusion matched with the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910929756.7A CN112568893A (en) | 2019-09-27 | 2019-09-27 | Flow sensor for pulmonary function detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910929756.7A CN112568893A (en) | 2019-09-27 | 2019-09-27 | Flow sensor for pulmonary function detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112568893A true CN112568893A (en) | 2021-03-30 |
Family
ID=75110303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910929756.7A Pending CN112568893A (en) | 2019-09-27 | 2019-09-27 | Flow sensor for pulmonary function detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112568893A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547381A (en) * | 2015-12-25 | 2016-05-04 | 潍柴动力股份有限公司 | Device for measuring air intake flow of engine |
| CN106108906A (en) * | 2016-08-29 | 2016-11-16 | 浙江亿联健医疗器械有限公司 | Flow transducer for lung function |
| CN106813758A (en) * | 2017-02-22 | 2017-06-09 | 苏州市计量测试研究所 | A kind of flow measurement device for borne bacteria sampler |
| CN211934056U (en) * | 2019-09-27 | 2020-11-17 | 浙江亿联康医疗科技有限公司 | Flow sensor for pulmonary function detection |
-
2019
- 2019-09-27 CN CN201910929756.7A patent/CN112568893A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547381A (en) * | 2015-12-25 | 2016-05-04 | 潍柴动力股份有限公司 | Device for measuring air intake flow of engine |
| CN106108906A (en) * | 2016-08-29 | 2016-11-16 | 浙江亿联健医疗器械有限公司 | Flow transducer for lung function |
| CN106813758A (en) * | 2017-02-22 | 2017-06-09 | 苏州市计量测试研究所 | A kind of flow measurement device for borne bacteria sampler |
| CN211934056U (en) * | 2019-09-27 | 2020-11-17 | 浙江亿联康医疗科技有限公司 | Flow sensor for pulmonary function detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101204328B (en) | Respiratory monitoring with cannula receiving respiratory airflows | |
| US5676132A (en) | Pulmonary interface system | |
| US8888711B2 (en) | Flow sensor | |
| US7640932B2 (en) | Nasal cannula for acquiring breathing information | |
| US4815459A (en) | Endotracheal tube connector | |
| US8286504B2 (en) | Arrangement for improving accuracy of pressure measurement and flow sensor | |
| JP2008513059A (en) | Gastric tube placement indicator | |
| RU2012108203A (en) | ADVANCED SPIROMETER AND USED APPLICABLE TO IT WAYS | |
| CN211934056U (en) | Flow sensor for pulmonary function detection | |
| CN107374635B (en) | Pulmonary function instrument capable of preventing cross infection | |
| EP2897527A1 (en) | Low dead space liquid trap | |
| CN107242874B (en) | Flow sensor for measuring lung function, lung function tester and application | |
| WO2018041068A1 (en) | Flow sensor for pulmonary function testing, spirometer and testing method and application thereof | |
| CN112568893A (en) | Flow sensor for pulmonary function detection | |
| CN107049317A (en) | The method of expiration or air-breathing is judged in lasting tidal air detection process | |
| CN210543165U (en) | Air blowing trainer with tidal volume detection function | |
| CN207837551U (en) | The flow sensor and spirometer of lung function tests | |
| Holst et al. | Errors in tracheal pressure recording in patients with a tracheostomy tube—a model study | |
| WO2018041073A1 (en) | Flow sensor, method and application for cross-infection prevention | |
| TWI586329B (en) | Disposable respiratory flow apparatus | |
| KR100263018B1 (en) | Spirometer | |
| CN221750448U (en) | Disposable mouthpiece capable of detecting respiratory flow | |
| CN220495380U (en) | Nasopharynx breather pipe | |
| JP2021035441A (en) | Respiratory flow rate measurement apparatus | |
| US20130345590A1 (en) | Apparatus for quantifying expiratory and inspiratory airflow |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |