CN203539351U - Off-line expiration sampling tube - Google Patents
Off-line expiration sampling tube Download PDFInfo
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- CN203539351U CN203539351U CN201320601931.8U CN201320601931U CN203539351U CN 203539351 U CN203539351 U CN 203539351U CN 201320601931 U CN201320601931 U CN 201320601931U CN 203539351 U CN203539351 U CN 203539351U
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Abstract
The utility model relates to an off-line expiration sampling tube, which comprises a tube body (1), wherein the tube body is at least provided with a hole for accommodating an expiration filtering mouthpiece (6) and a main air channel (7) penetrating through the whole tube body, and comprises an emptying air channel (9) and a sampling air channel (10); the middle of the tube body (1) is provided with a dividing piston (4) and a spring (8) which can be connected with the main air channel (7) and the emptying air channel (9) or the sampling air channel (10); the middle of the tube body (1) is provided with a pressure gage (2) connected to the main air channel (7); a resistance control valve (3) is arranged between the pressure gage (2) and the dividing piston (4); the tail end of the sampling air channel (10) can be connected with a sampling air bag (5).
Description
Technical field
This utility model relates to a kind of off-line expiration sampling tube, especially for the expiration sampling apparatus of characteristics of contaminated respiratory droplets nitric oxide (eNO) offline inspection.
Background technology
Off-line Sampling techniques have been widely used in characteristics of contaminated respiratory droplets gas detection field.Compared with online measuring technique, offline inspection technical advantage is: (1) can (comprise ward, outpatient service, workshop, school etc.) in the place away from detecting instrument and collect sample; (2) impact in not examined instrument response time; (3) can carry out many people sampling simultaneously, improve detecting instrument service efficiency.
Consistent for off-line and on-line measurement result are approached, sampling apparatus must have following 4 functions: (one), in order to make soft palate in exhalation process keep closing, device need to guarantee that oral cavity has the pressure of 5 cm H2O at least; (2) can indicate flow, so that expiration person controls flow; (3) can control and get rid of dead space gas; (4) can carry out variable-flow test.
Existing published off-line Sampling techniques have all met the first and second points easily, and thirdly every technology has all adopted various method, but the problem miscellaneous that they also exist, row are if American Thoracic Society 2005 is at ATS, the nitric oxide production off-line Sampling techniques of a kind of detection in ERS eNO determination techniques standard guide, have just been recommended, it is to allow patient at the outer first emptying dead space gas of device, then collect and to test gas when exhaling, the problem of bringing is like this exactly the process of feeling suffocated in exhalation process, has had a strong impact on the accuracy of test value; In the disclosed technology of GE Water & Process Technologies company, adopt Rule valve to control in addition emptying, but the shortcoming of Rule valve control is to carry out instantaneous switching, in handoff procedure, patient has and feels suffocated, and to test result, can impact; This patent has been used the method for spring shunting piston, and handoff procedure is the instantaneous process of feeling suffocated that do not have.
In current all disclosed off-line Sampling techniques, all do not reach the 4th point: can carry out variable-flow test; Variable-flow test is the method for human body diverse location gas, row are as carried out eNO analysis to alveolar gas, just need to get rid of the impact of the NO that respiratory tract produces, need to be by repeatedly measure eNO under different exhalation flow rate, then by formula, calculate the NO value of alveolar gas.The resistance that different flow lower devices produces can be different, same device down-off increasing is twice resistance and will increases four times, can cause patient to exhale, in order to carry out variable-flow test set, just must can regulate resistance, the off-line expiration sampling tube of this patent is equipped with resistance control valve and has solved this problem.
Summary of the invention
The technical problems to be solved in the utility model is to provide one and is arranged on and relates to expiration off-line when sampling and meet on the one hand soft palate in exhalation process and keep closing, flow can be indicated so that expiration person controls the requirement of flow simultaneously, can control again on the other hand and get rid of dead space gas, the third aspect can also be carried out the collection of different flow gas.
General expiration sampling tube is by body, exhaling hole, emptying gas circuit and sampling gas circuit group, and in order to address the above problem, off-line expiration sampling tube of the present utility model has been installed Pressure gauge (2) on body (1), draught control valve (3), shunting piston (4) and spring (8).Wherein said draught control valve (3) is placed between Pressure gauge (2) and shunting piston (4).
This utility model is emptying by pressing with the control of bouncing of shunting piston (4), and the benefit of bringing like this has: 1. and handled easily, can switch more efficiently; 2. can free hold emptying time, can control voluntarily any one section of gas of emptying exhalation process.
Off-line expiration sampling tube of the present utility model can by regulate described draught control valve (3) by the overall resistance fine adjustment of device in 500ml/min ~ 25000ml/min range of flow to 3mmHg ~ 30mmHg.
Between Pressure gauge (2) on this utility model body (1) and shunting piston (4), there is a draught control valve (3), described draught control valve (3) is in diverse location lower time, demarcate the corresponding pressure limit of different flow, and record marks in the dial plate of Pressure gauge (2), during use, according to the indication of Pressure gauge (2), behind adjusting draught control valve (3) position, exhale and obtain corresponding flow by this device.
Exhaling hole (6) on this utility model body (1) is designed to install exhale and filters the shape of blow gun, and the aseptic human body mouth that can obtain being dried by this expiration filter tip is exhaled.
As the optimization of said structure, body (1) fore-end is designed to slender type, has so both facilitated patient to hold device, can preserve certain distance with Pressure gauge and facilitate patient to see the value on Pressure gauge while also making patient exhale, and can better control flow.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of off-line expiration sampling tube device of the present utility model.
The specific embodiment
What Fig. 1 showed is a kind of off-line expiration sampling tube, comprise a body (1), body at least needs to have can install to exhale and filters the hole (6) of blow gun and run through the main gas circuit road (7) of whole body and comprise an emptying gas circuit (9) and sample gas circuit (10).In the middle of body (1), there are a shunting piston (4) and spring (8) can be connected main gas circuit (7) and emptying gas circuit (9) or sampling gas circuit (10), body (1) middle part has individual Pressure gauge (2) to be connected to main gas circuit (7), between Pressure gauge (2) and shunting piston (4), have a draught control valve (3), sampling gas circuit (10) end can connect a sampling airbag (5).Example below illustrates embodiment of the present utility model and application.
Application Example
When off-line is exhaled sampling, first according to the flow of required acquisition, observe the indicated scope of Pressure gauge and the position of draught control valve (3), after regulating the position of draught control valve (3), start sampling, experimenter filters blow gun by the expiration being connected with body front end exhaling hole (6) and exhales, expiratory gas flow is controlled in the indicated scope of Pressure gauge (2), to shunt piston (4) presses downwards, the gas circuit of sampling (10) will block, emptying gas circuit (9) is opened, gas can be discharged from emptying gas circuit (9), when evacuation volume reaches 300mL, spring while unclamping (8) will make to shunt piston (4) and pop into position, at this moment emptying gas circuit (9) will block, sampling gas circuit (10) is opened, gas can be through then entering sampling airbag (5) from sampling gas circuit (10).
Claims (5)
1. an off-line expiration sampling tube, by body (1), exhaling hole (6), emptying gas circuit (9) and sampling gas circuit (10), formed, it is characterized in that: on this body (1), be connected with Pressure gauge (2), draught control valve (3), shunting piston (4) and spring (8); Described draught control valve (3) is placed between Pressure gauge (2) and shunting piston (4).
2. according to the off-line expiration sampling tube described in claims 1, it is characterized in that: by regulating described draught control valve (3) can realize in 500ml/min ~ 25000ml/min range of flow, by the overall resistance fine adjustment of this device to 3mmHg ~ 30mmHg.
3. according to the off-line expiration sampling tube described in claims 1, it is characterized in that: by regulating described shunting piston (4) and spring (8) that main gas circuit (7) is switched to emptying gas circuit (9) or sampling gas circuit (10).
4. according to the off-line expiration sampling tube described in claims 1, it is characterized in that: described exhaling hole (6) can be installed to exhale and filter blow gun, and the aseptic human body mouth that can obtain being dried by this expiration filter tip is exhaled.
5. according to the off-line expiration sampling tube described in claims 1, it is characterized in that: at described draught control valve (3), under diverse location, demarcate the corresponding pressure limit of different flow, and record marks in the dial plate of Pressure gauge (2); During use according to the indication of Pressure gauge (2), regulate draught control valve (3) thus position obtains corresponding flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320601931.8U CN203539351U (en) | 2013-09-27 | 2013-09-27 | Off-line expiration sampling tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320601931.8U CN203539351U (en) | 2013-09-27 | 2013-09-27 | Off-line expiration sampling tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203539351U true CN203539351U (en) | 2014-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320601931.8U Expired - Lifetime CN203539351U (en) | 2013-09-27 | 2013-09-27 | Off-line expiration sampling tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203539351U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391107A (en) * | 2014-11-28 | 2015-03-04 | 无锡市尚沃医疗电子股份有限公司 | Method for measuring nitric oxide in expired gas without need of controlling expiratory flow |
| CN105548533A (en) * | 2015-12-04 | 2016-05-04 | 无锡市尚沃医疗电子股份有限公司 | System for remote monitoring of exhaled hydrogen sampling and determination |
-
2013
- 2013-09-27 CN CN201320601931.8U patent/CN203539351U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391107A (en) * | 2014-11-28 | 2015-03-04 | 无锡市尚沃医疗电子股份有限公司 | Method for measuring nitric oxide in expired gas without need of controlling expiratory flow |
| CN104391107B (en) * | 2014-11-28 | 2016-03-02 | 无锡市尚沃医疗电子股份有限公司 | A kind of Exhaled nitric oxide measuring method not needing control expiratory gas flow |
| CN105548533A (en) * | 2015-12-04 | 2016-05-04 | 无锡市尚沃医疗电子股份有限公司 | System for remote monitoring of exhaled hydrogen sampling and determination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |