CN106333687A - Mainstream type human end-expiratory carbon dioxide concentration data collection and processing method - Google Patents
Mainstream type human end-expiratory carbon dioxide concentration data collection and processing method Download PDFInfo
- Publication number
- CN106333687A CN106333687A CN201610813769.4A CN201610813769A CN106333687A CN 106333687 A CN106333687 A CN 106333687A CN 201610813769 A CN201610813769 A CN 201610813769A CN 106333687 A CN106333687 A CN 106333687A
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- CN
- China
- Prior art keywords
- peak
- valley
- carbon dioxide
- voltage
- value
- 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
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 13
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 13
- 238000003672 processing method Methods 0.000 title claims abstract description 5
- 238000013480 data collection Methods 0.000 title abstract 2
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 11
- 230000002146 bilateral effect Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 23
- 230000007547 defect Effects 0.000 abstract 1
- 230000009191 jumping Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000012163 sequencing technique Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000001745 non-dispersive infrared spectroscopy Methods 0.000 description 1
- 230000005616 pyroelectricity Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0084—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters
- A61B5/0086—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters using infrared radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
Abstract
The invention relates to a mainstream type human end-expiratory carbon dioxide concentration data collection and processing method. According to the method, the conventional peak voltage is set to be V<H>; the valley voltage is set to be V<L>; for sampling data of a measuring channel in a period of time, when the peak voltage is in a threshold value range shown as the accompanying drawing, and the valley voltage is in a threshold value range shown as the accompanying drawing, sampling data is subjected to processing such as sequencing to select an extreme value point; the peak-peak values after the threshold value processing are arranged; the maximum value in the rest peak-peak values is used as a peak value sampling point; identically, the minimum value in the rest peak-valley values is taken to be used as a valley value sampling point. The method provided b the invention can overcome the defect that the current mainstream type carbon dioxide monitoring technology can be easily influenced by monitoring platform instability and peripheral electromagnetic interference, so that measuring data generates a jumping phenomenon.
Description
Technical field
The invention belongs to biomedical engineering field, it is related to a kind of people's End-tidal carbon dioxide concentration data acquisition method.
Background technology
In people's breathing in the medical monitorings such as clinic, gas concentration lwevel real-time monitoring is increasingly taken seriously, and especially exhales
Last carbon dioxide partial pressure becomes six basic vital signss.It is currently based on the End-tidal carbon dioxide concentration of NDIR principle
Monitoring system measurement can be divided mainly into two kinds: main stream-type monitoring measured directly and the side stream type by extracting breathing gas measurement
Monitoring.
Side stream type monitoring can make certainty of measurement higher extraction gas dehumidification, voltage stabilizing, but due to extracting prolonging of air-flow
When make display waveform have obvious distortion and equipment is comparatively laborious.And main stream-type monitoring can be divided into thermopile sensor to supervise mostly
Survey and pyroelectric sensor monitoring is although thermopile sensor monitoring can make circuit power stable, but due to respiratory air flow
Interference makes monitoring result error larger, and drifting problem also easily in waveform in long-time continuous monitoring.Pyroelectricity senses
Device occurs so that Monitoring Performance is greatly improved, and it has sensing wave-length coverage width, fast response time, and stable performance etc. is excellent
Point, but it is weak, the problems such as easily interference by circuit noise to there is also output signal.
Although the response of current main-stream formula carbon dioxide monitoring technology is fast, stable performance, main stream-type carbon dioxide monitors skill
When art is easily subject to platform unstable, saltus step in measurement data makes the gas concentration lwevel waveform value preset of display error.
The present invention to improve to measurement process data acquisition method, thus coming.
Content of the invention
It is an object of the invention to provide a kind of main stream-type people's End-tidal carbon dioxide that can reduce data jump and error
Concentration data acquiring and processing method.Technical scheme is as follows:
Current sensor adopts two pass bands scheme, and one of is Measurement channel, and another passage is reference channel,
In conjunction with the gathered data of two passages, provide a threshold range, if convention peak voltage is vh, valley point voltage is vl, for one
The sampled data of the Measurement channel in the section time, crest voltage existsIn threshold range, valley point voltage exists In threshold range, then sampled data is ranked up waiting to process selecting extreme point；Peak-to-peak value after arrangement threshold process,
Take in remaining peak-to-peak value group maximum as peak value sampling point；In the same manner, minima in remaining peak-to-valley value group is taken to sample as valley
Point.
The present invention can overcome current main-stream formula carbon dioxide monitoring technology, and easily monitored platform is unstable, electric around
Magnetic disturbance makes measurement data that hopping phenomenon occurs.
Brief description
The last co of Fig. 1 main stream-type people breathing2Monitoring modular.
Specific embodiment
The gas concentration lwevel monitoring method of the present invention is directed to main stream-type gas-monitoring and proposes, and the present invention is given below and fits
Monitoring system forms.
This main stream-type breathing carbon dioxide density monitoring system is made up of host computer and monitoring modular.Host computer is general meter
Calculation machine or monitor.As shown in figure 1,1 expression light source module, 2 expression sensor assemblies, 3 is transparent sheet glass to monitoring modular,
4 is gas passage.Wherein 3 and 4 composition pipeline adapter, can be directly installed on people exhaled gas official road.And light source module
The discrete both sides in pipeline adapter.Sensor assembly has two passages, is respectively mounted optical filter, wherein at each passway
co2The optical filter of passage is 4.26 μm, and the optical filter of reference channel is 3.95 μm. its operating process is:
(1) power-on self-test, in pipe full nitrogen, turns on the power, and checks whether two passage waveforms of sensor are normal.
Write down the peak value v of now sine wavehWith valley point voltage vl.
(2) when exporting stable modulation waveform, carry out breath test, now can produce ripple in two passages of sensor
Shape, this respiratory waveform cycle is equal to modulated signal, and amplitude is that modulated signal has been superimposed useful signal.Output voltage is waited to reach ripple
Peak vhOr trough point vlStart sampling.
(3) sample mode adopts Interval Sampling, that is, reach crest or trough in following tsContinuous sampling in/8 time periods
20 sampling points, i.e. peak point { vh1,vh2,...,vh19,vh20And valley point { vl1,vl2,...,vl19,vl20}.
(4) collect at peak valley 20 sampling points are carried out threshold value to compare, if it does not exist for peak point
In threshold range, then lose this sampled value；If for valley point, it does not exist in the same mannerIn threshold range, then lose this
Sampled value.
(5) peak-to-peak value after arrangement threshold process, takes in remaining peak-to-peak value group maximum as peak value sampling point, i.e. vhco2
=maxN=＜ 20{vh1,vh2,...vhn}；In the same manner, take in remaining peak-to-valley value group minima as valley sampled point, i.e. vlco2=
maxN=＜ 20{vl1,vl2,...vln}.
Claims (1)
1. a kind of main stream-type people's End-tidal carbon dioxide concentration data acquiring and processing method, comprising: current sensor adopts bilateral
Road measurement scheme, one of is Measurement channel, and another passage is reference channel, in conjunction with the gathered data of two passages, gives
Go out a threshold range, if convention peak voltage is vh, valley point voltage is vl, for the sampling of the Measurement channel in a period of time
Data, crest voltage existsIn threshold range, valley point voltage existsIn threshold range, then to hits
Select extreme point according to being ranked up waiting processing；Peak-to-peak value after arrangement threshold process, takes maximum in peak-to-peak value to adopt as peak value
Sampling point；In the same manner, take in peak-to-valley value minima as valley sampled point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610813769.4A CN106333687A (en) | 2016-09-10 | 2016-09-10 | Mainstream type human end-expiratory carbon dioxide concentration data collection and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610813769.4A CN106333687A (en) | 2016-09-10 | 2016-09-10 | Mainstream type human end-expiratory carbon dioxide concentration data collection and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106333687A true CN106333687A (en) | 2017-01-18 |
Family
ID=57822961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610813769.4A Pending CN106333687A (en) | 2016-09-10 | 2016-09-10 | Mainstream type human end-expiratory carbon dioxide concentration data collection and processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106333687A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101568806A (en) * | 2006-12-21 | 2009-10-28 | Ric投资有限责任公司 | Signal quality determination and signal correction system and methods |
| CN103705243A (en) * | 2013-12-16 | 2014-04-09 | 天津大学 | Method for synchronously monitoring concentration of carbon dioxide and breath flow amount in main flow mode |
-
2016
- 2016-09-10 CN CN201610813769.4A patent/CN106333687A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101568806A (en) * | 2006-12-21 | 2009-10-28 | Ric投资有限责任公司 | Signal quality determination and signal correction system and methods |
| CN103705243A (en) * | 2013-12-16 | 2014-04-09 | 天津大学 | Method for synchronously monitoring concentration of carbon dioxide and breath flow amount in main flow mode |
Non-Patent Citations (2)
| Title |
|---|
| JIACHEN YANG,ETC: "《Accurate and Stable continuous monitoring module by mainstream capnography》", 《JOURNAL OF CLINICAL MONITORING AND COMPUTING》 * |
| 王海涛: "《主流式呼吸二氧化碳浓度监测系统》", 《万方数据知识服务平台》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170118 |
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| RJ01 | Rejection of invention patent application after publication |