CN205163073U - PFT measuring apparatu - Google Patents
PFT measuring apparatu Download PDFInfo
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- CN205163073U CN205163073U CN201521019182.3U CN201521019182U CN205163073U CN 205163073 U CN205163073 U CN 205163073U CN 201521019182 U CN201521019182 U CN 201521019182U CN 205163073 U CN205163073 U CN 205163073U
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- inflator
- pulmonary function
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- measurement
- gas outlet
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Abstract
The utility model discloses a PFT measuring apparatu, including host computer body, measurement inflator, air inlet, gas outlet, baroceptor, liquid crystal display, shift knob and PFT measurement element, inlet set sets up at the other end of measuring the inflator in the one end of measuring the inflator, gas outlet, and atmospheric pressure sensor settings is in measuring the inflator, and the host computer body is connected in lower extreme one side of measuring the inflator, and liquid crystal display and shift knob imbed respectively and install on one's body the host computer, and PFT measurement element sets up in the host computer body, and PFT measurement element includes main control unit, real -time clock, power, buzzer and communication ware. The utility model discloses a PEF, FEV1 and FVC etc. And the undulant parameter the most relevant of asthma feelings are measured to differential pressure sensor's mode, accessible bluetooth, near field communication radio communication such as (NFC) technique and communications such as smart mobile phone, panel computer, can set up the relevant information by moving application, if measure the warning, measure early warning etc..
Description
Technical field
This utility model relates to a kind of measurement apparatus of pulmonary function, particularly relates to a kind of Pulmonary function instrument.
Background technology
Domestic about have 3,000 ten thousand asthmatic patients, only can realize effective control of asthma less than the patient of 5% at present.The state-owned patients with COPD more than 4,000 ten thousand on the other hand.Asthma and chronic obstructive pulmonary disease are all airway obstructive diseases.Peak flow velocity is called for short by continuous measurement patient expiration peak velocity (peakexpiratoryflow, PEF); One second FEF (Forcedexpiratoryvolumeinonesecond, FEV1) be called for short one second rate; Forced vital capacity (forcedvitalcapacity, FVC) can judge the state of an illness fluctuation that asthmatic patient is current, knows recent acute attack risk in time.Timely intervention can reduce patients acuity outbreak probability, and simultaneously long-term lung function monitoring also can allow the better assess patient state of an illness of doctor.
Lung function instrument is generally divided into following a few class:
1. differential: its principle is the change that air-flow causes air pressure, record barometer by pressure transducer and calculate gas velocity and change corresponding lung parameter into.
2. heat-sensitive type: its principle is that air-flow causes sensor temperature to change, and goes out gas flow rate and change corresponding lung parameter into by the change calculations of temperature.
3. volume type: its principle, for collecting all breaths, converses corresponding lung parameter by change in volume and the relation of time.
Utility model content
The purpose of this utility model: a kind of Pulmonary function instrument is provided, need two parameters measuring and family to measure features such as required precision are on the low side relative to hospital for asthma, patients with COPD, by pressure reduction mode measure several lung function parameter PEF under high flow rate FEV1 FVC.
To achieve these goals, the technical solution of the utility model is:
A kind of Pulmonary function instrument, comprises main machine body, measures inflator, air inlet, gas outlet, baroceptor, LCDs, shift knob and Pulmonary function assembly; Described measurement inflator is the cylinder-like structure of the hollow of both ends open, described air inlet is arranged on one end of described measurement inflator, described gas outlet is arranged on the other end of described measurement inflator, and the bore of described gas outlet is less than the bore of described air inlet; Described baroceptor is arranged in described measurement inflator, is positioned at the inner side of described gas outlet; Described main machine body is connected to the side, lower end of described measurement inflator, and described LCDs and shift knob embed respectively and be arranged in described main machine body, and described shift knob is positioned at the below of described LCDs; Described Pulmonary function assembly is arranged in described main machine body, and described Pulmonary function assembly comprises master controller, real-time clock, power supply, buzzer and communicator; The outfan of described baroceptor, shift knob and power supply is connected with the input of described master controller respectively, described real-time clock and communicator are bi-directionally connected with described master controller respectively, described communicator is by the external intelligent terminal of wireless network, and the outfan of described master controller is connected with the input of described buzzer and LCDs respectively.
Above-mentioned Pulmonary function instrument, wherein, described power supply is lithium battery or model is the power supply of CH4054.
Above-mentioned Pulmonary function instrument, wherein, the model of described master controller is STM32F103.
Above-mentioned Pulmonary function instrument, wherein, described communicator is blue-tooth device or GPRS device.
Above-mentioned Pulmonary function instrument, wherein, the model of described blue-tooth device is CC254X, and the model of described GPRS device is SIM900A.
Above-mentioned Pulmonary function instrument, wherein, the model of described baroceptor is MP3V5004DP.
This utility model is measured PEF, FEV1 and FVC etc. and the asthma state of an illness by the mode of differential pressure pickup and to be fluctuated parameter the most relevant; By wireless communication technology and the communications such as smart mobile phone, panel computer such as bluetooth, near-field communications (NFC); Relevant information can be set by Mobile solution, remind as measured, measuring early warning etc.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of Pulmonary function instrument of this utility model.
Fig. 2 is the connection block diagram of the Pulmonary function assembly of a kind of Pulmonary function instrument of this utility model.
Fig. 3 is the flow chart of the measuring method of a kind of Pulmonary function instrument of this utility model.
The graph of a relation of air pressure p and time t when Fig. 4 is eupnea.
Fig. 5 is the graph of a relation of gas flow rate w and air pressure p in the measurement inflator of a kind of Pulmonary function instrument of this utility model.
Fig. 6 is the graph of a relation of a kind of Pulmonary function instrument of this utility model gas flow rate w and time t when measuring.
Detailed description of the invention
Embodiment of the present utility model is further illustrated below in conjunction with accompanying drawing.
Refer to shown in accompanying drawing 1 and accompanying drawing 2, a kind of Pulmonary function instrument, comprise main machine body 1, measure inflator 2, air inlet 3, gas outlet 4, baroceptor 5, LCDs 6, shift knob 7 and Pulmonary function assembly; Described measurement inflator 2 is the cylinder-like structure of the hollow of both ends open, described air inlet 3 is arranged on one end of described measurement inflator 2, described gas outlet 4 is arranged on the other end of described measurement inflator 2, and the bore of described gas outlet 4 is less than the bore of described air inlet 3; Described baroceptor 5 is arranged in described measurement inflator 2, is positioned at the inner side of described gas outlet 4; Described main machine body 1 is connected to the side, lower end of described measurement inflator 2, and described LCDs 6 and shift knob 7 embed respectively and be arranged in described main machine body 1, and described shift knob 7 is positioned at the below of described LCDs 6; Described Pulmonary function assembly is arranged in described main machine body 1, and described Pulmonary function assembly comprises master controller 8, real-time clock 9, power supply 10, buzzer 11 and communicator 12; The outfan of described baroceptor 5, shift knob 7 and power supply 10 is connected with the input of described master controller 8 respectively, described real-time clock 9 and communicator 12 are bi-directionally connected with described master controller 8 respectively, described communicator 12 is by the external intelligent terminal of wireless network, and the outfan of described master controller 8 is connected with the input of described buzzer 11 and LCDs 6 respectively.
Described power supply 10 is lithium battery or model is the power supply of CH4054.
The model of described baroceptor 5 is MP3V5004DP.
Described communicator 12 is blue-tooth device or GPRS device.
The model of described blue-tooth device is CC254X, and the model of described GPRS device is SIM900A.
The model of described master controller 8 is STM32F103.
LCDs 6 realizes the displays such as metrical information, and shift knob 7 can carry out switching on and shutting down operation to equipment.After during use, first starting shooting, then completing facing to air inlet 3 forced expiration, device measuring, carry out data display and wait is measured next time.
Principle of the present utility model is: upon exhalation, gas enters from air inlet 3 and measures inflator 2, because gas outlet 4 is less than air inlet 3, the air pressure measured in inflator 2 can be greater than external atmosphere pressure, baroceptor 5 can detect the air pressure measured in inflator 2 in real time, utilize pressure reduction to realize the measurement of gas flow rate, the integration simultaneously recycling flow velocity calculates gas volume.
Refer to shown in accompanying drawing 3, a kind of measuring method of Pulmonary function instrument, the method at least comprises the steps:
Step 1: initialize, to judge whether etc. to be measured, if so, then performs step 2, if not, then judges whether to carry out Bluetooth communication.
Step 2: start to exhale, makes gas pass through to measure inflator 2, causes the air pressure change measured in inflator 2.
Step 3: described baroceptor 5 detects the air pressure measured in inflator 2.
Step 4: air pressure change is converted to gas flow rate change by described Pulmonary function assembly, and calculates velocity integral.
Step 5: change velocity integral into gas volume.
Step 6: search Peak Flow Rate as peak flow velocity PEF.
Step 6: it is FEV1 that calculating starts expiration to volume during 1s.
Step 7: the volume calculated at the end of starting to exhale is FVC.
Step 8: result of calculation is shown by described LCDs 6 and stored.
Step 9: judge whether shutdown, if so, then shut down, if not, then return step 1.
Refer to shown in accompanying drawing 4, when normal exhalation measures pulmonary function, institute surveys the graph of a relation of air pressure p and time t: air pressure p variation tendency is that air pressure increases rapidly and reduces from exhaling.
In described step 1, also comprise as follows step by step:
Step 1.1: judge whether to carry out Bluetooth communication, if so, then performs step 1.2, if not, then returns step 1.
Step 1.2: carry out data communication by described communicator 12, data communication terminates rear execution step 9.
Refer to shown in accompanying drawing 4, in described step 3, the change of air pressure in described measurement inflator 2 and the pass of time are: air pressure p is larger, and gas flow rate w is higher: be denoted as: p=f (t).(1)
Refer to shown in accompanying drawing 5, in described step 4, during measurement, the pass of gas flow rate w and time t is w=f (p).(2)
Wherein, f (p) a
0p
n| a
1p
n-1| ... | a
np|w
0.(3)
In figure: s
1, s
2for hatched area, t
0for the time at the end of expiration.
In described step 6, peak flow velocity PEF is maximum flow velocity, FEV
1=S
1.(4)
FVC＝S
1+S
2(5)
Multinomial coefficient in formula (3) is straight to inflator, air inlet, gas outlet size are relevant.Simulate polynomial curve by proving flowmeter repetitive measurement in process, namely actually record a
0, a
1... a
n, w
0.
In formula (1) p=f (t), the baroceptor 5 of curve by Real-Time Monitoring in engineering records: the gas flow rate that in curve, maximum point is corresponding is exactly peak flow velocity PEF.
T
0for once exhaling the time terminated, record by master controller.
In described step 7, FVE1 can be calculated according to formula (3), formula (1), formula (6).
In described step 8, FVC can be calculated according to formula (3), formula (1), formula (7).
In sum, this utility model is measured PEF, FEV1 and FVC etc. and the asthma state of an illness by the mode of differential pressure pickup and to be fluctuated parameter the most relevant; By wireless communication technology and the communications such as smart mobile phone, panel computer such as bluetooth, near-field communications (NFC); Relevant information can be set by Mobile solution, remind as measured, measuring early warning etc.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure transformation utilizing this utility model description to do; or directly or indirectly use the technical field being attached to other Related products, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. a Pulmonary function instrument, is characterized in that: comprise main machine body, measure inflator, air inlet, gas outlet, baroceptor, LCDs, shift knob and Pulmonary function assembly; Described measurement inflator is the cylinder-like structure of the hollow of both ends open, described air inlet is arranged on one end of described measurement inflator, described gas outlet is arranged on the other end of described measurement inflator, and the bore of described gas outlet is less than the bore of described air inlet; Described baroceptor is arranged in described measurement inflator, is positioned at the inner side of described gas outlet; Described main machine body is connected to the side, lower end of described measurement inflator, and described LCDs and shift knob embed respectively and be arranged in described main machine body, and described shift knob is positioned at the below of described LCDs; Described Pulmonary function assembly is arranged in described main machine body, and described Pulmonary function assembly comprises master controller, real-time clock, power supply, buzzer and communicator; The outfan of described baroceptor, shift knob and power supply is connected with the input of described master controller respectively, described real-time clock and communicator are bi-directionally connected with described master controller respectively, described communicator is by the external intelligent terminal of wireless network, and the outfan of described master controller is connected with the input of described buzzer and LCDs respectively.
2. Pulmonary function instrument according to claim 1, is characterized in that: described power supply is lithium battery or model is the power supply of CH4054.
3. Pulmonary function instrument according to claim 1, is characterized in that: the model of described master controller is STM32F103.
4. Pulmonary function instrument according to claim 1, is characterized in that: described communicator is blue-tooth device or GPRS device.
5. Pulmonary function instrument according to claim 4, is characterized in that: the model of described blue-tooth device is CC254X, and the model of described GPRS device is SIM900A.
6. Pulmonary function instrument according to claim 1, is characterized in that: the model of described baroceptor is MP3V5004DP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521019182.3U CN205163073U (en) | 2015-12-09 | 2015-12-09 | PFT measuring apparatu |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521019182.3U CN205163073U (en) | 2015-12-09 | 2015-12-09 | PFT measuring apparatu |
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| Publication Number | Publication Date |
|---|---|
| CN205163073U true CN205163073U (en) | 2016-04-20 |
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| CN201521019182.3U Active CN205163073U (en) | 2015-12-09 | 2015-12-09 | PFT measuring apparatu |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105395201A (en) * | 2015-12-09 | 2016-03-16 | 上海朔茂网络科技有限公司 | Lung function measurement instrument and measurement method thereof |
-
2015
- 2015-12-09 CN CN201521019182.3U patent/CN205163073U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105395201A (en) * | 2015-12-09 | 2016-03-16 | 上海朔茂网络科技有限公司 | Lung function measurement instrument and measurement method thereof |
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