Portable lung function detector

Abstract

The invention discloses a portable lung function detector which comprises a blowing nozzle, a thermosensitive sensor, a circuit board, a liquid crystal display screen, a battery box, a front box coverand a rear box cover. The front box cover and the rear box cover are fixedly connected through a fastener to form a cavity, the thermosensitive sensor is fixedly connected with the circuit board, thecircuit board is fixedly connected with the liquid crystal display screen, the battery box is positioned at the lower end of the circuit board, an opening of the battery box is downward, a control module and a display module are integrated on the circuit board, the control module is used for calculating data of the thermosensitive sensor, the display module is used for displaying the data on theliquid crystal display screen, a loop is arranged at the upper end of the thermosensitive sensor, the blowing nozzle is in sleeve connection with the loop and positioned at the upper end of the cavity, a rectangular opening for displaying the content of the liquid crystal display screen is formed in the end face of the front box cover, and a switch for opening and closing the front box cover and the rear box cover is arranged at the lower end of the rectangular opening. The thermosensitive sensor is used for measuring parameters such as breathing flow speed and flow rate, and the portable lungfunction detector has the advantages of portability, compactness, safety, sanitation, long endurance time and the like.

Description

technical field [0001] The invention relates to the technical field of medical testing equipment, in particular to a portable lung function testing instrument. Background technique [0002] Chronic obstructive pulmonary disease, or COPD for short, is a common, preventable and treatable disease characterized by persistent respiratory symptoms and airflow Caused by abnormal alveoli; the awareness rate of COPD in my country is low, patients have insufficient awareness of the disease, and poor self-management; the prevalence of COPD in my country accounts for 9.9-13.7% of people over 40 years old, due to the large number of patients, The social and economic burden is heavy, and it has become an important chronic respiratory disease that seriously endangers people's health. According to the third national death retrospective sampling survey report: the mortality rate of chronic respiratory diseases in men is higher than that of women, and in rural areas is significantly higher tha...

AI Technical Summary

Problems solved by technology

[0004] Advantages of the first generation: low price, relatively accurate measurement; Disadvantages: large volume, measuring volume through liquid, inconvenient to carry, unable to digitize, high pressure, some patients with lung function deficiency may not be able to test the accurate lung function status

[0005] Disadvantages of the second-generation impeller or turbine type: Due to the existence of factors such as the motion inertia of the impeller and the frictional moment between the shaft and the bearing, the accuracy of the sensor will be affected. Internal calibration, unable to resolve

[0006] The advantages of the third-generation ultrasonic method are: non-contact measurement, suitable for the measurement of stable air flow; disadvantages: the measurement of changing air flow is not accurate, altitude and temperature have a great influence on the gas flow rate, which needs to be compensated by complex calculations, low flow rate gas The linear response is slightly poor during measurement; the disadvantage of the pressure difference type: the heater on the flowmeter can heat the capillary net to avoid the condensation and deposition of the exhaled saturated water vapor on the sieve-shaped separation net, blocking the mesh, and the sensor is mostly discarded at one time, costing Expensive, slightly less linear response at low flow rates

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