High-performance lung function detecting system and method based on thoracic impedance measurement

Abstract

The invention relates to a high-performance lung function detecting system and method based on thoracic impedance measurement. The high-performance lung function detecting system comprises a microcontroller, an upper computer, an exciting circuit, a signal conditioning and data collection circuit, an electrode buffer unit and a special electrode array, wherein the exciting circuit generates an exciting current under control of the microcontroller, and the exciting current is obtained by converting a differential voltage signal and acts on the special electrode array through the electrode buffer unit; the signal conditioning and data collection circuit collects an exciting current signal and a response voltage signal through the electrode buffer unit; the microcontroller demodulates the exciting current signal and the response voltage signal, calculates the amplitude and phase of thoracic impedance and uploads the amplitude and phase of the thoracic impedance to the upper computer; andthe upper computer obtains the assessment result of lung functions of a detected object according to the amplitude and phase of the thoracic impedance. Compared with the prior art, the high-performance lung function detecting system and method have the advantages of easy implementation, low system cost, high detection sensitivity, fast and convenient measurement and the like, and the detecting experience of a doctor and a patient can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of clinical pulmonary function testing, in particular to a high-performance pulmonary function testing system and method based on thoracic impedance measurement. Background technique [0002] COPD is a widespread chronic disease with high mortality. Early detection and early treatment are very important for the control of COPD. Pulmonary function tests performed clinically using airflow spirometers are the gold standard for the diagnosis of COPD. During the test, the subject needs to breathe calmly for 4-5 times, then continue to breathe repeatedly for 12 seconds or 15 seconds at the fastest breathing speed and maximum breathing range, and the number of breaths is required to reach 10-15 times, and then repeat after 10 minutes of rest. The examination process can be extremely physically taxing for patients with common respiratory diseases such as chronic obstructive pulmonary disease, bronchitis and pneumo...

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Problems solved by technology

The examination process can be extremely physically taxing for patients with common respiratory diseases such as chronic obstructive pulmonary disease, bronc...

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