Pulmonary ventilation function detection method, equipment and medium based on flow-volume loop diagram

Abstract

The invention relates to a method, device and medium for detecting pulmonary ventilation function based on a flow-volume loop diagram. The detection method includes the following steps: acquiring an electrical impedance signal of an object to be measured; and performing amplitude processing on the electrical impedance signal , obtain the thoracic impedance amplitude signal sequence reflecting the ventilation status of the four regions; fuse the thoracic impedance amplitude signal sequence of the four regions to obtain the thoracic impedance characteristic value sequence; transform the thoracic impedance characteristic value sequence into a lung Volume series, and perform digital differential processing on the lung volume series to obtain the lung ventilation flow series, generate the total flow-volume loop diagram and the flow-volume loop diagram of each area; obtain the total flow-volume loop diagram based on the flow-volume loop diagram Pulmonary ventilation function and test results of pulmonary ventilation function in each area. Compared with the prior art, the present invention has the advantages of simple and easy implementation of the measurement process, no risk of cross-infection, accuracy and reliability, popularization and application, and the like.

Description

technical field [0001] The invention relates to a medical detection method, in particular to a method, equipment and medium for detecting pulmonary ventilation function based on a flow-volume loop diagram. Background technique [0002] Chronic Obstructive Pulmonary Disease (COPD) is a common chronic respiratory disease and has become a global public health problem. Currently, lung function tests using spirometry are the gold standard for the diagnosis of COPD, which has important guiding significance for early detection of lung and airway lesions, assessment of disease severity and prognosis. In pulmonary function tests, the diagnostic criteria for COPD is that after inhalation of bronchodilators, if the one-second rate, that is, forced expiratory volume in the first second (FEV1) / forced vital capacity (FVC), is less than 70%, and FEV1 accounts for A percentage of predicted <80% indicates airflow limitation. However, the existing spirometer has certain limitations in de...

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Problems solved by technology

However, the existing spirometer has certain limitations in detecting lung function. On the one hand, it can only detect changes in lung function but cannot identify whether the function of the left lung or the right lung has declined, let alone identify whether the function of the upper lung or the lower lung has decreased; On the one hand, in practical applications, the lung function instrument needs to exhale and inhale through the detection tube during the detection process. Although there are filters, the possibility of cross-infection cannot be completely ruled out.

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