Pulmonary Ventilation Heterogeneity Determined by EIT During PFT in Subjects With Normal One-second Rates
Trial Parameters
Brief Summary
To evaluate the demographic characteristics of normal one-second rates population in patients with pulmonary function tests recommended by outpatient physicians. To investigate whether EIT can identify spatial and temporal heterogeneity of lung ventilation in individuals with normal one-second rates during pulmonary function testing. To investigate the distribution patterns of lung ventilation in individuals with normal one-second rates using this technique, and provide references and evidence for early screening, diagnosis, treatment monitoring, and prognostic evaluation.
Eligibility Criteria
Inclusion Criteria: Age ≥18 years old. Patients who need to complete lung function tests assessed by outpatient physicians. Patients willing to participate in the study and sign an informed consent form. Exclusion Criteria: Patients with FEV1/FVC less than 0.7 after a bronchiectasis test. Patients with a history of lung diseases other than COPD, previous lung surgery, or radiation therapy. Patients who cannot be evaluated for EIT or who interfere with EIT results, such as implanted pacemakers/cardioverters. Patients who cannot complete EIT or may interfere with EIT results, such as those with implanted pacemakers/defibrillators. Patients who cannot complete lung function tests, such as myocardial infarction or shock in the past 3 months; severe heart failure or angina in the past 4 weeks，uncontrolled hypertension (systolic \>200mmHg, diastolic \>100mmHg)，severe hyperthyroidism etc. Vulnerable populations, including patients with mental illnesses, cognitive impairments, critically ill p