1.What is pulmonary function test?
Pulmonary function test is an examination technique that uses specialized medical equipment to detect the airflow rate and airflow generated by the human airways during breathing to understand whether the respiratory function is normal. Pulmonary function test has more items, mainly including: ventilation function, ventilation function and airway reactivity test.
2.Why should we do pulmonary function test.
Pulmonary function test can understand the physiological status of the respiratory system, clarify the mechanism and type of pulmonary dysfunction to determine the degree of its pathology, estimate the functional reserve of the lung, and provide a basis for dynamic observation of the evolution of the disease process, pre-surgery or health examination. It is mainly used for the following purposes.
(1) Health screening, assessment of labor intensity and tolerance.
(2) Early detection of pulmonary and respiratory lesions.
(3) Identify the cause of dyspnea and determine the site of airway obstruction.
(4) To assess the severity of pulmonary disease.
(5) To assess surgical tolerance and the likelihood of postoperative complications.
(6) Monitoring of critically ill patients, etc.
3.What are the characteristics of pulmonary function tests?
(1) Pulmonary function test is a physical examination method, no damage to the body, no pain and discomfort.
(2) Pulmonary function test has the advantages of high sensitivity, convenient repeat testing and easy acceptance by patients.
(3) Compared with X-ray chest X-ray, CT and other tests, pulmonary function test focuses more on understanding the functional changes of the lungs, an important means of examination for respiratory diseases.
4.The following situations require pulmonary function tests.
(1) Recurrent cough or with wheezing.
(2) Cough lasting more than 2-3 weeks and ineffective antibiotic treatment.
(3) Repeated “colds” that progress to the lower respiratory tract and last more than 10 days.
(4) Evaluation of the condition of the asthmatic patient.
(5) acute attacks of choking cough, hoarseness, dyspnea.
(6) Early differentiation of acute bronchitis, pneumonia and asthma.
(7) Other respiratory diseases.
5.The main manifestations of respiratory system diseases in pulmonary function tests are.
(1) obstructive lesions: refers to the change of airflow obstruction due to various factors causing narrowing of the airway, of which asthma is the most obvious.
(2) restrictive lesions: changes in pulmonary ventilation due to restriction of respiratory movements, such as emphysema, pleurisy and fluid pneumothorax, all have different degrees of reduced pulmonary ventilation.
(3) Mixed lesions: refers to both obstructive and restrictive lesions, such as chronic obstructive pulmonary disease and advanced asthma, pneumoconiosis, pediatric bronchopneumonia, etc.