The functions of external respiration is a method for studying the ventilation function of the lungs using graphic registration when performing various respiratory maneuvers and further processing the data obtained on a computer.
Without a keyword
Functions of external respiration – a method for studying the ventilation function of the lungs using graphic registration when performing various respiratory maneuvers and further processing the data obtained on a computer.
The laboratory for the study of the function of external respiration in the department of functional diagnostics allows the following methods:
- Spirometry
- Pneumotachometry
- Examination of inspiratory and expiratory effort
- Examination of lung volumes
- Study of the diffusion capacity of the lungs
- Tests with bronchodilators
The research makes it possible:
- determine the cause of shortness of breath and the degree of respiratory disorders,
- choose a treatment and evaluate its effectiveness,
- identify a decrease in the ventilation capacity of the lungs, establish its type, nature and severity,
- assess the reversibility of changes in the use of drugs (bronchodilators),
- to trace the dynamics of changes in the state of the broncho-pulmonary tree in the course of the development of the disease and evaluate the result of treatment.
The study of the function of external respiration is used for detection of diseases that occur with a violation of bronchial conduction, a decrease in the properties of elasticity of the lung tissue, differential diagnosis of allergic and non-allergic lung diseases.
Preparation for the study of the function of external respiration
The study is best done in the morning, 1 hour after a meal (light breakfast), or on an empty stomach.
You can not drink strong tea, coffee, cocoa before the study – they have a bronchodilator effect. On this day, do not smoke until the study.
It is necessary to stop some drugs:
- taking medications (inhalers) with adreno- and cholinergic action is stopped 6-8 hours before the study,
- theophylline groups in 24 hours.
Cancellation of drugs must be agreed with the attending physician!
Before the study, it is necessary to limit nervous and physical activity, physiotherapy, smoking are prohibited.
To study the diffusion capacity of the lungs, the patient must have a blood test for hemoglobin with him.
It is necessary to take with you the results of previous studies of respiratory function – for comparison with the obtained data, an outpatient card or medical history.
The process of studying the function of external respiration
At the beginning of the study, the essence of the method will be explained to you. You will need to breathe into the breathing circuit and clearly follow all the commands: breathe with effort, hold your breath, etc.
If necessary, the doctor of our department can offer you or your treating doctor an additional method that will help to make a more complete and reliable functional conclusion.
The duration of the study varies depending on the methods used, but usually no more than an hour. Selection of bronchodilators may require a longer time and repeated visits to the laboratory.