Spirometry : performance and results of the study


1. When appointed?

2. Contraindications

3. How to prepare?

Spirometry (spirography) - a non-invasive method for the diagnosis of respiratory function.It is based on measuring the speed parameters of respiration and lung volume.This technique is often used on patients with bronchial asthma, prolonged cough, shortness of breath or a feeling of shortness of breath, chronic obstructive pulmonary disease, etc.

spirometry analysis can effectively determine how the airways and lungs can inhale and exhale air delay.Spirometry is performed using an appropriate instrument - spirometer.He leads the uninterrupted registration of the change in volume inhaled and exhaled air.Spirometer consists of an electronic device that transforms the sensor reading, which measures the flow of air into digital information, and then makes the necessary calculations.The result of the study is a graphical view.

During the diagnostic device worn on a disposable mouthpiece.The patient should be in a sittin

g or standing position.He is given a mouthpiece connected to a breathing tube, and put on a special nose clip that prevents the ingress of air into the nose during the procedure.At a signal from the doctor the patient takes a deep breath so as to completely fill the lungs with air.You must then exhale the most strongly in the spirometer.The instrument will measure and record the velocity and volume of air that passes through it at different stages of inhalation and exhalation, as well as some other factors.

When he appointed?

Spirometry appointed:

  • if the respiratory system using X-ray or other methods of investigation found some changes;
  • if the patient complains of the poor condition of the respiratory system;
  • in violation of gas exchange, when there is a decrease saturation, hypoxemia, hypercapnia, as well as changes in the indices of laboratory and clinical diagnostics;
  • when you need to pass medical and social expertise;
  • in preparation for the implementation of invasive research methods, including bronchoscopy, and various surgical interventions, for example, in the treatment of pathologies of the lungs.


conduct a diagnosis of possible patients of different age categories, including children.However, in this method, there are some contraindications: presence of pneumothorax, aortic aneurysm, pulmonary hemorrhage and hemoptysis, in the postoperative period, ieduring the months after the surgery (in the abdominal or chest cavity).In addition, spirometry is contraindicated in the case where the lower extremities is observed failure of venous valves, as well as varicose disease, uncontrolled hypertension, metabolic and trophic disorders, tendency to increased blood clotting.The procedure is also considered to be dangerous for patients who have had a stroke or myocardial infarction within the last three months.

How to prepare?

To get the most accurate results, this diagnosis is carried out on an empty stomach.The patient is not desirable to take medicines that affect the respiratory system.In addition, it is advisable to exclude from the diet drinks that contain caffeine (coffee and tea).

Before making the diagnosis the patient should relax corset belts and tie, if any.Dentures not allowed to shoot.On the eve of the study can not smoke.If the procedure takes place in the cold period, the patient is required to warm up for half an hour.

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