Spirography examination

To assess the condition and functioning of the lungs and bronchi, a technique is used to measure the volume of exhaled air, as well as its speed. This procedure is called spirography or spirometry. The registration of the received data is carried out graphically, for which the investigated indicators are displayed on the screen of a digital device (spirograph). Necessary calculations are performed either by the same apparatus, or by a special program on a personal computer.

In what cases is computer spirography performed?

The implementation of the described survey is recommended with or suspected of the following pathologies:

• bronchial obstruction;
• pulmonary insufficiency;
• asthma;
• pneumosclerosis ;
• hyperreactivity of the bronchi;
• emphysema of the lungs;
• chronic bronchitis ;
• ventilation failure.

Also, this technology is used to monitor the existing diseases of the respiratory system. Spirography in COPD and bronchial asthma allows to evaluate the effectiveness of the treatment, to establish the degree and rate of disease progression.

Why do spirography with bronchodilator?

There are still functional or provocative tests performed by means of a spirograph. For their conduct, you must first take a bronchodilator, bronchodilator.

This type of research is designed to clarify the reversibility of pathological processes in the lungs, to choose the right direction of the therapeutic approach and to correct the treatment regimen.

Basic indices of spirography

The values ​​measured during the survey:

1. LIVED - the vital capacity of the lungs.
2. FVC - forced vital capacity of the lungs.
3. PIC is the peak space velocity.
4. FEV - the volume of the forced expiration It is estimated for ½, 1, 3 seconds.
5. Index Tiffno - the ratio of FEV1 to ZHEL.
6. MOD - minute volume of breathing.
7. Maximal voluntary ventilation of lungs.
8. PostBD - bronhodilatatsionnye samples with the use of drugs.
9. Rovd - reserve volume of inspiration.
10. FMP is a functional dead space.
11. DO - respiratory volume.
12. Rovyd - reserve volume of exhalation.
13. OZL - volume of closure of the lungs.
14. EB - capacity of inspiration.
15. FOL is the functional residual capacity of the lungs.
16. OEL - total lung capacity.
17. OFVd - volume of forced inspiration Also estimated for ½, 1, 3 seconds.
18. BH is the respiratory rate.
19. SOS is the average volumetric expiratory flow rate.
20. MPP is the maximum half-exhaled flow.

The total number of parameters on which the conclusion is drawn exceeds 20 points, since different ratios of the listed values ​​are used to assess the state of the lungs and bronchi.