Spiropolygraph

Spiropolygraph

Spiropolygraph (from Latin spirō - to breathe, Greek πολυγραφῖα - writing instrument for long writing) is a device used to assess the functional state of the respiratory system of humans or animals, developed at the beginning of the 20th century by Felix Putovsky [1]. The device allows you to record a person’s inhalations and exhalations in real time, as well as the time it takes for each inhalation and exhalation, breathing frequency and the total duration of the respiratory cycle. Spirograms - a visual display of breathing parameters during examination using a pulmonary apparatus - are used in a variety of fields, including medicine, physiology, sports science, etc.

Spirographic examination As a rule, spirography is performed by a pulmonologist, and the procedure resembles a dialogue between him and the patient. The doctor is interested in complaints, indicates the possible causes of their occurrence, talks about the features of the study and the rules of behavior of the patient before and during the procedure. After this, the doctor begins the procedure, asking the patient some questions, if he is not unconscious or otherwise uncoordinated. To understand the clinical information received from the patient, it is necessary to identify the parameters that are most significant for various diseases of the respiratory system. The most commonly used classification of parameters is:

- ratio (regression) of the forced expiratory area to the forced expiratory volume; - Tiffno index; - forced vital capacity of the lungs (FVC); - peak forced pulmonary expiratory volume.