Human Life Research on ISS Russian Segment

Dykhanie Experiment


Objective:

Study of fundamental physiological mechanisms of external breathing function under long-duration orbital flight conditions.

Tasks:

  • Study of dynamics of relationship between thoracic (pectoral) and abdominal functional breathing reserves and their realization potential during spontaneous breathing.
  • Assessment of functional state of respiratory system motility by dynamics of thoracic and abdominal components of forced inhalation and expiration rates.
  • Study of coordinated spontaneous respiratory movements by dynamics of relationship between thoracic and abdominal components of volumetric, time and rate parameters of spontaneous respiratory cycle.
  • Identified features of humoral-reflex regulation of breathing by dynamics of ventilation sensitivity of thoracic and abdominal components to chemoreceptor stimuli.
  • Study of features of voluntary control of respiratory movements by dynamics of time-dependent and precision characteristics (spirokinography)

Science Hardware Used:

    Set "Dykhanie-1" containing:
  • combined unit for signal generation;
  • belt PG-T (thoracic);
  • belt PG-A (abdominal);
  • calibrator;
  • branch pipe;
  • bag.
    Set of accessories "Dykhanie-1" (2 pieces) containing:
  • resistor;
  • mouthpiece (3 pieces);
  • nasal clip;
  • bag.

Flight Equipment Used:

Onboard computer for medical support of Model IBM Think PAD A31p-RSE Med.

Consumables:

    Kit "Dykhanie-1. Data" containing:
  • memory card (CF);
  • adapter CF PCM CIA;
  • cover.

Expected Results:

Studies of cosmonauts respiratory system enable to get a better understanding of basic mechanisms of pulmonary respiration/gas exchange gravitational relations.

Experiment Results:

During conduct of the experiment the following physiological signals are recorded:

  • pneumotachogram;
  • thoracic pneumogram;
  • abdominal pneumogram;
  • pressure in oral cavity.

All experimentally derived physiological data, as well as environmental data on the date of conducting the experiment and personal data on the person under examination are recorded on PCMIA card, which is to be returned to the ground upon completion of the Expedition.