[The dynamic of breathing biomechanics and intrathoracic hemodynamics parameters during microgravity modeling].
In ground-based model of the hemodynamics effects of weightlessness, the intersystem relation of breathing and circulation was investigated during inspiration and expiration separately in anesthetized catz. It's shown that the dynamics of central venous pressure, esophageal pressure and filling pressure of the heart during inspiration in supine and head-down tilt position has obvious similarity to those which hypothetically can be present in microgravity. The results suggest that intrathoracic hemodynamics during inspiration in supine and head-down position may be an adequate ground model for investigation of weightlessness influences on intrathoracic circulation.
Donina
Zh A
ZhA
Lavrova
I N
IN
Tikhonov
M A
MA
Kotov
A N
AN
Kolesnikov
V I
VI
Baranov
V M
VM
D000818:Animals; D001696:Biomechanical Phenomena; D001794:Blood Pressure / Q000502:physiology*; D002415:Cats; D045853:Exhalation / Q000502:physiology*; D001239:Inhalation / Q000502:physiology*; D013909:Thorax / Q000502:physiology; D017725:Ventricular Pressure / Q000502:physiology*; D018474:Weightlessness Simulation