ABSTRACT
Mathematical modeling is the most expedient method for studying the response of human cardiovascular system to a combined effect of several external factors, in particular, hemorrhage and hypothermia. A complex mathematical model integrating models of the functional systems of human body and the physiological effects of disturbing factors can be used to study the combined effect of external factors. It allows the response of human body to various combinations of external effects of different intensities to be assessed with high accuracy. In addition, the model makes it possible to prognosticate the dynamics of changes in the cardiovascular system parameters from their initial variation. This facilitates prediction of the development of patient's state.
Subject(s)
Cardiovascular System/physiopathology , Hemorrhage/physiopathology , Hypothermia/physiopathology , Models, Cardiovascular , Hemodynamics , HumansABSTRACT
Efficiency of different means (thermoinsulating blankets, warmers, heliox mixtures) used to eliminate hypothermia of varying degree was evaluated with a complex model of interrelated physiological systems.
Subject(s)
Cardiopulmonary Resuscitation/methods , Emergency Medical Services , Hypothermia/therapy , HumansSubject(s)
Aerospace Medicine , Monitoring, Physiologic , Space Flight , Adult , Health Status , Hemodynamics , Humans , MaleABSTRACT
Using piezoelectric transducers, resonance frequencies of different body parts of rats exposed to whole-body vertical vibration were measured. The exposure was as follows: acceleration--8 m/sec2, head--75-80 Hz, chest 225-230 Hz, and abdomen--27-29 Hz. An attempt was made to determine roughly an interspecies (man-rat) coefficient with respect to resonance frequencies which was estimated to be 0.2-0.25.
