Cerebrovascular Time Constant in Patients with Head Injury.

The cerebrovascular time constant (τ) theoretically estimates how fast the cerebral arterial bed is filled by blood volume after a sudden change in arterial blood pressure during one cardiac cycle. The aim of this study was to assess the time constant of the cerebral arterial bed in patients with traumatic brain injury (TBI) with and without intracranial hematomas (IH). We examined 116 patients with severe TBI (mean 35 ± 15 years, 61 men, 55 women).

[Rocuronium bromide as component of general anaesthesia in patients with traumatic cerebral compression].

The choice of myorelaxation agent for rapid sequence tracheal intubation for surgical cerebral decompression is a less studied question in neuroanaesthesiology. 32 patients with cerebral trauma (GCS<8) were involved in the study. Influence of succinylcholine and rocuronium bromide on cerebral circulation, intracranial pressure, cerebral perfusion pressure and systemic haemodynamics was assessed.

[Changes in cerebral blood flow, intracranial and cerebral perfusion pressure in neurosurgical patients during anesthesia induced with diprivan].

Effect of diprivan on cerebral blood flow, intracranial (ICP) and cerebral perfused pressure (CPP) was studied in neurosurgical patients during induction narcosis. The labored perfusion syndrome was observed in all patients during the initial stage. Infusion of diprivan at the initial stage of narcosis in a dose of 2 mg/kg led to a decrease in arterial pressure, mean arterial pressure, CPP, and ICP.

[Possibilities of quantitative assessment of perception of weight by the muscle analyzer].

The possibility of creating purely instrumental methods to study the sensory sphere was shown by an example of a muscle analyzer. The methods are necessary for the development and optimization of man-machine systems, in particular, virtual reality. Earlier the connection between a stimulus and perception was estimated by a statistical analysis of subjective answers of an examinee concerning the perception and lack perception or the difference between two similar stimuli.

[Study of acoustic waves in stressed muscle].

The spectral characteristics of mechanical vibrations generated by stressed human biceps, referred to as "muscle sounds", were studied. Attempts were made to establish a relationship between these vibrations and conformational rearrangements of muscle proteins during contraction. It was found experimentally that the steepness of the spectral amplitudes of vibrations varies with muscle load.