[Some aspects of microsurgical decompression of neurovascular formations of the spinal canal in lumbar osteochondrosis]. / Nekotorye aspekty mikrokhirurgiheskoi dekompressii nervno-sosudistykh obrazovanii pozvonochnogo kanala pri poiasnichnom osteokhondroze.

Microsurgical techniques have been developed for decompression of neurovascular formations of the vertebral canal in lumbar osteochondrosis. Surgical policy has been proposed in relation to the site of hernial prolapse by the disk diameter. The use of this policy provides the minimal traumatism of surgical interventions in posterolateral hernias in particular.

[The monitoring of gas bubbles with a pulsed Doppler ultrasonic locator in humans working in a space suit]. / Monitoring gazovykh puzyr'kov ul'trazvukovym impul'sno-dopplerovskim lokatorom u cheloveka pri rabote v skafandre.

Presented are results of gas bubbles monitoring in decompressed humans with the use of an ultrasonic pulse-Doppler locator (PDL). Unlike the classic Doppler bubbles detectors with continuous US emission, PDL is adjusted for reception of echo from a chosen volume of the right ventricle cavity; thus, the clutter due to cardiac beats and human locomotion is successfully rejected. During simulation of Russian EVAs, venous gas bubbles were detected in 3 out of 5 experiments with test-subjects clothed in everyday wear and in 2 out of 3 experiments with suited test-subjects.

[Physical performance and function of the cardiorespiratory system in additional respiratory resistance]. / Fizicheskaia rabotosposobnost' i funktsii kardiorespiratornoi sistemy pri dobavochnom soprotivlenii dykhaniiu.

This paper presents results of examining respiration and circulation parameters of healthy volunteers pedalling a bicycle ergometer at different degrees of inspiratory-expiratory resistance. In this situation the performance-limiting factor is an increased load on respiratory muscles. An additional signal of performance problems is respiratory discomfort. The paper gives a formula for predicting maximally allowable workloads in response to increased respiration resistance.

[Effect of increased respiratory resistance on human work capacity]. / Vliianie uvelichennogo soprotivleniia dykhaniiu na rabotosposobnost' cheloveka.

Respiratory responses to external resistive resistance are discussed, having in view data in the literature and experimental results obtained by the present authors. The adverse changes induced by this factor during muscle work are described with special emphasis on performance deterioration. Some considerations are presented which are related to the physiological implications of the maximal allowable values of respiratory resistance produced by the breathing system upon workloads of various intensity and duration.

[Evaluation of the effect of excess intrapulmonary pressure on human respiratory function]. / Otsenka vliianiia izbytochnogo vnutrilegochnogo davleniia na funktsiiu dykhaniia cheloveka.

The parameters characterizing lung ventilation and electrical activity of expiratory muscles were investigated in six healthy young men exposed to the positive intrapulmonary pressure 20, 30 or 40 mm Hg. Gas mixtures with a varying oxygen content were used. The effect of two compensatory devices that applied different counterpressures to the body surface was evaluated. It was found that the parameter that can best characterize the respiratory function in the case of a positive intrapulmonary pressure is electrical activity of expiratory muscles. The hypoxic effect makes no important contribution to the change of respiratory parameters during short-term exposures to the positive intrapulmonary pressure 20, 30 or 40 mm Hg. The different methods of applying compensation do not influence changes in the above respiratory parameters.