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Biomedical subjects

M V Barkan

Publications and source records attributed to M V Barkan.

7 recordsLinked to original sources
PubMedDate not supplied

[Noninvasive determination of oxyhemoglobin in arterial blood].

The authors describe the principles of noninvasive measurements of oxyhemoglobin content in the arterial blood by processing the signals obtained as a result of passing the light waves of the infrared (940 nm) and red (660 nm) wave bands through tissues. The data obtained with the first Russian pulse oximeter and with the hemoximeter were found to coincide. The diagnostic value of oximetry is discussed.

Arteries↗
PubMedDate not supplied

[Effects of the delay of electromagnetic distributor release on the performance of artificial lung ventilation devices].

Over the past years, medical industry has been manufacturing series-produced outfits of the PO-6H-05 type for artificial pulmonary ventilation (APV), in which the movement of the bellows of the respiratory contour is exercised at the expense of the switching by electromagnetic distributors (EMD). The reduction of the time of EMD release, that monitors the bellows movement upwards raises the accuracy of the indicator readings of the APV outfit of the PO-6t-05 type relative to the waste gas volumes. To decrease the time of EMD release, it is necessary to adhere to requirement 11. The magnitudes of the errors made are depicted by formula 9.

Electromagnetic Phenomena↗
PubMedDate not supplied

[Method and results of the study of excursion of peripheral arterial (precapillary) walls].

A photoelectric method was employed for examining excursion of peripheral arterial vessels (precapillaries) walls in the middle of the first phalanx of the forefinger of man. The magnitude of the mean amplitude of walls excursion was found to be equal to about 18.5 microns. It is concluded that the shape and amplitude of the curve obtained may serve the basis for estimating the tone of the precapillaries, the time of the volume increase/decrease, and the extent of vascular enlargement.

Arteries↗