[The effect of freezing the kidney in the terminal stage of hydronephrosis on its parenchymal function, arterial pressure regulation and erythropoiesis]. / Vliianie zamorazhivaniia pochki v terminal'noi stadii gidronefroza na sostoianie ee parenkhimy, reguliatsiiu arterial'nogo davleniia i éritropoéza.

The authors studied morphological changes in renal tissue in terminal hydronephrosis and in exposure of freezing, regulation of arterial pressure and erythropoiesis in cryogenic effects on hydronephrotic kidney in experiment. Reparative changes in the parenchyma appear on day 30 after freezing, systemic arterial pressure and bone marrow erythropoietic activity returned to normal. Freezing is thought more physiological compared to nephrectomy in respect to prevention of nephrogenic hypertension and anemia.

[Cryogenic effect on renal tissue and condition of intrarenal hemodynamics]. / Vliianie kriogennogo vozdeistviia na tkan' pochki i sostoianie intrarenal'noi gemodinamiki.

The paper presents experimental evidence on morphologic changes in intact kidney, tissue temperature, renal blood supply and glomerular filtration in response to freezing. Cryogenic effects manifested as necrotic and dystrophic processes. Damage to the tubular and glomerular cells can be corrected. Blood flow in the kidney was not interrupted but was directed through the bypass routes.

[Spectrum analysis of vestibular nystagmus]. / Spektral'nyi analiz vestibuliarnogo nistagma.

A procedure for the spectral analysis of nystagmograms obtained by rotary stimulation with the rate of 180 degrees/s for 20 s has been developed with the aim to reveal the most typical changes in the vestibular nystagmus with one or another form of the cochleovestibular pathology. A signal recorded in the analogous form was processed by computer EC-1022. Periodograms were calculated by the method of the fast Fourier transform and periodogram smoothing by averaging of realization sites. In case of Ménière's disease the third harmonic was not recorded on periodograms when right and left labyrinths were stimulated and in the case of neurites of acoustic nerves, the third or fifth harmonic was not observed. A supposition is advanced that the third harmonic reflects the state of the peripheral area of the vestibular analyzer, while the fifth harmonic--the central one.