[The microcirculatory bed of the rabbit pinna under increased blood concentration]. / Mikrotsirkuliatornoe ruslo ushnykh rakovin krolika v usloviiakh povyshennoi gemokontsentratsii.

Microvessels of rabbit left and right ear chamber and blood samples drawn from the internal ear vein in response to hemoconcentration were studied. The apparent viscosity of the outflowing blood in the left side was shown to be preserved with an increase of hemoconcentration. In the right one episode of increasing occurred. The invariance of the total area of perfused microvessels to increased hemoconcentration in the right side was fixed, whereas in left side it changed. The variation of regional resistance was analysed on the basis of our data according to Poiseuille's [correction of Puazeil] equation.

[Microcirculatory bed of the auricle floor in rabbits after blood substitution]. / Mikrotsirkuliatornoe ruslo ushnykh rakovin krolika posle krovezameshcheniia.

Microvessels of rabbit ears chamber and blood samples drawn from the internal ear vein have been studied after blood substitution. It has been shown that the left microvessel bed responds to the hemodilution with 38% decrease of its length and 5.9% decrease of the mean diameter of its vessels, decrease apparent viscosity of outflowing blood, but RBC concentration per volume unity of blood (N) being preserved. The right one--with 7.8% increase of microvessel diameter, their length being preserved and 10% increase of the N.

[Morphofunctional asymmetry of the microvascular bed of the rabbit concha auriculae]. / O morfofunktsional'noi asimmetrii mikrotsirkuliatornogo rusla ushnykh rakovin krolika.

Microvessels of rabbit ears chamber and blood samples drawn from the internal ear vein after 30 min ischemia were studied. In the initial state the length of the left ear microvascular bed was 1.5 times higher, mean microvessel diameter 14.6% less, apparent viscosity of outflowing blood 16.8% less, RBC concentration per volume unity of blood 8% higher, RBC electrophoretic mobility 13.7% higher than those in the right one. It was shown that the left microvessel bed responds to the ischemia with the 13.2% increase of its length and 13.6% increase of the outflowing blood viscosity, the right one--with the 9.7% increase of microvessel diameter and 7.9% decrease of the viscosity.

[Rheologic and morphometric parameters of the microcirculation bed in the rabbit ear following local ischemia]. / Reologicheskie i morfometricheskie parametry mikrotsirkuliatornogo rusla ukha krolika posle lokal'noi ishemii.

Microvessels of the rabbit ear chamber and blood samples drawn from the internal ear vein were studied after 30-min ischemia. Total microvascular bed area augmented by 16%, total microvascular bed length increased by 9% and mean microvascular diameter increased by 6.7%. One hour after the onset of ischemia it is only the diameter that remains augmented. In the control experimental series apparent viscosity of the blood flowing from the ischemic area did not correlate with the degree of vascularization, negative relation with vessel length (p = --0.461) and positive relation with the diameter (p = 0.799) being revealed. After ischemia only the viscosity-diameter relation remained significant (p = 0.466). The correlation matrix 10 X 10 which reflected the connection between other parameters characterizing specificity of blood supply regulation is given.

[Effect of prostaglandin F2 alpha on the microvessels in a transparent chamber implanted in the rabbit concha auriculae]. / Vliianie prostaglandina F2 al'fa na mikrososudy v prozrachnoi kamere,vzhivlennoi v ushnuiu rakovinu krolika.

The television analysing system LEITZ-TAS was employed to evaluate quantitative characteristics of the regeneration of microvessels in a transparent chamber implanted in rabbit ear under the influence of PGF2 alpha. It was established that formation of the microvascular network had been completed by the end of the first month after implantation of the chamber. Chronic injection of PGF2 alpha in the dose applied slowed down the growth of new microvessels and led to the constriction of arterioles and venules.

[Interrelation of the changes in the blood rheological properties and the microcirculatory disorders in the early and late stages of experimental hyperlipoproteinemia]. / Vzaimosviaz' izmenenii reologicheskikh svoistv krovi i narushenii mikrotsirkuliatsii na rannikh i pozdnikh stadiiakh éksperimental'noi giperlipoproteidemii.

Experiments were made on rabbit fed an atherogenic diet (0.5 g/kg cholesterol) singly for 15 and 24 h and repeatedly for 3, 9 and 30 days. At early stages of lipid metabolism distress the interrelationship was established between blood rheological disorders and microcirculatory abnormalities. The dependence of the initial reaction of some rheological characteristics on their initial level was marked.

[Modification of the construction and insertion of a viewing chamber for the study of microcirculation in the subcutaneous compartment of the rabbit ear]. / Modifikatsiia konstruktsii i vzhivleniia prozrachnoi kamery dlia izucheniia mikrotsirkuliatsii v podkozhnoi kletchatke ukha krolika.

Modification of the transparent chamber and the operation of its implantation into the tissues of the rabbit ear are described. The chamber is intended for the study of microcirculation in the subcutaneous cellular tissue of the rabbit ear. The chamber design has a number of advantages in comparison with the known models: optic characteristics are improved, assembly of the chamber is simplified, new design permits to use the regenerated tissue for further histological study. Sterilization of the chamber with gamma rays is simple and effective. The chamber is fixed in the tissues of the rabbit pinna by means of a lavsan net. An additional gluing of the latter excludes a possibility of the penetration and development of secondary infection into the operation wound and fixes the chamber in the ear tissues more firmly.