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Biomedical subjects

A K Usovich

Publications and source records attributed to A K Usovich.

8 recordsLinked to original sources
PubMed1998

[Formation and development of prostatic hemomicrocirculatory bed in children and young men].

Age changes of the human prostate hemomicrocirculatory bed from 20 weeks of embryogenesis up to the 22 years of age were studied by histological, histochemical and morphometric methods in 113 prostatic glands. Two types of microcirculatory systems were established to be present in human prostate by the moment of birth: microvasculo-glandular complexes in lateral and posterior regions and myomicrovascular complexes, located basically in anterior regions of the gland. During neonatal and pubertal periods, when essential changes in organ structure occur, microcirculatory bed reacts by vessels dilatation. The greatest growth of all hemomicrocirculatory bed branches occur at the age of 13-16 years. In young men widened capillaries located as processes radiating from the glandular lumen and separated from them by a single layer of secretory cells appear in initial regions of glands.

Adolescent↗
PubMed1985

[Segmented lymph nodes in man].

Segmentary lumbar, posterior pancreato-duodenal and inferior tracheobronchial lymph nodes have been investigated macro- and microscopically. The segmentary lymph nodes reach 12 X 45 X 45 mm, 10 X 25 X 100 mm in size. Most often these nodes are found among the posterior pancreato-duodenal lymph nodes (92%). They represent a conglomerate of smaller lymph nodes growing together and having their own capsule, parenchyma, sinuses, afferent and deferent lymph vessels and are united into one large node.

Abdomen↗
PubMed1983

[Anatomy and topography of the regional lymph nodes of the liver and gallbladder].

Regional lymph nodes of the liver and gallbladder were examined in the autopsies of 80 adults (aged 17-96) in whom deaths were caused by factors not associated with lymph or gastrointestinal tract lesions. Lymphatic vessels of the liver and gallbladder are discharged into the lymph nodes of ten groups in abdominal cavity and four groups--in thoracic cavity. Also, they are discharged into thoracic duct. All lymphatic vessels of the liver and gallbladder are discharged into hepatic and pancreato-duodenal nodes only. The size of regional lymph nodes of the liver and gallbladder varies within 1-75 mm.

Adolescent↗
PubMed1982

[Variants in the number and size and the topography of the lumbar lymph nodes in the regional of the liver in the human adult].

By means of interstitial and direct injections of the lymphatic bed of the liver and gall bladder, their regional lymph nodes from the lumbar group have been studied in 63 corpses of mature persons of both sex. The hepatic lymph vessels flow into the lumbar lymph nodes in 73% of cases. Only the postaortal nodes (situating behind the abdominal part of the aorta) do not take the hepatic lymph nodes. The number of the hepatic regional lumbar lymph nodes varies from 1 to 6, and their size is within the limits 2X2--30X10 mm. In 13% of cases intercalated lumbar lymph nodes have been revealed (6X4 mm in size), they are situated along the pathway of the visceral surface of the lymph vessels (of the right hepatic lobe) running towards large intermediate lumbar lymph nodes.

Adolescent↗
PubMed1981

[Is there an intestinal lymphatic trunk in man?].

As the analysis of the literature demonstrates, in spite of a rather wide use of the term "tr. intestinalis" and its inclusion into the PNA, it is still not clear what should be understood under this term concerning the human being. It has been stated, by means of coloured mass injections into the efferent lymphatic vessels of the hepatic, celiac and superior mesenteric lymph nodes, that there is no common efferent lymphatic trunk as a result of fusion of these vessels mentioned above. The efferent lymphatic vessels of the hepatic and celiac lymph nodes terminate in the lumbar lymph nodes; 92.1% of the efferent lymphatic vessels of the superior mesenteric lymph nodes also terminate in the lumbar lymph nodes and only 7.9% of these vessels terminate in the thoracic duct or in one of its roots. Thus, there is no classical lymphatic intestinal trunk (middle root of the thoracic duct) collecting lymph from all abdominal organs and discharging into the thoracic duct.

Adolescent↗
PubMed1981

[Anatomy and topography of adult human hepatic lymph nodes].

In 63 corpses of mature persons of both sex at the age of 17-96 years, anatomy and topography of hepatic lymph nodes have been studied by means of interstitial injections into the liver and gallbladder. In 98% of cases from 1 to 10 lymph nodes have been revealed. They have been subdivided into 3 subgroups: the hepatoduodenal ligament lymph nodes (1-8 nodes, from 1 x 1 x 1 mm to 43 x 8 x 6 mm in size, situating near the vessels and bile ducts which run in between the layers of the ligament), the gallbladder lymph nodes (1-3 nodes, from 2 x 1 x 1 mm to 15 x 7 x 5 mm in size) situated at the neck of the gallbladder, and the lymph nodes near the common hepatic artery (1-3 nodes, from 3 x 2 x 2 mm to 45 x 12 x 6 mm in size). It has been stated that during adolescence and mature age, the number of the lymph nodes varies within greater range than during elderly and old age.

Adolescent↗