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Biomedical subjects

S V Andronov

Publications and source records attributed to S V Andronov.

18 recordsLinked to original sources
PubMed1996

[Radioisotope study of portal blood flow in extrahepatic portal hypertension in children].

The volume of portal blood that goes through the liver in portal hypertension is unknown up today. The level of portal perfusion after distal splenorenal bypass creation is not known either. Radioisotope splenography and mesenteriocoportography have been used to measure this level. It was found that in half of children with EPH more that 50% of the splenic blood and 100% of the blood from the superior mesenteric vein passes through the liver. The creation of the distal splenorenal bypass provided the perfusion at the level between 32 and 100% from the starting point. 100% of portal blood will pass to lungs through the bypass after traditional bypass operations.

Adolescent↗
PubMed1991

[Roentgenologic endovascular occlusion of the spleen in the treatment of hereditary spherocytic hemolytic anemia in children].

Roentgenoendovascular occlusion of the spleen has been suggested for the treatment of children with hereditary spherocytic hemolytic anemia as an alternative to splenectomy. The operation was conducted in 8 children aged from 1 to 11 years. Selective decontamination of the intestine was used for prevention of inflammatory complications. Occlusion of 60% of the splenic parenchyma results in a stable clinico-hematological effect and can be performed as a single stage. Young children could be operated on by this method.

Angiography↗
PubMed1985

[Potentialities of gamma-scintigraphy in the diagnosis of Meckel's diverticulum in children].

Altogether 84 children aged 1 to 15 were examined. The index of 99mTc-pertechnetate relative accumulation in the ectopic gastric mucosa was proposed to be used to objectify and improve the quality of diagnosis of Meckel's diverticulum. The index over 42% was shown to be typical of Meckel's diverticulum and it can be used for automated diagnosis of the disease. The use of the above quantitative index made it possible to reject 20% of false positive results obtained at visual interpretation of scintigrams.

Adolescent↗
PubMed1984

[Radionuclide diagnosis of acute hematogenous osteomyelitis of the long tubular bones in children].

Computerized osteoscintigrams of 54 children with osseous diseases (osteomyelitis, osseous tumors and arthritis) were analysed. 99mTc-pyrophosphate elevated accumulation in inflammatory processes was observed not only in the pathological zone but also in the epiphyses of the affected limb. The accumulation of the radiopharmaceutical agent calculated in several zones of the affected and healthy limbs provides for significant differential diagnosis of acute hematogenic osteomyelitis. In case of bone symmetric involvement by an inflammatory process and in osteomyelitis of the flat bones and the vertebral column the potentialities of the method are limited.

Acute Disease↗
PubMed1983

[Radiorenoangiography in the study of renal blood circulation in children].

The renal blood circulation was studied in 17 children aged 3 to 14 using a method of adaptive simulation of the organ blood flow. The main condition for radiorenoangiography is to place correctly a gamma-chamber of the heart, lungs and kidneys in the field of vision of the crystal. It is a requisite condition for the calculation of absolute and relative renal perfusion depending on the cardiac ejection. If a patient's body size does not make it possible to have the heart and kidneys in the field of vision of the collimator at a time, one can choose the spleen as the "model" organ. The analysis of angiographic results has shown that the share of the cardiac ejection which is responsible for the renal circulation and organ function respectively, is quite a stable value that is not associated with a patient's age and body mass. Irrespective of the state of the central hemodynamics and a patient's age, the most objective information on renal perfusion proceeds from an analysis of relative indices (or perfusion indices) that are calculated on the basis of the cardiac ejection expressed in percentage (or another model organ).

Adolescent↗
PubMed1983

[Modelling of organ blood flow in computer gamma scintigraphy].

The determination of the relative blood flow in organs is sometimes of greater diagnostic importance than the estimation of respective absolute indices. A detailed analysis of indispensable mathematical calculations is presented. The authors propose an algorithm and optimum sequence of calculations of relative organ perfusion using computer. The paper can be of wide applied importance.

Computers↗