Biomedical subjects

K Vosmiková

Publications and source records attributed to K Vosmiková.

4 recordsLinked to original sources

PubMed1998

Biophysical inputs into the software "MIRDose".

Administered amount of activity decides on absorbed dose in thyroid gland during therapy of thyroid cancer tumors by 131I. Medical Internal Radiation Dose (MIRD) methodology estimates this dose as well as influence on other organs. MIRDose--the software implementation of MIRD--is permanently improving and has reached a substantial degree of maturity. Thus the reliability of the results depends predominantly on quality of the input data. The residence time and functional volume of the thyroid gland of a particular patient are the key inputs. Here we concentrate on the former one. We found that the traditionally used mono-exponential model, characterized by the effective half-life, introduces non-negligible modelling error. It cannot be improved by any data processing. For this reason, we proposed a novel accumulation model. Now we inspect influences of differences in the guessed residence time on the outputs of MIRDose. We briefly characterize MIRDose software, recall the improved model and present illustrative results of evaluations.

Humans↗

PubMed1992

[Relation between lipid-bound sialic acid in blood serum and plasma andin human tumors].

Athymic mice with transplanted osteosarcoma and carcinoma of the rectum were found to have increased blood plasma levels of lipid-bound sialic acid (LSA). To verify the applicability of the method of LSA determination, patients with cancer of the mammary gland, rectum, and colon were examined for their LSA level. The serum LSA level was significantly increased in patients with cancer of the mammary gland and rectum, compared to levels determined in the serum of healthy volunteers. The serum LSA level elevation was even more pronounced in patients with carcinoma of the colon. In patients with carcinoma of the colon who were in remission at the time of blood collection the serum LSA level was found to be reduced to control values.

Animals↗

PubMed1992

Utilization of determining lipid-bound sialic acid for the diagnosis and further prognosis of cancer.

In three types of tumors, rectal carcinoma, large intestine carcinoma and bronchogenic carcinoma, the level of lipid-bound sialic acid (LSA) was determined in blood serum before and after surgical operation. In all the cases, there was a significant increase of LSA content in comparison with healthy controls. Considerable increase in LSA values was observed in patients in relapse after surgical intervention. In contrast to this, in patients with regression the LSA levels were lower as compared with LSA levels prior to the surgical intervention. We believe that the method of determining LSA level could be used not only for the diagnosis of cancer, but also for the prognosis.

Carcinoma, Bronchogenic↗

PubMed1989

Changes of lipid-bound sialic acid in the plasma of mice bearing benzpyrene-induced tumors.

The level of lipid-bound sialic acid (LSA) was followed in inbred C57Bl/6 mice bearing tumors induced by benzpyrene at a dose of 20 mg per kg of body weight. In the plasma of mice with macroscopically ascertained tumors, the level of LSA was increased significantly. The LSA level was also significantly increased in the plasma of suspect mice i.e., in a period when the tumor was not yet macroscopically ascertained, however, when a change was observed in the motion of the hind limb of mice to which benzpyrene was administered.

Animals↗