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Biomedical subjects

R Klapdor

Publications and source records attributed to R Klapdor.

At least 109 records · Page 6Linked to original sources
PubMed1977

The ultrasonically guided puncture of the gallbladder in amimals. A new methodological procedure for a simple and non-surgical collection of gallbladder bile.

In 4 piglets the gallbladder was punctured under sonographic control threetimes during a period of 46 days. Each puncture was proved by X-ray controls after application of 2-4 ml of a water soluble contrast medium. One day after the third puncture all animals were killed in order to look for macroscopic or microscopic lesions of the gallbladder, the adjacent liver tissue and the peritoneum resulting from the experimental procedure. The results indicate that the ultrasonically guided puncture of the gallbladder represents a procedure to obtain pure bile samples in the piglet or animals of similar size in a simple and non surgical and, therefore, most physiological manner.

Animals↗
PubMed1976

Improvement of biliary excretion of ioglycamide by pretreatment with phenobarbital.

The influence of a phenobarbital pretreatment on the distribution and biliary excretion of Ioglycamide was studied in 6 experiments in the anaesthetized minipig. The phenobarbital pretreatment led to a significant increase of the biliary transportmaximum and the biliary concentration of Ioglycamide. A detailed analysis suggests a phenobarbital induced stimulation of the hepatocellular excretion. The applicability of a pretreatment with phenobarbital in order to improve the opacification of the biliary system during x-ray-examinations with Ioglycamide is discussed.

Animals↗
PubMed1976

[On the mechanisms of biliary excretion of the biliary contrast medium ioglycamide in the mini-pig with special regard of the importance of the bile flow (author's transl)].

16 experiments were performed in order to investigate the mechanisms of biliary excretion of Ioglycamide in the mini-pig. The results confirm the mechanisms known from other species for this experimental animal. Additionally, however, they demonstrate a significant linear correlation between the spontaneous bile flow and the biliary transport-maximum of Ioglycamide. It is concluded that this correlation is due to the fact that the bile flow as well as the transport-maximum represent independent parameters of the excretory capacity of the liver cells. This conclusion is supported by further experiments that were unable to show an improvement of the biliary transport-maximum of Ioglycamide by stimulation of the bile flow during infusions of bile acids and secretin. These results prove the impossibility to enhance the biliary excretion of Ioglycamide by stimulation of bile flow. This, however, indicates that it is possible to dilute or concentrate the biliary Ioglycamide concentration by induced variations of bile flow, a fact that might become important to improve the efficiency of i.v. cholegraphy.

Animals↗
PubMed1975

[Comparative studies in blood, bile and urine to the biliary excretion and multicompartmental analysis of glycocholic acid in the unanaesthezized pig (author's transl)].

A new model for experimental research in pigs is reported. It allows comparative analyses in blood, bile and urine in the unanaesthetized pig. Preliminary results to the physiology of biliary excretion and multicompartmental analysis of conjugated bile acids emphasize the applicability of the experimental model. On the basis of these results it is pointed out, that it is possible to analize the distribution and excretion kinetics of conjugated bile acids, namely C14-glycocholic acid, by a 3-compartmental analysis.

Administration, Oral↗
PubMed1975

[Mechanisms of bile secretion in mini-pigs (author's transl)].

The mechanisms of bile excretion are investigated in 27 experiments in 21 mini-pigs. The results confirm the known three fractions of bile flow for mini-pigs, too: a canalicular bile acid dependent, a canalicular bile acid independent and a ductular bile acid independent bile flow. These different fractions of bile flow may be stimulated either by taurocholate, by phenobarbital and ioglycamide or by secretin and pancreozymin. The total bile acid pool amounts 4,4 mMol. Measurements of its distribution over the gallbladder and the enterohepatic circulation after fasting for 18-24 hours emphasize the importance of the gallbladder resp. the fasting as factors that may be responsible for the secretion of lithogenic bile.

Animals↗
PubMed1975

[Nephropathy and deafness (Alport syndrome) without positive family history (author's transl)].

This is a report of a 22-year-old man affected with hereditary nephropathy and deafness (Alport syndrome) without positive family history. The diagnosis is based on the typical clinical history, presence of symmetrical neural deafness, and terminal stage of renal insufficiency, that could not be classified otherwise following renal biopsy. The differential diagnosis and genetics are discussed.

Adult↗