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Biomedical subjects

B Grabensee

Publications and source records attributed to B Grabensee.

At least 253 records · Page 14Linked to original sources
PubMed1977

Clearance and dialysance of 3H-aldosterone in vitro.

Using an "in vitro dialysis" with different dialyzers, a significant decrease in 3H-aldosterone concentration was seen. From the decrease of 3H aldosterone elimination parameters were calculated. Half time of elimination was 21,5 min, the mean clearance of all dialyzers averaged 32.2 ml/min. The dialysances of 3H aldosterone evaluated with dialyzers of different surface areas were correlated with the surface areas of the dialyzers. From the results can be concluded, that besides individual influences of regulation, haemodialysis influences aldosterone concentration in plasma by physical factors.

Aldosterone↗
PubMed1977

[The value of stimulation of the renin-angiotensin-aldosterone system as a screening test for hypertension (author's transl)].

Renin activity, angiotensin-II concentration and venous aldosterone concentration were measured in 20 healthy subjects and 18 hypertensives before and after stimulation of the renin-angiotensin-aldosterone system. The test did not distinguish between the two groups: in the individual case there was no relationship between renin-activity, angiotensin-II concentration and aldosterone concentration in peripheral venous blood. Stimulation of the system without sodium balance is not a reliable screening test for hypertension.

Adult↗
PubMed1977

[Pharmacokinetics of digitoxin in chronic renal failure (author's transl)].

Digitoxin concentration, measured by radio-immunoassay, was significantly lower in 51 patients in chronic renal failure (23.2 +/- 7.8 mug/l) than in 29 patients in heart failure (26.5 +/- 7.3 mug/l), although both groups were on the same maintenance dose of 0.1 mg daily. Despite a normal serum albumin concentration, digitoxin protein binding was less in uraemic patients than in those with normal renal function. Renal failure did not affect intestinal digitoxin absorption. In patients in chronic renal failure elimination half-time was significantly shorter (5.7 +/- 0.9 days) than in healthy controls (7.6 +/- 1.6 days). There was no significant difference in the excretion of water-soluble ("cardioinactive") digitoxin metabolites in urine between patients in chronic renal and those in heart failure. In patients with normal renal function, of dichloromethane-soluble (cardioactive) metabolites only digitoxin could be demonstrated by thin-layer chromatography. The results indicate that patients in chronic renal failure can safely be given the same dose as those with normal renal function, without danger of over- or underdosage.

Adult↗
PubMed1976

[Postoperative acute renal failure (author's transl)].

Despite progress in intensive therapy and dialysis the lethality of postoperative acute renal failure (ARF) remains very high. Between 1958 and 1976, 374 out of 11474 patients treated in the intensive care unit developed ARF. By conservative treatment that is described in detail, the mortality was reduced from 80 percent (up to 1972) to 50 percent. The mortality rate of dialysis was 86 percent (85 of 98 patients). ARF reflects the severity of the illness of these patients. The prognosis depends besides further complications on the administration of optimal intensive care and early dialysis.

Acute Kidney Injury↗
PubMed1976

[Plasma aldosterone during haemodialysis in patients with terminal renal failure].

In 14 patients with terminal renal failure who underwent dialysis with a solution containing potassium in a concentration of 2 mmol/l, the aldosterone concentration in plasma decreased significantly during haemodialysis. On the other hand a clear increase of plasma aldosterone was observed during haemodialysis in two patients who were dialysed with a solution containing potassium in a concentration of 4 mmol/l. This observation demonstrates the importance of plasma potassium for the regulation of plasma aldosterone concentration during haemodialysis. It suggests that the renin-angiotensin system has no major role in the regulation of aldosterone despite sodium and fluid losses.

Aldosterone↗
PubMed1976

[Treatment of severe hypnotic poisoning with extracorporeal haemoperfusion (author's transl)].

Four patients with severe hypnotic intoxication, twice after suicidal intake of barbital, once of barbital, methaqualone and carbromal, and once of carbromal, were treated with six activated charcoal haemoperfusions. Three patients showed rapid improvement in the level of consciousness followed by complete recovery. One female patient died in cerebral coma due to complete acute cerebromalacia following hypoxia. Serious complications due to the haemoperfusion did not occur. Correct use of activated charcoal haemoperfusion enriches the therapeutic spectrum of severe exogenous intoxications.

Adult↗