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Biomedical subjects

A Manitius

Publications and source records attributed to A Manitius.

At least 55 records · Page 3Linked to original sources
PubMed1969

The importance of aerobic metabolism in the renal concentrating process.

The extent to which the concentrating function of the kidney depends on oxidative processes was investigated by infusing cyanide into one renal artery of dogs undergoing mild mannitol diuresis while receiving an infusion of vasopressin. This produced an abrupt fall in concentrating capacity (T(c) (H2O)) that was reversed when the cyanide infusion was stopped. The change could not be accounted for by the accompanying solute diuresis, since it was not reproduced by increasing the rate of mannitol infusion. The reduction in T(c) (H2O) induced by cyanide did not result from increased delivery of dilute urine to the collecting ducts, since free water clearance (C(H2O)), studied in other dogs during water diuresis, was unchanged or decreased by cyanide. Cyanide produced renal vasodilatation, as did intraarterial acetylcholine, but in contrast to the striking reduction in concentrating capacity evoked by cyanide, T(c) (H2O) was not significantly changed by acetylcholine. The data indicate that concentrating ability is closely tied to oxidative metabolism in the kidney, and it is suggested that the region where this is critically important is the red medulla and the thick ascending limb of Henle's loop.

Acetylcholine↗
PubMedDate not supplied

[Clinical estimation of 1-alpha-hydroxycholecalciferol in treatment of patients with chronic renal failure].

31 adult patients (15 male and 16 female) with chronic renal failure were treated for 6 months with 1-alfa-hydroxycholecalciferol on a dose 0.25-2.0 micrograms/24 h. 15 patients with not very advanced renal failure (serum creatinine level 176.8-442 mumol/l) received conservative therapy (group I), 16 patients with serum creatinine value 884-1326 mumol/l were treated by intermittent hemodialysis (group II). The statistically significant decrease of serum alkaline phosphatase activity in group I and II (p < 0.01), the rise of serum calcium level in group I (p < 0.005) were determined. Half of the patients from both the groups stated the relief or disappearance of bone and joint pains and muscle weakness. Besides in group I significant decrease of creatinine clearance (p < 0.001) and increase of serum urea and creatinine value (p < 0.01) were noticed. On the basis of these results we can conclude that the treatment with 1-alfa-hydroxycholecalciferol, produced by "Polfa", ought to be introduced gradually with increasing doses and frequent monitoring of calcium-phosphate metabolism and renal function parameters.

Adult↗
PubMedDate not supplied

[Evaluation of the effect of d,l-carnitine on lipid metabolism of patients after prolonged dialysis].

An effect of carnitine (Bicarnesine) on lipid metabolism in 14 patients treated with prolonged dialyses has been analysed. Carnitine has been administered orally in the dose of 30 mg/kg b.w. three times per week for 8 weeks and every day for the next 8 weeks. Carnitine, total triglycerides, total and HDL cholesterol, and glucose have been determined in serum. Blood lipoproteins have been assayed with electrophoresis in agarose gel. Total and free carnitine concentrations increased by 3.5 times within 16 weeks. Triglycerides level did not change significantly in all examined patients except a group of 6 patients with baseline hypertriglyceridemia, in which a significant but transient decrease in triglycerides level has been noted after 4 weeks of treatment. At the same time, normalization of blood lipoproteins has been observed. In the eighth week, a transient decrease in HDL-cholesterol has been noted. Result suggest, that carnitine despite an increase in total and free carnitine blood levels did not regulate lipid metabolism disorders. Moreover, its administration to patients treated with prolonged dialyses seems to be unfavourable due to several adverse reactions.

Adult↗
PubMedDate not supplied

[Bacterial colonization of patients treated with chronic hemodialysis].

The study was aimed at investigating the predispositions of the patients chronically treated with hemodialysis to nose and skin colonization with potentially pathogenic bacteria. The study involved 41 patients chronically hemodialysed and patients treated at the Department of Renal diseases or out-patient clinic (30 individuals). Smears from the nose and throat were taken from all patients and used for bacteriologic tests. In case of hemodialysed patients material for bacteriologic tests was additionally taken from the skin at the site of arterio-venous fistula and groin. It was found, that patients chronically treated with hemodialyses are more frequently colonized with enteric bacilli and coagulase-positive staphylococci that both hospitalized patients and those treated in out-patient clinic. No relationship between the presence of coagulase-positive staphylococci in the nose and throat and on the skin was seen despite such suggestions of other authors.

Follow-Up Studies↗
PubMedDate not supplied

[Retrospective studies of urinary infections in the elderly].

Retrospective analysis of the urinary infection course involved 55 elderly patients. The patients were divided into groups basing on the clinical diagnosis. These groups included patients with obstructive chronic pyelonephritis and the patients with lower urinary infections. It was found that reinfections occur in the elderly patients with both upper and lower urinary infections while recurrence is seen in case of the upper urinary infections. Bacteriuria is significantly more frequent in the obstructive chronic pyelonephritis than in other urinary infections. This form of bacteriuria is frequently accompanied by exacerbations than in bacteriuria of periodic origin. Arterial blood hypertension is frequent in the elderly with urinary infections but its incidence does not correlate with the localization of the infection. Decompensated renal failure in the course of the urinary infections in the elderly is nearly always combined with arterial blood hypertension.

Aged↗