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Biomedical subjects

V Schulz

Publications and source records attributed to V Schulz.

At least 109 records · Page 6Linked to original sources
PubMed1983

[Resorption of hydrocyanic acid from linseed].

Resorption of hydrocyanic acid after ingestion of linseed was investigated in 20 healthy volunteers and 5 patients. The persons investigated took a single dose of 30 g or of 100 g of linseed or they received throughout several weeks 15 g. t.i.d. One volunteer also took for purposes of comparison bitter almonds or potassium cyanide. Before, during and after the periods of ingestion plasma levels of hydrocyanic acid and of thiocyanate were normal. During long-term trials urinary excretion of thiocyanate was monitored regularly. Intake of linseed even in extremely high dosages never caused significant rises of plasma thiocyanate levels; this, however, was the case after intake of bitter almonds or potassium cyanide. Thus, it can be excluded, that intoxication by hydrocyanic acid can be caused by linseed. Long-term intake of linseed however, raised plasma levels of thiocyanate significantly; at the same time urinary excretion of thiocyanate increased.

Adult↗
PubMed1982

Cyanide toxicity of sodium nitroprusside in therapeutic use with and without sodium thiosulphate.

Sodium nitroprusside (SNP) as a mono-infusion was administered to 51 patients for periods of a few hours. A further group of 19 patients received SNP for periods of several days as a combination solution of SNP mixed with sodium thiosulphate. The concentrations of cyanide and of thiocyanate in the blood of all patients were measured. In seven of the patients the level of thiosulphate was also measured. Infusion of SNP on its own at levels exceeding 2 microgram/kg/min led to the rising of cyanide levels in the blood being proportional to dosage. Infusion of SNP mixed with thiosulphate showed no such accumulation of cyanide in any patient, irrespective of dosage level and duration. The efficacy at lowering blood pressure was fully maintained in the mixed infusion. The elimination half-life for thiosulphate was 16.5 min. Pharmacokinetic calculation of the rise in cyanide level showed that mono-infusions of 5-10 micrograms SNP/kg/min could within 5-10 h cause a life-threatening cyanide level in the blood. By contrast, mixed infusion of SNP together with thiosulphate, for which light-opaque syringes and tubing must be used, is a procedure free of danger and should become the technique of choice when therapeutically administering SNP in order to lower blood pressure.

Adolescent↗
PubMed1982

Detoxification of cyanide in a new-born child.

A well-developed male baby was given infusions of 2-5 microgram/kg/min of sodium nitroprusside (SNP) in the first few days after birth on account of high arterial blood pressure. After 30 h of treatment, cyanide accumulation was found to have reached a life-threatening level. IV administration of 100 mg/kg of sodium thiosulphate promptly lowered the cyanide level. The mixed infusion of SNP together with thiosulphate, used in the subsequent course, was no longer toxic.

Antidotes↗
PubMed1981

[Management of treatment-resistant hypertension: comparison of the antihypertensive effect of endralazine and minoxidil (author's transl)].

In 16 fo 20 patients with treatment-resistant hypertension endralazine, combined with beta-receptor blockers and diuretics, significantly lowered mean arterial blood pressure from 198/112 mmHg to 148/88 mmHg. The initial dose of endralazine was 2.5 mg three times daily. After this the dosage was increased, at the three to six-day intervals according to antihypertensive action and side effects, to a maximum of 50 mg daily in steps of 5.0--7.5 mg per dose. - In a second series of eleven additional patients with treatment-resistant renal hypertension the blood-pressure lowering effect of hydralazine and minoxidil was compared in an open cross-over trial. The result was in favour of hydralazine. Sodium and water retention was slightly less marked with endralazine. Sleep disorders, increased frequency of feeling cold, moderately severe flushing with red checks and feeling hot occurred but rarely with endralazine and regressed during the period of observation.

Adolescent↗
PubMed1980

Cytometric investigations in histochemically identified neurons--changes of fluorescence intensities and nuclear diameters in dopamine neurons of the arcuate nucleus in the cycling rat.

The relative formaldehyde-induced fluorescence intensities and the diameter of cell nuclei of fluorescent perikarya of the arcuate nucleus were recorded in serial cross-sectioned hypothalamic arcuate nuclei of regularly cycling rats (5 estrous and 4 proestrous animals). Stress-induced changes of cytometric parameters were avoided by preadaptation of animals to handling procedures. Dopamine neurons in a 75 micrometer thick periventricular layer of the arcuate nucleus exhibited significantly smaller nerve cell nuclei and significantly reduced relative fluorescence intensities in proestrous rats. Both of these cytometric parameters indicate a decrease in the activity of periventricular dopamine neurons of the arcuate nucleus. The reported findings might support the hypothesis that dopamine inhibits the release of LH-RH.

Animals↗