Search results for "Diuresis"

Time course of development of transtubular sodium concentration differences in proximal surface tubules of the rat kidney. Micropuncture experiments …

1969

Int the proximal and distal surface tubules isotonic Na reabsorption (Φ Naout) is impaired by adrenalectomy. In the present experiments the time course of development of transtubular Na concentration differences (Na)P−(Na)TF was studied in the proximal convolution. 1. Na concentration was measured in free flow mannitol diuresis. Endproximal (Na)P−(Na)TF averaged 23.0±0.5 meq/l after 8.5±0.6 sec (controls) and 15.2±1.7 meq/l after 13.6±0.5 sec (adrenalectomized rats). 2. In modified stopped flow experiments tubular fluid, aspirated at the beginning of the proximal convolution in mannitol diuresis, was injected between two oil columnes and reaspirated after 28–36 sec of contact time. (Na)P−(N…

Der Tag-Nacht-Rhythmus der Diurese, Elektrolytausscheidung und Clearance des echten endogenen Kreatinins bei der Ratte

1956

Die diuretische Wirkung von Oxytocin beim Hund

1959

The influence of a synthetic oxytocin preparation and of prednisolone hemisuccinate on the renal excretions of water, sodium, potassium and chloride and on the clearance of endogenous true creatinine was studied in 18 dogs anesthetized with hexobarbital and barbital. The animals were deprived of food and water for 12 hours before the experiments.

Ver�nderungen der Form der Tubuli und des Wassergehalts der Nieren bei der Mannit- und Sulfatdiurese der Ratte

1958

Der Einflu� von nat�rlichem und synthetischem Oxytocin auf endogene Kreatinin-Clearance, Salzausscheidung und S�ureausscheidungsf�higkeit der Ratte u…

1957

Die renale Elektrolytausscheidung normaler und adrenalektomierter Ratten nach intraven�sen Salzinjektionen und ihre Beeinflussung durch Corticosteroi…

1959

Groups of normal rats of both sexes in moderate water diuresis received i.v. injections of 5 ml./kg, of hypertonic (5 times isoosmotic) solutions of sodium chloride, mannitol er sodium sulfate. The renal excretion of water, sodium, chloride and potassium in a 30 minute-period following this injection was measured. It was compared to control values obtained 40 minutes earlier in the same animals after an i.v. injection of isotonic glucose solution. All hypertonic solutions increased diuresis, natriuresis, chloruresis and kaliuresis. While the effects of mannitol and sodium chloride were comparable, sodium sulfate was more natriuretic and less chloruretic. The excretion of potassium after inj…

Die renale S�ure- und Ammonium-Ionen-Ausscheidung normaler und adrenalektomierter Ratten und ihre Beeinflussung durch Nebennierenrindenhormone

1959

The renal excretion of acid and ammonium ions after an oral load of monosodium-phosphate (1.2 mEq. per rat) was studied in groups of adrenalectomized er sham-operated rats, maintained on 0.9 per cent NaCI solution and water, on the 6th or 12th day after operation. Untreated groups were compared to groups receiving either Corticotropin (25 U./kg./day s.c.) or Cortisone acetate (12.5 mg./kg./day s.c.) er (7.5 mg./kg./day s.c.) or D,L-Aldosterone acetate Cortexone acetate (0.15 mg./kg./day s.c.) from the 3rd to the 12th day after opetarion. In sham-operated rats Cortisone increased H+ excretion and diuresis on the 6th day after operation (3rd day of treatment). This influence did not persist o…

Aufnahme und renale Ausscheidung von Wasser und Salzen bei freiem Nahrungs- und Trinkfl�ssigkeitsangebot; ihre Beeinflussung durch Adrenalektomie und…

1959

Water, sodium, potassium and chloride balances, food uptake and changes in body weight were determined in large groups of adrenalectomized or sham-operated rats having permanent access to water, 0.9 per cent saline and rat crackers. Measurements were done on the 5th to 8th day, or else on the 11th to 14th day after operation. From the 3rd day after operation the animals either received s.c. injections of 2.0 ml./kg. 0.9 per cent NaCl per day (controls) or of one of the following hormones: Corticotropin (25 U/kg. b.w./day), Cortisone acetate (12.5mg./kg./day), Cortexone acetate (7.5mg./kg./day) or D,L-Aldosterone acetate (0.15 mg./kg./day). Besides electrolyte balances, plasma concentrations…

Die Diurese der Maus nach oraler Gabe von Wasser oder NaCl-L�sungen und ihre Beeinflussung durch Hypophysenhinterlappenhormone

1959

Nebennieren undrenale Oxytocin-Wirkungen bei der Ratte

1959

No significant improvement in water diuresis was obtained by the s. c. injection of 500–1000 mU/kg of a synthetic oxytocin preparation (Syntocinon) in adrenalectomized, salt-maintained rats given 18 ml of water per rat by stomach tube. In these animals oxytocin had, on the other hand, a strong natriuretic and chloruretic effect.