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Biomedical subjects

A Neumayr

Publications and source records attributed to A Neumayr.

At least 55 records · Page 3Linked to original sources
PubMed1976

[First clinical experiences with scintiphotosplenoportography].

This paper reports on the clinical applicability and efficiency of Scintiphotosplenoportography (SPSP) by means of 99mTc Pertechnetate. This diagnostic process permits obtaining the following data: actual route and patency of the portal vein, localizing of collaterals, as well as information on the actual speed of portal flow. By determining the time of transit of the radionuclid via the collateral pathways into systemic circulation, additional assessments as to the hemodynamic functional importance of these collaterals can be made. This process is of particular value for the speedy assessment of the patency of a surgically effected portocaval shunt in cases of shunt-bleeders. In patients without cirrhosis, a stop in the filling along the course of the portal vein indicates portal thrombosis. In cases of manifest cirrhosis, however, the lack of an SPSP image for the proximal portal vein and the liver itself, merely points to the existence of extensive caudal collaterals. Traumatization as the result of intrasplenal application of a volume of less than 1 ml (of tracer) remains minimal. In contrast with radiological splenoportography this methods entails practically no risks. However, as a result of the restricted field of view and the relatively coarse power of resolution, the quality obtainable by szintiphotosplenoportography is somewhat inferior to that of X-ray splenoportography.

Aged↗
PubMed1975

[The simultaneous investigation of liver and kidney function in the presence of dopamine (author's transl)].

The effect of dopamine on liver function and on renal blood flow and the glomerular filtration rate was studied in 13 patients suffering from liver cirrhosis. Hence, the BSP retention and 131I BSP clearance was determined and also the clearance of 99mTc DTPA and of 125I hippuran in decreasing concentrations, as well as under steady state conditions. Methodological problems arising from the application of the slope clearance technique in cirrhotic patients are discussed. Dopamine did not affect the BSP clearance and BSP retention, but a significant increase in renal plasma flow was observed. The glomerular filtration rate was not significant altered.

Adult↗
PubMed1975

[Effect of dopamine on the portal pressure].

1. An infusion of 3 gamma/kg/min dopamine causes a significant increase in the renal plasma flow and the glomerulum filtration rate. This dosage does not cause a change of the mean systolic and arterial pressure. This effect may also be observed in patients with hepatic cirrhosis. 2. The wedged hepatic vein pressure, an indicator for the portal pressure, only shows a slight increase (9,46 +/- 9,41%) as compared to the initial pressure produced by the mentioned dose. Measurements of the spleen pulpa pressure, which likewise indicates the portal pressure, showed an increase of pressure up to 100% due to pressing or coughing. 3. If in the case of bleeding oesophageal varices acute renal failure might develop, the advantage of the effect of dopamine in stimulating the blood flow through the kidneys may be considered more important than the minute danger of a slight increase of the portal pressure, which might provoke haemorrhage.

Adult↗
PubMed1972

[Peptic ulcer].

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Animals↗