PubMed Health⌕ Search

Biomedical subjects

S Tamaş

Publications and source records attributed to S Tamaş.

9 recordsLinked to original sources
PubMed1991

[The determination by computed scintigraphy of the evacuation time of the resected stomach under the administration of salbutamol and dopamine].

The evacuation time (T1/2) of the stomach was determined in the patients with partial gastric resection by a sequential computerized scintigraphic method. The effect of Salbutamol and Dopamine was followed on T1/2 and the scintigraphic surface of the stomach (appreciated indirectly by measuring the longitudinal and transversal diameters). Salbutamol prolongs significantly T1/2, from 6.41 +/- 2.72 minutes to 12.33 +/- 6.45 minutes. The scintigraphic surface of the resected stomach is not slightly modified by Salbutamol. Dopamine prolongs very much T1/2, from 13.00 +/- 4.01 minutes to 75.03 +/- 24.36 minutes, in parallel with the increase of the scintigraphic image of the stomach. Our investigations lead to the conclusion that Salbutamol, given per os, may become a new therapeutic mean in the dumping syndrome.

Albuterol↗
PubMedDate not supplied

The clearance of colloidal particles by Kupffer cells in collagen disease.

The Kupffer cells clearance of colloidal 198Au particles with a diameter of 200-300 A was estimated in 14 subjects with different collagen diseases: 7 without previous treatment and 7 under immunodepressive treatment compared to 10 controls. No difference between the subjects with collagen disease and controls was observed. The group with collagen disease under immunodepressive treatment has lower Kupffer cells clearance for colloidal gold particles than non-treated patients, without statistical significance.

Adult↗
PubMedDate not supplied

Liver blood flow (LBF) estimated by Kupffer cells clearance in health and disease.

Liver blood flow (LBF) in normal state and in diseases suspected to impair liver perfusion has been estimated by an indirect method, based on the removal by Kupffer cells of the colloidal particles from the circulation. 150 microCl 198Au have been used and the results have been expressed through percentual decrease from the theoretical value. In chronic liver disease there is a progressive reduction of the Kupffer cells clearance and of the LBF corresponding to the severity of the liver impairment. There is a mild decrease in LBF in heart failure. In liver tumours and collagenoses, the values are like in normals.

Adult↗
PubMedDate not supplied

The gastric 99mTc clearance--a technique for the evaluation of the gastric blood flow.

The gastric mucosa blood flow was investigated using the 99mTc clearance. Besides the clearance the "R" ratio, total radioactivity of the gastric juice and the volume of gastric juice (ml/15 min) were also investigated. The main characteristics of the method are its reproducibility and the parallelism existing between: clearance, the "R" ratio and total radioactivity. The parameters investigated reach a maximum 30-45 min after administration of 99mTc; consequently, to evaluate gastric blood flow, it is sufficient to determine the parameters at this time interval. The 99mTc clearance represents an accessible method for the evaluation blood circulation in the gastric mucosa.

Adult↗
PubMedDate not supplied

Delayed gastric emptying in rx-negative dyspepsia.

In 9 out of 11 subjects with upper digestive dyspepsia: pyrosis, nausea, emesis, bloating, with negative roentgenological findings, a radioisotopic test detected a delayed gastric emptying. The investigation was based on a 500 ml saline meal including lmCi (3.7 MBq) 113m In-DTPA. For the sequential detection of the radioactivity in front of the epigastric area a gammacamera was used. This was linked to a microcomputer processing the histograms of the curves and estimating the half-time of the gastric emptying (normal value 8-25 min). The results suggest the need for prokinetic drugs in the management of symptoms due to functional pathology.

Adult↗
PubMedDate not supplied

Gastric sequential scintigraphy. Methodology with liquid isotonic meal.

The radioisotopic measurement of gastric emptying offers information about an aspect of gastric motility. A procedure performed in our laboratory is presented. It is based on the ingestion of 500 ml saline including 1 mCi (3.7 MBq)113m In-DTPA or 99Tc-DTPA. The subject is placed in a half-supine position. Radioactive counts of the tracer are collected with a gammacamera and processed with a microcomputer, using a special program. This offers the histograms of the whole stomach and of the regions of interest (proximal and distal stomach), and also the half-time of these curves. Normal values range between 8-25 min for each curve half-time. The method has applications in physiology, pharmacology and clinical diagnosis.

Gastric Emptying↗
PubMedDate not supplied

Colchicine treatment effects on liver cirrhosis assessed by liver blood flow measurements.

Hepatic fibrosis is common in all chronic liver diseases. This fibrosis induces morphological, functional and hemodynamic changes. Among the antifibrotic drugs, colchicine gave the most encouraging results. In a group of 22 patients with liver cirrhosis, the hemodynamic changes were studied before and after 24 months of antifibrotic treatment with colchicine (1 mg daily, 5 days a week). The liver blood flow (LBF) was estimated every year by a noninvasive radioisotopic method. After colchicine therapy the determinations showed, an obvious improvement of the liver blood flow with an increase of K (from 0.159 to 0.1678) (p less than 0.001) and a per cent decrease of delta from 44 to 32 (p less than 0.001), thus showing an improvement of the liver blood supply. The simultaneous and favourable changes of the liver biochemical tests and of the sinusoidal hemodynamic parameters strongly suggest that the perfusion improvement, induced by a loss of liver collagen, might explain the tendency of the biochemical data to resume normal values.

Adult↗