[Distribution kinetics of Au 198-colloid following intrathecal administration (proceedings)].
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Biomedical subjects
Publications and source records attributed to H Döge.
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Errors in the interpretation of bone scans with 99mTc-diphosphonate may be due to summation of radio-activity from superimposition of various bone structures. Lesions with increased bone turn-over as well as reactive hyperaemia result in increased uptake. The possibility of extraosseous uptake of diphosphonate must be borne in mind during the evaluation of bone scans. The kidneys and lower urinary tract must be considered. Absent or slight uptake by the kidneys with good demonstration of bone suggests increased diphosphonate uptake by the bones. Special attention should also be paid to zones of decreased uptake, since these are also due to abnormalities in the bone.
A new method is offered as an adjunct to radionuclide cisternography and the measuring of radioactivity in nasal pledgets. The activity in gastric juice following the intrathecal injection of Yb-169-DTPA is measured and the ratio of gastric juice to blood is calculated. In patients suffering from CSF rhinorrhea the ratios significantly exceed the normal range. This method can be used to detect CSF leakage at the back of the nasopharynx, and in patients with head injuries too severe to permit the use of nasal pledgets.
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The function of hepatic reticulo-endothelial system at normal circulation and during hemorrhagic shock was examined in 13 dogs. The results were as follows:1.198Au-colloid liver scintigraphy demonstrated no essential alterations by shock. A trifling diminution caused by the diminished blood amount in the liver was found at heavy blood loss. The spleen was opcified in no case. 2. The elimination rate, resp. the blood clearance, of 198Au-colloid remained constant during the first 2 hours, proving that the vital clearance function of hepatic reticulo-endothelial system is completely maintained in this phase of hemorrhagic shock. After longer duration of hypovolemic shock (5 hours) elimination rate decreased. 3. It can be concluded that hepatic circulation at first alters according to the blood volume. 4. Consequently, functional testing of hepatic reticulo-endothelial system is not fit for early diagnosis of shock.
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