1966
DOI: 10.1159/000279457
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Resorption radioaktiv markierter Substanzen aus Harnblase und isolierter Dünndarmschlinge

Abstract: Mit Hilfe radioaktiv markierter Substanzen wurden Resorptionsmessungen aus der Harnblase und aus einer operativ ausgeschalteten Dünndarmschlinge beim Hund durchgeführt. Calcium und Phosphor werden innerhalb von 90 Minuten bis zu 90% aus dem Darm resorbiert, aus der Harnblase erfolgt keine meβbare Aufnahme. Eine Resorption von Inulin oder Paraaminohippursäure müβte falsche Clearancewerte vortäuschen. Inulin wurde weder aus dem Darm, noch aus der Blase resorbiert; anfangs hatte eine pH-abhängige Abspaltung des M… Show more

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“…It also might be that smaller molecular impurities crossed the urothelium. And urothelium cell swelling in conjunction with edema of the lamina propria after exposure to hypotonic fluids as a possible cause for the inulin leak has not been verified [28], Employing l3lI-chloryliodine-propylinulin, Strohmenger and Sack [26] found the canine bladder to be absolutely impermeable to this historical volume marker. Interestingly, inulin was reported to leak across the embryologically associa ble 'tight' epithelium lining the epididymal duct at a rate of 10%/h [29], In comparison to that, 19, 14 and 14%/h at the respective filling volumes of 0.3, 0.6 and 0.9 ml were calculated in this study.…”
Section: Discussionmentioning
confidence: 99%
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“…It also might be that smaller molecular impurities crossed the urothelium. And urothelium cell swelling in conjunction with edema of the lamina propria after exposure to hypotonic fluids as a possible cause for the inulin leak has not been verified [28], Employing l3lI-chloryliodine-propylinulin, Strohmenger and Sack [26] found the canine bladder to be absolutely impermeable to this historical volume marker. Interestingly, inulin was reported to leak across the embryologically associa ble 'tight' epithelium lining the epididymal duct at a rate of 10%/h [29], In comparison to that, 19, 14 and 14%/h at the respective filling volumes of 0.3, 0.6 and 0.9 ml were calculated in this study.…”
Section: Discussionmentioning
confidence: 99%
“…Differences in the extent of its influx between hypo-and hypertonic test fluids should shed some light onto the fourth question. quent ischemia of the bladder wall [3,26], This matter was first observed by Mehrotra [ 18] in 1953. Since blood capillaries lie directly below the urothelium, so that the blood plasma is only a few microns away from the blad der contents, an in vivo and in situ study has to be con cerned with mucosal hemodynamics as a second deter minant of the transurothelial water and solute fluxes [5].…”
mentioning
confidence: 99%