Lower limb Portal veinsechography for predicting risk ofthrombosis during a 90-d Bed Rest

摘要

The objective was to investigaternthe main leg, Portal, Jugular veins, andrncardiac chambers during a long term headrndown bedrest (90 days). The populationrnconsisted of a control group (Co-gr, n=9)rnand an exercise Fly wheel counter-measurerngroup (CM-gr, n=9). Method:rnInternal Saphenous, Common/SuperficialrnFemoral, Popliteal, Posterior Tibial,rnGastrocnemian, Portal Jugular veins andrnCardiac chambers were investigated byrnechography. Results: The echographiesrnwere performed at HDBR day 28, 60 andrn85. All veins and cardiac chambers, on allrnsubjects showed a lumen dark (nornstructure inside) and were perfectlyrncompressible under the probe pressurernexcept cardiac chambers and Portal veinrnanatomically not compressible.rnConclusion: (a) There was no sign ofrnvenous flow stagnation nor venousrnthrombosis on any subjects at any timernduring the 90 days in bedrest. (b) Therernwas no difference between the control andrnthe exercise subjects ( c ) The Cardiacrnchambers were found normal but thernJugular veins were enlarged at the end ofrnthe HDBR.