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Biomedical subjects

A Larcan

Publications and source records attributed to A Larcan.

At least 289 records · Page 16Linked to original sources
PubMedDate not supplied

Selenium, oxygen-derived free radicals, and ischemia-reperfusion injury. An experimental study in the rat.

Circulatory shock and its treatment have been compared to a whole-body ischemia and reperfusion with activation of oxygen-derived free radicals. A pilot study had suggested a selenium redistribution in this context. To verify this hypothesis, an experimental study was designed. Temporary occlusion of the superior mesenteric artery was performed in 18 male adult Wistar rats using clamping for 0, 10, and 20 min. Hemodynamic and biochemical data were assessed before clamping and 20 min after release of the mesenteric blood flow. After release, mean arterial pressure decreased, plasma lactate increased, and erythrocyte glutathione peroxidase decreased. Plasma and erythrocyte selenium did not change; however, a slight decrease in plasma selenium was observed when related to hematocrit (to take into account the fluid balance). Erythrocyte-reduced glutathione did not change. In contrast, liver and kidney selenium increased, whereas reduced glutathione decreased in kidney, but not in liver after 20 min of clamping as compared to the sham-operated group. These results suggest that, after temporary intestinal ischemia, the changes in selenium and reduced glutathione observed in blood and tissues, like liver or kidney, could be related to a redistribution pattern in selenium metabolism during shock injury.

Animals↗
PubMedDate not supplied

[Postoperative pulmonary embolism].

Post-operative thrombo-embolic disease remains a frequent occurrence in spite of advances in their prophylaxis. Evaluation of 60 case-reports of this disease which often includes peripheral manifestations and always pulmonary manifestations, enables to specify the role of the procedure itself (mostly orthopaedic surgery 60%), pelvic surgery 20%, the chronology of events (possibility of early embolism between D1 and D3 and usual occurrence of manifestations between D8 and D18, and the importance of the background, whether investigated or not: deficiencies in anti-thrombin III, protein C and S: 4 cases. The diagnosis is based on clinical signs (non-specific) and the laboratory tests, especially scintigraphy (screening) and angiography, absolutely necessary for the diagnosis and evaluation of the amputation coefficient (Miller index). With a diagnosis of pulmonary embolism, it is always necessary to look for a proximal venous thrombosis. The treatment, calls for heparin (quite seldom), thrombolytics (Urokinase, Plasminogen in our experience), the indication of which must take into consideration the delays and the nature of the previous procedure, and finally surgery (massive forms where thrombolytics are contraindicated). The thrombo-embolic manifestations with thrombogenic thrombopenia secondary to heparin are quite frequent, in a surgical environment (10 cases) and difficult to treat.

Humans↗
PubMedDate not supplied

[Uremic-hemolytic syndrome occurring in extra-uterine pregnancy. Apropos of a case].

One case of uremic-haemolytic syndrome associated with an ectopic pregnancy is reported. The main signs are, from the clinical standpoint, a diffuse haemorrhagic syndrome and, from the biological standpoint, a haemolytic anemia, renal failure and thrombopenia. This pathology, exceptionally associated with an early pregnancy, required an intensive resuscitation with blood transfusion, hemodialysis and plasma exchanges. From a surgical standpoint, two procedures were necessary following salpingectomy, to drain intraperitoneal and sub-aponeurotic blood collections. The course, thereafter, was uneventful.

Adult↗