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Biomedical subjects

C Colette

Publications and source records attributed to C Colette.

144 records · Page 8Linked to original sources

[Comparative study of 3 portasystemic shunts following 65% hepatectomy in the dog. Evaluation of 2 specific functions of the liver].

Three types of porto-systemic shunt were performed in the dog following 65% hepatectomy with the aim of determining the best porto-systemic shunt for the maintenance of hepatic function during regeneration of the liver: terminolateral portocaval shunt, mesenterico-caval shunt and spleno-pancreatico-caval shunt. The hepatic functions studied were the hydroxylation of vitamin D and proaccelerin synthesis. These functions were unaffected by the mesenterico-caval shunt whilst they were depressed to the same extent by both other types of shunt.

Animals↗

[Unrecognized hemorrhages during delivery].

On the basis of a series of 600 deliveries between January 1 and May 1 1993, the authors analyze cases of unrecognized delivery-related hemorrhage. Hemorrhage of this type, defined retrospectively on the basis of a difference of at least 3g/100 ml in hemoglobin levels at the time of admission to the labor ward and on the 2nd day post-partum, were found in 3.83% of deliveries and were responsible for 51.11% of falls in hemoglobin of 3g/100 ml or more. Primiparity, induced labor (oxytocics), episiotomy, forceps extractions and cesarean section are their etiologic factors. Particular care should be taken in the presence of any of these factors and induced labor may be useful in the prophylaxis of these unrecognized hemorrhages.

Adult↗

Relationships between serum lipids, platelet membrane fatty acid composition and platelet aggregation in type 2 diabetes mellitus.

In order to gain further insight into the mechanism of platelet dysfunction frequently reported in diabetes we investigated circulating fatty acids, lipid composition of platelet membrane and platelet function in Type 2 diabetic patients. In these subjects, percentages of C16 : 1n-7 and C18 : 1n-9 in serum phospholipid fraction and of C16 : 1n-7 in serum cholesterol ester fraction were decreased. Moreover, the content of C20 : 4n-6 in serum cholesterol esters was altered in Type 2 diabetic subjects: C18 : 0 and C20 : 3n-6 were increased but C20 : 4n-6 content was similar to controls. Aggregation in vitro did not differ from controls but aggregation in vivo was increased in Type 2 diabetic subjects. No correlation was observed between metabolic parameters -i.e., HbA1, blood glucose, serum triglycerides and total cholesterol, circulating fatty acids and fatty acid content of platelet membrane. A negative linear correlation was found between aggregation in vivo and C20 : 4n-6 content of platelet membrane. Moreover, a U shaped relationship was observed between platelet aggregation in vitro and C20 : 4n-6 content of platelet membrane suggesting that C20 : 4n-6 level should be tightly controlled otherwise platelet hyperreactivity may occur. These results indicate that despite a normal mean C20 : 4n-6 content in the platelet membrane, regulation of C20 : 4n-6 metabolism is less strictly controlled in Type 2 diabetes mellitus and confirm the importance of arachidonic acid platelet content in the regulation of platelet aggregability.

Adult↗

Effects of moderate changes in protein intake on urinary albumin excretion in type I diabetic patients.

We investigated the short-term effects of moderate increments or decrements of protein intake on albumin excretion rates of type I diabetic patients. Ten normotensive patients with either normal albumin excretion rates (< 20 micrograms/min, group I, n = 5) or persistent mu-albuminuria (20-200 micrograms/min, group II, n = 5) were fed successively three test diets providing different protein intakes. Each patient was randomly allocated to 3-wk sequences of the following diets: low-protein diet (LPD; median 0.84, range 0.76-0.94 g.kg-1.day-1), medium-protein diet (MPD; median 1.33, range 0.98-2.00 g.kg-1.day-1), and high-protein diet (HPD; median 2.05, range 1.54-2.61 g.kg-1.day-1). The three diets were isoenergetic and isoglucidic. In group I patients, no consistent change was found in mu-albuminuria. In group II patients, LPD resulted in a reduction in mu-albuminuria compared with MPD and HPD. Changes in albumin excretion rates were positively correlated to relative changes in protein intake. This suggests that moderately protein-restricted diets can reduce mu-albuminuria in diabetic patients suffering from incipient nephropathy, the degree of reduction depending on the degree of restriction. Because of poor patient compliance with protein intakes < 0.8 g.kg-1.day-1, we conclude that moderately rather than severely protein-restricted diets should be recommended for long-term prescriptions.

Adult↗

[Non-specific fetal infections: possibilities and value of early diagnosis].

Notes of 4,000 obstetric and neo-natal cases have been analysed. The role of non-specific fetal infection (which means excluding syphilis, toxoplasmosis and German measles) has been defined with the backing of histopathological, bacteriological and clinical findings. Its role in perinatal mortality and neo-natal morbidity has been outlined. Possibilities for prevention of the condition are suggested, dealing with premature rupture of the membranes and clear-cut maternal infection. "At risk of infection" is the term that has been defined for neonates by studying carefully obstetrical clinical parameters where they are isolated or associated with other conditions but relatively innocuous. When the condition has been defined in particular cases, intensive supervision of the children at risk must be carried out so that as a result of bacteriological findings therapy can be started earlier, better adjusted to the condition and promising a better prognosis.

Female↗