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Biomedical subjects

G Slama

Publications and source records attributed to G Slama.

At least 145 records · Page 8Linked to original sources
PubMed1989

Ketone bodies do not give falsely positive alcohol tests.

Ketosis, as observed in diabetic ketoacidosis or secondary to hypoglycaemia, may be associated with symptoms resembling those of acute alcoholism. It is thus essential to rule out the possibility that ketone bodies cross-react with any method of ethanol determination. Two currently used methods for detecting ethanol in the expired air (Alcotest and a fuel cell electrode), and three methods for blood determination (the nitrochromic method, gas liquid chromatography, and the TDX-REA method) were examined. No cross-reaction was found in nine grossly ketotic diabetic subjects. In vitro 3-hydroxybutyrate, acetoacetate or acetone, alone (30 mmol l-1) or in association, did not cross-react in the assays studied.

Chromatography, Gas↗
PubMed1989

Correlation between amount of carbohydrate in mixed meals and insulin delivery by artificial pancreas in seven IDDM subjects.

The effects of mixed meals containing varying amounts of carbohydrate (CHO) on blood glucose levels and insulin delivery by an artificial pancreas were studied in seven insulin-dependent diabetes mellitus subjects. Each patient received, at random over 3 consecutive days, three mixed meals containing 60, 80, and 140 g complex CHOs. There was a high and linear correlation between total amount of insulin delivered to restore blood glucose values and amount of CHO consumed: 12.1 +/- 1.3 to 31.2 +/- 5.2 U insulin were needed for 116 +/- 16 to 198 +/- 24 min. However, neither the time lapse between the beginning of meal intake and blood glucose increase nor the peaking time for blood glucose variation were significantly different between meals. We suggest that some of the data obtained in this study might be useful in programming an open-loop insulin-infusion system.

Adult↗
PubMed1988

Effect of intranasal glucagon on blood glucose levels in healthy subjects and hypoglycaemic patients with insulin-dependent diabetes.

Glucagon in solution with a surfactant (deoxycholic acid 1% w/v) was administered by intranasal spray to 6 healthy fasting subjects and 6 insulin-dependent diabetics with insulin-induced hypoglycaemia. In the normal subjects, intranasal glucagon increased plasma glucose levels, with a dose-response effect. In the diabetic patients, plasma glucose levels showed a mean increase of 100% above nadir values in approximately 26 min in response to 7.5 mg intranasal glucagon; hypoglycaemic symptoms were relieved within about 7 min. These results suggest that intranasal glucagon is effective and may represent an alternative to parenteral glucagon or glucose or to oral sugar as the first-line treatment of hypoglycaemic episodes in insulin-dependent diabetics.

Administration, Intranasal↗
PubMed1987

Insulinemic and glycemic indexes of six starch-rich foods taken alone and in a mixed meal by type 2 diabetics.

The glycemic index concept neglects the insulin secretion factor and has not been systematically studied during mixed meals. Six starch-rich foods were tested alone and in an isoglucido-lipido-protidic meal in 18 NIDDs and compared with a glucose challenge. These test meals were randomly assigned using a three factor experiment design. All three tests contained 50 g carbohydrate; mixed meals were adjusted to bring the same amount of fat (20 g), protein (24 g), water (300 mL), and calories (475 kcal) but not the same amount of fiber. Whatever the tested meals, foods elicited a growing glycemic index hierarchy from beans to lentils, rice, spaghetti, potato, and bread (mean range: 0.21 +/- 0.12-92 +/- 0.12, p less than 0.001). Mixing the meals significantly increased the insulinemic indexes (p less than 0.05) and introduced a positive correlation between glycemic and insulinemic indexes (n = 6, r = 0.903; p less than 0.05). The glycemic index concept remains discriminating, even in the context of an iso-glucido-lipido-protidic meal. Insulinemic indexes do not improve discrimination between foods taken alone in type 2 diabetics: they only discriminate between foods during mixed meals, similarly to glycemic indexes.

Adult↗
PubMed1987

Lifestyle, metabolic control and social implications of pump therapy in 54 routine type I diabetic patients.

Our aims were to evaluate the clinical and social implications of continuous subcutaneous insulin infusion (CSII) in ordinary type 1 diabetics, followed on a routine basis using a simple (Mill Hill) or a more complex (Microject MC20, Ames) pump. Fifty four type 1 diabetics were studied during 2 randomized periods of 4 months, one of conventional treatment (CT) (2 to 3 injections/day, self blood glucose (BG) monitoring) and the other of CSII. Each period was preceded by a 5 day training course. We studied clinical parameters, metabolic control (daily values of BG strips, urine analysis, insulin reactions, HbA1c), and acceptability of the treatment to the patient and their relatives. We also recorded all their unexpected phone-calls, consultations and admission to hospital. Thirty-four patients the initial cohort, completed the study, 7 dropped-out, 9 interrupted CSII, mainly because of skin problems and 4 refused to revert back to CT. During CSII, patients noted slight disturbance of sleep (30%), sexual activity (68%), and the wearing of clothes (26%). The main concern was with moderate skin problems (71%) whereas the main advantages were dietary liberalization, reduced numbers of insulin reactions and an improved feeling of well being. The type of pump used did not affect the results. Though acceptability was good in every patient trying the pump, it was better in those who asked to keep the pump after the trial (p less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1986

Effects of metformin treatment on erythrocyte insulin binding in normal weight subjects, in obese non diabetic subjects, in type 1 and type 2 diabetic patients.

We have evaluated the effects of metformin administration on erythrocyte insulin receptors in 21 subjects: 5 normal weight subjects, 5 obese non diabetics, 5 insulin-dependent diabetics (Type I) and 6 obese non insulin-dependent (Type II) diabetics. Plasma glucose, plasma insulin and erythrocyte insulin receptors were studied after 15 days of metformin (850 mg, t.d.) or placebo administered in a double blind random order. Maximum specific insulin binding to erythrocytes increased after metformin in the normals (p less than 0.01), in the obese non diabetics (p less than 0.01) and in the obese Type 2 diabetics (p less than 0.005), but not in Type I diabetics. Scatchard analysis showed that the receptor number per cell increased by 37% in the normals, by 17% in the obese non diabetics and by 182% in Type 2 diabetics. Receptor affinity increased in obese subjects but did not increase in normals and in diabetics. Only in Type II diabetics was there a significant decrease in plasma glucose. Metformin, thus, increased binding in normals by moderately increasing the capacity of cell receptors, in obese non diabetics by increasing the affinity, whereas in obese Type II diabetics it dramatically increases receptor capacity. This is consistent with the fact that metformin has a hypoglycaemic effect mainly in Type II diabetics, but not in non diabetics (whether obese or not), and could be due to a direct effect on the cell membrane.

Adult↗
PubMed1985

[Effect of clinical hyperthyroidism and hypothyroidism on patent diabetes. 59 cases].

Fifty-nine patients with both clinical evidence of thyroid dysfunction and patent diabetes mellitus were investigated in our diabetology department. Patients with euthyroid goitre and iatrogenic or pituitary hypothyroidism were excluded from the study. Among the 45 diabetics with hyperthyroidism, 32 had Graves' disease and 13 had toxic adenoma; 71% were insulin-treated. Hyperthyroidism had passed unnoticed in 7 of these 32 patients because fatigue and loss of weight, which initially were the predominant or sole symptoms, are extremely frequent in uncontrolled diabetes. These symptoms, as well as polyuria, polyphagia and even sweating are common to both diseases. Considerable deterioration in the control of glycaemia was observed in 63% of the insulin-treated patients when hyperthyroidism developed, with a 17 to 212% (mean 82%) increase in insulin dosage in 53%. There was no correlation between the degree of hyperthyroidism and the loss of control. Following treatment of the hyperthyroidism, control was improved in 63%, with an 11-83% (mean 44%) decrease in insulin dosage in 59% of them. Insulin therapy could be withdrawn in only one of the 32 insulin-treated patients. Non-iatrogenic primary hypothyroidism was found in 0.2% of the diabetics investigated. This incidence was significantly higher than the calculated probability of the two diseases occurring by chance in the same patient. Eleven out of 14 patients were insulin-treated. When hypothyroidism developed, 73% of them had their insulin dosage reduced, with a high frequency of hypoglycaemic disorders: repeated "malaise" in 55% and coma in 27%. A higher proportion of vitiligo was also noted: 14% in the total patient population reported, and 18% in insulin-treated patients.

Adult↗