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Biomedical subjects

L Langevin

Publications and source records attributed to L Langevin.

7 recordsLinked to original sources
PubMed1998

[Management of hyperbilirubinemia of the term newborn in maternity wards].

Jaundice is a frequent clinical sign among healthy term newborns. A rigorous clinical assessment is crucial in order to recognise haemolytic, infectious and metabolic diseases. The use of the transcutaneous jaundice-meter in decision-making, and the phototherapy principles and applications, are discussed. Intensive phototherapy allows a rapid decrease in plasma bilirubin levels, so that it may used to treat even severe hyperbilirubinemia in the maternity ward.

Bilirubin↗
PubMed1987

Serum magnesium and potassium in acute myocardial infarction. Influence on ventricular arrhythmias.

Over a 13-month period, serum potassium and magnesium levels were measured in 590 patients admitted to a coronary care unit. Hypokalemia, often in the absence of diuretic use, occurred in 17% of the 211 patients with acute myocardial infarction. Patients with acute myocardial infarction and a potassium level of less than 4.0 mEq/L (4.0 mmol/L) had an increased risk of ventricular arrhythmias (59% vs 42%). Because hypokalemia is common in acute myocardial infarction and is associated with ventricular arrhythmias, routine measurement of serum potassium levels and prompt correction are recommended. Hypomagnesemia occurred in only 4% of the patients, but it was more common in the group with acute myocardial infarction than in the group without myocardial infarction (6% vs 3%). Ventricular arrhythmias occurred in ten of the 13 patients with both acute myocardial infarction and hypomagnesemia, but eight of these patients also had low serum potassium levels. This low incidence of hypomagnesemia does not justify routine measurement of serum magnesium levels. However, the mean level (2.5 +/- 0.4 mg/dL [1.03 +/- 0.16 mmol/L]) in a reference population of healthy volunteers was unexpectedly high and suggests that the low incidence of hypomagnesemia in our population may not be applicable to other centers and may reflect a higher magnesium content in our geographic area of southeastern Ontario.

Acute Disease↗
PubMed1975

[Hyperoxemia in extracorporeal circulation].

The authors demonstrate the effects of hyperoxemia in dogs subjected to extracorporeal circulation. Arterial Po2 was maintained between 100 and 140 mm Hg in a control group and above 200 mm Hg in another group. There was no morbidity or mortality in these experiments. Postoperative functional status as well as hematological and biochemical data were similar in both groups. However, free plasma hemoglobin was 50% higher in animals subjected to hyperoxygenation. It is thus concluded that on the basis of these results hyperoxygenation has no beneficial effect on the animals submitted to total body bypass and moreover that arterial Po2 over 200 mm Hg increases hemolysis.

Acid-Base Equilibrium↗