Accurate measuring of daily insulin doses: aids for the blind diabetic.
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Biomedical subjects
Publications and source records attributed to M S Kappy.
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Twenty-five episodes of diabetic ketoacidosis in 20 children were treated with continuous low-dose intravenous insulin infusion. Stable serum immunoreactive insulin concentrations were produced, along with prompt falls in glucose, beta-hydroxybutyrate, and glucagon levels, and a steadily increasing bicarbonate level. Neither hypokalemia nor hypophosphatemia developed. Elevated serum alanine concentrations were found during ketoacidosis in contrast to the lowered concentrations found in adults, and were correlated inversely with plasma glucagon concentrations. The treatment regimen described is safe, easy to use, efficacious, and resulted in prompt correction of the observed biochemical alterations in children with diabetic ketoacidosis.
A regimen is described to simplify current methods of ketoacidosis therapy by using only standard intravenous equipment and without requiring albumin administration. After an initial intravenous insulin bolus of 2 units, a dose of up to 3 units per hour was sufficient to bring patients out of ketoacidosis. No hypoglycemia, significant hypokalemia, or rapid fall in serum osmolality was detected. Patients showed steady increases in endogenous bicarbonate and were out of metabolic acidosis in 8.4 hours. This modified regimen appears to be a safe and easy method of treating diabetic ketoacidosis in children and is suited for use in community hospitals. Since the method is described for children over the age of three or those not in severe coma, consultation should be sought for any infant and for any child in severe coma or with a significant complication, such as severe infection.
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A temperature-conditional lethal mutant of Neurospora crassa, un-t (55701), was resistant to neutral amino acid analogues by virtue of a decreased ability to transport these analogues and their natural congeners across the cell membrane. The uptake of acidic, but not basic, amino acids was also impaired, as was the uptake of potassium ions. After preincubation above the tolerated temperature, the ability to take up a still wider variety of metabolites was greatly reduced. Protoplasts of the mutant were more osmotically fragile than those of wild type. The possibility that the mutant has a generalized membrane defect is discussed.
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