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Biomedical subjects

J D Schnatz

Publications and source records attributed to J D Schnatz.

At least 19 recordsLinked to original sources
PubMed1979

A simple method for the intravenous fat-tolerance test.

A simple method for measuring intravenous fat tolerance with an artificial fat emulsion (intralipid) was studied and compared with the currently used method of Carlson and Rossner [J. Lab. Invest. 29, 271-280 (1972)]. The proposed method uses as little as 3 mL of whole blood to follow, by nephelometry, the elimination of intravenously administered fat emulsions. There is a high correlation between the K2 values obtained by the current method for plasma and those obtained by the proposed method (r = 0.903). The latter is simpler, quicker, and more acceptable to patients.

Adult↗
PubMed1978

Hyperlipidemia in a Lebanese community: difficulties in definition, diagnosis and decision on when to treat.

Fasting serum cholesterol and triglyceride levels were measured in 131 randomly selected adult members of a Lebanese Community of Western New York. Mean cholesterol levels (males, 217 mg%; females 234 mg%) were higher than those reported from the Lebanon but similar to those reported in most other populations. Mean triglyceride levels (males, 153 mg%; females, 115 mg%) were higher than those reported in most other populations. Twenty-three subjects were hyperlipidemic on the basis of age and frequency distribution adjusted serum lipid levels above the 90th percentile. Clinical and family studies carried out on 13 of these 23 hyperlipidemic subjects suggested that 77% had monogenic hyperlipidemia and 23% primary non-monogenic hyperlipidemia. A high frequency of familial hypercholesterolemia (minimum estimate 0.7%) was found, in keeping with the high frequency of the disorder in Lebanon. The study serves to emphasize the difficulties in defining hyperlipidemia, in establishing a specific diagnosis in the individual patient, and in distinguishing between optimum and normal serum lipid levels.

Adult↗
PubMed1978

Treatment of hyperinsulinism after partial pancreatectomy: medical or surgical?

A 21 year old male patient with hypoglycemia secondary to hyperinsulinism had no palpable adenoma at surgery, and failed to respond to a partial (75%) pancreatectomy. Subsequently, he was begun on oral Diazoxide. Soon after initiation of Diazoxide he developed a viral pneumonitis, and because of hyperglycemia, the Diazoxide was temporarily discontinued. He has been treated since June of 1975 with Diazoxide, 100 mg, three times daily. He is asymptomatic, completely rehabilitated, and physically active at work for 10 hours daily. Diazoxide therapy may be an option worth considering even in benign states of hyperinsulinism when surgery has failed to correct the process.

Adult↗
PubMed1976

Genetic variation of lysosomal acid lipase.

Lysosomal acid lipase (LAL) activity was measured using a new fluorometric assay in cultured skin fibroblasts from eight control subjects, two obligate heterozygotes for Wolman's disease (WD), one patient with WD, and one patient with cholesteryl ester storage disease (CESD). The LAL activities (mean+/-SD) were 25.8+/-8.2, 13.2+/-0.1,1.1, and 1.4 nmol 4-methylumbelliferyl oleate (4-MUO) hydrolyzed/min/mg protein, respectively. These results compare favorably with those obtained using standard radioassays. The LAL activities of two cultures of amniotic fluid cells were 12.1 and 10.5. The LAL activity (mean+/-SD) of peripheral leukocytes obtained from 34 laboratory volunteers (19 females, 15 males) was 4.0+/-1.8. Partially purified lymphocytes contained about 25 times as much LAL activity as did granulocytes. Cellogel electrophoresis, followed by staining with 4-MUO, showed at least two bands of LAL (A and B) from normal fibroblasts, amniotic fluid cells, and lymphocytes. Band A was absent from WD and CESD fibroblasts and was reduced in fibroblasts of the WD heterozygotes.

Cholesterol Esters↗