6.1.1.3 Analytical Bias by Contamination from Hemolysis in Determination of Serum Lactate Dehydrogenase Isoenzyme 1 in Patients with Testis Germ Cell Tumors

Finn Edler von Eyben Departments of Clinical Chemistry, Odense University Hospital, Odense, Denmark; Radiotherapy and Oncology, Odense University Hospital, Odense, Denmark; Department of Clinical Biochemistry, Statens Seruminstitut, Copenhagen, Denmark

Per Hyltoft Petersen Departments of Clinical Chemistry, Odense University Hospital, Odense, Denmark; Radiotherapy and Oncology, Odense University Hospital, Odense, Denmark; Department of Clinical Biochemistry, Statens Seruminstitut, Copenhagen, Denmark

Ole Blaabjerg Departments of Clinical Chemistry, Odense University Hospital, Odense, Denmark; Radiotherapy and Oncology, Odense University Hospital, Odense, Denmark; Department of Clinical Biochemistry, Statens Seruminstitut, Copenhagen, Denmark

Ebbe Lindegaard Madsen Departments of Clinical Chemistry, Odense University Hospital, Odense, Denmark; Radiotherapy and Oncology, Odense University Hospital, Odense, Denmark; Department of Clinical Biochemistry, Statens Seruminstitut, Copenhagen, Denmark

Bent Nørgaard-Pedersen Departments of Clinical Chemistry, Odense University Hospital, Odense, Denmark; Radiotherapy and Oncology, Odense University Hospital, Odense, Denmark; Department of Clinical Biochemistry, Statens Seruminstitut, Copenhagen, Denmark

Jørgen Arends Departments of Clinical Chemistry, Odense University Hospital, Odense, Denmark; Radiotherapy and Oncology, Odense University Hospital, Odense, Denmark; Department of Clinical Biochemistry, Statens Seruminstitut, Copenhagen, Denmark

Abstract

We investigated the impact of correction for contamination from hemolysis on serum lactate dehydrogenase isoenzyme 1 (S-LD-1) determinations. A study of hemolysates from 7 control patients showed a mean correction factor for the contamination of 0.1 U/L S-LD-1 for each 1 mg/L serum hemoglobin (S-Hb). S-LD-1 in a series of blood samples from 44 patients (EJC 1992;28:410–5) would decrease median 24 U/L (range 8–70 U/L) if the measurements were corrected with this factor. So we advice to correct S-LD-1 determinations for the contamination with a common correction based on the S-Hb concentrations in the samples.

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6.1.1.3 Analytical Bias by Contamination from Hemolysis in Determination of Serum Lactate Dehydrogenase Isoenzyme 1 in Patients with Testis Germ Cell Tumors

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6.1.1.3 Analytical Bias by Contamination from Hemolysis in Determination of Serum Lactate Dehydrogenase Isoenzyme 1 in Patients with Testis Germ Cell Tumors

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