TY - JOUR
T1 - Determination of myocardial and serum digoxin concentrations in children by specific and nonspecific assay methods
AU - Wagner, John G.
AU - Dick, Macdonald
AU - Behrendt, Douglas M.
AU - Lockwood, Graham F.
AU - Sakmar, Ermelinda
AU - Hees, Paul
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1983/5
Y1 - 1983/5
N2 - After obtaining samples at open heart surgery, serum and right atrial digoxin concentrations were measured in 25 children by a nonspecific, direct radioimmunoassay method (NS) and by a specific method in which digoxin was separated from its metabolites by HPLC before radioimmunoassay was applied to the digoxin fraction (S). Digoxin was detectable by S assay (sensitivity 0.1 ng/g in 16 heart specimens and 22 serum samples. The mean and range of the SINS ratio was 0.74 (0.23 to 2.63) for serum and 0.81 (0.068 to 1.38) for atrial tissue. By NS assay the mean and range of the atriallserum ratio was 78.1 (2.4 to 340, n = 21) and by S assay the corresponding values were 100 (10.7 to 318, n = 15). A multiple linear regression indicated that 72.5% of the variance of the heart digoxin concentrations measured by S assay were accounted,for by the variables height, body weight, daily digoxin dose before operation, plasma digoxin concentration by S assay, and BUN.
AB - After obtaining samples at open heart surgery, serum and right atrial digoxin concentrations were measured in 25 children by a nonspecific, direct radioimmunoassay method (NS) and by a specific method in which digoxin was separated from its metabolites by HPLC before radioimmunoassay was applied to the digoxin fraction (S). Digoxin was detectable by S assay (sensitivity 0.1 ng/g in 16 heart specimens and 22 serum samples. The mean and range of the SINS ratio was 0.74 (0.23 to 2.63) for serum and 0.81 (0.068 to 1.38) for atrial tissue. By NS assay the mean and range of the atriallserum ratio was 78.1 (2.4 to 340, n = 21) and by S assay the corresponding values were 100 (10.7 to 318, n = 15). A multiple linear regression indicated that 72.5% of the variance of the heart digoxin concentrations measured by S assay were accounted,for by the variables height, body weight, daily digoxin dose before operation, plasma digoxin concentration by S assay, and BUN.
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U2 - 10.1038/clpt.1983.78
DO - 10.1038/clpt.1983.78
M3 - Article
C2 - 6839630
AN - SCOPUS:0020630201
VL - 33
SP - 577
EP - 584
JO - Clinical Pharmacology and Therapeutics
JF - Clinical Pharmacology and Therapeutics
SN - 0009-9236
IS - 5
ER -