title: Laboratory problems in digoxin radioimmunoassay.
abstract: This review discusses the various technical problems likely to be encountered in digoxin assay using 125I methods. Many of these difficulties are not limited to digoxin, but are potential dangers when measuring a wide variety of substances by radio-ligand techniques. Emphasis is placed on ways to avoid or solve these problems. Beside error induced through technical aspects, which include radio-ligand reagents, dispensing equipment, and well counters, other potential sources of interference which are considered are the effects of medications, serum proteins, and previously administered radioactivity.
mesh_terms: D000918:Antibody Specificity; D000936:Antigen-Antibody Complex; D001798:Blood Proteins / Q000032:analysis; D004077:Digoxin / Q000008:administration & dosage / Q000097:blood*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007457:Iodine Radioisotopes; D011485:Protein Binding; D011786:Quality Control; D011863:Radioimmunoassay / Q000295:instrumentation / Q000379:methods*; D011869:Radioligand Assay / Q000379:methods
chemical_list: D000936:Antigen-Antibody Complex; D001798:Blood Proteins; D007457:Iodine Radioisotopes; D004077:Digoxin