Chemistry and Toxicology Guide for Acceptability and Add-on Requests Listed below are the maximum times allowed for blood specimen acceptability based on sample collection time and acceptable tube types. The preferred tube types are Bolded (method manufacturer recommended), other tube types listed are also acceptable. All tests not listed or exceeding these guidelines must be approved by a laboratory supervisor, manager, director, or pathology resident prior to performing the assay. A description of tube types and corresponding anticoagulants is also provided. Alphabetical Test List AAT Acetaminophen,,, Lt, tightly un AFP 3 days 3 days Albumin Alcohol/Ethylene Glycol Red, SST, Gray, Red, SST,, Lt, 8 hours
Chemistry and Toxicology Guide for Acceptability and Add-on Requests Alk Phos ALT Ammonia,,, tightly un 1 hour on ice 15 min if not on ice Frozen for 24 hours Not available as An Amikacin Amylase AST Barbiturate Benzodiazepine Bilirubin, Total Bilirubin, Conj (Direct Bili) BNP,,,,,, Dk, Lt Dk, Lt 4 hours 12 hours (*24 12 hours (*24 If >4 hours, should be spun, separated and frozen. 12 hours 12 hours 4 hours Page 2 of 9
Chemistry and Toxicology Guide for Acceptability and Add-on Requests C3 C4 CA 125 Caffeine Calcium Carbamazepine Carbon Dioxide (ECO 2 ) CEA Ceruloplasmin Chloride Cholesterol CK Lt,,, Lt, tightly un 6 hours 3 days 3 days 6 hours 3 days 3 days 6 hours 6 hours (*24 1 hour 3 days 3 days Page 3 of 9
Chemistry and Toxicology Guide for Acceptability and Add-on Requests Cholinesterase CK-MB Cocaine tightly un Cortisol Creatinine CRP Digoxin Estradiol Dk, Lt, 6 hours 3 days 3 days 4 hours 5 days (PST/SST run within 4 hours) 4 hours 2 days 2 days Ferritin, Folate 3 days 3 days Page 4 of 9
Chemistry and Toxicology Guide for Acceptability and Add-on Requests FSH GGT Gentamicin Glucose Haptoglobin HCG (Quant/Qual) HDL Homocysteine IgA IgE IgG IgM, Gray, Red, SST,, No EDTA tightly un 2hours 7 days 7 days 3 hour (Gray fluoride tube: 3 days) 3 days 3 days 3 days 3 days Separate within 1 hour of collection. should arrive on ice if >1 hour post collection. Page 5 of 9
Chemistry and Toxicology Guide for Acceptability and Add-on Requests Iron Ketone Lactate LD LDL LH Lipase Lithium Magnesium Myoglobin Opiate Osmolality Lt, Gray Lt, Lt tightly un 6 hours 6 hours (*24 6 hours 12 hours 2 days 2 days 6 hours 6 hours (*24 1 hour Page 6 of 9
Chemistry and Toxicology Guide for Acceptability and Add-on Requests Phenobarbitol Phenytoin and Free Phenytoin Phosphorus Plasma Hgb Potassium Prealbumin Primidone Progesterone Prolactin Protein, Total PSA PTH-Intact,, EDTA,, Red, SST, EDTA tightly un 3 hours 3 hours 3 days 3 days 3 days 3 days 8 hours RT, spun or unspun If >8 hours, should be frozen 8 hours Page 7 of 9
Chemistry and Toxicology Guide for Acceptability and Add-on Requests RF Salicylate Sodium T3 T4, Free T4 Total Theophylline T Uptake Tobramycin Transferrin Triglycerides Troponin I, Lt, Lt, Lt?, Lt, EDTA, Lt Lt, Kept cool during tightly un at RT for up to 8hr then stored at 4 C. 6 hours 3 days 3 days 3 days 3 days 12 hours Page 8 of 9
Chemistry and Toxicology Guide for Acceptability and Add-on Requests TSH Urea (BUN) Uric Acid Valproic Acid Vancomycin Vitamin B12, Lt,, Kept cool during tightly un at RT for up to 8hr then stored at 4 C. 5 days 5 days 3 days 3 days Tube types and corresponding anticoagulant: Red-stopper tube: Silica clot activator, no anticoagulant or preservative. Mottled red/gray or -stopper (serum-separator) tube: Contains clot activator and gel for separating serum from cells, but not anticoagulant. Lavender ()-stopper tube: Contains liquid K 3 EDTA. Gray-stopper tube: Contains sodium fluoride (a preservative) and potassium oxalate (an anticoagulant). Glycolytic inhibitor. Dark -stopper tube: Contains sodium heparin Light -stopper tube: Contains lithium heparin Page 9 of 9