Veripath Test Directory

Epic Test Name HEPTEM
Description HEPTEM assay is a semi-quantitative INTEM-basedassay used to inactivate heparin in patients receiving unfractionated heparin. The assay is performed on the ROTEM delta analyzer. HEPTEM reagent contains heparinase that degrades heparin, resulting in correction of clotting time (CT) in HEPTEM compared to CT in INTEM, thus confirming presence of heparin. HEPTEM provides information on how INTEM would have looked like in the absence of heparin.
Specimen Requirements 
Container Light blue (3.2 % sodium citrate) collection tube
Specimen Type Blood
Preferred Collection Volume 3mL
Minimum Collection Volume 2 mL
Collection Instructions When drawing specimens for coagulation testing, always draw a "pilot" tube (7-10ml plain red top tube), completely filled. This removes tissue fluid contamination. Samples should be obtained from peripheral vein whenever possible. If drawn from indwelling catheter, the line should be flushed with 15mL of saline. After irrigation, a "pilot" tube should be drawn and discarded.
Specimen Handling In-house patients, transport at room temperature.
Outside clients, follow collection instructions and the steps below:
1. Specimen must remain at room temperature.
2. Specimen must arrive withing 1 hour after collection.
Rejection Criteria Hemolysis, clotted, short sample, >4 hours old, frozen or centrifuged
Methodology Rotational thromboelastometry
Reference Range CT (139-193 second ); A20 (54-68mm); MCF(54-69); ML (<3%)
CPT Code(s) 85396
Department Hemostasis/Coagulation
Contact Information Hemostasis Lab; 214-633-4959 Customer Service: 214-633-0400, Toll Free 1-877-887-8136
Turn Around Time4 hours (24 hours- Outside clients)
Performed Sunday-Saturday
Performed by Hemostasis Lab
Updated/Reviewed 07/25/2016