Chromogenic X
Label Mnemonic: CH10
Epic code: LAB1020
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
6240 RCP
Collection Medium:
Light Blue top tube 2.7 mL (Na Citrate)
Full draw; 2.7 mL light blue top
Rejection Criteria:
Short drawn tube, clot, traumatic tap (excessive hemolysis).
Delivery Instructions:
Deliver to laboratory immediately after collection.
Testing Schedule:
0800-1630 Monday through Friday. For additional services, contact Clinical Pathology Resident on-call at pager #3404.
Turn Around Time:
24-36 hours
Reference Range:
Greater than 50%

Therapeutic reference range is 11-42%
Test Limitations:
This test is to be used for coumadin monitoring of patients with positive Lupus anticoagulants.
Activity detection by chromogenic substrate
CPT Code:
See also:
Factor II Assay, Plasma