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Factor XI Activity
Last Modified:
8/31/2023 3:19:16 PM
Medical Necessity Documentation:
Client Notes:
Patient Preparation:
Specimen Requirements:
1.0 mL platelet poor plasma from a
Blue Top Tube
- 3.2% Na Citrate in a Plastic Vial
Collection Instructions:
Centrifuge light blue-top tube for 15 minutes at approximately 1500 x g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid WBS/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (< 10,000/uL).
Freeze immediately and ship on dry ice.
Transport & Storage: Temperature/Stability:
14 days Frozen
Reference Range:
65-150% of normal
Critical Ranges:
Test Comments:
Methodology:
Photometric Clot Dectection
Clinical Significance:
Bleeding disorders may be due to inherited or acquired deficiencies of a clotting factor.
Documentation:
Custom Panel:
No
PRODUCTION SCHEDULE
Turn Around Time:
4 to 7 days
Days Performed:
Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed:
Quest - Chantilly
PHL Test Code:
FCT11
EPIC Test Code:
LAB309
Send Out Test Code:
360X / 29143
Alternate Test Names:
Factor XI Assay
Included Tests:
CPT Coding:
85270
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