A
5200 Harry Hines Blvd.
,
Dallas
,
TX
75235
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General Information
Performed: Mon-Fri, 0700-1530
Turn Around Time: 1-3 days
CPT Codes: 85270
Performed By: Hematology
Notes: Results not affected by hemoglobin up to 500 mg/dL, triglycerides up to 1000 mg/dL and bilirubin up to 26 mg/dL.
Clinical Utility: Quantitative determination of Factor XI activity is utilized to aid in in the diagnosis of congenital or acquired Factor XI deficiency. Congenital deficiency of Factor XI is a rare inherited disorder usually affecting the Jewish population that may cause mild to severe bleeding especially after trauma or surgery.
Unacceptable Conditions: QNS, clotted, severely hemolyzed, icteric, lipemic, refrigerated, or on ice
Components
| Name |
Method |
Sex |
Age Range |
Ref. Range Low |
Ref. Range High |
Units |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
0 Minutes - Day 1 |
10 |
66 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
Day 1 - Day 4 |
10 |
66 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
Day 5 - Day 29 |
23 |
87 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
Day 30 - Day 89 |
27 |
79 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
Day 90 - Day 179 |
41 |
97 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
Day 180 - Day 364 |
49 |
134 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
1 Year - 5 Years |
56 |
150 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
6 Years - 10 Years |
52 |
120 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
11 Years - 16 Years |
50 |
97 |
% |
| Factor XI Activity |
Activated Partial Thromboplastin Clot Based Assay |
|
17 Years - 150 Years |
65 |
150 |
% |
Specimen Requirements
| Type |
Container |
Volume |
Units |
Collection / Delivery |
Storage / Transport |
Off Campus |
| Blood |
Blue Na Citrate, 3mL |
Draw to fill line |
|
Send to Lab within 3 hrs of collection. |
Room Temperature |
Deliver to Logistics Hematology Lab via STAT courier
|