Epic Code LAB321 Mixing Studies, PT
Test Name Alias
Mixing Studies PT | 4118
Interface Order Alias
10463
Quick Collect
+(1)S10/POx3/F
Clinical Information
Used to investigate a prolonged prothrombin time, factor deficiency or factor inhibitor.
Icons & Photos
3.2% Na. Citrate
Collection Instructions
Specimen Collection: Blood
Container(s): 3.2% Na Citrate Tube (blue top)
Preferred Volume to Collect: 8.1 mL (3 full 2.7 mL tube)
Minimum Volume to Collect: 5.4 mL (3 full 1.8 mL tube)
Capillary collect ok: No
Microtainer acceptable: No
Collection Instructions:
-
Detailed instructions (link): Anticoagulant Correction for High Hematocrit
-
Detailed instructions (link): Blue Citrate Tube
- Specimen should be processed within 1 hour – See Processing Instructions below.
PROCESSING INSTRUCTIONS (Laboratory, Outpatient or Off-site collection)
Processed Specimen: Platelet Poor Plasma with a platelet count <10 X 109/L
Centrifuge/Spin: Yes
Aliquot: Yes
Processing Instructions:
- Centrifuge and remove plasma within 1 hour of collection.
-
For detailed instructions to prepare platelet poor plasma please use the following (link): Preparing Platelet Poor Plasma
-
- Separate plasma into 4-6 aliquots, minimum of 0.5 mL each.
- Freeze aliquots in plastic transport tubes immediately.
Transport Temperature:
- Ambient (up to 1 hour in whole blood state)
- Frozen (plasma only >1 hours)
Rejection Criteria
- Hemolysis
- Specimen has been thawed
Specimen Stability
Ambient: Up to 1 hour in whole blood state
Frozen: platelet poor plasma aliquoted and frozen within 1 hour of collection (2 months)
Laboratory Retention: 2 months
Reflex Information
Test Frequency
Available Monday-Thursday, usual TAT 1-4 days.
Reference Range
9.5 - 12.0 seconds
Pathologist interpretation reported with results if indicated.
Performing Department
Coagulation
Performing Department Laboratory Location
Corewell Health Reference Laboratory, Grand Rapids, MI
Methodology
Prothrombin based clot assay
CPT
85610
CDM Code
3008561001
Epic Test ID
1230100948
Mayo Access Code
SHO4118
Reviewed Date
3/23/2023
Updated date
9/4/2024 - Processing Instructions