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Epic Code LAB321 Mixing Studies, PT

Important Note

There is currently a nationwide shortage of this tube. Please take steps to ensure specimen integrity to reduce recollection. Specimen Tube Shortage (link)

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.

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:

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Processed Specimen: Platelet Poor Plasma

 

Centrifuge/Spin: Yes

Aliquot: Yes

 

Processing Instructions:

  • Detailed instructions (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 hour)

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

Link: Mandatory reflex approved by MEC

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

10/11/2021