Epic Code LAB320 PT/INR
Test Name Alias
Protime with INR | PT with INR | 8434 | PTINR | Prothrombin Time | International Normalized Ratio
Interface Order Alias
10059
Ordering Instructions
If PT is drawn in conjunction with APTT use APTT specimen requirements for handling instructions.
Icons & Photos
Sodium Citrate tubes
Collection Instructions
Specimen Collection: Blood
Container(s): 3.2% Na Citrate Tube (blue top)
Preferred Volume to Collect: 2.7 mL (full 2.7 ml Na Citrate blue tube)
Minimum Volume to Collect: 1.8 mL (full 1.8 ml Na Citrate blue white tube)
Capillary collect ok: No
Microtainer acceptable: No
Collection Instructions:
-
Detailed instructions (link): Anticoagulant Correction for High Hematocrit
-
Detailed collection instructions (link): Blue Citrate Tube
-
Specimen should be processed within 24 hours – See Processing Instructions below. Specimen may be left unprocessed (unspun) for 24 hours.
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 2 - 3 aliquots, minimum of 0.5 mL each.
- Freeze aliquots in plastic transport tubes immediately.
-
Transport Temperature:
- Ambient - up to 24 hours in whole blood state (unspun)
- Frozen - plasma only >24 hours
Rejection Criteria
- Hemolysis
- Specimen has been thawed
Specimen Stability
Ambient: 24 hours (unspun)
Frozen: 2 months (aliquoted)
Laboratory Retention: 24 hours
Reflex Information
Test Frequency
Available 24 hours, usual TAT 1 day.
Reference Range
PT:
- 9.5 - 12.0 seconds
INR:
- 0.9 - 1.2 *INR value is clinically relevant only when patient is on warfarin
- Low Intensity anticoagulation theraputic range: 2.0-3.0
- High Intensity anticoagulation therapeutic range: 2.5-3.5
Performing Department
COAGULATION
Performing Department Laboratory Location
Spectrum Health Reference Laboratory, Grand Rapids, MI
Regional Hospital Laboratories:
Spectrum Health Big Rapids Laboratory, Big Rapids, MI
Spectrum Health Blodgett Laboratory, Grand Rapids, MI
Spectrum Health Gerber Laboratory, Fremont, MI
Spectrum Health Kelsey Laboratory, Lakeview, MI
Spectrum Health Ludington Laboratory, Ludington, MI
Spectrum Health Pennock Laboratory, Hastings, MI
Spectrum Health Reed City Laboratory, Reed City, MI
Spectrum Health United Laboratory, Greenville, MI
Spectrum Health Zeeland Laboratory, Zeeland, MI
Methodology
Prothrombin clot-based assay
CPT
85610
CDM Code
4098434
Epic Test ID
1230101099
LOINC
PT: 5902-2
INR: 6301-6
Beaker LOINC
INR: 6301-6
PROTHROMBIN TIME: 5902-2
Mayo Access Code
SHO8434
Reviewed Date
10/11/2021
Beaker Names
Beaker Procedure Name: PROTIME-INR
Beaker Display Name: Prothrombin Time (PT with INR)
BEAKER TEST NAME: PT
BEAKER TEST REPORT NAME: PT
Beaker Synonyms
No synonym on file
Beaker Location, Container and Temperature
BW COAGULATION: BLUE TOP TUBE (Preferred)
BL COAGULATION: BLUE TOP TUBE (Preferred)
BR COAGULATION: BLUE TOP TUBE (Preferred)
GM COAGULATION: BLUE TOP TUBE (Preferred)
KL COAGULATION: BLUE TOP TUBE (Preferred)
LH COAGULATION: BLUE TOP TUBE (Preferred)
PH COAGULATION: BLUE TOP TUBE (Preferred)
RC COAGULATION: BLUE TOP TUBE (Preferred)
UN COAGULATION: BLUE TOP TUBE (Preferred)
ZH COAGULATION: BLUE TOP TUBE (Preferred)