Alberta Precision Laboratories

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Organization:

Alberta Precision Laboratories

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Test Name/Synonym:

INR (Synonym: Prothrombin Time, PT, Protime )

LABID (Connect Care):

LAB320

Specimen Type:

Blood

Primary Container:

LT BLUE CITRATE

Minimum Collection Volume:

Adults: One 2.7 mL LT blue citrate tube, allow the vacuum tube to completely fill, minimum fill is to frosted line on tube.
Pediatric and Neonate: One 2.7 mL or 1.8 mL LT blue citrate tube, allow the vacuum tube to completely fill, minimum fill is to frosted line on tube.

Specimen Collection Requirements:

It is important to fill tube to maximum draw.
Mix well immediately after collection by inverting tube 3 to 4 times.
Indicate collection time on tube.
If venous access is not available, sample can be drawn from a line but 6x the volume of the line or 5 mL (whichever is less) must be removed prior to collection.
When using a winged blood collection set (butterfly needle) a discard tube must be used to remove the air in the tubing, if only a citrate tube is drawn or is the first tube drawn.
PTT and INR can be collected in one LT blue citrate tube.
Refer to HE41-300 ACL Specimens - Epic

Test Resources:

General Laboratory Requisition – 21302

Stability and Storage:

Refer to HE02-220 Coagulation Specimen Stability

Processing:

For specimens that will be received at the testing site within 24 hours send UNCENTRIFUGED.
For specimens that will be received beyond 24 hours, centrifuge to obtain platelet poor plasma and aliquot plasma using a plastic pipette into a polypropylene aliquot tube and freeze.

Transportation:

Room temperature – uncentrifuged
Frozen (dry ice if available)

Routine Turn Around Time:

STAT:
ER – 90 minutes
In-Patient – 120 minutes
Out-Patient – 240 minutes
Community – 480 minutes

Routine:
In-Patient – 240 minutes
Out-Patient – 720 minutes
Community – 1440 minutes

Testing Schedule:

Daily
Stat testing is available.

Reference Interval:

0.8 - 1.2
Prothrombin Time is reported in INR (International Normalized Ratio)

Critical Value:

Greater than 5.0

Testing Area:

Hematology

Performing Site:

Calgary Zone	Alberta Children's Hospital Banff Mineral Springs Hospital Canmore General Hospital Claresholm General Hospital Cochrane Community HC Didsbury District HC Foothills Medical Centre Black Diamond, Oilfields General Hospital Okotoks Health & Wellness Urgent Care Centre High River General Hospital Peter Lougheed Centre Rockyview General Hospital Sheldon M. Chumir HC South Calgary HC South Health Campus Strathmore District Health Services Vulcan HC
Central Zone	Camrose, St. Mary’s Hospital Coronation Daysland HC Drayton Valley Hospital Drumheller HC Hanna HC Hardisty Innisfail HC Killam HC Lacombe Hospital Lamont HC Olds Hospital Ponoka Hospital Provost HC Red Deer Regional Hospital Centre Rimbey Hospital Rocky Mountain House HC Stettler Hospital Sundre Hospital Sylvan Lake Three Hills HC Tofield HC Two Hills HC Vegreville, St. Joseph’s General Hospital Vermilion HC Viking HC Wainwright HC Wetaskiwin Hospital
Edmonton Zone	Devon Hospital East Edmonton HC Fort Saskatchewan Hospital Grey Nuns Hospital Leduc Hospital Misericordia Hospital Northeast HC Redwater HC Royal Alexandra Hospital Strathcona Hospital Sturgeon Hospital University of Alberta Hospital Stony Plain, Westview HC
North Zone	Athabasca HC Barrhead HC Beaverlodge Municipal Hospital Bonnyville HC Central Peace HC Cold Lake HC Edson HC Elk Point HC Fox Creek HC Grande Cache HC Grande Prairie Regional Hospital High Prairie HC Hinton HC Jasper HC Lac La Biche HC Manning HC Mayerthorpe HC McLennan Sacred Heart HC Northern Lights Regional HC (FMH) Northwest HC (HLH Peace River HC Slave Lake HC Smoky Lake HC St. Paul HC St. Theresa General Hospital (FVH) Valleyview HC Wabasca Desmarais HC Westlock HC Whitecourt HC
South Zone	Bassano HC Bow Island HC Brooks HC Cardston Hospital Chinook Regional Hospital Crowsnest Pass Hospital Fort Macleod Hospital Medicine Hat Regional Hospital Milk River Hospital Oyen Big Country Hospital Pincher Creek Hospital Raymond Hospital Taber Hospital

Additional Test Information:

For patients with high hematocrit (Greater than 0.55 or greater than 55%), a special collection is required. Please order a High HCT Coagulation test.

Contact Comments:

1-877-868-6848

Last Updated On:

Wednesday, April 10, 2024