Alberta Precision Laboratories

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Organization:

Alberta Precision Laboratories

Message Alert:

PLEASE NOTE: This Test Directory is in an interim state and due to changes pertaining to the DynaLIFE transition, performing site for routing has not been updated. Please refer to Laboratory Information System for appropriate routing.

Test Name/Synonym:

Partial Thromboplastin Time (PTT) (Synonym: APTT, Activated Partial Thromboplastin Time, Activated PTT, JPTT)

Shipping and Handling Alert:

Specimens are time sensitive.

LABID (Connect Care):

LAB325

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.
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.

Test Resources:

Indicate test under Additional Tests Section General Laboratory Requisition – 21302

Stability and Storage:

Room temperature - 3.5 hours

Processing:

For specimens that will be received at the testing site within 3.5 hours send UNCENTRIFUGED.
For specimens that will be received beyond 3.5 hours, centrifuge to obtain platelet poor plasma (platelet count <10 x 10⁹/L) and aliquot plasma using a plastic pipette into a polypropylene aliquot tube and freeze.
Platelet poor plasma must be prepared in accordance with the College of Physician and Surgeons of Alberta (CPSA) Laboratory Standard H.4.3.4. This must include procedures for regular verification that centrifuge(s) reliably produce plasma containing <10 x 10⁹/L residual platelets. Please contact Special Coagulation in Calgary 403-770-3598 (ext 3) or in Edmonton 780-407-8487 for detailed instructions.

Transportation:

Room temperature – uncentrifuged
Frozen (dry ice if available) - Specimens must maintain frozen state for entire duration of transport.

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:

See Laboratory Report.

Critical Value:

See Laboratory Report.

Testing Area:

Hematology

Performing Site:

Calgary Zone	Alberta Children's Hospital Banff Mineral Springs Hospital Canmore General Hospital Claresholm General Hospital Cochrane Community HC Diagnostic and Scientific Centre 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 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 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 Edmonton Base Laboratory 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 Fairview 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
Refer to High HCT Coagulation

Contact Comments:

1-877-868-6848

Last Updated On:

Wednesday, November 20, 2024