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Organization: | Alberta Precision Laboratories | |||||
Test Name/Synonym: | Partial Thromboplastin Time (PTT), LAC-Insensitive (Synonym: Actin FS) | |||||
Clinical Indications: | This test can be used to monitor the PTT in patients with Lupus Anticoagulant. | |||||
Shipping and Handling Alert: | Specimens are time sensitive. | |||||
LABID (Connect Care): | LAB74341 | |||||
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. | |||||
Test Resources: |
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Stability and Storage: | Room temperature - 3.5 hours | |||||
Processing: |
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Transportation: | Room temperature - uncentrifuged Frozen (dry ice if available) - Specimens must maintain frozen state for entire duration of transport. | |||||
Routine Turn Around Time: | Urgent: ER – 90 minutes In-Patient – 120 minutes Out-Patient – 240 minutes Community – 480 minutes Non-Urgent: In-Patient – 240 minutes Out-Patient – 720 minutes Community – 1440 minutes | |||||
Testing Schedule: | Daily Stat testing is available at performing site. | |||||
Reference Interval: | See Laboratory Report. | |||||
Critical Value: | See Laboratory Report. | |||||
Testing Area: | Coagulation | |||||
Performing Site: |
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Additional Test Information: | A standard PTT will be performed along with the Lupus Anticoagulant Insensitive PTT. If further tests are required, refer to Hemostasis Investigations. | |||||
Contact Comments: | 1-877-868-6848 | |||||
Last Updated On: | Wednesday, January 22, 2025 |