Our priority is to ensure the safety and well-being of our patients and residents, and our people.

Emergency department outbreak information >>

Only pre-approved visitors can visit patients at our sites. Please check our COVID-19 information page to learn more about what to expect for your appointment/visit and how to be approved as a visitor. >>

Book an appointment online for COVID-19 testing at one of our Assessment Centres. >>


Text size: a a a

Laboratory Medicine

Test catalogue

Thrombin Time

Test name

Thrombin Time

Blue top Specimen Type / Requirements

Container Type = Blue Tube (Sodium Citrate)

Minimum Volume = Full draw

9:1 Ratio (9 parts blood to 1 part anticoagulant)

Specimen Handling

Collection Instructions: Must indicate anticoagulant status to avoid delay.

Write your initials, date and time of collection on the collection label.

Transportation: In/Outpatients: Send whole citrated blood at room temperature as soon as possible. Referred-in: Send frozen citrated plasma on dry ice. All samples must be sent to the Core Laboratory.

Stability: Specimens are stable for 4 hours post collection at room temperature. Specimens which are not tested within 4 hours can be double-spun to remove the citrated plasma. The citrated plasma is stable at -20°C for up to two weeks or -70°C for up to six months.

Sample Rejection Criteria: Clotted sample, grossly hemolyzed samples, Unlabeled or samples with insufficient quantity will be rejected.

Required Documentation

Turnaround Time (TAT)

STAT: 45 min

Routine: 4 hrs

Test Utilization

Reference Value

Automated method: 12.5 - 16.0 seconds

Manual method: 16.0 - 21.0 seconds

Test Code

RTT

Methodology

Clotting Assay

Testing Location

SMH-Routine Coagulation

Other Information

Last Updated: June 06, 2019