Activated Partial Thromboplastin Time (1)
| Test Name | Activated Partial Thromboplastin Time |
|---|---|
| Alternate Name(s) | PTT, aPTT |
| Laboratory Module | LAB |
| Ordering Mnemonic | PTT-HEP |
| Specimen Type |
Sodium Citrate 3.2% - Plasma |
| Collection Container | Blue - 2.7 mL or 1.8 mL |
| Container Information |
 |
| Collection Information | Tube must be full.
Test may be added-on (AOT) to existing sample up to 4 hours after collection time. |
| Test Schedule |
24/7 |
| Routine Turnaround Time | Turnaround times are posted in DOCS/Laboratory Turn Around Times DOCS# 9580 |
| Stat Turnaround Time | |
| Reference Interval | |
| Critical Values | |
| Lab Process Notes |
Non-heparinized plasma (patients not receiving heparin) should be tested within 4 hours of specimen collection. Plasma containing unfractionated heparin should be centrifuged within 1 hour of specimen collection, stored at room temperature and tested within 4 hours. |
| Storage and Transport |
Store unopened tube at 18-24°C for up to 4 hours. Platelet poor plasma may be aliquoted and frozen at < -20°C for up to 2 weeks. |
| Test Referred To | On-site, BGH Laboratory |
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Brantford, ON
N3R 1G9
519-751-5544
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238 Grand River St. North
Paris, ON
N3L 2N7
519-442-2251
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