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Partial Thromboplastin Time
0030235
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Ordering Recommendation
Initial test for suspected bleeding disorder.
Mnemonic
PTT
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Sun-Sat
Reported
1-2 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Lt. blue (sodium citrate).
Specimen Preparation
Separate plasma from cells ASAP or within 2 hours of collection and freeze. Transfer 1 mL platelet-poor plasma to an ARUP Standard Transport Tube.
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Unacceptable Conditions
Serum. EDTA plasma, clotted or hemolyzed specimens.
Remarks
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks
NOTE: Specimens from patients on heparin must be centrifuged within 1 hour of collection and ambient stability is reduced to 2 hours.
Reference Interval
24-35 seconds
Interpretive Data
Compliance Category
FDA
Note
Reference interval established using 3.2% sodium citrate.
Hotline History
Hotline History
Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
N/A
CPT Codes
85730
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0030235 | Partial Thromboplastin Time | 14979-9 |
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
- Activated Partial Thromboplastin Time
- aPTT
- Partial Thromboplastin Time
- Partial Thromboplastin Time, Activated
- PTT
Partial Thromboplastin Time
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