Test directory: Elevated PT/Elevated PTT Workup, w/ Reflex

Ordering Code 6306
Test Name Elevated PT/Elevated PTT Workup, w/ Reflex
Alias Abnormal PT/Abnormal aPTT Workup Reflexive Profile
Prolonged Prothrombin Time/Prolonged Activated Partial
Thromboplastin Time Workup with Reflex Testing
Profile Contains
Preferred Specimen Plasma, Citrate 3.2% (Lt Blue)
Preferred Container 3 B (Citrate - Blue Top)
Optimum Volume 5 mL (5 aliquot tubes with 1 mL of plasma in each)
Collection Instructions Draw 5 full tubes. Mix tubes well.
Handling Instructions QMC Punchbowl: Deliver specimens to the Punchbowl laboratory immediately
Other sites: Double centrifuge specimen(s), aliquot plasma into 5 separate aliquot tubes and freeze at -20 deg C immediately. Do
NOT thaw once specimen is frozen.
Transport Requirements Preferred method of transport is frozen plasma.
Specimen Stability Ambient: 1 Hour Whole Blood (unopened tubes)
Frozen: 2 Weeks Plasma
Avail. Stat NO
Analytic Time 1 Day

Reference range(s) for Prothrombin Time (PT)

The reference ranges listed below are valid on this date of June 23, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Fibrinogen ALL 200-393 200-393 mg/dL

Reference range(s) for Prothrombin Time (PT)

The reference ranges listed below are valid on this date of June 23, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Prothrombin Time (PT) ALL 10.2-12.9 10.2-12.9 secs
INR ALL >= 4.5 >= 4.5
Moderate-intensity... Moderate-intensity Warfarin therapy         2.0-3.0
Higher-intensity Warfarin therapy           2.5-3.5
Note1

Note1:

Moderate-intensity Warfarin therapy         2.0-3.0
Higher-intensity Warfarin therapy           2.5-3.5
.

Reference range(s) for Prothrombin Time (PT)

The reference ranges listed below are valid on this date of June 23, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Activated Part. Throm. Time (APTT) ALL 25.1-36.5 >= 200.1 25.1-36.5 >= 200.1 secs

Reference range(s) for Prothrombin Time (PT)

The reference ranges listed below are valid on this date of June 23, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Thrombin Time ALL 10.3-16.6 10.3-16.6 secs