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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
PARTIAL THROMBOPLASTIN NON
MessagePTT: TUBE MUST BE FULL, DO NOT DRAW FROM HEPARIN LOCK.
Test Code
PTT
Preferred Specimen
LIGHT BLUE
Minimum Volume
Tube must be full
Specimen Stability
4 hours
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, short draw tubes, clotted specimens. Ultracentrifuge grossly lipemic specimens.
Limitations
This test will not detect platelet or vascular disorders.
Clinical Significance
The APTT test is a screening test of intrinsic pathway function. It measures deficiencies mainly in Factors VIII, IX, XI, XII, and Fletcher, but but can detect deficiencies of all factors except VII.
