ACTIVATED PARTIAL THROMBOPLASTIN TIME (APTT/ PTT)

LABORATORY SECTION:

• Clinical Hematology (Coagulation)

METHODOLOGY:

• Fibrine polymerization

PURPOSE:

• Used to monitor heparin therapy
• Helps in determining bleeding disorders

PATIENT PREPARATION:

• No patient preparation needed

TYPE OF SPECIMEN:

• 1.8mL Citrated Plasma

REJECTION OF SPECIMEN:

• Clotted specimen
• QNS (Quantity not sufficient)
• Hemolyzed specimen
• Improperly labeled tube

RUNNING DAY:

• Everyday

SPECIMEN STABILITY:

• ROOM TEMPERATURE (20-24°C)

• REFRIGERATED TEMPERATURE (2-8°C)

• 24 hours

• Not acceptable

RELEASING OF RESULTS:

• 1 hour after blood extraction