Protime/INR PT/INR

Synonyms

Allscripts (AEHR) Order Name

Prothrombin Time and INR, Plasma

Sunrise Clinical Manager (SCM) Order Name

Prothrombin Time and INR, Plasma

EPIC Order Name

Prothrombin Time/ INR (PT/INR)

Clinical Info

Specimen Type

Blood

Container

Blue Top Tube

Collection Instructions

Container/Tube:  Light blue-top (3.2% sodium citrate) tube
Specimen:  Full tube
Collection Instructions:  1. If no other tube is drawn, draw a discard tube.
2. Fill tube completely.
3. Mix by gently inverting several times.
 
Collection Instructions:
If the light blue top tube is the only tube to be drawn and will be collected using a butterfly set, a “discard” tube (either a 
plain[non-additive] or light blue) must be partially drawn just to completely fill the collection tubing with blood before collecting 
the light blue top for testing.  Failure to perform this step will result in an under-filled tube that the laboratory will reject. Allow blood 
to fill the tube completely to the line on the tube.  The ratio of blood to anticoagulant is critical in coagulation testing and at least a 90% 
fill is required. Immediately mix the specimen by gently inverting the tube 4-6 times to completely mix with the anticoagulant.  
Failure to perform this can result in a clotted sample, which is unacceptable for testing.

Transport Instructions

Room Temperature

Specimen Stability

24 Hours Room Temperature (18-24C)

Methodology

Clotting-IL ACL-Top 

Days Performed

Monday through Sunday, Continuously

Performing Laboratory

Northwell Health Laboratories

CPT

85610

PDM

5500515

Result Interpretation

Reference Range:   

9.9 - 13.4  seconds

   INR: 0.85 - 1.16

Plesae note: Updated  Effective September 24, 2024

Forms