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Test Code PINR Prothrombin Time And INR

Specimen Type

Blood.

Preferred Collection Container

BLUE

Collection Volume

2.7 mL in 2.7 mL tube

Minimum Collection Volume

1.8 mL in 1.8 mL tube

Collection Instructions

Routine venipuncture. If multiple tests are being drawn, draw coagulation studies last. If only coagulation studies are being drawn, draw 1-2 mL into another Vacutainer, discard and then collect coagulation specimen. This collection procedure avoids contamination of the specimen with tissue thromboplastins. A special tube should be obtained from the laboratory for hematocrits over 55%. Specimens should be transported as soon as possible to the Clinical Laboratory.

Rejection Criteria

Specimens that are clotted, hemolyzed, diluted with IV fluid, received more than 24 hours after collection, insufficient volume. Samples that were frozen and thawed during transport.

Specimen Storage and Stability

For testing delayed longer than 24 hours- centrifuge sample for 15 mins at 1500g and separate plasma. Transfer once-centrifuged, citrate plasma into a plastic tube. Sample should be frozen in a frost-free -20 C freezer. Sample must remain frozen until testing is performed.

Turn Around Time

Routine Acute Care- 8 hours; STAT Acute Care – 40 minutes; Routine Outpatient: 1 day/Same day

Lab Department

Hematology

Alias

Protime; PT; Prothrombin Time; Protime and INR; INR;

Ordering Info

NOTE: Collection of blood for coagulation testing through indwelling catheters that have been flushed with heparin should be avoided, if possible. If specimen is drawn through an indwelling catheter, the line should be flushed with 5 ml saline and the first 5 ml of blood or six times the deadspace volume of the catheter being used should be discarded. Proper collection and handling of specimens is critical.

EPIC Code

LAB320

Pediatric Collection Container

BLUE

Acceptable Collection Container

BLUE (3.2% buffered sodium citrate)

Day(s) and Time(s) Performed

Monday through Sunday, 24 hours

STAT Availability

YES