Methodology
Mechanical
Synonyms
PT
Specimen Type
Plasma
Performing Lab
RCHSD Coagulation
Epic ID
LAB00028
Lab Test Days
As received
Standard TAT
4 hrs
Stat TAT
1 hr
Collection Information
Specimen Required
1.8 mL or 2.7 mL Sodium Citrate
Container Type
Light Blue (Sodium Citrate)
Collection Instructions
1. The preferred method of specimen collection for coagulation studies is a properly performed VENIPUNCTURE. The specimen may be collected directly into 1.8 or 2.7 mL vacutainer or into a syringe and then transferred immediately into a 1.8 or 2.7 mL vacutainer. 2. The vacutainer tube MUST contain the EXACT amount of blood. It is essential that LT blue top tubes are PROPERLY FILLED. Volume is CRITICAL and the blood (9 parts) to liquid anticoagulant (1 part) must remain intact for correct results. 3. The specimen should be transported to the Laboratory within one hour of collection. 4. SPECIAL INSTRUCTIONS FOR SPECIMENS COLLECTED FROM A LINE: If collecting specimens for coagulation studies from an indwelling line that may contain heparin, it is recommended that the line should be flushed with 5 mL of saline and the first 5 mL of blood or 6-times the line volume (dead space volume of the catheter) be drawn off and discarded before the coagulation tube is filled. For those samples collected from a normal saline lock (capped off venous port) twice the dead space volume of the catheter and extension set should be discarded. 5. Stability - Specimens are stable for 24 hours following collection.6. If patient's hematocrit is greater than 55%, contact hematology lab to request a light blue tube with adjusted anticoagulant amount.
Processing Information - Lab Use Only
Transport Temperature
Ambient-Only
Specimen Stability
Room Temp: 24 hrs
Rejection Criteria
Underfilled or overfilled tubes, clotted, refrigerated specimens.
Test Volume Required
1.8 ml or 2.7 ml light blue top
Minimum Test Volume
1.8 ml blood in light blue top (for neonates only)
Processing Instructions
Centrifuge within one hour of collection
Comments
(*ORDER PTINR IF INR IS NEEDED)
CPT Codes
85610
Revised
12-08-17
Initials
JZ