Protime, Grand Itasca

Sunquest Code:GHPT  
Epic Code:LAB7049Epic Name:Protime GH
Methodology:Electromagnetic clot detection
Turnaround Time:Performed and reported 24 hours/day.

Collection Instructions

Optimal Volume:2.7 mL (in a 3 mL tube) - fill to fill line on tube
Minimum\Peds Volume:1.8 mL (in 2 mL tube) - fill to fill line on tube
Container:Blue Na Citrate, 3.2% - fill to fill line on tube
Collection Instructions:If patient's hematocrit is >55%, contact laboratory to obtain a special tube.
After Care:If patient has a coagulation abnormality, apply direct pressure to the puncture site for 10 minutes; apply a pressure dressing. Instruct the patient to leave the bandage on for 12 hours.
Causes for Rejection:Underfilled tube; clotted specimen; refrigerated specimen; over-filled tubes.

Processing and Shipping

Specimen Processing:Send whole blood or platelet poor plasma.
Shipping Instructions:Ship at room temperature. Whole blood specimens must arrive within 4 hours. If greater than 4 hours is required for transport, follow specimen processing instructions and ship frozen plasma on ice.
Test Performed at or Referral Lab Coagulation  (Grand Itasca GICH)


Critical Range:>= 5.0 INR (INR greater than or equal to 5.0)
Reference Range:11.9-15.2 sec (INR <= 1.3)
Therapeutic Range:2.0-3.0 INR
Use:PT becomes elevated with deficiencies in the extrinsic coagulation pathway clotting factors (fibrinogen and factors 2, 5, 7 and 10). Both the PT and the INR are more sensitive to deficiency of factor 2 than the other extrinsic factors.

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