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Order Code LAB2436 Prothrombin Time (PT) with International Normalized Ratio (INR), Whole Blood

Additional Codes

Test Name in EPIC

EPIC Test Code           

Mnemonic

RV PROTIME/INR, WHOLE BLOOD (Lab Performed)

LAB2536

 PTWB

 

Useful For

PT/INR is useful for monitoring the coagulation status of patients on oral anticoagulation therapy such as coumadin/warfarin.

Specimen Requirements

Specimen Type: Whole Blood, finger stick    

Routine blood collection procedures apply to the sample collection. http://www.ridgenetonline.org/DocumentCenter/LabProcedures/Capillary%20Puncture%20CP.docx DO NOT WIPE AWAY THE FIRST DROP OF BLOOD.

       

Specimen Stability

Specimen Type Temperature Stability                    
Whole Blood  Ambient Immediately

 

Reference Values

Note:  These recommended values serve as guidelines.

  • PT:  9.4-12.5
  • INR:    0.9 - 1.1
  • PT/INR:  2.0 - 3.0 (prevention and treatment of deep vein thrombosis, chronic atrial fibrillation, prevention of systemic embolism in myocardial infarction, prosthetic tissue heart valves)
  • PT/INR:  2.5 - 3.5 (prosthetic mechanical heart valves)
  • An INR of >4.5 is a critical value and must be repeated with a venous draw.

Day(s) Test Set Up

Monday through Sunday

Performing Laboratory

Ridgeview Medical Center Laboratory

Ridgeview Sibley Medical Center Laboratory

Ridgeview Le Sueur Medical Center Laboratory

Ridgeview Clinics

Methodology

electrochemical measurement

Test Classification and CPT Coding

85610