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  INR Specimen Type:
  also known as International Normalized Ratio,  order Prothrombin time to get the INR result.



Specimen requirements: Blue Top
Critical values:
    >4.0 N/A
Unit of measure: N/A
Ideal sample: 2.7 mL Whole Blood in a 5.0 mL size blue top
Absolute minimum amount: N/A
Method of collection: N/A
Transportation: N/A
Label instructions: N/A
Request test on form: MULTI LABS [Chem/Hem/UA/Tox/BB/Rheum] ( 151-104 )
Order/entry screen(s): Hematology/Coagulation
Stat frequency: Daily
Stat turn around time: 1 Hour
Routine frequency: Daily
Must be in by: N/A
Routine turn around time: 4 Hours
For Hillcrest deliver to: SCRAP : Specimen Central Receiving and
  Processing, room 2-117
For Thornton deliver to: Hematology : Processing Desk, 1st floor,
  Hospital, room 1-013
Scheduling requirements : N/A
Method: Optical Hemostasis
Special Instructions: The INR can not be ordered separately. INR is a part of the Prothrombin time result

 INR is obtained by dividing the patient's protime result by the geometric mean of the normal range raised to the exponential value of the international sensitivity index (ISI). The ISI value is assigned by the manufacturer for the type of thromboplastin reagent and instrument that is used in the laboratory for the assay. INR values are essential for following the current recommended therapeutic ranges for patients who are on oral anti-coagulant therapy. INR = 2 to 3 for most patients and for patients with mechanical prosthetic heart valves: INR = 2.5 to 3.5.

  Results are available on a Chart Copy
  Results are Quantitative
CyberLAB abbreviation: INR
CyberLAB code: 7727
Lab Processing Instructions: N/A