Search
Close this search box.

Prothrombin Time

Specimen:

Collect

  • One Blue Top (Na Citrate)

Submit

  • 1 mL (Min:0.5 mL) Plasma . Submit Frozen. Submit in a Standard Transport Tube.

Special Handling

  • Whole blood may be submitted ambient if sample reaches lab within 24 hours

Rejection Criteria

  • Clotted Specimen
  • Collection tube not properly filled
  • Grossly Hemolyzed Samples
  • Refrigerated samples

Stability

Ambient: 8 Hour(s); Refrigerated: Unacceptable; Frozen: 2 Week(s); Incubated: Unacceptable

Methodology

  • Mechanical Clot Detection

Performed

Mon-Fri

Reported

1-3 Day(s)

CPT Codes

  • 85610

Interpretive Data

Please see report for interpretive data.
INR Ratio Reference Range:
Normal = 0.8-1.3
Std Dose = 2.0-3.0
High Dose = 2.5-3.5

The INR reference range is valid ONLY for patients stabilized on oral anticoagulants.

Components

  • 3501 - MEAN PAT. NORMAL
  • 3502 - RATIO: PAT./MEAN
  • 3507 - PT REF RANGE
  • 3508 - PROTIME
  • 3509 - INR
Last Updated: January 22, 2025 @ 10:13 am

Disclaimer:

It is preferable to locate tests on the website and not rely on printed test information, which may soon be out of date.
Updated test information can only be guaranteed by using this website.

Choose the Right Test

ARUP Consult® assists with test selection and interpretation

How to Label Your Sample

  • Label Your Test 1
  • Label Your Test 2
  • Label Your Test 3
  • Label Your Test 4
  • Label Your Test 5

Common Test Phrases

  • Label Your Test 1
  • Label Your Test 2
  • Label Your Test 3
  • Label Your Test 4
  • Label Your Test 5

Common Lab Definitions

  • Serum 
  • Plasma 
  • STT