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Test Code POCACTLR POC Activated Clotting Time Low Range

Specimen and Container/Tube

Specimen Type: Fresh Whole Blood

Preferred Specimen: Plain syringe sample from indwelling line

Other Acceptable specimens: Plain syringe sample from a venipuncture

Specimen Stability

Storage Temperature

Stability

Room temperature

N/A

 

Refrigerated

N/A

Frozen

 N/A

Collection Instructions

  1. Collect at least 0.2 mL of fresh whole blood; avoid drawing from heparinized lines or locks.
  2. Mix samples thoroughly before applying to the test cartridge.
  3. Proceed to testing without delay.

Specimen Handling and Transport Instructions

UCMC Onsite Instructions: 

Coolect whole blood specimen and perform testing immediately.

 

UCMC Offsite and UC MedLab Outreach Instructions: 

N/A

Rejection Criteria

1. Sample contamination with: 

  • Tissue thromboplastin
  • Indwelling intravenous (I.V.) solutions
  • Alcohol cleansing solution
  • Visible clotting or debris accumulation.

2. Foaming of the sample (air bubbles).

3. Hemolysis.

4. Samples collected in glass blood collection tubes.

5. Unsuspected anticoagulation with either heparin or warfarin.

9. Presence of a lupus anticoagulant.

10.Delay in testing could result in falsely low results.

11. Poor technique during blood collection and delivery to the sample well

Reference Values

 

Test

Age

Sex

Reference Range

ACT LR

> 18 years

All

116 - 155 sec

Turnaround Time

STAT Turnaround Time: N/A

Routine Turnaround Time: N/A

Testing Schedule: 24/7

Clinical Indications

ACT-LR (Low Range Activated Clotting Time) monitors anticoagulation with low to moderate unfractionated heparin (UFH) doses, suitable for use during extracorporeal (ECMO) life support and cardiology procedures.

Methodology

Clot Detection

CPT Codes

85347

LOINC Codes

96683-8

Synonyms/Keyword Search

ACT Clotting Time Low range

ACT Low Range

Last Review Date

04/03/2026

Critical Values

Critical Values:

All ACT tests are performed under the direct supervision of a physician and results are reported immediately.

Test Components

Activated Clotting Time Low Range

Additional Information

GEM Hemochron 100 ACT test results should be used in conjunction with clinical and laboratory findings.

Test results exhibiting inconsistency with the patient’s clinical status should be repeated or supplemented with additional test data.

Volume

Preferred Volume: 1 mL

Minimum Volume: 200 microliters