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Additional Codes

Software Test Code

Performing Laboratory

NorDx Laboratories

Useful For

Monitoring heparin prior to femoral arterial sheath removal in patients that have had a cardiac stent placement

Method Name

Clot-Based Assay

Reference Values

90-125 sec

Days and Times Test Performed

Monday through Sunday

Report Available

1 Day

Available Stat

Specimen Type

Whole Blood

Preferred Container

Light Blue Top Tube (Sodium Citrate)

Preferred Volume

Whole Blood: (Light Blue Top Tube (Sodium Citrate)) – Tube must be full at time of collection

Specimen Collection and Handling

Collect as follows:

1. Add nine parts blood to one part buffered 0.105M (3.2 %) sodium citrate and mix gently 3 to 4 times.

2. Specimen must be delivered IMMEDIATELY to the laboratory for testing.

3. Do NOT centrifuge.

4. Send at ambient temperature.

5. Blood should not be taken from heparinized indwelling catheters or other anticoagulated lines without thoroughly flushing the line.
Such specimens must have a minimum of 6 times the dead volume of the line cleared with blood prior to specimen collection.

Platelet factor 4 is released during the centrifugation and suspension processes.
This release by the platelets can result in a false decrease in the ACT due to the neutralization of heparin by Platelet factor 4.

Rejection Information

Underfilled (<90 %) of total volume, (<2.0 ml of whole blood) or if centrifuged

Add On Capable

Not Permitted

Advance Beneficiary Notice Requirements

No ABN Required

CPT Code Information

CPT Code

CPT Description

CPT Disclaimer

85347 Coagulation Time; Lee and White, Activated

LOINC Code Information


Performing Laboratory Location

NorDx Laboratories