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Epic Code LAB7640 CRRT Circuit aPTT (Inpatient Only)

Test Name Alias

APTT | PTT | Partial Thromboplastin Time | Activated Partial Thromoplastin Time 

Interface Order Alias

7640

Ordering Instructions

Inpatient Use Only

Collection Instructions

The specimen for this test is collected from a Continuous Renal Replacement Therapy Circuit machine (CRRT). 

Two aPTT samples will be ordered on a patient:

1.     CRRT Circuit aPTT: Specimen collected from the circuit machine. These are not patient specimens and can not be used for add-on testing.

2.     aPTT:  collected directly from the patient - See APTT collection instructions

Rejection Criteria

  • Hemolysis
  • Specimen has been thawed

Specimen Stability

Laboratory Retention: 24 hours

Reflex Information

Reflex approved by Medical Executive Committee. Please see link: Reflex Testing Document

Test Frequency

Available 24 hours, usual TAT 1 day.

Reference Range

The CRRT Circuit aPTT will be reported out only with a target range of 42 - 57 seconds

Reflex information: In the case in which an end point is not detected the Unfractionated Heparin Assay will be performed for confirmation.

Mandatory Reflex Testing Information (link)

APTT Reference Range

  • 21 - 27 seconds (Spectrum Health Regional Lab, Grand Rapids - BCS XP analyzer)
  • 21 - 31 seconds (Spectrum Health Regional Lab, Grand Rapids - CS 5100 analyzer)

 

Performing Department

COAGULATION

Performing Department Laboratory Location

Spectrum Health Regional Laboratory, Grand Rapids, MI

Spectrum Health Blodgett Laboratory, Grand Rapids, MI

Methodology

Clot-based assay

CPT

85730

CDM Code

80101963

Epic Test ID

1230101512

LOINC

APTT: 14979-9

Beaker LOINC

LOINC Not available

Reviewed Date

10/11/2021

Beaker Names

Beaker Procedure Name: PTT CRRT SYSTEM
Beaker Display Name: CRRT Circuit aPTT
BEAKER TEST NAME: CRRT CIRCUIT APTT
BEAKER TEST REPORT NAME: CRRT CIRCUIT APTT

Beaker Synonyms

No synonym on file

Beaker Location, Container and Temperature

BW COAGULATION: BLUE TOP TUBE (Preferred)-Ambient