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Laboratory Test Reference Guide

Laboratory Information

Test Name

Lupus Anticoagulant

External Price (excl. GST)

Price

$102.04

Constituent Tests

Specimen Collection

Specimen Collection and Transport Protocols

It is recommended that Anti Cardiolipin Antibodies be requested, when investigating patients for Anti-phospholipid syndrome.

Adult Specimen

2 x 2.7 mL sodium citrate tubes (blue) and 4 mL Plain tube (Gold). Blood must be collected carefully as activated samples invalidate results.

Instructions for Referral to Waikato Lab

Aliquot Instructions

2.0 mL double spun platelet poor plasma

Aliquot Transport

Samples sent from outside laboratories must be separated by double-spinning technique and frozen within 4hours of collection. Sample must be received in Waikato Lab frozen. Any thawed samples cannot be tested.

Test Information

Department

Haematology

Test Availability

Mon - Fri, 0800 - 1630 excl. Public Holidays

Laboratory Turnaround Time

1 week

Reference Interval

APTTnonLA 25 - 35 secs
APTTC 25 - 37 secs
DRVVTratio 0.80 - 1.20
DRVVTCratio 0.85 - 1.05
LAratio 0.8 - 1.20
KCTratio 0.80 - 1.10
LAmixratio 0.80 - 1.20

Additional Information

This screen cosists of the following tests:
APTTnonLA
APTT correction
DRVVTratio
DRVVTCratio
LAratio
KCTratio
LAmixratio
Anti cardiolipin antibodies

Minimum Volume

2.0 mL double spun platelet poor plasma

Electronic Information

Registration Code

LUPUS

HL7Mapping Code

$LUPUS