Types of Test

Code

HPP

CPT Code

85598

Loinc Code

Unit

Methodology

Clotting time using an activated partial thromboplastin time (aPTT) reagent is determined both in the presence and in the absence of HPP. The assay is considered to be positive for lupus anticoagulant when addition of HPP reduces the aPTT by more than 8 seconds.

Sample Types

Citrated Plasma

Sample Volume

1 ml

Sample Stability

14 days

Sample Temperature

‑20 °C

TAT (Working Days)

7

Comments

Note: Citrated plasma samples should be collected by double centrifugation