Mar 23, 2015




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Immunology

PR3 Ab

PR3 Ab (HCPR3) Immunology Lab Test

Name: PR3 Ab

Test Name: PR3 Ab

Health Link Test Code: HCPR3

LIS Test Code: PR3

CPT Code(s): 83520

Methodology: Enzyme Immunoassay

Clinical Information:

Follow levels of this specific antibody in patients with Wegener's granulomatosis who have been shown to have PR3 antibodies (typically associated with C-ANCA pattern).

Days Performed: Mon-Fri, dayshift - day varies.

In-Lab Turnaround Time: 1 week.

Stat In-Lab Turnaround Time: Not available stat.

Specimen: Blood

Collection Container: Red top

Also Acceptable: Red cap with yellow ring (SST)

Collection Volume: 3 mL

Pediatric Collection Volume: 1 mL

Stability Ambient:

8 hours

Stability Refridgerated:

7 days

Stability Frozen:

No limit at -20° C. Note: Avoid repeat freeze and thaw.

Sample Analyzed: Serum

Testing Volume: 1 mL

Pediatric Testing Volume: 0.3 mL

Specimen Processing:

Centrifuge. Transfer cell free serum to plastic vial. Refrigerate.

Specimen Transport:

Transport specimen to UWHC Hospital Laboratory. Transport with coolant pack if coming from clinic locations.

Unacceptable Criteria:

Microbially contaminated, grossly hemolyzed, lipemic and turbid specimens are not acceptable.


0 days and up: 0-20 Units


PR3 Ab Interpretive Guidelines:

0-20 Units  


21-30 Units  

 Weak Positive

> 30 Units  

 Moderate to Strong Positive

Interpretation Type: Reference Interval