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C4 binding protein

Lab Section:  Sendout Reference  
Lab Location:  Sendout
Reference Lab: Quest 
Test ID: LAB2716 
Synonyms: C4 Binding, Blood
Methodology: Radial Immunodiffusion
Schedule: Set up: Tues, Thurs p.m.; Report available: 4 Days
Reported: 7 - 14 days
Specimen Requirements:  Collection: 3.0 mL Blood in a Blue Top Tube.
Pediatric volume: 1.0 mL.
Transport: Frozen; transport on dry ice to prevent thawing.
Unacceptable conditions: QNS; clotted; ambient or refrigerated
Stability: Room temperature: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month


Clinical Indications: Thrombosis with low free Protein S. Severe illness may produce a high C4B, which binds free Protein S, making it less available for anticoagulation.

Reference Interval:  See patient report or consult reference laboratory website.
CPT Code(s): 86329
Last Changed: 10/06/2016 10:43:53
Last Reviewed: 12/21/2016 05:25:18