proficiency testing
External quality assessment program that evaluates laboratory performance using standardized samples with known values.
Full Definition
Proficiency testing in newborn screening involves external quality assessment programs where laboratories analyze standardized samples with predetermined target values to evaluate analytical performance. These programs typically provide samples that mimic real patient specimens across the analytical range, including normal, borderline, and clearly abnormal values. Results are compared against target values and peer laboratory performance to identify potential analytical problems, monitor long-term performance trends, and ensure consistency across screening programs. Participation in proficiency testing is often required for laboratory accreditation and regulatory compliance.
Usage
Usage note: Can be abbreviated as PT in laboratory contexts; distinguish from physical therapy in medical settings.
In Context
- "The laboratory achieved satisfactory performance on all proficiency testing samples for the metabolic screening panel." — accreditation report
- "Proficiency testing results indicated a systematic bias requiring immediate corrective action." — quality assurance documentation