What does proficiency testing involve?

Proficiency testing is a quality control process that evaluates the accuracy and reliability of laboratory testing by having laboratories perform tests on specimens that are provided by an external agency. This external monitoring agency sends out blind samples to assess how well the laboratory can analyze these specimens, ensuring that the results obtained are consistent with those from other laboratories that also participate in the testing program.

This process helps laboratories identify areas for improvement in their testing methodologies, personnel training, and overall practices. By comparing the results from different laboratories, it enhances the credibility and standardization of laboratory results, ultimately contributing to improved patient care.

The other options, while related to laboratory quality and procedures, do not accurately define proficiency testing. Testing of environmental samples focuses on a different area of laboratory work, monitoring cleanliness refers to laboratory management practices, and calibration ensures equipment accuracy but is not linked to the concept of proficiency testing. Thus, performance on external samples provided by a monitoring agency is the correct and defining activity for proficiency testing.