1) CAP'S PT program utilizes samples identical to patient samples and not only validates individual laboratories but utilizes peer comparison to generate more accurate ranges for proficiency samples
In proficiency samples
, we statistically determined the Luminex cutoff values that can predict a positive XM to be more than 2 SDs from the mean of samples associated with a negative XM.
We thought this difference could be attributable to either inappropriate freeze-thawing of the CAP proficiency samples
by a large number of reporting laboratories, a procedure that is expressively proscribed by CAP, or that the Immulite platform yields lower plasma ACTH results than the Scantibodies IRMA.
Cement and Concrete Reference Laboratory Proficiency Sample
Program: Final Report Portland Cement Proficiency Samples
Number 133 and 134, Cement and Concrete Reference Laboratory, Gaithersburg, MD, September 1999.
Commenting on the recent reports in the general press regarding the recommendation by the World Health Organization (WHO) that testing laboratories destroy proficiency samples
containing influenza A virus, the Company noted it produces such samples for the College of American Pathologists (CAP).
We also prepare and provide microbiology proficiency samples
to various clinical proficiency providers in the United States.
Extraction of whole-blood calibrators, controls, proficiency samples
, and human specimens was performed according to a recently published protocol (7).
These criteria, coupled with a good quality control program including XB (range of means), external proficiency samples
, and other sample comparisons can help assure quality operations in a hematology laboratory.
Those proficiency samples
that were found to have associated with them an increased imprecision for measurement of estradiol contained unconjugated estriol at concentrations >3 [micro]g/L.
You may want to check on proficiency samples
through CAP or other proficiency-testing providers.
A repeated measures ANOVA showed no significant differences across the sites for results of the proficiency samples
(FPSA, P = 0.
The comparison of results for CAP Proficiency samples
with the AC5;180, PSA-2, IMx, and Bayer Immuno 1 PSA assays are consistent with the results shown in Fig.