Five freeze-dried PT samples are provided for vitamin D testing. The testing personnel followed the reconstitution instructions for the quality control (QC) material in use instead of the PT manufacturer's instructions. Reported PT values resulted in the failure of all five samples tested, with each failed result being approximately half of the anticipated acceptable range. What error most likely

How to Subscribe
MLS & MLT Comprehensive CE Package
Includes 176 CE courses, most popular
$109Add to cart
Pick Your Courses
Up to 8 CE hours
$55Add to cart
Histology CE Package$69Add to cart
Histology CE User Increase$69Add to cart
Individual course$25Add to cart
Need multiple seats for your university or lab? Get a quote
The page below is a sample from the LabCE course Proficiency Test Handling and Communication. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Proficiency Test Handling and Communication (online CE course)

Five freeze-dried PT samples are provided for vitamin D testing. The testing personnel followed the reconstitution instructions for the quality control (QC) material in use instead of the PT manufacturer's instructions. Reported PT values resulted in the failure of all five samples tested, with each failed result being approximately half of the anticipated acceptable range. What error most likely attributed to the testing failures?

Please select the single best answer