Standard operating procedure reduces interoperator variation and improves accuracy when measuring packed cell volume

Operator-dependent variation in diagnostic testing can affect the reliability of results in veterinary settings. Prior research has shown that standardized procedures reduce variability in laboratory measurements. However, the extent to which this applies to PCV testing in a clinical environment remains unclear. No prior work had resolved how SOPs impact PCV accuracy in veterinary practice. This gap motivated the current investigation. Understanding the role of SOPs in PCV measurement is essential for improving diagnostic consistency. The study aimed to address this uncertainty by comparing outcomes with and without SOPs. The goal was to determine whether SOPs could reduce errors and variability in PCV testing. This approach could support the classification of PCV as a waived test in veterinary clinics.

The study aimed to assess whether implementing a standard operating procedure for PCV measurement reduces operator-related variability and increases accuracy. PCV is a common test in veterinary diagnostics, but results can vary depending on the operator's technique. This uncertainty drove the need for a controlled evaluation. The researchers sought to determine if SOPs could consistently improve test outcomes. They compared results from participants using SOPs with those without. The study focused on both clinical staff and veterinary students. The goal was to evaluate the impact of SOPs in a real-world setting. This approach could help establish PCV as a reliable waived test in veterinary medicine.

The study involved clinical staff and veterinary students performing PCV measurements on blinded duplicate samples. Participants were randomly assigned to use an SOP or not. The authors generated a reference value using WHO guidelines. Errors were categorized as either preparation or reading-related. The sample included 18 clinical staff and 39 students. Data were collected on the frequency and type of errors. Interoperator variation was analyzed between the two groups. The study used statistical methods to compare results with and without SOPs.

Using the SOP, 95% of results were within 0.0125 l/l of the reference value. Without the SOP, results were within 0.09 l/l of the reference. Interoperator variation was significantly lower in the SOP group (P=0.0025). Three clinical staff and seven students made reading errors, only one with SOP access. Five students and two staff had preparation errors, with one using the SOP. The SOP group had fewer errors and more consistent results. These findings suggest the SOP improves accuracy and reduces variability. The study supports the use of SOPs for PCV testing in clinical settings.

The study found that using an SOP significantly reduces interoperator variation in PCV measurements. The SOP group had results closer to the reference value than the non-SOP group. This supports the idea that PCV can be classified as a waived test. The authors propose that SOPs improve both accuracy and consistency. The findings suggest that SOPs should be implemented in veterinary settings. The study confirms the value of standardized procedures in diagnostic testing. These results align with the goal of improving diagnostic reliability. The authors state that SOPs can enhance the quality of PCV testing in clinical practice.