Preparation for blood tests: what can go wrong before the sample reaches the lab

Area of Science:

• Clinical Laboratory Science
• Medical Diagnostics
• Healthcare Quality Improvement

Background:

• The pre-analytical phase is critical for laboratory testing accuracy.
• Errors in this phase can compromise diagnostic validity and patient care.
• Patient preparation and sample integrity are paramount.

Purpose of the Study:

• To highlight common pre-analytical errors in laboratory testing.
• To emphasize the importance of minimizing pre-analytical variability.
• To guide clinicians and patients on best practices for accurate test results.

Main Methods:

• Review of factors influencing pre-analytical laboratory testing.
• Identification of common errors in patient preparation, sample collection, handling, storage, and transport.
• Discussion of patient-specific variables affecting test outcomes.

Main Results:

• Pre-analytical errors can arise from patient factors (posture, fasting, medications) and procedural issues (identification, timing, haemolysis, contamination, volume).
• Adherence to specific laboratory protocols is essential.
• Effective patient preparation and meticulous sample handling are key to reducing errors.

Conclusions:

• Minimizing pre-analytical errors optimizes laboratory test utility.
• Awareness of patient factors and proper sample management reduces the need for repeat testing.
• Collaboration between clinicians, patients, and laboratories ensures accurate diagnostic results.