Pneumatic tube validation: Reducing the need for donor samples by integrating a vial-embedded data logger

Area of Science:

• Clinical laboratory science
• Biomedical engineering
• Transportation logistics

Background:

• Pneumatic tube systems (PTS) are common for transporting blood samples.
• Traditional validation compares PTS samples to hand-carried ones.
• Measuring forces within PTS is crucial for sample integrity.

Purpose of the Study:

• To define a validation protocol for pneumatic tube systems.
• To utilize a mini data logger (VitalVial) to reduce donor sample use.
• To establish a more efficient PTS validation method.

Main Methods:

• A five-day validation protocol using VitalVials to measure vibration (area under the curve).
• Clinical validation of the three highest vibration lines (potassium, LDH, AST).
• One-month follow-up on laboratory data post-PTS commissioning.

Main Results:

• Mean area under the curve varied between 347 and 581 across lines.
• Variability in area under the curve ranged from 1.51% to 11.55%.
• Increased lactate dehydrogenase (LDH) hemolysis observed in high-vibration lines, not detected during initial clinical validation.

Conclusions:

• A three-day validation protocol with VitalVials is adequate for Tempus600 system stability.
• This protocol significantly reduces the requirement for donor samples.
• Routine verification of PTS stability and LDH hemolysis monitoring is recommended post-commissioning.