A new plastic evacuated tube with plasma separator

Area of Science:

• Clinical Chemistry
• Materials Science
• Medical Devices

Background:

• Traditional glass blood collection tubes pose risks of breakage and sharps injuries.
• Evaluating alternative materials like plastic is crucial for improving laboratory safety and efficiency.

Purpose of the Study:

• To assess the performance and characteristics of a new plastic-walled evacuated blood collection tube with a plasma separator.
• To compare the plastic tube's properties against traditional glass tubes.

Main Methods:

• Evaluation of breakage resistance during handling and centrifugation.
• Determination of optimal centrifugation speed and time for effective plasma separation.
• Assessment of combustibility for medical waste disposal.
• Vacuum retention testing over typical shelf life.
• Analysis of drug recovery (carbamezepine, phenytoin, phenobarbital, valproic acid, theophylline, cyclosporine) compared to glass controls.

Main Results:

• Plastic tubes demonstrated high resistance to breakage and tolerated high centrifugation speeds (13,600g).
• Effective plasma separation was achieved in as little as 3 minutes at 13,600g, yielding high plasma volumes.
• Tubes were nearly completely combustible, aiding medical waste management.
• Vacuum stability was maintained throughout the shelf life.
• A modest average decrease of 6.8% in carbamezepine levels was observed, attributed to interactions with the plastic and separator.

Conclusions:

• The new plastic evacuated blood collection tubes offer significant advantages over glass, including enhanced safety and reduced breakage.
• Shorter centrifugation times and efficient plasma yield contribute to improved laboratory workflow.
• The material's combustibility and vacuum stability support safe and reliable use in clinical settings.