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Changes in blood gas samples produced by a pneumatic tube system
P O Collinson1, C M John, D C Gaze
1Department of Chemical Pathology, Mayday Hospital, London Road, Croydon CR7 7YE, UK. poctrop@poctrop.demon.co.uk
Journal of Clinical Pathology
|February 28, 2002
Summary
Transporting blood gas samples via pneumatic tube systems (PTS) can alter pO2 results. Using pressure-sealed containers during PTS transport prevents these changes, ensuring accurate blood gas analysis.
Area of Science:
- Clinical Chemistry
- Laboratory Medicine
- Medical Diagnostics
Background:
- Accurate blood gas analysis is critical for patient diagnosis and management.
- Pneumatic tube systems (PTS) are commonly used for rapid sample transport in hospitals.
- Potential pre-analytical variables, such as transport method, can affect blood gas results.
Purpose of the Study:
- To evaluate the impact of pneumatic tube system (PTS) transport on blood gas analysis parameters.
- To compare PTS transport with hand-delivery for blood gas samples.
- To assess the effect of pressure-sealed containers during PTS transport.
Main Methods:
- Blood gas samples were analyzed immediately after collection.
- Samples were transported to the central laboratory via PTS and analyzed.
- A comparative analysis was performed on samples transported in pressure-sealed versus non-pressure-sealed containers via PTS.
Main Results:
- PTS transport led to significant alterations in partial pressure of oxygen (pO2) values.
- No significant changes were observed in partial pressure of carbon dioxide (pCO2) or pH values.
- Utilizing pressure-sealed containers during PTS transport eliminated the observed pO2 alterations.
Conclusions:
- Pneumatic tube system (PTS) transport can introduce pre-analytical errors in blood gas pO2 measurements.
- Pressure-sealed containers are essential when transporting blood gas samples via PTS to maintain sample integrity.
- Recommendations for optimizing blood gas sample transport protocols to ensure accurate results.
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