Key result
Reduced centrifugation time and pneumatic tube transport produced clinically insignificant differences in DOAC plasma concentrations compared to standard methods.
Why the study?
Rapid results are needed when direct oral anticoagulant plasma concentrations are required in acute settings, prompting evaluation of sample processing to reduce turnaround time.
Does reduced centrifugation time and pneumatic tube transport affect plasma concentrations of direct oral anticoagulants in blood samples?
Does reduced centrifugation time and pneumatic tube transport affect plasma concentrations of direct oral anticoagulants in blood samples?
Reduced centrifugation time and pneumatic tube transport can be used to reduce turnaround time for DOAC plasma concentration measurements without clinically significant bias.
INTRODUCTION: Rapid results are needed when plasma concentrations of direct oral anticoagulants (DOACs) are required in acute clinical settings. We evaluated the impact of centrifugation time and pneumatic tube transport on DOAC plasma concentrations with the overall aim of reducing turnaround time. METHODS: Blood samples were spiked with rivaroxaban, apixaban or dabigatran in a low and a high concentration prior to centrifugation for 25 minutes (3163 g) or 5 minutes (3000 g) (n = 20 for each DOAC). Both samples spiked with DOACs (n = 20 for each DOAC) and patient samples (n = 25 in total) were transported manually or by pneumatic tube system samples. RESULTS: For samples spiked with DOAC, statistically significant differences in DOAC plasma concentrations were found between centrifugation times for rivaroxaban in low (P < .05) and high (P < .05) concentrations. Relative bias was below 9% for all DOACs. Statistically significant differences were found between modes of transportation for rivaroxaban (P < .01) and dabigatran (P < .01) in high concentrations. Relative bias was 4%-23% for all DOACs. For patient samples, no statistically significant differences were found between modes of transportation, and relative bias was below 12% for all DOACs. CONCLUSION: Minor, clinically insignificant, differences regarding centrifugation times were found in DOAC plasma concentrations. Importantly, no significant differences were found according to transportation modes for samples collected from patients. Although statistically significant differences were found depending on mode of transportation of spiked samples, relative bias was clinically acceptable. Thus, reduced centrifugation time and pneumatic tube transport should be considered to reduce turnaround time for rapid measurement of DOAC plasma concentrations.
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Roginski et al. (2021) studied DOAC therapy (n=85). Reduced centrifugation time (5 minutes) and pneumatic tube transport vs. Standard centrifugation (25 minutes) and manual transport was evaluated on DOAC plasma concentrations. Reduced centrifugation time and pneumatic tube transport produced clinically insignificant differences in DOAC plasma concentrations compared to standard methods.
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