Abstract
Purpose
The aim of the study was to evaluate the plasma rocuronium concentration in autologous blood transfusion obtained from the cell salvage (CS) system following cardiac surgery with cardiopulmonary bypass (CPB).
Methods
This prospective observational study was conducted in a university teaching hospital from July to November 2020. Patients undergoing general anesthesia for cardiac surgery with CPB were enrolled in the study. After separation from CPB, residual blood remaining in the extracorporeal system was collected as the control sample. The second sample (CS blood) was collected from the autologous blood transfusion obtained after completion of the CS system with Cell Saver® Elite®. Hematocrit values of both samples were also examined.
Results
Ten subjects (aged 57–86 years) were enrolled in this study. Plasma rocuronium concentrations (ng/ml) were significantly lower in the CS blood (94.0 ± 77.5) compared to the control (2950 ± 812.2) (p = 0.002). Hematocrit values (%) were significantly higher in the CS blood (75.2 ± 11.3) compared to the control (40.2 ± 10.2) (p = 0.002).
Conclusion
Autologous blood transfusion obtained from CS system following cardiac surgery with CPB, only retained a small amount of plasma rocuronium concentration, therefore, the risk of autologous blood transfusion contributing to clinically relevant residual neuromuscular blockade postoperatively should be considered to be low.
Trial registration
This trial was registered in the University Hospital Medical Information Network under registration number UMIN000040877 (registration date; June 24, 2020).
Data availability
The datasets used and analyzed during the current study are available from the corresponding author on request.
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Acknowledgements
We express our appreciation to Dr. Kazuhiro Watanabe, Research Institute of Medical Research Support Center, Nihon University School of Medicine, Japan, for the plasma rocuronium concentration assay.
Funding
This study has not received any funding.
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Contributions
Study design: HI. Advisor for study protocol: SKL and TS. Data collection: HI, ST, OK, and YO. Data analysis: HI. Manuscript preparation: HI, ST, OK, YO, and SKL. Editing and approval of the manuscript: TS. All authors have read and approved the manuscript.
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Conflict of interest
Hajime Iwasaki, Shunichi Takagi, Osamu Kitajima, and Takahiro Suzuki have received speaker fees from MSD. Inc, Japan. Yukino Oshima and Sarah Kyuragi Luthe have no conflict of interest.
Ethical approval
The study was approved by the Nihon university Itabashi hospital ethics committee (approval number: RK-200609–5).
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Written informed consent was obtained from all the participants.
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Iwasaki, H., Takagi, S., Kitajima, O. et al. Plasma rocuronium concentration in cell salvage blood following cardiac surgery: a case series. J Clin Monit Comput 36, 1213–1217 (2022). https://doi.org/10.1007/s10877-021-00755-4
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DOI: https://doi.org/10.1007/s10877-021-00755-4