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Effects of cardiac output on the onset of rocuronium-induced neuromuscular block in elderly patients

Abstract

Purpose

The aim of this study was to elucidate the relationship between the onset of rocuronium-induced neuromuscular block and arterial pressure-based cardiac output (CO) in elderly patients.

Methods

Forty elderly patients aged 65–83 years were enrolled in this study. After induction of anesthesia, contractions of the adductor pollicis muscle to ulnar nerve train-of-four stimulation were acceleromyographically evaluated and 1 mg/kg rocuronium was administered following CO measurement. The correlation between onset of rocuronium action and CO was analyzed.

Results

The mean [SD] CO reduced after induction of anesthesia from 5.1 [1.8] L/min to 3.8 [1.1] L/min. The onset time of rocuronium-induced neuromuscular block was 110.3 [23.9] s (range 60–165). There was a statistically significant inverse correlation between the onset time of rocuronium and CO [onset time (s) = − 13.2·CO + 159.7, R2 = 0.376].

Conclusions

In the elderly, CO influences the onset of action of rocuronium.

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Acknowledgements

Financial support: Departmental funding.

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Correspondence to Takahiro Suzuki.

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Conflict of interest

Takahiro Suzuki has received speaker fees from MSD Inc., Japan.

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Shiraishi, N., Aono, M., Kameyama, Y. et al. Effects of cardiac output on the onset of rocuronium-induced neuromuscular block in elderly patients. J Anesth 32, 547–550 (2018). https://doi.org/10.1007/s00540-018-2510-z

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  • DOI: https://doi.org/10.1007/s00540-018-2510-z

Keywords

  • Rocuronium
  • Circulation
  • Elderly