Anaesthetic drugs & techniques

Comparison of different weight-based scalars of remimazolam for anesthesia induction in patients with obesity: a randomized controlled trial

Can J AnaesthPublished Randomised controlled trial

Authors' conclusion

At 12 mg·kg-1·hr-1 iv, remimazolam dosing based on LBW in patients with obesity resulted in equivalent induction doses compared with normal-weight patients dosed by TBW. Total-body-weight-based dosing in patients with obesity resulted in a shorter duration to LOC.

Study context

Population
Patients with obesity undergoing GA induction with remimazolam, and normal-weight controls; Eye and ENT Hospital of Fudan University, Shanghai, China40 randomised
Participants
60 patients
Comparison
Remimazolam induction dosed by lean body weight (LBW) vs total body weight (TBW) in patients with obesity, with normal-weight controls dosed by TBW
  • LBWn = 20
  • TBWn = 20
  • Control (TBW)n = 20reference
Primary endpoint
Induction dose (mg·kg-1) for MOAA/S 0 achievement (loss of consciousness (LOC))
Methodological detailsprospective, single-centre
  • Prospective
  • Single-centre

Primary result

As reported in the abstract

Induction dose of remimazolam

P < 0.001

Original publication

Comparison of different weight-based scalars of remimazolam for anesthesia induction in patients with obesity: a randomized controlled trial. Can J Anaesth. Published 1 June 2026. doi:10.1007/s12630-026-03125-3

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