Interventions to improve the mechanical ventilation fidelity of the Laerdal SimMan® 3G simulation mannequin

  • Neil J. Mehta
  • Renee Latoures
  • Martin M. Stechert
  • Richard L. Fidler
  • Jan Hirsch

To the Editor,

The Laerdal SimMan ® 3G mannequin (Laerdal USA, Wappingers Falls, NY, USA) is widely used for high-fidelity simulation. Nevertheless, providers familiar with mechanical ventilators commonly notice a lower lung compliance, necessitating lower set tidal volumes (V T) to reduce airway pressure. SimMan 3G is 180 cm tall, which corresponds to an ideal body weight of 75 kg (according to and a V T of 600 mL at 8 mL·kg −1. This “normal” V T without positive end-expiratory pressure (PEEP) results in a peak airway pressure of 34 cmH 2O. For a V T of 500 mL, the peak airway pressure was 28 cmH 2O and the static airway compliance was 24 mL·cmH 2O −1. This static airway compliance of the stock mannequin is about 30-50% of typical human values. 1 These values are reproducible among six SimMan 3G mannequins to which our group has access. Adding PEEP exacerbates problems with high-pressure alarms, and a PEEP above 5 cmH 2O and V Tof 500 mL results in an air leak...


Conflict of interest

There are no conflicts of interest for any of the authors to disclose.


There are no other associations to disclose.

Editorial responsibility

This submission was handled by Dr. Hilary P. Grocott, Editor-in-Chief, Canadian Journal of Anesthesia.


There are no external funding sources to disclose.


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Copyright information

© Canadian Anesthesiologists' Society 2017

Authors and Affiliations

  1. 1.Simulation Center and Anesthesia ServiceSan Francisco VA Medical Center and University of California San FranciscoSan FranciscoUSA

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