Rocuronium versus saline for effective facemask ventilation during anesthesia induction: a double-blinded randomized...

Area of Science:

• Anesthesiology
• Respiratory Physiology

Background:

• Mask ventilation efficacy can improve with muscle paralysis during anesthesia induction.
• Obstructive sleep apnea (OSA) may present challenges in mask ventilation.
• Understanding factors influencing mask ventilation is crucial for patient safety.

Purpose of the Study:

• To investigate if muscle paralysis, induced by rocuronium, enhances mask ventilation during anesthesia induction.
• To compare the effectiveness of rocuronium versus placebo (saline) in improving mask ventilation parameters.
• To assess the impact of moderate to severe obstructive sleep apnea on rocuronium's effect on mask ventilation.

Main Methods:

• A double-blinded, randomized, placebo-controlled study involving 44 adult patients with moderate to severe OSA undergoing elective general anesthesia.
• Patients received either rocuronium or saline, blinded to the patient and provider.
• One-handed mask ventilation was performed, assessing capnogram waveform and tidal volume changes over one minute.

Main Results:

• No significant difference in breaths needed for a plateaued capnogram between rocuronium and saline groups.
• Rocuronium significantly increased mean tidal volume compared to saline (p=0.006).
• A higher percentage of patients in the rocuronium group achieved adequate tidal volume (94% vs 62%, p=0.026).
• Obstructive sleep apnea severity did not influence rocuronium's effectiveness in improving tidal volume.

Conclusions:

• Rocuronium administration improves tidal volume during one-handed mask ventilation.
• The benefits of rocuronium on tidal volume are evident even in patients with moderate to severe obstructive sleep apnea.
• Rocuronium is a potential adjunct for optimizing mask ventilation in specific patient populations.