​Have you ever ​intubated a patient wearing a C-collar?  Chances are you shouldn't have.

What is it about the rigid cervical collar that makes life difficult?

It limits mouth opening and mobility of the larynx, worsening the view of the glottis.

Watch this view convert from a Cormack and Lehane grade 2 to a grade 1, just by removing the C-collar.

​MILS can be done with an assistant at the head or side of the bed.

Small studies (mainly on cadavers) have shown less cervical subluxation occurs during intubation with MILS rather than the rigid C-collar.  

Austin N, Krishnamoorthy V, Dagal A. Airway management in cervical spine injury. Int J Crit Illn Inj Sci. 2014 Jan;4(1):50-6
Ollerton JE, et. al., Potential cervical spine injury and difficult airway management for emergency intubation of trauma adults in the emergency department–a systematic review. Emerg Med J. 2006 Jan;23(1):3-11.