As promised/per usual, here’s my presentation from the current National Assembly on Paediatric Emergency Medicine, being held now (16-19 Feb 2017) at the Apollo Institute of Medical Sciences & Research, Hyderabad, India. Much of the content is in the audio, of course…which I will post if/when available.
Comments welcome below as usual!
The newest edition of the Anaesthesia Tutorial of the Week (ATOTW #321) covers the much underestimated but critically important topic of predicting and managing difficulty in face mask ventilation. Irish anaesthetists Jonathan Holland and Will Donaldson have created a useful resource for anyone studying or performing airway management, or refreshing for exam purposes.
The authors discuss the predictors of difficult mask ventilation and report/propose another two mnemonics, to add to the existing stable (MOANS, BONES, etc):
I’ve always used MOANS for mask factors (like I use LEMON for laryngoscopy), but all these mnemonics cover the same ground. MOANS, for instance, stands for
M Mask seal factors, like beards, NGTs, odd shaped faces
O Obesity and causes of Obstruction, like tumours/angioedema
A Age extremes (the elderly and very young)
N No teeth (or nasty dentition)
S Snoring and Stiff lungs (the latter being issues like inhalation burns and acute bronchospasm, where the higher pressures required increase the risk of gastric insufflation and Splinting of the diaphragm)
As you can see, they are all much the same, although there are a few things that are not covered by every algorithm. The purist would point out that obesity is defined as a BMI of >30 kg/m2, not 26 as stated in the table.
The authors then present a useful flowchart for addressing unexpected difficulty, which is quite sensible. It is much in line with the DAS guidelines and other algorithms for general airway difficulty, and useful for instruction. Of course, in a dire emergency, using a cognitive aid such as the Vortex would be effective.