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martes, 4 de julio de 2017

The gag reflex

PulmCrit (EMCrit)
PulmCrit - July 4, 2017 -  ::By Josh Farkas 
"Summary: The Bullet
  • The gag reflex is a traditional component of the neurologic examination, but isn't evidence-based.
  • The reproducibility of the gag reflex is poor, due to variation in the techniques used to elicit it.
  • The specificity of the gag reflex is poor, being absent in ~20% of younger patients and ~40% of elderly patients.
  • The gag reflex is an unreliable predictor of aspiration, because it tests only a small fraction of the nerves and muscles required to control secretions via swallowing.
  • The gag reflex should not be used to assess whether patients can protect their airways.
  • The only rational use of the gag reflex appears to be certification of brain death."