Subsequent patient recall of intubation and emergency proceduresis highly variable and affected by the presence of coexisting TBI, intoxication, and the depth of hemorrhagic shock
Decreased cerebral perfusion appears to inhibit memory formation but cannot be reliably associated with any particular BP or chemical marker.
Administration of 0.2 mg of **scopolamine (a tertiary ammonium vagolytic) has been advocated to inhibit memory formation in the absence of anesthetic drugs in this situation,
There will always be specific situations where maintaining spontaneous ventilation during intubation is the preferred and indeed the safest manner in which to proceed.