Seven of these responses were excluded from further analysis; five were high dependency units that do not admit ventilated patients, and two questionnaires were returned blank.
These investigations include brain imaging and brain electrical activity testing.
Opioids inhibit spontaneous neuronal firing and excitatory neurotransmitter release.
Clinical onset and duration distinguish morphine from fentanyl, despite similar half-lives.
Phencyclidine derivative with dissociative sedative, analgesic and amnestic properties.
Ketamine noncompetitively blocks the N-methyl-D aspartate (NMDA) receptor, part of a class of glutamate receptors mediating excitatory neurotransmission.