Hi Jesus! Happy to meet you again here!! We usually don´t use it as perfussion, only in boluses and we use 0,5 mg/kg PRN or for induction of anesthesia we use a maximum dose of 4 mg/kg. Having said that, in our experience it has proven to be a very good option both in unstable and stable patients, and we have had 3 patients with hard to manage pain (probably due to OIH) and the really improved with ketamine plus dex, and they were afterwards bridged to clonidine.
We need to explore even deeper on ketamines actions. It is a very interesting drug from the diferent targets it has. And its use is very scarce at least in Argentina mainly because of fear of psych complications.
The same occurs in Spanish ICUs. To avoid opiod treatment dependence in critical care, and knowing that pain is present in our patients, we should use more frequently this kind of sedatives with analgesic properties, as we do with alfa 2 agonists.