Assuntos
Embolia Gordurosa/etiologia , Fraturas do Fêmur/complicações , Acidentes de Trânsito , Adulto , Gânglios da Base/diagnóstico por imagem , Embolia Gordurosa/diagnóstico , Fraturas do Fêmur/cirurgia , Humanos , Unidades de Terapia Intensiva , Imageamento por Ressonância Magnética , Masculino , Síndrome , Tálamo/diagnóstico por imagem , Adulto JovemRESUMO
Ketamine is a non-competitive antagonist to the phencyclidine site of N-methyl-d-aspartate (NMDA) receptor for glutamate, though its effects are mediated by interaction with many others receptors. It has been introduced in clinical use since 1960's but today it is not largely employed as a general anaesthetic for its undesired psychic effects (emergence reactions) occurring in approximately 12% of patients. In the last decade, there has been a renewed interest in the use of subanaesthetic doses of ketamine for the treatment of acute and chronic pain. In the late 1990's, multiple prospective, randomised, controlled study has shown the efficacy of low dose of ketamine for postoperative pain relief, for analgesia during regional or local anaesthesia, and for opioid-sparing effect. At present, non-definitive conclusion can be drawn. More data are needed to define the possible long term effects and the clinical goal of ketamine use.