dexmedetomidine
Pronunciation: dex-med-eh-TOM-ih-deen
Highly selective alpha-2 adrenergic agonist used for sedation and anxiolysis in cardiac surgery patients.
Full Definition
Dexmedetomidine is a highly selective alpha-2 adrenergic receptor agonist that provides sedation, anxiolysis, and sympatholysis without respiratory depression. In cardiothoracic anesthesia, it is particularly valuable for its ability to blunt hemodynamic responses to intubation and surgical stimulation while preserving cardiac function. The drug offers the unique advantage of producing cooperative sedation where patients remain arousable, making it useful for awake craniotomy procedures and postoperative sedation in cardiac ICU settings. Its sympatholytic properties help reduce myocardial oxygen demand, which is beneficial in patients with coronary artery disease.
Usage
Usage note: Often abbreviated as 'dex' in clinical notes but should be written in full in formal documentation.
In Context
- "The anesthesiologist administered dexmedetomidine to provide anxiolysis without compromising respiratory drive during the pre-bypass period." — Anesthesia record
- "Postoperatively, the patient was maintained on a dexmedetomidine infusion to facilitate early extubation while providing adequate sedation." — ICU progress note