右美托咪定：临床新效应

Dexmedetomidine: New Clinical Effects

摘要: 右美托咪定(Dexmedetomidine)是一种强效且高选择性的α2-肾上腺素能受体激动剂，具有解交感神经、镇静、遗忘和阿片保留等特性。它在众多临床应用中被广泛认可为一种安全且有效的辅助药物，能够提供独特的“有意识的镇静”状态——容易从睡眠到清醒过渡。目前，右美托咪定的临床应用范围广泛，包括重症监护病房(ICU)的镇静(成人和儿童)、急诊科、区域和全身麻醉、神经外科、儿童手术中经鼻腔或直肠给药的镇静、新型光纤插管、心脏手术等。不同的给药途径，如静脉给药，鼻内给药，口服给药，神经阻滞等，其使用剂量及不良反应等可能也存在差异，对于术后恢复的影响也不尽相同。低血压、高血压和心动过缓是最常见的不良反应，但通常可通过适当的临床管理得到控制。总之，右美托咪定凭借其独特的药理特性，已成为临床镇静治疗中的重要选择之一。

Abstract: Dexmedetomidine is a potent and highly selective α2-adrenergic receptor agonist with sympathetic, sedative, amnesia, and opioid retention properties. It is widely recognized as a safe and effective adjunct in numerous clinical applications, capable of providing a unique state of “conscious sedation”—an easy transition from sleep to wakefulness. Currently, dexmedetomidine has a wide range of clinical applications, including sedation (adults and children) in intensive care units (ICUs), emergency departments, regional and general anesthesia, neurosurgery, sedation administered through the nose or rectum in pediatric surgery, novel fiberoptic cannulation, cardiac surgery, etc. Different routes of administration, such as intravenous administration, intranasal administration, oral administration, nerve block, etc., may also have different dosages and adverse reactions, and their effects on postoperative recovery are also different. Hypotension, hypertension, and bradycardia are the most common adverse effects, but they are usually managed with appropriate clinical management. In conclusion, dexmedetomidine, with its unique pharmacological properties, has become one of the important choices in clinical sedation treatment.