Aspiration remains one of the most dreaded complications of endotracheal intubation. To mitigate the risk of aspiration in patients who are at high risk, rapid sequence induction (RSI) is used with an anesthetic and short-acting neuromuscular blocking agent. Cricoid pressure (the Sellick maneuver) has frequently been used for physically preventing aspiration.

Recognizing the lack of clinical trials that demonstrate clinically relevant beneficial outcomes, the use of cricoid pressure during RSI has been debated over the past decade.^1-3 Regarding efficacy, although cricoid pressure is often not performed appropriately (ie, applying 30 newtons of pressure in the proper location), most studies demonstrate that cricoid pressure may prevent gastric insufflation by occluding the esophagus and postcricoid hypopharynx.^4,5 However, other studies have suggested that cricoid pressure may displace the esophagus laterally or decrease lower esophageal sphincter pressure, thus increasing the risk of regurgitation.⁶ In addition, cricoid pressure may worsen the laryngoscopic view, further providing equipoise for studying its effectiveness.

抽吸仍是气管插管最可怕的并发症之一。为了降低高危患者的误吸风险，快速序列诱导（RSI）与麻醉剂和短效神经肌肉阻滞剂一起使用。环形压力（Sellick动作）经常被用于身体预防抽吸。

认识到缺乏可证明临床相关有益结果的临床试验，在过去的十年中，人们一直在争论在RSI期间使用环压治疗的问题。^{1 -3}关于功效，尽管通常无法适当地执行环突压力（即在适当位置施加30牛顿的压力），但大多数研究表明，环突压力可能会通过阻塞食道和环后咽下咽而阻止胃吹入。^{[4,5] ，}但是，其他研究表明，环突压力可能使食管横向移位或降低食道括约肌的下部压力，从而增加了反流的风险。⁶ 此外，环线压可能会恶化喉镜的视野，进一步为研究其有效性提供了平衡点。