Strang T I
Department of Anaesthetics, Royal Albert Edward Infirmary, Wigan.
Anaesthesia. 1992 Oct;47(10):829-31. doi: 10.1111/j.1365-2044.1992.tb03138.x.
The laryngeal mask airway was inserted in 10 cadavers. At postmortem the chest was opened and an infusion set primed with a dilute barium solution was inserted into the oesophagus and ligated in place. A cricoid force of 43 N was then applied and the infusion set was positioned so that when the clamp was opened it generated a pressure of 7.8 kPa within the oesophagus. The cricoid pressure was able to stop the flow of fluid into the oesophagus. This demonstrates that cricoid pressure is effective in preventing reflux at intragastric pressures which are encountered clinically and the presence of the laryngeal mask airway does not compromise this.
在10具尸体上插入喉罩气道。尸检时打开胸腔，将预先用稀释钡剂溶液灌注的输液器插入食管并结扎固定。然后施加43 N的环状软骨压力，并将输液器放置好，以便在打开夹子时在食管内产生7.8 kPa的压力。环状软骨压力能够阻止液体流入食管。这表明环状软骨压力在临床上遇到的胃内压力下能有效防止反流，且喉罩气道的存在不会影响这一效果。
