Carden E, Becker G, Hamood H
Can Anaesth Soc J. 1977 Jan;24(1):118-25. doi: 10.1007/BF03006819.
Studies carried out in the laboratory have shown that an S-shaped cannula for trans-laryngeal jet ventilation provides a distinct advantage over conventional straight ones. Tidal volumes are larger and the cannula is more stable in position. The tendency of perforate the posterior wall of the trachea during introduction is also minimal. Blood gas data obtained from patients being operated upon with this technique of anaesthesia show that it provides very adequate ventilation and can be effectively used with balanced anaesthesia if a nitrous oxide-oxygen blender is incorporated into the jetting system. It can be put in position before induction of anaesthesia to enable preoxygenation and assist ventilation and can be left in place at the end of the operation until the patient is breathing adequately. If necessary, a tracheostomy can be done with the cannula in situ. It is not proposed that this should be the standard mode of anaesthesia or ventilation for patients undergoing operations on the larynx, but in stituations where other methods are not adequate and when significant upper airway obstruction is present, this is an excellent alternative.
实验室研究表明，用于经喉喷射通气的S形套管相对于传统的直管形套管具有明显优势。潮气量更大，且套管位置更稳定。插入过程中穿透气管后壁的倾向也最小。采用这种麻醉技术进行手术的患者所获得的血气数据表明，它能提供非常充足的通气，如果在喷射系统中加入一氧化二氮-氧气混合器，可有效地用于平衡麻醉。它可在麻醉诱导前就位，以便进行预给氧和辅助通气，并且在手术结束时可留在原位，直至患者呼吸充分。如有必要，可在套管在位的情况下进行气管切开术。并不建议将其作为喉部手术患者的标准麻醉或通气模式，但在其他方法不适用且存在严重上气道梗阻的情况下，这是一个很好的选择。
