Quandt J E, Robinson E P
Veterinary Teaching Hospital, College of Veterinary Medicine, University of Georgia, Athens 30602-7390, USA.
J Am Vet Med Assoc. 1996 Sep 1;209(5):967-8.
Nasotracheal intubation can be accomplished in calves by use of a silicone nasotracheal tube of a Murphy design. For intubation, the calf's head and neck should be extended to facilitate tube passage through the naris into the ventral meatus and then through the larynx into the trachea. Preanesthetic medication may assist in tube passage by decreasing the alertness of the calf and decreasing the ability of the calf to swallow the tube into the esophagus. Nasotracheal intubation allows the inhalant anesthetic agent to be delivered with minimal room pollution and less stress to the calf. It would be useful for oral surgery when an orotracheal tube would obstruct the surgical site.
使用墨菲设计的硅胶鼻气管导管可对犊牛进行鼻气管插管。插管时，应伸展犊牛的头部和颈部，以利于导管通过鼻孔进入腹侧鼻道，然后穿过喉部进入气管。麻醉前用药可降低犊牛的警觉性，并降低犊牛将导管吞入食管的能力，从而有助于导管通过。鼻气管插管可使吸入性麻醉剂在对手术室污染最小且对犊牛压力较小的情况下输送。当口气管导管会阻塞手术部位时，它对口腔手术很有用。
