Endotracheal intubation

Use of a facemask is probably the most common means of delivering anesthetic gas to rodents; however, it is possible to use endotracheal intubation. In rodents, endotracheal intubation is most easily accomplished by direct visualization of pharyngeal and laryngeal structures. This can be accomplished by using a pediatric laryngoscope with a Wisconsin size 0 blade, filed down to make it narrower, and a fiberoptic light or penlight for a light source. Another option is to use a functioning otoscope which serves as both a light source and a speculum and has the added advantage of magnification. Endotracheal tubes can be fabricated using intravenous over-the-needle catheters. Catheter sizes range from 14 to 20 gauge depending on the size of the rodent being intubated, and the tip should be blunted to prevent trauma.

Respirators specifically designed for ventilation of rodents are available.