title: A new method of inhalation anesthesia with nasopharyngeal insufflation in rat experiment.
abstract: We have established a new method of anesthesia with nasopharyngeal insufflation for intraoral procedure in rodents. Twelve male Wistar rats weighing 330-390 g were used in this study. Insertion of a feeding tube 1.0 mm in diameter coated with 2% xylocaine jelly was inserted into the nasal cavity approximately 25 mm from the naris, and anesthetization with mixed gas of 100% oxygen with 3-4% enflurane at 0.25-0.5 l/min flow rate was achieved. Using this anesthetic method, a chronic experiment comprising 1-h/day experimental procedure was carried out for 14 days. This method enabled, 1) simple and safe operation of the induction, emergence and anesthetic depth, 2) experimental procedures on the dental/oral region, 3) avoidance of the dyspnea and tachypnea, and 4) avoidance of cumulative effects in daily anesthesia.
authors.affiliation: Department of Orthodontics, Kagoshima University Dental School, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan.
authors.forename: Konosuke
authors.initials: K
authors.lastname: Yamasaki
authors.forename: Kazuto
authors.initials: K
authors.lastname: Kuroe
authors.forename: Ryozo
authors.initials: R
authors.lastname: Kamimura
mesh_terms: D000769:Anesthesia, Inhalation / Q000379:methods*; D000818:Animals; D007327:Insufflation / Q000379:methods*; D008297:Male; D009305:Nasopharynx / Q000502:physiology*; D051381:Rats / Q000502:physiology*; D017208:Rats, Wistar