Middle Ear Pressure Variation: Effect of Nitrous Oxide

Previous studies examining middle ear pressure changes due to inhalant anesthesia, including nitrous oxide, have cited equivocal results. An investigation was performed to closely monitor changes in middle ear pressure during middle ear surgery. Baseline tympanometry was performed before anesthesia,...

Full description

Saved in:
Bibliographic Details
Published in:The Laryngoscope 1997-03, Vol.107 (3), p.357-363
Main Authors: Chinn, Kathleen, Brown, Orval E., Manning, Scott C., Crandell, Carl C.
Format: Article
Language:English
Subjects:
Acoustic Impedance Tests
Adenoidectomy
Anesthetics, Inhalation - administration & dosage
Anesthetics, Inhalation - pharmacology
Biological and medical sciences
Child
Child, Preschool
Ear, Middle - drug effects
Ear, Middle - physiology
Ear, Middle - surgery
Eustachian Tube - drug effects
Eustachian Tube - physiology
Female
Halothane
Halothane - administration & dosage
Halothane - pharmacology
Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics
Humans
Infant
Inhalant anesthesia
Male
Medical sciences
Middle ear pressure changes
Middle ear surgery
Middle Ear Ventilation
Monitoring, Intraoperative
Nitrous oxide
Nitrous Oxide - administration & dosage
Nitrous Oxide - pharmacology
Otitis Media - physiopathology
Otitis Media - surgery
Pressure
Reproducibility of Results
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Surgery of the ear, the auditive nerve and the facial nerve
Time Factors
Tonsillectomy
Tympanic Membrane - surgery
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Previous studies examining middle ear pressure changes due to inhalant anesthesia, including nitrous oxide, have cited equivocal results. An investigation was performed to closely monitor changes in middle ear pressure during middle ear surgery. Baseline tympanometry was performed before anesthesia, and middle ear pressure was then documented in 1‐min time intervals. A total of 97 subjects were studied; 51 received nitrous oxide and halothane, and 46 received halothane alone. Results indicate that nitrous oxide causes significantly greater pressure fluctuations than halothane alone. There were no effects for time of surgery, type of fluid, or baseline. Pressure fluctuation was attributed to eustachian tube function. Case studies are presented to demonstrate subject variability, and suggestions for validation study procedures are presented.
ISSN:0023-852X
1531-4995
DOI:10.1097/00005537-199703000-00015