Investigation of Middle Ear Pressure Changes During Prone Position Under General Anesthesia Without Using Nitrous Oxide

Degerli, Semih; Acar, Baran; Sahap, Mehmet; Polat, Aytac; Horasanlı, Eyüp

doi:10.1097/scs.0b013e31829aad7c

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…She was also in a prone position which is known to increase MEP by 12.2 ± 3.6 mm Hg. 12 The mechanism for increased MEP with prone positioning is suspected to be related to a decrease in Eustachian tube patency. The patency of the Eustachian tube in horizontal positioning is reduced to 38% compared to patency while sitting.…”

Section: Discussionmentioning

confidence: 99%

Acute Intraoperative Tympanic Membrane Rupture in Patient Anesthetized With Desflurane Without Nitrous Oxide: A Case Report

Cincotta,

Brandenburg

2024

A&A Practice

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We report a case of acute intraoperative tympanic membrane (TM) rupture in a patient anesthetized with desflurane without N2O. The patient was undergoing endoscopic retrograde cholangiopancreatography (ERCP) to treat ascending cholangitis. TM rupture is known to occur with N2O but has not been reported in the literature with the use of inhaled volatile anesthetics without N2O. We suspect that several factors contributed to this complication, including prone positioning, a remote history of ear trauma, and the selection of desflurane as the maintenance anesthetic as opposed to a vapor with a higher blood-gas partition coefficient.

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Section: Discussionmentioning

confidence: 99%

Acute Intraoperative Tympanic Membrane Rupture in Patient Anesthetized With Desflurane Without Nitrous Oxide: A Case Report

Cincotta,

Brandenburg

2024

A&A Practice

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Do Intubation Devices Affect Middle Ear Pressure Dynamics?

Torun

Kuşderci

Öterkuş

2019

Journal of Craniofacial Surgery

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Our study aimed to investigate the effects of different intubation devices on middle ear pressure (MEP) dynamics by evaluating MEP during stages of anesthesia. Sixty-one consecutive patients were randomly assigned to 2 groups: the classical endotracheal intubation group and the Baska Mask (a new laryngeal mask [LMA]) group. All patients received the same anesthesia protocol. The right and left MEP values of the patients were measured and recorded preoperatively, during the induction of anesthesia, at the time of intubation and at 5th minute of anesthesia. In group 1, the pressure values measured in the right ear during anesthesia induction, at the time of intubation and at 5th minute of anesthesia were 10.97 ± 27.06, 16.77 ± 29.40, and 21.64 ± 90.31, respectively, compared to left ear values of 8.61 ± 26.39, 18.77 ± 37.84, and 38.61 ± 56.96 daPa, respectively. In group 2, MEP values measured in the right ear during anesthesia induction, at the time of intubation, and at 5th minute of anesthesia were 9.53 ± 20.43, 22.30 ± 41.50, and 20.60 ± 46.85 daPa, respectively, compared to left ear values of −4.26 ± 25.17, 6.20 ± 26.56, and 30.30 ± 65.17 daPa, respectively. MEP was statistically significantly increased in the classical endotracheal intubation group compared to the LMA group. We found that the increase in pressure is lower in patients receiving LMA compared to classical endotracheal intubation. The Baska Mask LMA is recommended in selected patients to prevent complications of MEP elevation.

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Investigation of Middle Ear Pressure Changes During Prone Position Under General Anesthesia Without Using Nitrous Oxide

Cited by 2 publications

References 20 publications

Acute Intraoperative Tympanic Membrane Rupture in Patient Anesthetized With Desflurane Without Nitrous Oxide: A Case Report

Acute Intraoperative Tympanic Membrane Rupture in Patient Anesthetized With Desflurane Without Nitrous Oxide: A Case Report

Do Intubation Devices Affect Middle Ear Pressure Dynamics?

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