Dissertation
Dissertation > Medicine, health > Surgery > Of surgery > Science in the neck outside the

Clinical Study on Ultrasound for the Localization of Laryngeal Mask Airway in Adults

Author ZhouZhenFeng
Tutor YanMin
School Zhejiang University
Course Anesthesiology
Keywords ultrasound fiberoptic bronchoscope laryngeal mask airway
CLC R653
Type Master's thesis
Year 2013
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Objective:To evaluate the role of the ultrasound examination in detecting the correct placement of the Laryngeal Mask Airways (LMA).Methods:58ASA I and II patients scheduled for gynecological operation under general anesthesia underwent standard general anesthetic technique with4#LMA-ClassicTM. In all patients, the position of the laryngeal mask was judged satisfiedly by the clinical assessment. First, the position was confirmed by the ultrasound and the results was recorded.Later on a second anesthesiologist performed fiberoptic bronchoscope (FOB) to estimate LMA’s position. The third anesthesiologist evaluated the oropharyngeal leak pressure (OLP)、peak airway pressure (PIP) and reported adverse events. Results:When the position of the laryngeal mask was judged satisfiedly by the clinical assessment, for the FOB assessment, accuracy was59%(38/58); for the ultrasound assessment, accuracy was69%(40/58). It showed that there was no statistically significant difference in detecting ideal position of the LMA by ultrasound or FOL examination assessment (P>0.05), Ultrasound could improve OLP more (P<0.05), which showed it could better reflect the adequacy of laryngeal seal than FOB.Conclusion:It is possible to reflect the position of the LMA by Ultrasound examination.Ultrasound examination could better improve the laryngeal mask seal than FOB, which would help improve ventilation conditions.

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