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Chapter 5. Aspiration: Risks and Prevention
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How much cricoid pressure has been shown to prevent gastric regurgitation?
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(C) 30 N is more than enough to prevent regurgitation into the pharynx in most patients. Pressures of greater than 30 N (approximately 3 kg, or 7 lb) are unlikely to be necessary. The originally described forces (40 N) would rarely be necessary to prevent gastric regurgitation.
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Which of the following is NOT true about cricoid pressure and airway techniques?
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A. The difficulty in ventilation using the LMA is dependent on the amount of pressure applied.
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B. Cricoid pressure reduces the incidence of gastric insufflation when using an LMA.
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C. Improper LMA placement can occur when cricoid pressure is applied.
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D. Ventilation via a face mask has not been shown to be affected by cricoid pressure.
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E. In the event of difficulty with laryngoscopy, cricoid pressure should be released.
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(D) All of the statements about cricoid pressure and airway techniques are true, including cricoid pressure can also affect ventilation via a face mask.
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Which of the following is NOT a known factor that increases the risk of aspiration?
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(E) All except young children are known factors that increase the risk of aspiration.