Using a mac 3 blade for intubating patient, the anesthesiologist was attempting to visualize the patient's airway.On placing the laryngoscope in the mouth and lifting the scope upwards, the light on the laryngoscope went out.Laryngoscope fail.Tested prior to patient use and it was functioning properly.Went to intubate and did not work.Got the 2nd laryngoscope out of the drawer and that one failed also.Laryngoscope worked when testing during room set up, failed when used to intubate patient.This has been happening more frequently.Of note, the scope light works correctly when upright and no pressure is applied to blade.However, when held in an inverted position and the blade is inserted in patient's mouth, the downward pressure on the blade seems to separate the electrical connection between blade and light carrier in the handle.
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