Applying High Resolution Impedance Manometry for Perioperative Swallowing Changes in Older Patients Receiving Endotracheal Intubation or Supraglottic Airway Devices During Orthopedic Surgery

We aimed to investigate whether patients with tracheal intubation has high hypopharyngeal pressure than patients with supraglottic airway does by using high resolution impedance manometry. We expected that the patients with endotracheal intubation have higher hypopharyngeal pressure than the patients with supraglottic airway devices.