A cuff pressure controller for the laryngeal masks and tracheal tubes

摘要

A cuff pressure controller for trachea tubes and the laryngeal masks, consists of a modified 10 ml plastic syringe B4/B. The plunger of the syringe was replaced with a metal (screw) bolt B3/B. The bung B5/B of the original plunger was fixed to one end of the metal bolt. A flat washer and gland nut B2/B were screwed over the metal bolt so that the resulting plunger can be rotated forward and backward inside the syringe barrel in a controlled fashion. Rotation of plunger anti-clockwise moves the plunger backward creating a space (external cuff reservoir) in the syringe where excess air from an over-inflated cuff can be vented to control its pressure. Monitoring and control of the pressure may be achieved using a pressure gauge B9/B in line with the cuff and the modified syringe.