Fujiwara, S, Ono, T, Minagi, Y, Fujiu-Kurachi, M, Hori, K, Maeda, Y, Boroumand, S, Nitschke, I, Ursula, V, Bohlender, J. Effect of Supraglottic and Super-supraglottic swallows on Tongue Pressure Production against Hard Palate. Dysphagia (2014) 29:655-662.
The Super- and Supraglottic Swallows are maneuvers used to assist in early airway closure to prevent food or drink from being aspirated prior to the swallow.
Participants: 19 healthy young staff members of the University of Zurich Dental School (13 females, 6 males) with an age range from 17-40.
Equipment: Tongue pressure measurements were recorded using the Swallow Scan System using a pressure sensor that forms a “T” shape following the curve of the palate. Participants were seated upright with their heads immobilized by a head rest.
Procedure: This study looked at normal swallow, Supraglottic Swallow (ss) and Super-Supraglottic Swallow (sss). Each participant swallowed 5 ml of water at room temperature. For the SS, a syringe was used to inject 5 ml of water into the floor of the oral cavity with the instructions “breathe through your nose, then hold your breath lightly before and during swallowing. Cough immediately after you finish swallowing.” For the SSS the same procedure and instructions were given, plus the additional instruction to put the palms of their hands together in front of their chest and press them hard against each other while they held their breath.
Results: The perimeters measured were: duration, maximal magnitude and integrated value of tongue pressure during swallowing. “The duration of tongue pressure was significantly longer at the anterior-median part of the hard palate during both SS and SSS than with normal wet swallow. The maximal magnitude increased significantly only at the posterior part of the hard palate during SS, but at all points during SSS.” Not only do the SS and SSS increase protection of the airway prior to the swallow, they may also function to strengthen the tongue.