Effects of three different swallow maneuvers analyzed by videomanometry

Area of Science:

• Deglutition physiology
• Swallowing biomechanics
• Oropharyngeal function

Background:

• Swallowing maneuvers are used to improve safety and efficiency.
• Understanding the manometric effects of these maneuvers is crucial for clinical application.
• Previous research has not fully elucidated the specific pharyngeal and upper esophageal sphincter (UES) effects of different maneuvers.

Purpose of the Study:

• To evaluate the manometric effects of three distinct swallowing maneuvers.
• To compare the impact of supraglottic swallow, super-supraglottic swallow, and Mendelsohn's maneuver on pharyngeal and UES function in healthy volunteers.

Main Methods:

• Simultaneous videoradiography and pharyngeal manometry (videomanometry) were employed.
• Ten healthy volunteers participated in the study.
• Seven manometric and two videoradiographic variables were analyzed for each maneuver.

Main Results:

• The supraglottic swallow demonstrated weaker UES peak contraction.
• Super-supraglottic swallow showed higher UES relaxation pressure.
• Mendelsohn's maneuver resulted in higher UES peak contraction, longer pharyngeal contraction duration, and weaker UES peak contraction. Both super-supraglottic and Mendelsohn maneuvers prolonged bolus transit time.

Conclusions:

• No significant difference in UES relaxation duration was observed across maneuvers compared to a control swallow.
• Mendelsohn's maneuver increased pharyngeal peak contraction and contraction duration.
• These findings suggest Mendelsohn's maneuver may enhance bolus propulsion into the esophagus.