Thoracic-Esophageal Cross-Section
SGB Involuntary Suction
Simulation Phase Scrubber
Phase 1 / 4 (0.0s)
1. Diaphragm Pull (Vacuum)
2. UES Inflow (Suction)
3. Esophageal Balloon
4. Retrograde Belch
Pathophysiology Insight: Unlike classic gastric belching where the stomach vents air via transient LES relaxation, Supragastric Belching is an involuntary behavioral cycle. Rapid diaphragmatic descent drops intrathoracic pressure to negative levels, sucking ambient air into the esophagus before it ever enters the stomach, followed by immediate expulsion.
High-Resolution Esophageal Manometry & Impedance
Intrathoracic Pressure
-12 cmH₂O
Negative Vacuum
Impedance Drop
1,200 Ω
Rapid Air Influx
Suction Inhibition
12%
Loop Active
Subglottic Stability
18%
Glottis Open