{"type":"rich","version":"1.0","provider_name":"Transistor","provider_url":"https://transistor.fm","author_name":"Board Pearls","title":"Chapter 3, Ep 1 of 2: Mechanisms, Grading, and the Acid-Suppression Ladder","html":"<iframe width=\"100%\" height=\"180\" frameborder=\"no\" scrolling=\"no\" seamless src=\"https://share.transistor.fm/e/b07ef621\"></iframe>","width":"100%","height":180,"duration":1700,"description":"The most useful move at the start of a GERD vignette is to ask what is wrong with the barrier, not how much acid the patient makes. Acid output is usually normal; what fails is the apparatus that keeps acid in the stomach. Hold that frame and the chapter falls into a sequence: barrier anatomy, then grading, then the acid-suppression ladder. The case. A patient with classic heartburn has been on a once-daily PPI taken at bedtime with incomplete relief. Endoscopy shows LA grade B esophagitis. Before escalating the dose, what single change to the regimen is most likely to fix it? Topics coveredThe antireflux barrier: intrinsic LES and crural diaphragm in series, angle of His, intra-abdominal segmentMost GERD patients have a normal resting LES; a hypotensive LES marks severe diseaseTransient LES relaxations (TLESRs) as the dominant reflux mechanismSliding hiatal hernia as the structural amplifier; size cutoffs drive procedure choiceAmerican Foregut Society flap-valve grading in retroflexionLA classification A through D: grading erosive esophagitisLA grade stratifies treatment intensity and Barrett surveillance riskPPI pharmacology: pre-meal dosing, why timing decides efficacyThe acid-suppression ladder: once-daily, twice-daily, and the role of P-CABsWhen endoscopy is confirmatory versus when reflux monitoring is needed Key decisionsPPIs need a meal to work: take 30 to 60 minutes before the first meal, not at bedtime. A mistimed PPI is the commonest reason for apparent failure before any dose escalationA normal resting LES does not exclude GERD: transient LES relaxations carry the reflux, so manometry is not the diagnostic test for refluxLA grade C or D confirms GERD outright and mandates a follow-up scope to assess Barrett after healing; grade A is nonspecific and needs objective reflux testingHiatal hernia size gates the operation: under 2 cm allows TIF, larger hernias need a formal hiatal repairEscalate to twice-daily PPI or a P-CAB before calling reflux truly...","thumbnail_url":"https://img.transistorcdn.com/-FuAdDBcPDLhEoUmroZKtOBRvuBn_FHPpYlh41hOnU4/rs:fill:0:0:1/w:400/h:400/q:60/mb:500000/aHR0cHM6Ly9pbWct/dXBsb2FkLXByb2R1/Y3Rpb24udHJhbnNp/c3Rvci5mbS9iNzlh/ZTU4Y2MzNWExMjQ5/MjA5OWMwMmI3ZTk5/NGFiZS5wbmc.webp","thumbnail_width":300,"thumbnail_height":300}