Gastric pH Testing
Diagnostics · VEI Clinic, Gangnam, Seoul

Quick Intro
VEI Clinic Apgujeong is an English-friendly internal-medicine clinic that evaluates acid-related symptoms (heartburn, regurgitation, chest discomfort, chronic cough/hoarseness, bloating) and arranges the right test at the right time. In the clinic, we take your history, examine you, and perform targeted labs and H. pylori testing; for specialized measurements (e.g., 24-hour esophageal pH-impedance or wireless Bravo pH), we coordinate with nearby gastroenterology centers and manage results with you.
What We Evaluate
- GERD/acid reflux (typical & atypical symptoms)
- PPI-refractory symptoms (still symptomatic on acid suppressants)
- Pre-procedure needs (e.g., before anti-reflux surgery or endoscopic fundoplication)
- Dyspepsia/bloating and H. pylori concerns
- Low/variable acid questions (we avoid unvalidated “at-home acid tests” and use clinical pathways instead)
Which Tests Are Used (And How We Help)
In-Clinic
- H. pylori testing
- Basic labs (CBC, iron, B12, CMP) to assess complications (e.g., anemia)
- Therapeutic trials (time-limited PPI/H2RA algorithms with de-escalation plans)
- Lifestyle & diet plan (meal timing, trigger mapping, sleep & elevation strategies)
Hospital/Endoscopy Center (Referral & Coordination)
- 24-hour Esophageal pH-Impedance Monitoring (catheter): quantifies acid and non-acid reflux; often used for refractory symptoms or pre-procedural confirmation.
- Wireless “Bravo” pH Capsule (endoscopy-placed): measures esophageal acid exposure without a nasal catheter (typically 48–96 hours).
- High-Resolution Manometry (when indicated): maps motility before certain procedures or when dysphagia is present.
- pH measurement during endoscopy / gastric aspirate (select scenarios): limited role; we’ll advise if truly helpful.
Who This Is For
- Persistent heartburn/regurgitation despite optimized therapy
- Atypical symptoms possibly related to reflux (chronic cough, throat clearing, hoarseness) after ENT/respiratory workup
- Need to confirm reflux before surgery/procedures or long-term medication
- Recurrent dyspepsia/bloating where H. pylori or other causes must be ruled out
Visit Flow
- Baseline consult (20–30 min) – history, exam, meds/supplements review, red-flag screen
- Initial testing – H. pylori, targeted labs; begin a structured therapy trial if appropriate
- Decision point – if symptoms persist or documentation is required, we book pH/impedance (± manometry) with a GI partner
- Results & plan – plain-English summary, step-down/step-up meds, diet & sleep tactics, and when to recheck
Prep for pH Testing
- Your GI team will specify whether to test ON or OFF acid-suppressing meds:
- OFF-therapy study (to diagnose reflux): usually stop PPIs ~7 days, H2 blockers ~48 hours, antacids ~24 hours before the test.
- ON-therapy study (to evaluate refractory symptoms on PPIs): continue meds exactly as instructed.
- Avoid on test day: very acidic/spicy or stain-heavy foods, large meals, and vigorous exercise (center-specific).
- Keep a symptom/meal/position diary during monitoring; it’s essential for interpretation.
- For the Bravo capsule: you’ll need a brief endoscopy for placement; MRI restrictions may apply during the monitoring window.
Do not stop prescription medication without clinician guidance—your plan will be individualized.
After Your Test
- We correlate acid exposure time, reflux episodes, and symptom association probability with your diary.
- Plans may include medication adjustment, lifestyle changes, ENT or pulmonary coordination, or GI referral for procedural options where appropriate.
Safety: When to Use the ER
- Chest pain with sweating/shortness of breath, black/bloody stool, vomiting blood, persistent vomiting with dehydration, sudden difficulty swallowing with drooling, or severe unintentional weight loss.
What to Bring
- Photo ID (passport/ARC)
- Medication & supplement list (exact doses), especially acid suppressants/NSAIDs
- Prior endoscopy, ENT, or imaging reports (PDFs/photos welcome)
- Brief food/symptom log from the last 1–2 weeks (helps us target testing)
Pricing & Transparency
- You’ll receive a clear quote before any test. Costs differ between in-clinic testing and hospital-based studies. Itemized English receipts are available for reimbursement.
Questions
Do you perform the pH probe in-clinic?
We evaluate and coordinate. Esophageal pH/impedance and Bravo studies are performed at partner GI centers; we manage prep and results.
Is there a true “stomach acid level” test?
Direct “gastric acid output” testing is rarely needed. Most patients are best served by pH/impedance (for reflux), H. pylori testing, and a structured medication plan.
How long does monitoring last?
Catheter pH-impedance: ~24 hours. Bravo capsule: 48–96 hours depending on the center.
Can I work during the test?
Usually yes—avoid heavy exercise, follow eating/sleep instructions, and keep the diary.
What if my symptoms occur only at night?
We’ll ensure your diary captures sleep and position changes and discuss bed elevation, meal timing, and medication timing.
Plan your visit
3F, Beneheim City, 162 Apgujeong-ro, Gangnam-gu, Seoul. About a one-minute walk from Exit 5 of Apgujeong Station (Line 3).
- Mon · Thu · Fri
- 10:00 – 19:00
- Tuesday
- 10:00 – 20:00
- Saturday
- 10:00 – 16:00
- Lunch break
- 13:00 – 14:00, except Saturday
- Wed · Sun
- Closed
Bring your passport or ID, a list of medicines and allergies, and any recent results. For chest pain, severe breathing difficulty or signs of stroke, call 119 or go to the nearest emergency department.


