Successful oesophageal pH monitoring with a catheter-free system.
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002404:Catheterization / Q000009:adverse effects; D005260:Female; D005745:Gastric Acidity Determination / Q000295:instrumentation*; D005764:Gastroesophageal Reflux / Q000175:diagnosis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged