Reflux monitoring: role of combined multichannel intraluminal impedance and pH.
Combined multichannel intraluminal impedance and pH (MII-pH) is a promising technique that identifies liquid, gas, and mixed gastroesophageal reflux and categorizes it into acid and nonacid types. Gastroesophageal monitoring using combined MII-pH reconfirms previously reported data that there is a difference between refluxate volume presence time in the esophagus and time pH less than 4. Only one in five patients with persistent symptoms on acid-suppressive therapy have symptoms associated with persistent acid reflux, whereas two of five patients have symptoms associated with nonacid reflux; the remaining patients do not have any type of GER related to their symptoms. Combined MII-pH is a useful tool in evaluating patients with persistent symptoms on acid-suppressive therapy, patients with atypical symptoms, and infants.
Tutuian
Radu
R
Division of Gastroenterology/Hepatology, Medical University of South Carolina, 96 Jonathan Lucas Street, 210 CSB, Charleston, SC 29425, USA. tutuianr@musc.edu
Castell
Donald O
DO
D017097:Electric Impedance; D004945:Esophagoscopy / Q000379:methods; D005764:Gastroesophageal Reflux / Q000175:diagnosis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008365:Manometry / Q000379:methods; D018670:Monitoring, Ambulatory; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods*; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index