Manometry is the study where a pressure sensing thin probe is passed from the nose or anus to study the pressure of esophagus, lower esophageal sphincter, rectum and anal canal
Esophageal Manometry is performed by nasal route, to study the pressure in esophagus and lower esophageal sphincter
24 hour pH study is indicated in patients with suspected gatroesophageal reflux disease. 24 hour pH study is an ambulatory study, where pH probe is passes through the nose to lower esophagus, probe has to be kept in situ for 24 hours. All the reflux episodes from stomach to esophagus leads to change in esophageal pH, which are sensed by pH probe, and are recorded in data recorder, which is later studied
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