pH study

pH study

12 to 24 hr pH study GI disease A procedure that places a probe in the distal esophagus, to evaluate acid reflux and the need for medical or surgical therapy Indications Suspected or evaluate therapy for GERD or nocturnal pulmonary aspiration of gastric contents. See GERD.
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HCl, NaOH (MERK) solution (0.1 M) was prepared for pH study. Glassware was washed with deionized water and dried in oven for use.
pH study (% acidic refux/24 hours) Site Mean SD Range Proximal upright 6.0 6.8 1.0-34.0 Proximal supine 7.9 6.4 1.0-26.0 Distal upright 5.2 5.2 1.0-26.0 Distal supine 8.5 9.1 1.0-52.0 SD: Standard deviation Table 2.
Symptoms of airway obstruction were obtained from chart review during their clinical visit closest to time of the esophageal pH study. These symptoms included shortness of breath and dyspnea.
When impedance testing is paired with the dual probe pH study, it provides the most descriptive information.
A pH study was done, in order to define the optimal pH of the chromium biosorption.
Whereas the elucidation of the kinetic process gives information over the mechanisms of sorption [31], the pH study allows us to uncover the optimum condition under which the sorption process is favored.
At another institution, a pH study demonstrated abnormal esophageal acid exposure, and a fundoplication was being considered.
In patients with persistent typical GORD symptoms despite twice daily PPI therapy, standard transnasal oesophageal pH monitoring is most likely to be normal, but where adequate acid suppression is in question, a 24-hour pH study while taking medications can help to quantify the effectiveness of acid control.
Despite the presence of such symptoms, 80%-90% of patients with eosinophilic esophagitis will have a normal 24-hour pH study. "So it does not appear that eosinophilic esophagitis causes abnormal acid reflux," he said at a meeting on skin disorders sponsored by Rady Children's Hospital.
The two most useful tests for children with suspected GERD include a 24-hour esophageal pH study and upper endoscopy, he said.
Six study participants would have been misclassified as normal had their pH study been limited to day 1.