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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT01755221
Other study ID # 71707
Secondary ID
Status Completed
Phase
First received
Last updated
Start date August 2012
Est. completion date August 2016

Study information

Verified date April 2024
Source Northwestern University
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The purpose of this research study is to better understand whether information obtained from a pH probe can help physicians predict whether a patient will respond to the medication that is prescribed for laryngopharyngeal reflux (LPR). The current treatment given to individuals who are diagnosed with LPR is a course of proton pump inhibitor (PPI) medication. Subjects who agree to participate in this study will have a small flexible tube (about the width of a piece of cooked spaghetti) placed in their throat. This tube measures the pH in the throat over a period of 24 hours and helps physicians study the relationship between pH level, LPR symptoms, and the effectiveness of PPI therapy. This study may help physicians find out if certain symptoms or characteristics can help them predict if the PPI medication will be effective for each patient. After probe removal, subjects will receive compensation. They will return to the clinic at their regularly scheduled follow-up visit with the physician, 8 to 12 weeks after starting the PPI medication. At that time, subjects can choose to participate in an optional probe placement.


Description:

The purpose of this research study is to better understand whether information obtained from a pH probe can help physicians predict whether a patient will respond to the medication that is prescribed for laryngopharyngeal reflux (LPR). The current treatment given to individuals who are diagnosed with LPR is a course of proton pump inhibitor (PPI) medication. This medication reduces the amount of gastric acid that is produced and generally leads to symptom relief. In order to study whether the pH probe can help physicians predict if the patient will respond to PPI therapy, the physicians will measure the pH level of patients' throats before they start PPI medication. Subjects who agree to participate in this study will have a small flexible tube (about the width of a piece of uncooked spaghetti) placed in their throat. The physician will place the tube through the nose until the tip is in the back of the throat, high enough so that the patient will not feel it when they talk, eat, drink, or swallow. This tube measures the pH in the throat over a period of 24 hours and helps physicians study the relationship between pH level, LPR symptoms, and the effectiveness of PPI therapy. This study may help physicians find out if certain symptoms or characteristics can help them predict if the PPI medication will be effective for each patient. After probe removal, subjects will receive compensation. They will return to the clinic at their regularly scheduled follow-up visit with the physician, 8 to 12 weeks after starting the PPI medication. At that time, subjects can choose to participate in an optional probe placement.


Recruitment information / eligibility

Status Completed
Enrollment 42
Est. completion date August 2016
Est. primary completion date November 2014
Accepts healthy volunteers No
Gender All
Age group 18 Years to 89 Years
Eligibility Inclusion Criteria: - Patients presenting for evaluation for symptoms classically associated with LPR with a Reflux Symptom Index (RSI) of greater than or equal to 13. The most common symptoms associated with LPR include hoarseness, throat clearing, globus sensation, nocturnal laryngospasm, postnasal drip, chronic cough, and dysphagia. - Symptom duration of greater than 1 month - Ages 18-89 Exclusion Criteria: - Pre-existing PPI therapy for any indication within two weeks of Dx-pH probe placement visit - Presence of findings of alternative diagnosis explaining symptoms e.g.: laryngeal mass, objective post nasal drainage - Contraindication to PPI therapy (i.e.: atrophic gastritis, liver problems, severe bloody diarrhea from antibiotics, osteoporosis, broken bone) or unwillingness to initiate PPI therapy - Pregnancy: There is no contraindication for the Restech pH probe and pregnancy; however, PPI use in pregnant women is contraindicated and thus pregnant women would be ineligible to participate in this study because they would be unable to complete a course of omeprazole. - Unwillingness or inability to undergo 24 hour pharyngeal pH probe monitoring (for example, oxygen wearing requirement that prevents probe placement or anatomical preclusions like septal perforation). - Bleeding disorder and/or unable to stop use of anticoagulants such as aspirin, Coumadin (warfarin), and/or Plavix (clopidogrel)

Study Design


Locations

Country Name City State
United States Northwestern Medical Faculty Foundation (NMFF) Sinus and Allergy Center Chicago Illinois

Sponsors (2)

Lead Sponsor Collaborator
Northwestern University Respiratory Technology Corporation

Country where clinical trial is conducted

United States, 

References & Publications (11)

Ali T, Roberts DN, Tierney WM. Long-term safety concerns with proton pump inhibitors. Am J Med. 2009 Oct;122(10):896-903. doi: 10.1016/j.amjmed.2009.04.014. — View Citation

Ayazi S, Lipham JC, Hagen JA, Tang AL, Zehetner J, Leers JM, Oezcelik A, Abate E, Banki F, DeMeester SR, DeMeester TR. A new technique for measurement of pharyngeal pH: normal values and discriminating pH threshold. J Gastrointest Surg. 2009 Aug;13(8):1422-9. doi: 10.1007/s11605-009-0915-6. Epub 2009 May 7. — View Citation

Becker V, Graf S, Schlag C, Schuster T, Feussner H, Schmid RM, Bajbouj M. First agreement analysis and day-to-day comparison of pharyngeal pH monitoring with pH/impedance monitoring in patients with suspected laryngopharyngeal reflux. J Gastrointest Surg. 2012 Jun;16(6):1096-101. doi: 10.1007/s11605-012-1866-x. Epub 2012 Mar 27. — View Citation

Belafsky PC, Postma GN, Koufman JA. Laryngopharyngeal reflux symptoms improve before changes in physical findings. Laryngoscope. 2001 Jun;111(6):979-81. doi: 10.1097/00005537-200106000-00009. — View Citation

Belafsky PC, Postma GN, Koufman JA. Validity and reliability of the reflux symptom index (RSI). J Voice. 2002 Jun;16(2):274-7. doi: 10.1016/s0892-1997(02)00097-8. — View Citation

Branski RC, Bhattacharyya N, Shapiro J. The reliability of the assessment of endoscopic laryngeal findings associated with laryngopharyngeal reflux disease. Laryngoscope. 2002 Jun;112(6):1019-24. doi: 10.1097/00005537-200206000-00016. — View Citation

Friedman M, Hamilton C, Samuelson CG, Kelley K, Taylor R, Darling R, Taylor D, Fisher M, Maley A. The value of routine pH monitoring in the diagnosis and treatment of laryngopharyngeal reflux. Otolaryngol Head Neck Surg. 2012 Jun;146(6):952-8. doi: 10.1177/0194599812436952. Epub 2012 Feb 2. — View Citation

Kawamura O, Aslam M, Rittmann T, Hofmann C, Shaker R. Physical and pH properties of gastroesophagopharyngeal refluxate: a 24-hour simultaneous ambulatory impedance and pH monitoring study. Am J Gastroenterol. 2004 Jun;99(6):1000-10. doi: 10.1111/j.1572-0241.2004.30349.x. — View Citation

Williams RB, Szczesniak MM, Maclean JC, Brake HM, Cole IE, Cook IJ. Predictors of outcome in an open label, therapeutic trial of high-dose omeprazole in laryngitis. Am J Gastroenterol. 2004 May;99(5):777-85. doi: 10.1111/j.1572-0241.2004.04151.x. — View Citation

Yadlapati R, Adkins C, Jaiyeola DM, Lidder AK, Gawron AJ, Tan BK, Shabeeb N, Price CP, Agrawal N, Ellenbogen M, Smith SS, Bove M, Pandolfino JE. Abilities of Oropharyngeal pH Tests and Salivary Pepsin Analysis to Discriminate Between Asymptomatic Voluntee — View Citation

Yadlapati R, Pandolfino JE, Lidder AK, Shabeeb N, Jaiyeola DM, Adkins C, Agrawal N, Cooper A, Price CP, Ciolino JD, Gawron AJ, Smith SS, Bove M, Tan BK. Oropharyngeal pH Testing Does Not Predict Response to Proton Pump Inhibitor Therapy in Patients with L — View Citation

* Note: There are 11 references in allClick here to view all references

Outcome

Type Measure Description Time frame Safety issue
Primary RSI Score Change from baseline in RSI score at 8-12 weeks after initial clinic visit/initiation of treatment will be used to define a response to PPI therapy 8-12 weeks after initial clinic visit
Primary Global improvement in self-reported symptoms Change from baseline in global improvement in self-reported symptoms at 8-12 weeks after initial clinic visit/initiation of treatment will be used to define response to PPI therapy 8-12 weeks after initial clinic visit
Secondary Differences in pH between PPI responders and non-responders The Ryan score, total time (as a percent) and number of events below a pH of 4, 5, 6, and 7 will be compared between PPI responders and non-responders. 8-12 weeks after initial clinic visit
Secondary Effects of PPI therapy on reflux events All subjects will have the option of a second pH probe placement at the follow up clinic visit 8-12 weeks after the initial clinic visit to assess the effects of PPI therapy on reflux events. 8-12 weeks after initial clinic visit
See also
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Recruiting NCT04984304 - Individualized Diagnosis and Treatment of Extraesophageal Reflux in Patients With Chronic Cough N/A