Positive Predictive Value of the Dx-pH Probe for Predicting PPI Response in LPR

NCT01755221 | Completed

• 1 other identifier: 71707
• Study Type: observational
• Target: 42
• Locations: 1 country
• Sites: 1

Brief 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.

Conditions

Laryngopharyngeal Reflux (LPR); Extraesophageal Reflux; Reflux Laryngitis; Posterior Laryngitis

Keywords

Laryngopharyngeal reflux (LPR); Extraesophageal reflux; Reflux laryngitis; Posterior laryngitis; Proton pump inhibitor (PPI) medication; Restech pH probe

Outcome Measures

Primary Outcomes (2)

• 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

• 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 Outcomes (2)

• Differences in pH between PPI responders and non-responders

  8-12 weeks after initial clinic visit

• Effects of PPI therapy on reflux events

  8-12 weeks after initial clinic visit

Study Arms (1)

Adult patients with Reflux Symptom Index scores (RSI) greater than or equal to 13 off PPI therapy

1. Restech pH probe placement at initial clinic visit; subject returns 24 hrs later for probe removal. 2. Proton pump inhibitor (PPI) therapy; subject starts PPI medication (omeprazole 40mg once daily) and returns for follow-up visit 8-12 weeks later. 3. Optional second pH probe placement at follow up visit; Subject returns 24 hours later for probe removal; Subject continues PPI medication for 2 more weeks

Eligibility Criteria

• Age: 18 Years - 89 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

People receiving care at Northwestern Medicine for laryngeal symptoms

You may qualify if:

• 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

You may not qualify if:

• 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)

Sponsors & Collaborators

• Northwestern University: lead
• Respiratory Technology Corporation: collaborator

Study Sites (1)

Northwestern Medical Faculty Foundation (NMFF) Sinus and Allergy Center

Chicago, Illinois, 60611, United States

Location

Related Publications (11)

• 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.

  PMID: 12160267 BACKGROUND

• 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.

  PMID: 12150380 BACKGROUND

• 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.

  PMID: 11404607 BACKGROUND

• 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.

  PMID: 15128336 BACKGROUND

• 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.

  PMID: 15180717 BACKGROUND

• 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.

  PMID: 19786155 BACKGROUND

• 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.

  PMID: 22301104 BACKGROUND

• 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.

  PMID: 19421822 BACKGROUND

• 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.

  PMID: 22450948 BACKGROUND

• 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 Laryngeal Symptoms. Am J Gastroenterol. 2016 Nov;111(11):1517-1524. doi: 10.1038/ajg.2016.145. Epub 2016 Apr 19.

  PMID: 27091320 RESULT

• 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 Volunteers and Subjects With Symptoms of Laryngeal Irritation. Clin Gastroenterol Hepatol. 2016 Apr;14(4):535-542.e2. doi: 10.1016/j.cgh.2015.11.017. Epub 2015 Dec 9.

  PMID: 26689899 RESULT

MeSH Terms

Conditions

Laryngopharyngeal Reflux

Condition Hierarchy (Ancestors)

Gastroesophageal Reflux; Esophageal Motility Disorders; Deglutition Disorders; Esophageal Diseases; Gastrointestinal Diseases; Digestive System Diseases; Laryngeal Diseases; Respiratory Tract Diseases

Study Officials

• Bruce Tan, MD

  Northwestern University

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: December 18, 2012
• First Posted: December 24, 2012
• Study Start: August 1, 2012
• Primary Completion: November 1, 2014
• Study Completion: August 1, 2016
• Last Updated: April 24, 2024

Record last verified: 2024-04

Locations

US (1)