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Patel N, Lin P, Stack M, Conrad JM, Fakioglu H, Abomoelak B, Horvath K, Mehta DI. Oral Care Associated With Less Microaspiration in Ventilated Cardiac Patients. JPGN REPORTS 2023; 4:e290. [PMID: 37181916 PMCID: PMC10174743 DOI: 10.1097/pg9.0000000000000290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 09/08/2022] [Indexed: 05/16/2023]
Abstract
Aspiration is common in mechanically ventilated patients and may predispose patients to aspiration pneumonia, chemical pneumonitis, and chronic lung damage. Pepsin A is a specific marker of gastric fluid aspiration and is often detected in ventilated pediatric patients. We investigated the effect of oral care and throat suctioning in the detection of pepsin A in tracheal aspirates (TAs) up to 4 hours after these procedures. Methods Twelve pediatric patients between age 2 weeks to 14 years who underwent intubation for cardiac surgery were enrolled in this study. Six of the 12 patients were consented before their surgery with initial specimen collected at the time of intubation and last one shortly before extubation (intubation duration < 24 hours). The remaining 6 patients were consented after cardiac surgery. All specimens were collected per routine care per respiratory therapy protocol and shortly before extubation (intubation duration > 24 hours). Tracheal fluid aspirates were collected every 4 to 12 hours in the ventilated patients. Enzymatic assay for gastric pepsin A and protein determination were performed. The time of oral care and throat suctioning within 4 hours prior was recorded prospectively. Results A total of 342 TA specimens were obtained from the 12 intubated pediatric patients during their course of hospitalization; 287 (83.9%) showed detectable total pepsin (pepsin A and C) enzyme activity (> 6 ng/mL) and 176 (51.5%) samples had detectable pepsin A enzyme levels (>6 ng/mL of pepsin A). Only 29 samples of 76 samples (38.2%) had evidence of microaspiration after receiving oral care, while 147 of 266 (55.3%) samples were pepsin A positive when no oral care was provided. Odds ratio is 0.50 (Cl 0.30-0.84), and the number needed to treat is 5.8 (Confidence interval 3.4-22.3). Testing air filters for pepsin was not beneficial. Conclusion Oral care is a highly effective measure to prevent microaspiration of gastric fluid in ventilated pediatric patients. The number needed to treat (5.8) suggests this is a very effective prevention strategy. Our study suggests that pepsin A is a useful and sensitive biomarker that allows identification of gastric aspiration.
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Affiliation(s)
- Nishant Patel
- From the Center for Digestive Health and Nutrition, Arnold Palmer Hospital for Children, Orlando, FL
| | - Philip Lin
- From the Center for Digestive Health and Nutrition, Arnold Palmer Hospital for Children, Orlando, FL
| | - Michael Stack
- Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Janet M. Conrad
- Pediatric Gastroenterology and Translational Research Laboratory, Cardiology Arnold Palmer Hospital for Children, Orlando, FL
| | - Harun Fakioglu
- Department of Pediatric Cardiology Arnold Palmer Hospital for Children, Orlando, FL
| | - Bassam Abomoelak
- Pediatric Gastroenterology and Translational Research Laboratory, Cardiology Arnold Palmer Hospital for Children, Orlando, FL
| | - Karoly Horvath
- From the Center for Digestive Health and Nutrition, Arnold Palmer Hospital for Children, Orlando, FL
| | - Devendra I. Mehta
- From the Center for Digestive Health and Nutrition, Arnold Palmer Hospital for Children, Orlando, FL
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Abstract
The aim of this review is to explore the relationship between esophageal syndromes and pulmonary diseases considering the most recent data available. Prior studies have shown a close relationship between lung diseases such as asthma, chronic obstructive pulmonary disorders (COPD), Idiopathic pulmonary fibrosis (IPF), and lung transplant rejection and esophageal dysfunction. Although the association has long been demonstrated, the exact relationship remains unclear. Clinical experience has shown a bidirectional relationship where esophageal disease may influence the outcomes of pulmonary disease and vice versa. The impact of esophageal dysfunction on pulmonary disorders may also be related to 2 different mechanisms: the reflux pathway leading to microaspiration and the reflex pathway triggering vagally mediated airway reactions. The aim of this review is to further explore these relationships and pathophysiologic mechanisms. Specifically, we discuss the proposed hypotheses for the relationship between the 2 diseases, as well as the pathophysiology and new developments in clinical management.
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Talbert S, Bourgault AM, Rathbun KP, Abomoelak B, Deb C, Mehta D, Sole ML. Pepsin A in Tracheal Secretions From Patients Receiving Mechanical Ventilation. Am J Crit Care 2021; 30:443-450. [PMID: 34719715 DOI: 10.4037/ajcc2021528] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
BACKGROUND In patients in the intensive care unit (ICU) receiving mechanical ventilation, aspiration of gastric contents may lead to ventilator-associated events and other adverse outcomes. Pepsin in pulmonary secretions is a biomarker of microaspiration of gastric contents. OBJECTIVES To evaluate the association between tracheal pepsin A and clinical outcomes related to ventilator use. METHODS A subset of 297 patients from a larger clinical trial on aspiration of oral secretions in adults receiving mechanical ventilation consented to have pepsin A measured in their tracheal aspirate samples. A concentration ≥6.25 ng/mL indicated a positive result. Abundant microaspiration was defined as pepsin A in ≥30% of samples. Statistical analyses included analysis of variance, analysis of covariance, and χ2 tests. RESULTS Most patients were White men, mean age 59.7 (SD, 18.8) years. Microaspiration was found in 43.8% of patients (n = 130), with abundant microaspiration detected in 17.5% (n = 52). After acuity was controlled for, patients with tracheal pepsin A had a longer mechanical ventilation duration (155 vs 104 hours, P < .001) and ICU stay (9.9 vs 8.2 days, P = .04), but not a longer hospital stay. CONCLUSIONS Microaspiration of gastric contents occurred in nearly half of patients and was associated with a longer duration of mechanical ventilation and a longer stay in the ICU. Additional preventative interventions beyond backrest elevation, oropharyngeal suctioning, and management of endotracheal tube cuff pressure may be needed. Also, the timing of pepsin measurements to capture all microaspiration events requires additional exploration.
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Affiliation(s)
- Steven Talbert
- Steven Talbert is interim director of the nursing PhD program and a clinical assistant professor, University of Central Florida College of Nursing, Orlando, Florida
| | - Annette M. Bourgault
- Annette M. Bourgault is an associate professor, University of Central Florida College of Nursing and a nurse scientist, Orlando Health, Orlando, Florida
| | - Kimberly Paige Rathbun
- Kimberly Paige Rathbun is a graduate research assistant, University of Central Florida College of Nursing
| | - Bassam Abomoelak
- Bassam Abomoelak is a senior research associate, Pediatric Specialty Diagnostic Laboratory, Arnold Palmer Hospital, Orlando, Florida
| | - Chirajyoti Deb
- Chirajyoti Deb is a senior research associate, Pediatric Specialty Diagnostic Laboratory
| | - Devendra Mehta
- Devendra Mehta is a pediatric gastroenterologist, Pediatric Specialty Diagnostic Laboratory
| | - Mary Lou Sole
- Mary Lou Sole is dean, professor, and Orlando Health Endowed Chair in Nursing, University of Central Florida College of Nursing and clinical scientist, Orlando Health
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Abstract
Microaspiration, or silent aspiration, is commonly suspected in patients with refractory respiratory symptoms, including unexplained chronic cough, asthma, chronic obstructive pulmonary disease, bronchiolitis, bronchiectasis, and idiopathic pulmonary fibrosis. This suspicion is driven by the high prevalence of gastroesophageal reflux in these otherwise disparate disorders. Frequently, patients receive aggressive treatment for gastroesophageal reflux disease as a means of treating their underlying respiratory conditions, even in the absence of overt symptoms of reflux. However, clinical trials have not demonstrated a clear impact on outcomes with this strategy, and in some instances there may be potential for harm. Mechanistic studies have increasingly used gastric biomarkers obtained directly from the airways to confirm the association between reflux and respiratory disease, but results are limited by methodologic flaws and correlation. The best evidence of aspiration directly causing respiratory disorders is the histopathologic detection of foreign bodies. For most of the other chronic respiratory disorders, microaspiration may be uncommon or a secondary aggravating factor, as in patients with acute exacerbations of chronic obstructive pulmonary disease or idiopathic pulmonary fibrosis. In some cases, microaspiration is probably not a significant factor at all, such as in unexplained chronic cough. It is important to distinguish between conditions in which aspiration is primarily or directly causal and conditions in which aspiration may be indirectly aggravating, to help identify whether interventions targeting reflux and aspiration precautions should be recommended to patients. Our clinical review examines some of the evidence supporting reflux-aspiration as a mechanism for several chronic respiratory disorders and offers some management considerations when reflux-aspiration is suspected.
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Promotion of Regular Oesophageal Motility to Prevent Regurgitation and Enhance Nutrition Intake in Long-Stay ICU Patients. A Multicenter, Phase II, Sham-Controlled, Randomized Trial: The PROPEL Study. Crit Care Med 2020; 48:e219-e226. [PMID: 31904685 DOI: 10.1097/ccm.0000000000004176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVES To evaluate the effect of esophageal stimulation on nutritional adequacy in critically ill patients at risk for enteral feeding intolerance. DESIGN A multicenter randomized sham-controlled clinical trial. SETTING Twelve ICUs in Canada. PATIENTS We included mechanically ventilated ICU patients who were given moderate-to-high doses of opioids and expected to remain alive and ventilated for an additional 48 hours and who were receiving enteral nutrition or expected to start imminently. INTERVENTIONS Patients were randomly assigned 1:1 to esophageal stimulation via an esophageal stimulating catheter (E-Motion Tube; E-Motion Medical, Tel Aviv, Israel) or sham treatment. All patients were fed via these catheters using a standardized feeding protocol. MEASUREMENTS AND MAIN RESULTS The co-primary outcomes were proportion of caloric and protein prescription received enterally over the initial 7 days following randomization. Among 159 patients randomized, the modified intention-to-treat analysis included 155 patients: 73 patients in the active treatment group and 82 in the sham treatment group. Over the 7-day study period, the percent of prescribed caloric intake (± SE) received by the enteral route was 64% ± 2 in the active group and 65% ± 2 in sham patients for calories (difference, -1; 95% CI, -8 to 6; p = 0.74). For protein, it was 57% ± 3 in the active group and 60% ± 3 in the sham group (difference, -3; 95% CI, -10 to 3; p = 0.30). Compared to the sham group, there were more serious adverse events reported in the active treatment group (13 vs 6; p = 0.053). Clinically important arrhythmias were detected by Holter monitoring in 36 out of 70 (51%) in the active group versus 22 out of 76 (29%) in the sham group (p = 0.006). CONCLUSIONS Esophageal stimulation via a special feeding catheter did not improve nutritional adequacy and was associated with increase risk of harm in critically ill patients.
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Talbert S, Detrick CW, Emery K, Middleton A, Abomoelak B, Deb C, Mehta DI, Sole ML. Intubation Setting, Aspiration, and Ventilator-Associated Conditions. Am J Crit Care 2020; 29:371-378. [PMID: 32869069 DOI: 10.4037/ajcc2020129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
BACKGROUND Patients experience endotracheal intubation in various settings with wide-ranging risks for postintubation complications such as aspiration and ventilator-associated conditions. OBJECTIVES To evaluate associations between intubation setting, presence of aspiration biomarkers, and clinical outcomes. METHODS This study is a subanalysis of data from the NO-ASPIRATE single-blinded randomized clinical trial. Data were prospectively collected for 513 adult patients intubated within 24 hours of enrollment. Patients with documented aspiration events at intubation were excluded. In the NO-ASPIRATE trial, intervention patients received enhanced oropharyngeal suctioning every 4 hours and control patients received sham suctioning. Tracheal specimens for α-amylase and pepsin tests were collected upon enrollment. Primary outcomes were ventilator hours, lengths of stay, and rates of ventilator-associated conditions. RESULTS Of the baseline tracheal specimens, 76.4% were positive for α-amylase and 33.1% were positive for pepsin. Proportions of positive tracheal α-amylase and pepsin tests did not differ significantly between intubation locations (study hospital, transfer from other hospital, or field intubation). No differences were found for ventilator hours or lengths of stay. Patients intubated at another hospital and transferred had significantly higher ventilator-associated condition rates than did those intubated at the study hospital (P = .02). Ventilator-associated condition rates did not differ significantly between patients intubated in the field and patients in other groups. CONCLUSIONS Higher ventilator-associated condition rates associated with interhospital transfer may be related to movement from bed, vehicle loading and unloading, and transport vehicle vibrations. Airway assessment and care may also be suboptimal in the transport environment.
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Affiliation(s)
- Steven Talbert
- Steven Talbert is an assistant clinical professor, Christine Wargo Detrick is a doctoral student, and Kimberly Emery is a doctoral candidate, University of Central Florida College of Nursing, Orlando, Florida
| | - Christine Wargo Detrick
- Steven Talbert is an assistant clinical professor, Christine Wargo Detrick is a doctoral student, and Kimberly Emery is a doctoral candidate, University of Central Florida College of Nursing, Orlando, Florida
| | - Kimberly Emery
- Steven Talbert is an assistant clinical professor, Christine Wargo Detrick is a doctoral student, and Kimberly Emery is a doctoral candidate, University of Central Florida College of Nursing, Orlando, Florida
| | - Aurea Middleton
- Aurea Middleton is a clinical research coordinator, Orlando Regional Medical Center, Orlando, Florida
| | - Bassam Abomoelak
- Bassam Abomoelak is a senior research associate and Chirajyoti Deb is a senior research scientist, Gastrointestinal Translational Laboratory, Arnold Palmer Hospital, Orlando Health, Orlando
| | - Chirajyoti Deb
- Chirajyoti Deb is a senior research scientist, Gastrointestinal Translational Laboratory, Arnold Palmer Hospital, Orlando Health, Orlando
| | - Devendra I. Mehta
- Devendra I. Mehta is an associate professor at Florida State University and director of the Gastrointestinal Translational Laboratory, Arnold Palmer Hospital for Children, Orlando Health
| | - Mary Lou Sole
- Mary Lou Sole is dean, Orlando Health Endowed Chair in Nursing, and University of Central Florida Pegasus Professor, University of Central Florida College of Nursing
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7
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Chan WW, Ahuja N, Fisichella PM, Gavini S, Rangan V, Vela MF. Extraesophageal syndrome of gastroesophageal reflux: relationships with lung disease and transplantation outcome. Ann N Y Acad Sci 2020; 1482:95-105. [PMID: 32808313 DOI: 10.1111/nyas.14460] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 07/05/2020] [Accepted: 07/15/2020] [Indexed: 12/14/2022]
Abstract
Gastroesophageal reflux disease (GERD) is prevalent and may be associated with both esophageal and extraesophageal syndromes, which include various pulmonary conditions. GERD may lead to pulmonary complications through the "reflux" (aspiration) or "reflex" (refluxate-triggered, vagally mediated airway spasm) mechanisms. While GERD may cause or worsen pulmonary disorders, changes in respiratory mechanics due to lung disease may also increase reflux. Typical esophageal symptoms are frequently absent and objective assessment with reflux monitoring is often needed for diagnosis. Impedance monitoring should be considered in addition to traditional pH study due to the involvement of both acidic and weakly acidic/nonacidic reflux. Antireflux therapy may improve outcomes of some pulmonary complications of GERD, although careful selection of a candidate is paramount to successful outcomes. Further research is needed to identify the optimal testing strategy and patient phenotypes that would benefit from antireflux therapy to improve pulmonary outcomes.
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Affiliation(s)
- Walter W Chan
- Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Nitin Ahuja
- Division of Gastroenterology and Hepatology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - P Marco Fisichella
- Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Sravanya Gavini
- Division of Digestive and Liver Diseases, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Vikram Rangan
- Division of Gastroenterology, Hepatology, and Nutrition, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Marcelo F Vela
- Division of Gastroenterology and Hepatology, Mayo Clinic, Scottsdale, Arizona
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8
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Kim Y, Lee YJ, Cho YJ, Yoon HI, Lee JH, Lee CT, Park JS. Association between Pepsin in Bronchoalveolar Lavage Fluid and Prognosis of Chronic Fibrosing Interstitial Lung Disease. TOHOKU J EXP MED 2018; 246:147-153. [PMID: 30405002 DOI: 10.1620/tjem.246.147] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Chronic fibrosing interstitial lung disease (ILD)s are characterized by chronic progressive fibrosis of lung which include idiopathic pulmonary fibrosis (IPF), nonspecific interstitial pneumonia (NSIP), and connective tissue disease-associated interstitial lung disease (CTD-ILD). IPF is an irreversible fibrotic lung disease which results in respiratory failure. Although NSIP and CTD-ILD can be improved or stable by treatment with corticosteroid or immunosuppressant, some of them progress to fibrotic lung diseases. Aspiration of gastric contents is suggested as an aggravating factor of ILDs. We measured pepsin, a marker of gastric aspiration, in bronchoalveolar lavage (BAL) fluid of chronic fibrosing ILD patients to evaluate the association between BAL fluid pepsin and prognosis of chronic fibrosing ILDs. Patients with chronic fibrosing ILDs, who underwent bronchoscopy between December 2010 and April 2015 were prospectively enrolled. Pepsin levels were measured using a commercial ELISA kit. Clinical characteristics, lung function data, and mortality were analyzed. Fifty-one patients with chronic fibrosing ILDs were enrolled (26 with IPF, 15 with NSIP, and 10 with CTD-ILD). Pepsin levels in BAL fluid were 69.87 ± 74.16 ng/mL in IPF, 110.68 ± 94.93 ng/mL in NSIP, and 101.87 ± 88.44 ng/mL in CTD-ILDs. There were no statistically significant differences in BAL fluid pepsin levels among patients with the different chronic fibrosing ILDs. In multivariate regression analysis, higher BAL pepsin levels were associated with higher mortality (adjusted odds ratio [aOR] = 1.021, p = 0.025). BAL fluid pepsin may be used as a prognostic marker for predicting mortality in chronic fibrosing ILD patients.
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Affiliation(s)
- Youlim Kim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital.,Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital
| | - Yeon Joo Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital.,Department of Internal Medicine, Seoul National University College of Medicine
| | - Young-Jae Cho
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital.,Department of Internal Medicine, Seoul National University College of Medicine
| | - Ho Il Yoon
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital.,Department of Internal Medicine, Seoul National University College of Medicine
| | - Jae Ho Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital.,Department of Internal Medicine, Seoul National University College of Medicine
| | - Choon-Taek Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital.,Department of Internal Medicine, Seoul National University College of Medicine
| | - Jong Sun Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital.,Department of Internal Medicine, Seoul National University College of Medicine
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9
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Lee AS, Ryu JH. Aspiration Pneumonia and Related Syndromes. Mayo Clin Proc 2018; 93:752-762. [PMID: 29730088 DOI: 10.1016/j.mayocp.2018.03.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/12/2018] [Accepted: 03/14/2018] [Indexed: 01/08/2023]
Abstract
Aspiration is a syndrome with variable respiratory manifestations that span acute, life-threatening illnesses, such as acute respiratory distress syndrome, to chronic, sometimes insidious, respiratory disorders such as aspiration bronchiolitis. Diagnostic testing is limited by the insensitivity of histologic testing, and although gastric biomarkers for aspiration are increasingly available, none have been clinically validated. The leading mechanism for microaspiration is thought to be gastroesophageal reflux disease, largely driven by the increased prevalence of gastroesophageal reflux across a variety of respiratory disorders, including chronic obstructive pulmonary disease, asthma, idiopathic pulmonary fibrosis, and chronic cough. Failure of therapies targeting gastric acidity in clinical trials, in addition to increasing concerns about both the overuse of and adverse events associated with proton pump inhibitors, raise questions about the precise mechanism and causal link between gastroesophageal reflux and respiratory disease. Our review summarizes key aspiration syndromes with a focus on reflux-mediated aspiration and highlights the need for additional mechanistic studies to find more effective therapies for aspiration syndromes.
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Affiliation(s)
- Augustine S Lee
- Division of Pulmonary, Allergy and Sleep Medicine, Mayo Clinic, Jacksonville, FL.
| | - Jay H Ryu
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN
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Imam SS, Shinkar DM, Mohamed NA, Mansour HE. Effect of right lateral position with head elevation on tracheal aspirate pepsin in ventilated preterm neonates: randomized controlled trial. J Matern Fetal Neonatal Med 2018; 32:3741-3746. [PMID: 29768111 DOI: 10.1080/14767058.2018.1471674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Objective: To evaluate the effect of right lateral positioning in comparison with supine positioning on tracheal aspirate pepsin levels as a marker of aspiration of gastric contents in ventilated preterm neonates. Study design: This randomized controlled trial was conducted on 60 ventilated preterm neonates <35 weeks; 30 neonates were nursed in right lateral position for 6 hours while the other 30 neonates were nursed in supine position for 6 hours. Tracheal aspirate sample was obtained from each neonate in both the groups just after the end of 6 hours and pepsin level was measured. Results: Neonates in right lateral position group had significantly lower tracheal pepsin level than neonates in supine position group (6 ng/ml) interquartile range [IQR] (3-20) versus 15 ng/ml [IQR] (5.5-90) (p = .024). There is positive correlation between tracheal aspirate pepsin level and fraction of inspired oxygen (FiO2) needed during the intervention (r = 0.383, p = .040). There is no correlation between tracheal pepsin level and gestational age, birth weight, or duration of mechanical ventilation and other ventilatory settings. Conclusion: Nursing ventilated premature infants in right lateral position is associated with decreased aspiration of gastric contents.
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Affiliation(s)
- Safaa Shafik Imam
- a Pediatrics Department, Faculty of Medicine , Ain Shams University , Cairo , Egypt
| | - Dina Mohamed Shinkar
- a Pediatrics Department, Faculty of Medicine , Ain Shams University , Cairo , Egypt
| | - Nevine Ahmed Mohamed
- b Clinical Pathology Department, Faculty of Medicine , Ain Shams University , Cairo , Egypt
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Significance of Mini Bronchoalveolar Lavage Fluid Amylase Level in Ventilator-Associated Pneumonia: A Prospective Observational Study. Crit Care Med 2017; 46:71-78. [PMID: 29053492 DOI: 10.1097/ccm.0000000000002774] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Aspiration of oropharyngeal or gastric contents in intubated patients can lead to ventilator-associated pneumonia. Amylase in respiratory secretion has been reported as a possible marker of aspiration. We studied whether elevated α-amylase in mini bronchoalveolar lavage specimens can be suggestive of ventilator-associated pneumonia in intubated patients with high clinical suspicion. DESIGN Prospective single-center observational study. SETTING Department of Critical Care Medicine, tertiary care academic institute. PATIENTS Adult patients on mechanical ventilation for more than 48 hours with with clinically suspected ventilator-associated pneumonia as per defined criteria, admitted between December 2014 and May 2016. METHODS Mini bronchoalveolar lavage samples were collected within 72 hours of endotracheal intubation. Samples were sent for α-amylase level assay and quantitative culture. Ventilator-associated pneumonia was confirmed from mini bronchoalveolar lavage microbial culture of greater than or equal to 10 cfu/mL, and patients were divided into ventilator-associated pneumonia and no ventilator-associated pneumonia groups. Pre- and postintubation risk factors for aspiration were also noted. RESULTS The prevalence of ventilator-associated pneumonia was 64.9% among 151 patients in whom it was clinically suspected. Median (interquartile range) mini bronchoalveolar lavage α-amylase levels in ventilator-associated pneumonia and no ventilator-associated pneumonia groups on the day of study inclusion were 287 U/L (164-860 U/L) and 94 U/L (59-236 U/L), respectively (p < 0.001). Median (interquartile range) α-amylase levels in patients with 0, 1, 2, and 3 preintubation risk factors were 65 U/L (35-106 U/L), 200 U/L (113-349 U/L), 867 U/L (353-1,425 U/L), and 3,453 U/L (1,865-4,304 U/L), respectively (p < 0.001) and 472 U/L (164-1,452 U/L) and 731 U/L (203-1,403 U/L) in patients with 1 and 2 postintubation risk factors, respectively (p < 0.001). A mini bronchoalveolar lavage α-amylase of 163 U/L or more yielded sensitivity and specificity of 73% and 68.6%, respectively, with area under the receiver operating characteristic curve of 0.746 (95% CI, 0.66-0.83). CONCLUSIONS Patients with ventilator-associated pneumonia within 72 hours from intubation have significantly elevated α-amylase concentrations in mini bronchoalveolar lavage fluid. Mini bronchoalveolar lavage α-amylase concentrations increase with increasing number of aspiration risk factors.
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12
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Abstract
Gastro-oesophageal reflux is associated with a wide range of respiratory disorders, including asthma, isolated chronic cough, idiopathic pulmonary fibrosis, chronic obstructive pulmonary disease and cystic fibrosis. Reflux can be substantial and reach the proximal margins of the oesophagus in some individuals with specific pulmonary diseases, suggesting that this association is more than a coincidence. Proximal oesophageal reflux in particular has led to concern that microaspiration might have an important, possibly even causal, role in respiratory disease. Interestingly, reflux is not always accompanied by typical reflux symptoms, such as heartburn and/or regurgitation, leading many clinicians to empirically treat for possible gastro-oesophageal reflux. Indeed, costs associated with use of acid suppressants in pulmonary disease far outweigh those in typical GERD, despite little evidence of therapeutic benefit in clinical trials. This Review comprehensively examines the possible mechanisms that might link pulmonary disease and oesophageal reflux, highlighting the gaps in current knowledge and limitations of previous research, and helping to shed light on the frequent failure of antireflux treatments in pulmonary disease.
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Bohman JK, Kashyap R, Lee A, He Z, Soundar S, Bolling LL, Kor DJ. A pilot randomized clinical trial assessing the effect of cricoid pressure on risk of aspiration. CLINICAL RESPIRATORY JOURNAL 2016; 12:175-182. [DOI: 10.1111/crj.12508] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/25/2016] [Accepted: 05/13/2016] [Indexed: 12/28/2022]
Affiliation(s)
- J. Kyle Bohman
- Department of Anesthesiology, Division of Critical Care Medicine; Mayo Clinic; Rochester MN USA
| | - Rahul Kashyap
- Department of Anesthesiology, Division of Critical Care Medicine; Mayo Clinic; Rochester MN USA
| | - Augustine Lee
- Department of Medicine, Division of Pulmonary and Critical Care Medicine; Mayo Clinic; Jacksonville FL USA
| | - Zhaoping He
- Gastroenterology Research and Clinical Laboratories, Alfred I. duPont Hospital for Children; Wilmington DE USA
| | - Sam Soundar
- Gastroenterology Research and Clinical Laboratories, Alfred I. duPont Hospital for Children; Wilmington DE USA
| | - Laura L. Bolling
- Gastroenterology Research and Clinical Laboratories, Alfred I. duPont Hospital for Children; Wilmington DE USA
| | - Daryl J. Kor
- Department of Anesthesiology, Division of Critical Care Medicine; Mayo Clinic; Rochester MN USA
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14
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Strugala V, Woodcock AD, Dettmar PW, Faruqi S, Morice AH. Detection of pepsin in sputum: a rapid and objective measure of airways reflux. Eur Respir J 2015; 47:339-41. [DOI: 10.1183/13993003.00827-2015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 09/11/2015] [Indexed: 12/23/2022]
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Hallal C, Chaves VS, Borges GC, Werlang IC, Fontella FU, Matte U, Goldani MZ, Carvalho PR, Trotta EA, Piva JP, Barros SGS, Goldani HAS. Acid and Weakly Acidic Gastroesophageal Reflux and Pepsin Isoforms (A and C) in Tracheal Secretions of Critically Ill Children. Chest 2015; 148:333-339. [PMID: 25654241 DOI: 10.1378/chest.14-1967] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Gastroesophageal reflux (GER) and pulmonary aspiration are frequent in patients in the ICU. The presence of pepsin in airways seems to be the link between them. However, pepsin isoforms A (gastric specific) and C (pneumocyte potentially derived) need to be distinguished. This study aimed to evaluate GER patterns and to determine the presence of pepsin A and C in tracheal secretions of critically ill children receiving mechanical ventilation. METHODS All patients underwent combined multichannel intraluminal impedance-pH (MII-pH) monitoring. Tracheal secretion samples were collected to determine the presence of pepsin. Pepsin A and C were evaluated by Western blot. MII-pH parameters analyzed were number of total GER episodes (NGER); acid, weakly acidic, and weakly alkaline GER episodes; and proximal and distal GER episodes. RESULTS Thirty-four patients (median age, 4 months; range, 1-174 months) were included. MII-pH monitoring detected 2,172 GER episodes (77.0% were weakly acidic; 71.7% were proximal). The median NGER episodes per patient was 59.5 (25th-75th percentile, 20.3-85.3). Weakly acidic GER episodes per patient were significantly more frequent than acid GER episodes per patient (median [25th-75th percentile], 43.5 [20.3-68.3] vs 1.0 [0-13.8], respectively; P < .001). Only three patients had an altered acid reflux index (44.9%, 12.7%, and 13.6%) while not taking antacid drugs. Pepsin A was found in 100% of samples and pepsin C in 76.5%. CONCLUSIONS The majority of GER episodes of children in the ICU were proximal and weakly acidic. All patients had aspiration of gastric contents as detected by pepsin A in tracheal fluid. A specific pepsin assay should be performed to establish gastropulmonary aspiration because pepsin C was found in > 70% of samples.
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Affiliation(s)
- Cristiane Hallal
- Post-Graduate Program Sciences in Gastroenterology and Hepatology, Porto Alegre-RS, Brazil; Pediatric Gastroenterology Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil.
| | - Veridiana S Chaves
- Pediatric Intensive Care Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil
| | - Gilberto C Borges
- Pediatric Gastroenterology Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil
| | - Isabel C Werlang
- Laboratory of Translational Pediatrics, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil
| | - Fernanda U Fontella
- Laboratory of Translational Pediatrics, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil
| | - Ursula Matte
- Post-Graduate Program in Child and Adolescent Health, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil
| | - Marcelo Z Goldani
- Laboratory of Translational Pediatrics, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil; Post-Graduate Program in Child and Adolescent Health, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil
| | - Paulo R Carvalho
- Pediatric Intensive Care Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil; Post-Graduate Program in Child and Adolescent Health, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil
| | - Eliana A Trotta
- Pediatric Intensive Care Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil
| | - Jefferson P Piva
- Pediatric Intensive Care Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil
| | - Sergio G S Barros
- Post-Graduate Program Sciences in Gastroenterology and Hepatology, Porto Alegre-RS, Brazil
| | - Helena A S Goldani
- Post-Graduate Program Sciences in Gastroenterology and Hepatology, Porto Alegre-RS, Brazil; Pediatric Gastroenterology Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil; Laboratory of Translational Pediatrics, Hospital de Clínicas de Porto Alegre, Porto Alegre-RS, Brazil; Post-Graduate Program in Child and Adolescent Health, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil
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Spyridoulias A, Lillie S, Vyas A, Fowler SJ. Detecting laryngopharyngeal reflux in patients with upper airways symptoms: Symptoms, signs or salivary pepsin? Respir Med 2015; 109:963-9. [DOI: 10.1016/j.rmed.2015.05.019] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/16/2015] [Accepted: 05/19/2015] [Indexed: 12/12/2022]
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Affiliation(s)
- J Kyle Bohman
- Department of Anesthesia, Division of Critical Care Medicine, Mayo Clinic College of Medicine, Rochester, MN.
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Lee A, Festic E, Park PK, Raghavendran K, Dabbagh O, Adesanya A, Gajic O, Bartz RR. Characteristics and outcomes of patients hospitalized following pulmonary aspiration. Chest 2014; 146:899-907. [PMID: 24811480 DOI: 10.1378/chest.13-3028] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Pulmonary aspiration is an important recognized cause of ARDS. Better characterization of patients who aspirate may allow identification of potential risks for aspiration that could be used in future studies to mitigate the occurrence of aspiration and its devastating complications. METHODS We conducted a secondary analysis of the Lung Injury Prediction Score cohort to better characterize patients with aspiration, including their potential risk factors and related outcomes. RESULTS Of the 5,584 subjects at risk for ARDS and who required hospitalization, 212 (3.8%) presented with aspiration. Subjects who aspirated were likely to be male (66% vs 56%, P < .007), slightly older (59 years vs 57 years), white (73% vs 61%, P = .0004), admitted from a nursing home (15% vs 5.9%, P < .0001), have a history of alcohol abuse (21% vs 8%, P < .0001), and have lower Glasgow Coma Scale (median, 13 vs 15; P < .0001). Aspiration subjects were sicker (higher APACHE [Acute Physiology and Chronic Health Evaluation] II score), required more mechanical ventilation (54% vs 32%, P < .0001), developed more moderate to severe ARDS (12% vs 3.8%, P < .0001), and were twofold more likely to die in-hospital, even after adjustment for severity of illness (OR = 2.1; 95% CI, 1.2-3.6). Neither obesity nor gastroesophageal reflux was associated with aspiration. CONCLUSIONS Aspiration was more common in men with alcohol abuse history and a lower Glasgow Coma Scale who were admitted from a nursing home. It is independently associated with a significant increase in the risk for ARDS as well as morbidity and mortality. Findings from this study may facilitate the design of future clinical studies of aspiration-induced lung injury.
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Affiliation(s)
- Augustine Lee
- Department of Critical Care Medicine and Division of Pulmonary Medicine, Mayo Clinic Florida, Jacksonville, FL.
| | - Emir Festic
- Department of Critical Care Medicine and Division of Pulmonary Medicine, Mayo Clinic Florida, Jacksonville, FL
| | - Pauline K Park
- Division of Acute Care Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI
| | - Krishnan Raghavendran
- Division of Acute Care Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI
| | - Ousama Dabbagh
- Division of Pulmonary and Critical Care, Department of Internal Medicine, University of Missouri, Columbia, MO
| | - Adebola Adesanya
- Department of Anesthesiology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX
| | - Ognjen Gajic
- Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN
| | - Raquel R Bartz
- Department of Anesthesiology, Duke University Medical Center, Durham, NC
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Dewavrin F, Zerimech F, Boyer A, Maboudou P, Balduyck M, Duhamel A, Nseir S. Accuracy of alpha amylase in diagnosing microaspiration in intubated critically-ill patients. PLoS One 2014; 9:e90851. [PMID: 24603906 PMCID: PMC3946401 DOI: 10.1371/journal.pone.0090851] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 02/04/2014] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES Amylase concentration in respiratory secretions was reported to be a potentially useful marker for aspiration and pneumonia. The aim of this study was to determine accuracy of α-amylase in diagnosing microaspiration in critically ill patients. METHODS Retrospective analysis of prospectively collected data collected in a medical ICU. All patients requiring mechanical ventilation for at least 48 h, and included in a previous randomized controlled trial were eligible for this study, provided that at least one tracheal aspirate was available for α-amylase measurement. As part of the initial trial, pepsin was quantitatively measured in all tracheal aspirates during a 48-h period. All tracheal aspirates were frozen, allowing subsequent measurement of α-amylase for the purpose of the current study. Microaspiration was defined as the presence of at least one positive tracheal aspirate for pepsin (>200 ng.mL-1). Abundant microaspiration was defined as the presence of pepsin at significant level in >74% of tracheal aspirates. RESULTS Amylase was measured in 1055 tracheal aspirates, collected from 109 patients. Using mean α-amylase level per patient, accuracy of α-amylase in diagnosing microaspiration was moderate (area under the receiver operator curve 0.72±0.05 [95%CI 0.61-0.83], for an α-amylase value of 1685 UI.L-1). However, when α-amylase levels, coming from all samples, were taken into account, area under the receiver operator curve was 0.56±0.05 [0.53-0.60]. Mean α-amylase level, and percentage of tracheal aspirates positive for α-amylase were significantly higher in patients with microaspiration, and in patients with abundant microaspiration compared with those with no microaspiration; and similar in patients with microaspiration compared with those with abundant microaspiration. α-amylase and pepsin were significantly correlated (r2 = 0.305, p = 0.001). CONCLUSION Accuracy of mean α-amylase in diagnosing microaspiration is moderate. Further, when all α-amylase levels were taken into account, α-amylase was inaccurate in diagnosing microaspiration, compared with pepsin.
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Affiliation(s)
- Florent Dewavrin
- Intensive Care Unit, Valenciennes Hospital, avenue Desandrouin, Valenciennes, France
| | - Farid Zerimech
- Biochemistry and Molecular Biology Laboratory, Faculty of Pharmacy, Lille II University, Lille, France
| | - Alexandre Boyer
- Medical Intensive Care Unit, CHU Bordeaux, Place Amélie Raba Léon, Bordeaux, France
| | - Patrice Maboudou
- Biochemistry and Molecular Biology Laboratory, Faculty of Pharmacy, Lille II University, Lille, France
| | - Malika Balduyck
- Biochemistry and Molecular Biology Laboratory, Faculty of Pharmacy, Lille II University, Lille, France
| | - Alain Duhamel
- Epidemiology, Public Health and Quality of Care, Nord-de-France University, Lille, France
| | - Saad Nseir
- Critical Care Center, R. Salengro Hospital, University Hospital of Lille, Lille, France
- Medical Assessment Laboratory, EA 2694, University of Lille Nord de France, Lille, France
- * E-mail:
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Alves LR, Soares EG, Aprile LRO, Elias-Júnior J, Vilas Boas PP, Baddini-Martinez J. Chlorophyllin-stained macrophages as markers of pulmonary aspiration. Am J Respir Crit Care Med 2014; 188:1470-2. [PMID: 24328778 DOI: 10.1164/rccm.201307-1225le] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Luis R Alves
- 1 University of São Paulo Ribeirão Preto, Brazil
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Kahrilas PJ, Smith JA, Dicpinigaitis PV. A causal relationship between cough and gastroesophageal reflux disease (GERD) has been established: a pro/con debate. Lung 2013; 192:39-46. [PMID: 24221340 DOI: 10.1007/s00408-013-9528-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 10/21/2013] [Indexed: 01/10/2023]
Abstract
Along with upper airway cough syndrome (formerly, postnasal drip syndrome) and eosinophilic airway inflammation (asthma, nonasthmatic eosinophilic bronchitis), gastroesophageal reflux disease (GERD) is generally considered among the most common etiologies of chronic cough. Indeed, cough management guidelines published by numerous respiratory societies worldwide recommend evaluation and treatment of GERD as an integral component of the diagnostic/therapeutic algorithm for the management of chronic cough. However, a significant number of patients with chronic cough presumed due to GERD do not report improvement despite aggressive acid-suppressive therapy. Some of these refractory cases may be due to the recently appreciated entity of nonacid or weakly acidic reflux. Further contributing to the controversy are recent studies that demonstrate that patients with chronic cough do not have excessive reflux events relative to healthy volunteers. Although a temporal relationship between cough and reflux events has been suggested by studies utilizing impedance-pH monitoring of reflux events and objective cough recording, consensus is lacking in terms of whether this temporal relationship proves a causal link between reflux and cough. The fourth American Cough Conference (New York, June 2013) provided an ideal forum for the debate of this issue between two internationally recognized experts in the field of reflux and chronic cough.
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Affiliation(s)
- Peter J Kahrilas
- Division of Gastroenterology and Hepatology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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