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Arcuri JF, Abarshi E, Preston NJ, Brine J, Pires Di Lorenzo VA. Benefits of interventions for respiratory secretion management in adult palliative care patients-a systematic review. BMC Palliat Care 2016; 15:74. [PMID: 27507303 PMCID: PMC4979117 DOI: 10.1186/s12904-016-0147-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 08/01/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Respiratory secretions impact negatively on palliative patients. Unfortunately, a gold standard therapy is not yet available. The purpose of this study was to identify which interventions are in use to control respiratory secretions in patients with chronic disease with a poor prognosis and verify their effects on outcomes relevant for palliative care patients. METHODS A systematic review of the literature with narrative summary was conducted. We searched eight electronic databases in April (6th), 2016. Citation-tracking and reference list searches were conducted. We included randomized controlled trials, crossover trials, observational and qualitative studies regarding interventions for respiratory secretion management in adult patients with chronic diseases that met inclusion criteria indicating short prognosis. RESULTS Six randomized controlled trials, 11 observational studies, ten crossover trials and one qualitative study were found. Interventions included mechanical insufflation-exsufflation (MIE), expiratory muscle training, manually-assisted cough, tracheotomy, chest physiotherapy, suctioning, air stacking, electrical stimulation of abdominal muscles, nebulized saline, positive expiratory pressure masks, percussive ventilation, high frequency chest wall oscillations. The interventions with most promising benefits to patients in palliative care were manually-assisted cough and mechanical insufflation-exsufflation to promote expectoration and percussive ventilation to improve mucous clearance. CONCLUSION Therapies, such as manually assisted cough, mechanical insufflation-exsufflation and percussive ventilation, which aim to deal with respiratory secretion, were the most promising treatment for use in palliative care for specific diseases. Nevertheless, the evidence still needs to improve in order to identify which treatment is the best.
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Affiliation(s)
- Juliano Ferreira Arcuri
- Federal University of São Carlos, Rod Washington Luiz, km 235, Monjolinho, São Carlos, SP, CEP 13565-905, Brazil.
| | - Ebun Abarshi
- International Observatory on End of Life Care, Faculty of Health and Medicine, Furness College, Lancaster University, Bailrigg, LA1 4YG, UK
| | - Nancy J Preston
- International Observatory on End of Life Care, Faculty of Health and Medicine, Furness College, Lancaster University, Bailrigg, LA1 4YG, UK
| | - Jenny Brine
- Lancaster University Library, Lancaster University, Bailrigg, LA1 4YG, UK
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Albrecht HH. Can Big Data Analyses Help Speed Up the Clinical Development of Mucoactive Drugs for Symptomatic RTIs? Lung 2016; 194:31-4. [PMID: 26797018 DOI: 10.1007/s00408-016-9846-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 01/08/2016] [Indexed: 11/28/2022]
Abstract
This paper highlights the need for validated models to demonstrate mucoactive drug efficacy in relieving respiratory tract infection (RTI) symptoms and suggests new concepts to further ongoing research. The review is based on the analyses of studies published on mucoactive drug in respiratory diseases, data supporting FDA's expectorant monograph, and related US consumer use and attitude surveys. The changes in the volume and consistency of respiratory mucus during RTIs may result in ciliary dysfunction, mucus accumulation, and symptoms like cough and chest congestion. Mucoactive drugs can provide relief, but limited choices exist in the US, due to the unavailability of validated clinical models and unequivocal efficacy results. Ongoing developments have not provided definitive solutions, and Big Data analysis techniques may help overcome current clinical research limitations by identifying differentiating disease and patient factors to speed up the development process to substantiate the effectiveness of expectorant/mucoactive drugs in relieving RTI symptoms.
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Affiliation(s)
- Helmut H Albrecht
- H2A Associates, LLC, 3350 SW 27th Ave, Unit# 2203, Miami, FL, 33133, USA. .,Department of Cellular Biology and Pharmacology, Herbert Wertheim College of Medicine, Florida International University, 11200 SW 8th St., GL495, Miami, FL, 33199, USA.
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Anderson WH, Coakley RD, Button B, Henderson AG, Zeman KL, Alexis NE, Peden DB, Lazarowski ER, Davis CW, Bailey S, Fuller F, Almond M, Qaqish B, Bordonali E, Rubinstein M, Bennett WD, Kesimer M, Boucher RC. The Relationship of Mucus Concentration (Hydration) to Mucus Osmotic Pressure and Transport in Chronic Bronchitis. Am J Respir Crit Care Med 2015; 192:182-90. [PMID: 25909230 PMCID: PMC4532825 DOI: 10.1164/rccm.201412-2230oc] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 04/22/2015] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Chronic bronchitis (CB) is characterized by persistent cough and sputum production. Studies were performed to test whether mucus hyperconcentration and increased partial osmotic pressure, in part caused by abnormal purine nucleotide regulation of ion transport, contribute to the pathogenesis of CB. OBJECTIVES We tested the hypothesis that CB is characterized by mucus hyperconcentration, increased mucus partial osmotic pressures, and reduced mucus clearance. METHODS We measured in subjects with CB as compared with normal and asymptomatic smoking control subjects indices of mucus concentration (hydration; i.e., percentage solids) and sputum adenine nucleotide/nucleoside concentrations. In addition, sputum partial osmotic pressures and mucus transport rates were measured in subjects with CB. MEASUREMENTS AND RESULTS CB secretions were hyperconcentrated as indexed by an increase in percentage solids and total mucins, in part reflecting decreased extracellular nucleotide/nucleoside concentrations. CB mucus generated concentration-dependent increases in partial osmotic pressures into ranges predicted to reduce mucus transport. Mucociliary clearance (MCC) in subjects with CB was negatively correlated with mucus concentration (percentage solids). As a test of relationships between mucus concentration and disease, mucus concentrations and MCC were compared with FEV1, and both were significantly correlated. CONCLUSIONS Abnormal regulation of airway surface hydration may slow MCC in CB and contribute to disease pathogenesis.
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Affiliation(s)
| | | | - Brian Button
- Marsico Lung Institute/Cystic Fibrosis Research Center
| | | | - Kirby L. Zeman
- Marsico Lung Institute/Center for Environmental Medicine, Asthma, and Lung Biology
| | - Neil E. Alexis
- Marsico Lung Institute/Center for Environmental Medicine, Asthma, and Lung Biology
| | - David B. Peden
- Marsico Lung Institute/Center for Environmental Medicine, Asthma, and Lung Biology
| | | | | | - Summer Bailey
- Marsico Lung Institute/Cystic Fibrosis Research Center
| | - Fred Fuller
- Pulmonary and Critical Care Medicine, Department of Medicine
| | - Martha Almond
- Pulmonary and Critical Care Medicine, Department of Medicine
| | | | | | - Michael Rubinstein
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - William D. Bennett
- Pulmonary and Critical Care Medicine, Department of Medicine
- Marsico Lung Institute/Center for Environmental Medicine, Asthma, and Lung Biology
| | | | - Richard C. Boucher
- Pulmonary and Critical Care Medicine, Department of Medicine
- Marsico Lung Institute/Cystic Fibrosis Research Center
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Abstract
The elderly patient (65 years and older) with chronic obstructive pulmonary disease (COPD) can be a challenge to the clinician. This begins with the correct and early diagnosis, the assessment of disease severity, recognizing complicating comorbidities, determining the burden of symptoms, and monitoring the frequency of acute exacerbations. Comprehensive management of COPD in the elderly patient should improve health-related quality of life, lung function, reduce exacerbations, and promote patient compliance with treatment plans. Only smoking cessation and oxygen therapy in COPD patients with hypoxemia reduce mortality. Bronchodilators, corticosteroids, methylxanthines, phosphodiesterase-4 inhibitors, macrolide antibiotics, mucolytics, and pulmonary rehabilitation improve some outcome measures such as spirometry measures and the frequency of COPD exacerbations without improving mortality. International treatment guidelines to reduce symptoms and reduce the risk of acute exacerbations exist. Relief of dyspnea and control of anxiety are important. The approach to each patient is best individualized. Earlier use of palliative care should be considered when traditional pharmacotherapy fails to achieve outcome measures and before consideration of end-of-life issues.
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Hemkens LG, Contopoulos-Ioannidis DG, Ioannidis JP. Concordance of effects of medical interventions on hospital admission and readmission rates with effects on mortality. CMAJ 2013; 185:E827-37. [PMID: 24144601 PMCID: PMC3855143 DOI: 10.1503/cmaj.130430] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Many clinical trials examine a composite outcome of admission to hospital and death, or infer a relationship between hospital admission and survival benefit. This assumes concordance of the outcomes "hospital admission" and "death." However, whether the effects of a treatment on hospital admissions and readmissions correlate to its effect on serious outcomes such as death is unknown. We aimed to assess the correlation and concordance of effects of medical interventions on admission rates and mortality. METHODS We searched the Cochrane Database of Systematic Reviews from its inception to January 2012 (issue 1, 2012) for systematic reviews of treatment comparisons that included meta-analyses for both admission and mortality outcomes. For each meta-analysis, we synthesized treatment effects on admissions and death, from respective randomized trials reporting those outcomes, using random-effects models. We then measured the concordance of directions of effect sizes and the correlation of summary estimates for the 2 outcomes. RESULTS We identified 61 meta-analyses including 398 trials reporting mortality and 182 trials reporting admission rates; 125 trials reported both outcomes. In 27.9% of comparisons, the point estimates of treatment effects for the 2 outcomes were in opposite directions; in 8.2% of trials, the 95% confidence intervals did not overlap. We found no significant correlation between effect sizes for admission and death (Pearson r = 0.07, p = 0.6). Our results were similar when we limited our analysis to trials reporting both outcomes. INTERPRETATION In this metaepidemiological study, admission and mortality outcomes did not correlate, and discordances occurred in about one-third of the treatment comparisons included in our analyses. Both outcomes convey useful information and should be reported separately, but extrapolating the benefits of admission to survival is unreliable and should be avoided.
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Affiliation(s)
- Lars G. Hemkens
- Stanford Prevention Research Center (Hemkens, Ioannidis), Department of Medicine, Stanford University School of Medicine, Stanford, Calif.; Basel Institute for Clinical Epidemiology and Biostatistics (Hemkens), University Hospital Basel, Basel, Switzerland; Department of Pediatrics (Contopoulos-Ioannidis), Division of Infectious Diseases, Stanford University School of Medicine, Stanford, Calif.; Health Policy Research (Contopoulos-Ioannidis), Palo Alto Medical Foundation Research Institute, Palo Alto, Calif.; Department of Health Research and Policy (Ioannidis), Stanford University School of Medicine; Department of Statistics (Ioannidis), Stanford University School of Humanities and Sciences, Stanford, Calif
| | - Despina G. Contopoulos-Ioannidis
- Stanford Prevention Research Center (Hemkens, Ioannidis), Department of Medicine, Stanford University School of Medicine, Stanford, Calif.; Basel Institute for Clinical Epidemiology and Biostatistics (Hemkens), University Hospital Basel, Basel, Switzerland; Department of Pediatrics (Contopoulos-Ioannidis), Division of Infectious Diseases, Stanford University School of Medicine, Stanford, Calif.; Health Policy Research (Contopoulos-Ioannidis), Palo Alto Medical Foundation Research Institute, Palo Alto, Calif.; Department of Health Research and Policy (Ioannidis), Stanford University School of Medicine; Department of Statistics (Ioannidis), Stanford University School of Humanities and Sciences, Stanford, Calif
| | - John P.A. Ioannidis
- Stanford Prevention Research Center (Hemkens, Ioannidis), Department of Medicine, Stanford University School of Medicine, Stanford, Calif.; Basel Institute for Clinical Epidemiology and Biostatistics (Hemkens), University Hospital Basel, Basel, Switzerland; Department of Pediatrics (Contopoulos-Ioannidis), Division of Infectious Diseases, Stanford University School of Medicine, Stanford, Calif.; Health Policy Research (Contopoulos-Ioannidis), Palo Alto Medical Foundation Research Institute, Palo Alto, Calif.; Department of Health Research and Policy (Ioannidis), Stanford University School of Medicine; Department of Statistics (Ioannidis), Stanford University School of Humanities and Sciences, Stanford, Calif
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Tse HN, Raiteri L, Wong KY, Yee KS, Ng LY, Wai KY, Loo CK, Chan MH. High-dose N-acetylcysteine in stable COPD: the 1-year, double-blind, randomized, placebo-controlled HIACE study. Chest 2013; 144:106-118. [PMID: 23348146 DOI: 10.1378/chest.12-2357] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The mucolytic and antioxidant effects of N-acetylcysteine (NAC) may have great value in COPD treatment. However, beneficial effects have not been confirmed in clinical studies, possibly due to insufficient NAC doses and/or inadequate outcome parameters used. The objective of this study was to investigate high-dose NAC plus usual therapy in Chinese patients with stable COPD. METHODS The 1-year HIACE (The Effect of High Dose N-acetylcysteine on Air Trapping and Airway Resistance of Chronic Obstructive Pulmonary Disease-a Double-blinded, Randomized, Placebo-controlled Trial) double-blind trial conducted in Kwong Wah Hospital, Hong Kong, randomized eligible patients aged 50 to 80 years with stable COPD to NAC 600 mg bid or placebo after 4-week run-in. Lung function parameters, symptoms, modified Medical Research Council (mMRC) dyspnea and St. George's Respiratory Questionnaire (SGRQ) scores, 6-min walking distance (6MWD), and exacerbation and admission rates were measured at baseline and every 16 weeks for 1 year. RESULTS Of 133 patients screened, 120 were eligible (93.2% men; mean age, 70.8±0.74 years; %FEV1 53.9±2.0%). Baseline characteristics were similar in the two groups. At 1 year, there was a significant improvement in forced expiratory flow 25% to 75% (P=.037) and forced oscillation technique, a significant reduction in exacerbation frequency (0.96 times/y vs 1.71 times/y, P=.019), and a tendency toward reduction in admission rate (0.5 times/y vs 0.8 times/y, P=.196) with NAC vs placebo. There were no significant between-group differences in mMRC dypsnea score, SGRQ score, and 6MWD. No major adverse effects were reported. CONCLUSION In this study, 1-year treatment with high-dose NAC resulted in significantly improved small airways function and decreased exacerbation frequency in patients with stable COPD. TRIAL REGISTRY ClinicalTrials.gov; No.: NCT01136239; URL: www.clinicaltrials.gov.
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Affiliation(s)
| | - Luca Raiteri
- Medical Department, Innovation & Medical Sciences, Zambon Company SpA, Bresso, Italy
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Kim V, Criner GJ. Chronic bronchitis and chronic obstructive pulmonary disease. Am J Respir Crit Care Med 2013; 187:228-37. [PMID: 23204254 PMCID: PMC4951627 DOI: 10.1164/rccm.201210-1843ci] [Citation(s) in RCA: 275] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Accepted: 11/16/2012] [Indexed: 11/16/2022] Open
Abstract
Chronic bronchitis (CB) is a common but variable phenomenon in chronic obstructive pulmonary disease (COPD). It has numerous clinical consequences, including an accelerated decline in lung function, greater risk of the development of airflow obstruction in smokers, a predisposition to lower respiratory tract infection, higher exacerbation frequency, and worse overall mortality. CB is caused by overproduction and hypersecretion of mucus by goblet cells, which leads to worsening airflow obstruction by luminal obstruction of small airways, epithelial remodeling, and alteration of airway surface tension predisposing to collapse. Despite its clinical sequelae, little is known about the pathophysiology of CB and goblet cell hyperplasia in COPD, and treatment options are limited. In addition, it is becoming increasingly apparent that in the classic COPD spectrum, with emphysema on one end and CB on the other, most patients lie somewhere in the middle. It is known now that many patients with severe emphysema can develop CB, and small airway pathology has been linked to worse clinical outcomes, such as increased mortality and lesser improvement in lung function after lung volume reduction surgery. However, in recent years, a greater understanding of the importance of CB as a phenotype to identify patients with a beneficial response to therapy has been described. Herein we review the epidemiology of CB, the evidence behind its clinical consequences, the current understanding of the pathophysiology of goblet cell hyperplasia in COPD, and current therapies for CB.
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Affiliation(s)
- Victor Kim
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Temple University School of Medicine, Philadelphia, PA 19140, USA.
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Agoritsas T, Merglen A, Courvoisier DS, Combescure C, Garin N, Perrier A, Perneger TV. Sensitivity and predictive value of 15 PubMed search strategies to answer clinical questions rated against full systematic reviews. J Med Internet Res 2012; 14:e85. [PMID: 22693047 PMCID: PMC3414859 DOI: 10.2196/jmir.2021] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2011] [Revised: 03/11/2012] [Accepted: 04/13/2012] [Indexed: 11/16/2022] Open
Abstract
Background Clinicians perform searches in PubMed daily, but retrieving relevant studies is challenging due to the rapid expansion of medical knowledge. Little is known about the performance of search strategies when they are applied to answer specific clinical questions. Objective To compare the performance of 15 PubMed search strategies in retrieving relevant clinical trials on therapeutic interventions. Methods We used Cochrane systematic reviews to identify relevant trials for 30 clinical questions. Search terms were extracted from the abstract using a predefined procedure based on the population, interventions, comparison, outcomes (PICO) framework and combined into queries. We tested 15 search strategies that varied in their query (PIC or PICO), use of PubMed’s Clinical Queries therapeutic filters (broad or narrow), search limits, and PubMed links to related articles. We assessed sensitivity (recall) and positive predictive value (precision) of each strategy on the first 2 PubMed pages (40 articles) and on the complete search output. Results The performance of the search strategies varied widely according to the clinical question. Unfiltered searches and those using the broad filter of Clinical Queries produced large outputs and retrieved few relevant articles within the first 2 pages, resulting in a median sensitivity of only 10%–25%. In contrast, all searches using the narrow filter performed significantly better, with a median sensitivity of about 50% (all P < .001 compared with unfiltered queries) and positive predictive values of 20%–30% (P < .001 compared with unfiltered queries). This benefit was consistent for most clinical questions. Searches based on related articles retrieved about a third of the relevant studies. Conclusions The Clinical Queries narrow filter, along with well-formulated queries based on the PICO framework, provided the greatest aid in retrieving relevant clinical trials within the 2 first PubMed pages. These results can help clinicians apply effective strategies to answer their questions at the point of care.
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Affiliation(s)
- Thomas Agoritsas
- Division of Clinical Epidemiology, University Hospitals of Geneva, Geneva, Switzerland.
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Abstract
Chronic obstructive pulmonary disease (COPD) is characterised by progressive airflow obstruction that is only partly reversible, inflammation in the airways, and systemic effects or comorbities. The main cause is smoking tobacco, but other factors have been identified. Several pathobiological processes interact on a complex background of genetic determinants, lung growth, and environmental stimuli. The disease is further aggravated by exacerbations, particularly in patients with severe disease, up to 78% of which are due to bacterial infections, viral infections, or both. Comorbidities include ischaemic heart disease, diabetes, and lung cancer. Bronchodilators constitute the mainstay of treatment: β(2) agonists and long-acting anticholinergic agents are frequently used (the former often with inhaled corticosteroids). Besides improving symptoms, these treatments are also thought to lead to some degree of disease modification. Future research should be directed towards the development of agents that notably affect the course of disease.
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Affiliation(s)
- Marc Decramer
- Respiratory Division, University Hospital, University of Leuven, Leuven, Belgium.
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Berman AR. Management of Patients with End-Stage Chronic Obstructive Pulmonary Disease. Prim Care 2011; 38:277-97, viii-ix. [DOI: 10.1016/j.pop.2011.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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