Management of Bronchiolitis: A Clinical Update
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1 Prepared for your next patient. TM Management of Bronchiolitis: A Clinical Update Todd A. Florin, MD, MSCE, FAAP Assistant Professor, Department of Pediatrics University of Cincinnati College of Medicine Division of Pediatric Emergency Medicine Cincinnati Children s Hospital Medical Center
2 Disclaimers Statements and opinions expressed are those of the authors and not necessarily those of the American Academy of Pediatrics. Mead Johnson sponsors programs such as this to give healthcare professionals access to scientific and educational information provided by experts. The presenter has complete and independent control over the planning and content of the presentation, and is not receiving any compensation from Mead Johnson for this presentation. The presenter s comments and opinions are not necessarily those of Mead Johnson. In the event that the presentation contains statements about uses of drugs that are not within the drugs' approved indications, Mead Johnson does not promote the use of any drug for indications outside the FDA-approved product label.
3 Objectives Briefly discuss the epidemiology and clinical features of acute bronchiolitis. Review the evidence behind currently recommended diagnostic tests and therapies for acute bronchiolitis. Describe emerging therapies in acute bronchiolitis, including hypertonic saline and high-flow nasal cannula.
4 Introduction and Definitions A disorder most commonly caused in infants by viral lower respiratory tract infection. A constellation of clinical symptoms and signs including an upper respiratory prodrome followed by increased respiratory effort and wheezing in children less than 2 years of age. (AAP Guideline 2006) It is the most common lower respiratory infection in this age group and is characterized by acute inflammation, edema, and necrosis of epithelial cells lining small airways, increased mucus production, and bronchospasm.
5 Pathophysiology Viral Infection in Upper Respiratory Tract Spread to Lower Respiratory Tract Inflamed Bronchiole Epithelium White Blood Cells Infiltrate Bronchiolar Epithelium Submucosal and Adventitial Edema Sloughed, necrotic epithelium and fibrin plugs airways Airway Obstruction Hypoxemia - Air Trapping - Atelectasis - Bronchospasm - Ventilation/Perfusi on Mismatch
6 Challenges to Management Phenotypic heterogeneity o Isolated episode of viral-induced wheezing o Episodic wheezing without atopy o Multiple exacerbations of wheezing associated with asthma Phenotypes respond differently to treatment Etiologic heterogeneity
7 Epidemiology Bronchiolitis RSV Isolates Year Hall CB. Respiratory syncytial virus and parainfluenza virus. N Engl J Med. 2001;344(25)
8 Virology Respiratory syncytial virus o 50-80% Human metapneumovirus o 10-20% Adenovirus Rhinovirus Parainfluenza Influenza Co-Infection Common: 10-30%
9 Clinical Presentation Rare in 1st month, peaks at 2-5 months Upper Respiratory Infection o Rhinitis Lower Respiratory Disease o Tachypnea o Wheezing o Cough o Crackles o Use of accessory muscles o Nasal flaring Fever in approximately 30%
10 Diagnostic Testing Large variation in diagnostic testing obtained by clinicians 1 Evidence-based reviews do not support any diagnostic tests, including chest radiographs and viral testing, for routine bronchiolitis 2,3 Standardization in care has resulted in substantial reduction in diagnostic testing with cost and outcome benefits 4,5 Diagnostic testing should be reserved for specific cases 1 Florin TA, Byczkowski T, Ruddy RM. Variation in the management of infants hospitalized for bronchiolitis persists after the 2006 American Academy of Pediatrics bronchiolitis guidelines. J Pediatr. 2014; In Press 2 Zorc JJ, Hall CB. Bronchiolitis: recent evidence on diagnosis and management. Pediatrics. 2010;125(2): American Academy of Pediatrics Subcommittee on Diagnosis and Management of Bronchiolitis. Diagnosis and management of bronchiolitis. Pediatrics. 2006;118(4): Perlstein PH, Kotagal UR, Bolling C, et al. Evaluation of an evidence-based guideline for bronchiolitis. Pediatrics. 1999;104(6): Todd J, Bertoch D, Dolan S. Use of a large national database for comparative evaluation of the effect of a bronchiolitis/viral pneumonia clinical care guideline on patient outcome resource utilization. Arch Pediatr Adolesc Med. 2002;156(11):
11 Outline Theoretical Mechanism Evidence Recommendation(s)
12 Supportive Care Supplemental Oxygen o Recommended for previously healthy infants with oxygen saturations <90% o Reduce pulse oximetry monitoring as clinical condition improves Hydration o Mild-Moderate: oral hydration o Moderate-Severe: intravenous vs. nasogastric Nasal Suctioning o Superficial suctioning may improve work of breathing and feeding o No evidence to support deep pharyngeal suctioning Chest Physiotherapy o Does not improve disease severity, respiratory parameters, length of stay, or oxygen requirements (Cochrane 2012) American Academy of Pediatrics Subcommittee on Diagnosis and Management of Bronchiolitis. Diagnosis and management of bronchiolitis. Pediatrics. 2006;118(4): Roqué i Figuls M, Giné-Garriga M, Granados Rugeles C, et al. Chest physiotherapy for acute bronchiolitis in paediatric patients between 0 and 24 months old. Cochrane Database Syst Rev. 2012;2:CD004873
13 Bronchodilators: Short-Acting Beta-Agonists Theoretical Mechanism: o Beta-agonist effects reverse bronchoconstriction Evidence: o o o No difference: Hospital admission Length of stay Oxygen saturation Length of illness Favoring SABA: Clinical score after treatment ~25% with transient improvement Potential adverse effects Recommendation: o o Not for routine use Anecdotal experience suggests benefit in a subset of children trial may be appropriate but should not be continued unless objective evidence of improvement recent evidence recommends against a trial Gadomski A, Scribani MB. Bronchodilators for bronchiolitis. Cochrane Database Syst Rev. 2014;6:CD American Academy of Pediatrics Subcommittee on Diagnosis and Management of Bronchiolitis. Diagnosis and management of bronchiolitis. Pediatrics. 2006;118(4):
14 Bronchodilators: Racemic Epinephrine Theoretical Mechanism: o Beta-agonist properties reverse bronchoconstriction, while alpha-agonist properties cause vasoconstriction and reduce edema Evidence: o Superior to placebo for short-term outcomes Hospitalization within 24 hours Outpatient clinical score o No difference: Inpatient clinical course Vital signs Length of stay Readmissions Recommendation: o No evidence for repeated dosing or prolonged use in inpatients Hartling L, Bialy LM, Vandermeer B, et al. Epinephrine for bronchiolitis. Cochrane Database Syst Rev. 2011;6:CD American Academy of Pediatrics Subcommittee on Diagnosis and Management of Bronchiolitis. Diagnosis and management of bronchiolitis. Pediatrics. 2006;118(4):
15 Bronchodilators: Albuterol vs. Racemic Epinephrine No difference in: o Hospital admission o Clinical score o Oxygen saturation o Vital signs o Return visits Hartling L, Bialy LM, Vandermeer B, et al. Epinephrine for bronchiolitis. Cochrane Database Syst Rev. 2011;6:CD003123
16 Corticosteroids Theoretical Mechanism: o Anti-inflammatory effect Evidence: o No difference compared to placebo: Admissions at day 1 and 7 Length of stay Clinical score Recommendation: o Not recommended for routine use Fernandes R, Bialy LM, Vandermeer B, et al. Glucocorticoids for acute viral bronchiolitis in infants and young children. Cochrane Database Syst Rev. 2013;6:CD American Academy of Pediatrics Subcommittee on Diagnosis and Management of Bronchiolitis. Diagnosis and management of bronchiolitis. Pediatrics. 2006;118(4):
17 Racemic Epinephrine PLUS Dexamethasone Theoretical Mechanism: o Possible synergistic effect between adrenergic agents and corticosteroids Evidence: o Single, multicenter RCT of 800 infants o 4 groups: Epi alone, Dex alone, Epi+Dex, Placebo Epinephrine: 3 ml of 1:1000 x 2 Dexamethasone: 1 mg/kg (max 10 mg), then 0.6 mg/kg daily x 5d o Infants in the epinephrine-dexamethasone group were significantly less likely than those in the placebo group to be admitted by day 7 (RR 0.65, 95%CI , p=0.02). o After adjustment, this result was rendered insignificant (p=0.07). Recommendation: o Insufficient evidence to recommend epinephrine and dexamethasone in combination Plint A, Johnson DW, Patel H, et al. Epinephrine and dexamethasone in children with bronchiolitis. N Engl J Med. 2009;360(20):
18 Leukotriene Receptor Antagonists Theoretical Mechanism: o High levels of pro-inflammatory leukotrienes in airways of infants with bronchiolitis Evidence: o No benefit compared with placebo in randomized trials in acute symptoms Does not shorten duration of illness o May reduce frequency of post-bronchiolitis wheezing o Small, heterogeneous trials Recommendation: o Not currently recommended Amirav I, Luder AS, Kruger N, et al. A double-blind, placebo-controlled randomized trial of montelukast for acute bronchiolitis. Pediatrics. 2008;122(6):e1249 e1255 Bisgaard H, Flores-Nunez A, Goh A, et al. Study of montelukast for the treatment of respiratory symptoms of post-respiratory syncytial virus bronchiolitis in children. Am J Respir Crit Care Med. 2008;178(8):
19 Hypertonic Saline Theoretical Mechanism: o Enhances mucociliary clearance by decreasing mucus viscosity Evidence: o May decrease hospital length of stay (with longer lengths of stay) o 7 studies show no short-term improvement in respiratory distress in emergency department; 1 shows decreased admission with 3% saline o Likely safe without bronchodilators (retrospective) Recommendation: o May be useful in inpatient setting, likely not useful in emergency department Zhang L, Mendoza-Sassi RA, Wainwright C, et al. Nebulised hypertonic saline for acute bronchiolitis in infants. Cochrane Database Syst Rev. 2013;7:CD Florin TA, Shaw KN, Kittick M, et al. Nebulized hypertonic saline for bronchiolitis in the emergency department: a randomized clinical trial. JAMA Pediatr. 2014;168(7): Ralston S, Hill V, Martinez M. Nebulized hypertonic saline without adjunctive bronchodilators for children with bronchiolitis. Pediatrics. 2010; 126(3):e520 e525
20 Antibiotics Theoretical Mechanism: o Concerns for bacterial infection: fever, young age, secondary infections Evidence: o Low rates of serious bacterial infection (1-12%) Urinary tract infection most common o Chest radiograph findings may be misinterpreted o Acute otitis media is frequent (~50%) o RCTs: No benefit of antibiotics in bronchiolitis Recommendation: o Use antibiotics only in those with specific indications for bacterial infection (e.g., UTI, AOM) American Academy of Pediatrics Subcommittee on Diagnosis and Management of Bronchiolitis. Diagnosis and management of bronchiolitis. Pediatrics. 2006;118(4):
21 High-Flow Nasal Cannula Theoretical Mechanism: o o o o Washout nasopharyngeal dead space Overcome nasopharyngeal resistance with flow Positive distending pressure Improved conductance and compliance Evidence: o Retrospective reviews in PICU 1,2 Decrease need for intubation Decrease respiratory rate Decrease PICU length of stay o Prospective cohort in PICU 3 13 infants Increased end-expiratory lung volumes o Improved RR, FiO 2, and SaO 2 Only one low-quality RCT five trials ongoing Recommendation: o May be useful in severe illness, but insufficient evidence to make a recommendation for routine use 1 McKiernan C, Chua LC, Visintainer PF, et al. High flow nasal cannulae therapy in infants with bronchiolitis. J Pediatr. 2010;156(4): Schibler A, Pham TM, Dunster KR, et al. Reduced intubation rates for infants after introduction of high-flow nasal prong oxygen delivery. Intensive Care Med. 2011;37(5): Hough JL, Pham TM, Schibler A. Physiologic effect of high-flow nasal cannula in infants with bronchiolitis. Ped Crit Care Med. 2014;15(5)e214 e219
22 Continuous Positive Airway Pressure (CPAP) Theoretical Mechanism: o Positive end-expiratory pressure dilates flow-limited airways airway and alveolar recruitment reduces mean airway resistance decreased work of breathing Evidence: o Small, low-quality studies with mixed results o Some reduction in pco 2, respiratory rate, modified Wood asthma score Recommendation: o Insufficient evidence to recommend CPAP o May be useful in severe patients to avoid intubation Donlan M, Fontela PS, Puligandla PS. Use of continuous positive airway pressure (CPAP) in acute viral bronchiolitis: a systemic review. Pediatr Pulmonol. 2011;46(8): Thia LP, McKenzie SA, Blyth TP, et al. Randomised controlled trial of nasal continuous positive airways pressure (CPAP) in children. Arch Dis Child. 2008;93(1):45 47
23 Helium-Oxygen (Heliox) Theoretical Mechanism: o Helium has lower density than air improve gas flow through highresistance airways o Effects rapid (minutes) o Labor intensive Evidence: o Lower respiratory score immediately after initiation o No reduction in rate of intubation, need for mechanical ventilation, PICU length of stay o Small studies, heterogeneous methods Recommendation: o Insufficient evidence for a recommendation need for larger trials with homogenous administration Liet JM, Ducruet T, Gupta V, et al. Heliox inhalation therapy for bronchiolitis in infants. Cochrane Database Syst Rev. 2010;4:CD006915
24 Surfactant Theoretical Mechanism: o Abnormalities of surfactant quality and/or quantity seen in severe cases of bronchiolitis Evidence: o 3 small randomized trials (n=79) No difference in duration of mechanical ventilation Duration of ICU stay less in surfactant group Favorable effects on oxygenation and CO 2 elimination No adverse events or complications Recommendation: o Insufficient evidence for a recommendation need for larger trials Jat KR, Chawla D. Surfactant therapy for bronchiolitis in critically ill infants. Cochrane Database Syst Rev. 2012;9:CD009194
25 Ribavirin Theoretical Mechanism: o Broad-spectrum antiviral inhibits RNA and DNA virus replication Evidence: o PRO: May reduce duration of mechanical ventilation and days of hospitalization; possible decrease in subsequent wheezing episodes o CON: Small samples sizes, heterogeneous trials, controversial efficacy, expensive, cumbersome, possible teratogenic and other health effects on caregivers Recommendation: o Not routinely recommended; may consider for severe disease or those at high risk for severe disease Ventre K, Randolph AG. Ribavirin for respiratory syncytial virus infection of the lower respiratory tract in infants and young children. Cochrane Database Syst Rev. 2007;1:CD American Academy of Pediatrics Subcommittee on Diagnosis and Management of Bronchiolitis. Diagnosis and management of bronchiolitis. Pediatrics. 2006;118(4):
26 Home Oxygen Therapy Theoretical Mechanism: o Mild hypoxia a major reason for hospitalization o Treatment at home for those with hypoxia without other indications for admission may decrease need for hospitalization Evidence: o 1 retrospective cohort study and 1 RCT (Denver [high altitude]) o Well tolerated and supported by parents and pediatricians o Median oxygen use = 6 days o <10% ultimately required admission Recommendation: o Insufficient evidence to recommend o Need more evidence for benefit at sea level Bajaj L, Turner CG, Bothner J. A randomized trial of home oxygen therapy from the emergency department for acute bronchiolitis. Pediatrics. 2006;117(3): Flett KB, Breslin K, Bruan PA, et al. Outpatient course and complications associated with home oxygen therapy for mild bronchiolitis. Pediatrics. 2014;133(5):
27 Palivizumab Theoretical Mechanism: o Humanized mouse monoclonal antibody Evidence: o Reduction in RSV-associated hospitalization in high-risk groups: Chronic lung disease Congenital heart disease Premature (<35 weeks gestation) o No decrease in mortality, rate of recurrent wheeze o Costly optimal cost benefit with use during peak RSV months Recommendation: o Administer to high-risk infants in appropriate manner during RSV season o Not cost-effective or beneficial for routine use in all infants American Academy of Pediatrics Subcommittee on Diagnosis and Management of Bronchiolitis. Diagnosis and management of bronchiolitis. Pediatrics. 2006;118(4): American Academy of Pediatrics. In Pickering LK, Baker CJ, Kimberlin DW, Long SS, eds. Red Book: 2012 Report of the Committee on Infectious Diseases. Elk Grove Village, IL: American Academy of Pediatrics; 2012
28 Bottom Line: Supportive Measures Recommendation Comments Supplemental Oxygen If SaO 2 <90% in room air Space pulse oximetry monitoring as clinical condition improves Suctioning Nasal suctioning Avoid deep suctioning Chest Physiotherapy Not recommended Hydration Oral preferred IV vs. NG if not successful with oral hydration
29 Bottom Line: Adjunct Therapies Recommendation Comments Albuterol No routine use 2006 guideline: Objective measurement if trialed New evidence: No trial Racemic Epinephrine No routine use 2006 guideline: Objective measurement if trialed New evidence: No trial Corticosteroids No routine use Possible synergy of racemic epinephrine and dexamethasone Leukotriene Receptor Antagonists Hypertonic Saline Not recommended May be useful inpatient; not useful in ED Antibiotics Only with specific indication for bacterial infection High-Flow Nasal Cannula Insufficient evidence Consider in severe patients CPAP Insufficient evidence Consider in severe patients Heliox Insufficient evidence Consider in severe patients Ribavirin Not routinely recommended Consider in severe patients Palivizumab CLD, CHD, prematurity Follow administration recs
30 THANK YOU!
31 Value in Inpatient Pediatrics (VIP) Network ( The VIP Network is a healthcare stewardship organization which improves the value of care delivered to any pediatric patient in a hospital bed by helping providers implement clinical practice guidelines and other best practices, with a special focus on eliminating harm and waste caused by overutilization. Visit A Quality Collaborative for Improving Hospitalist Compliance with the AAP Bronchiolitis Guideline (B-QIP) ( to view recent improvement strategies for bronchiolitis care
32 AAP SECTION ON Hospital Medicine Hospitalists are fast becoming the go to leaders for inpatient education It s a great time to be a pediatric hospitalist! Ricardo Quinonez, MD, FAAP Section Chairperson Celebrating 15 years of Accomplishments: Founded the first journal dedicated to Pediatric Hospital Medicine (PHM), Hospital Pediatrics. Edited and published the popular point-of-care manual, Caring for the Hospitalized Child: A Handbook of Inpatient Pediatrics. Drafted the policy statement Guiding Principles for Pediatric Hospital Medicine Programs, outlining basic principles for starting and maintaining PHM programs. Assisted in developing the innovative Advancing Pediatric Educator Excellence Teaching Program. Established working groups to tackle topics such as certification, neonatal hospital medicine, surgical patient care, and quality. Created the PHM Abstract Research Award as well as funded numerous grant opportunities and a visiting professorship series. Supported the early efforts of community hospitalists and PHM fellowship directors. Expanded educational offerings for residents interested in PHM and founded the first annual Fellows Conference in Park
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