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Wild KT, Hedrick HL, Ades AM, Fraga MV, Avitabile CM, Gebb JS, Oliver ER, Coletti K, Kesler EM, Van Hoose KT, Panitch HB, Johng S, Ebbert RP, Herkert LM, Hoffman C, Ruble D, Flohr S, Reynolds T, Duran M, Foster A, Isserman RS, Partridge EA, Rintoul NE. Update on Management and Outcomes of Congenital Diaphragmatic Hernia. J Intensive Care Med 2023:8850666231212874. [PMID: 37933125 DOI: 10.1177/08850666231212874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Infants with congenital diaphragmatic hernia (CDH) benefit from comprehensive multidisciplinary teams that have experience in caring for the unique and complex issues associated with CDH. Despite prenatal referral to specialized high-volume centers, advanced ventilation strategies and pulmonary hypertension management, and extracorporeal membrane oxygenation, mortality and morbidity remain high. These infants have unique and complex issues that begin in fetal and infant life, but persist through adulthood. Here we will review the literature and share our clinical care pathway for neonatal care and follow up. While many advances have occurred in the past few decades, our work is just beginning to continue to improve the mortality, but also importantly the morbidity of CDH.
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Affiliation(s)
- K Taylor Wild
- Division of Neonatology, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Holly L Hedrick
- Richard D. Wood Center for Fetal Diagnosis and Treatment, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Division of Pediatric General, Thoracic, and Fetal Surgery, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Anne M Ades
- Division of Neonatology, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Maria V Fraga
- Division of Neonatology, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Catherine M Avitabile
- Division of Cardiology, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Juliana S Gebb
- Richard D. Wood Center for Fetal Diagnosis and Treatment, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Edward R Oliver
- Department of Radiology, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Kristen Coletti
- Division of Neonatology, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Erin M Kesler
- Division of Pediatric General, Thoracic, and Fetal Surgery, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - K Taylor Van Hoose
- Division of Pediatric General, Thoracic, and Fetal Surgery, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Howard B Panitch
- Division of Pulmonary and Sleep Medicine, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Sandy Johng
- Division of Neonatology, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Renee P Ebbert
- Division of Pediatric General, Thoracic, and Fetal Surgery, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Lisa M Herkert
- Division of Pediatric General, Thoracic, and Fetal Surgery, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Casey Hoffman
- Department of Child and Adolescent Psychiatry and Behavioral Sciences, The Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Deanna Ruble
- Richard D. Wood Center for Fetal Diagnosis and Treatment, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Sabrina Flohr
- Richard D. Wood Center for Fetal Diagnosis and Treatment, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Tom Reynolds
- Richard D. Wood Center for Fetal Diagnosis and Treatment, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Melissa Duran
- Division of Pediatric General, Thoracic, and Fetal Surgery, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Audrey Foster
- Department of Clinical Nutrition, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Rebecca S Isserman
- Division of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Emily A Partridge
- Richard D. Wood Center for Fetal Diagnosis and Treatment, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Division of Pediatric General, Thoracic, and Fetal Surgery, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
| | - Natalie E Rintoul
- Division of Neonatology, Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA, USA
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Wild KT, Mathew L, Hedrick HL, Rintoul NE, Ades A, Soorikian L, Matthews K, Posencheg MA, Kesler E, Van Hoose KT, Panitch HB, Flibotte J, Foglia EE. Respiratory function after birth in infants with congenital diaphragmatic hernia. Arch Dis Child Fetal Neonatal Ed 2023; 108:535-539. [PMID: 36400455 DOI: 10.1136/archdischild-2022-324415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 10/31/2022] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To characterise the transitional pulmonary physiology of infants with congenital diaphragmatic hernia (CDH) using measures of expiratory tidal volume (TV) and end-tidal carbon dioxide (ETCO2). DESIGN Prospective single-centre observational study. SETTING Quaternary neonatal intensive care unit. PATIENTS Infants with an antenatal diagnosis of CDH born at the Children's Hospital of Philadelphia. INTERVENTIONS TV and ETCO2 were simultaneously recorded using a respiratory function monitor (RFM) during invasive positive pressure ventilation immediately after birth. MAIN OUTCOME MEASURES TV per birth weight and ETCO2 values were summarised for each minute after birth. Subgroups of interest were defined by liver position (thoracic vs abdominal) and extracorporeal membrane oxygenation (ECMO) treatment. RESULTS RFM data were available for 50 infants from intubation until a median (IQR) of 9 (7-14) min after birth. TV and ETCO2 values increased for the first 10 min after birth, but intersubject values were heterogeneous. TVs were overall lower and ETCO2 values higher in infants with an intrathoracic liver and infants who were ultimately treated with ECMO. On hospital discharge, survival was 88% (n=43) and 34% (n=17) of infants were treated with ECMO. CONCLUSION Respiratory function immediately after birth is heterogeneous for infants with CDH. Lung aeration, as evidenced by expired TV and ETCO2, appears to be ongoing throughout the first 10 min after birth during invasive positive pressure ventilation. Close attention to expired TV and ETCO2 levels by 10 min after birth may provide an opportunity to optimise and individualise ventilatory support for this high-risk population.
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Affiliation(s)
- K Taylor Wild
- Department of Pediatrics, The Children's Hospital of Philadelphia Division of Neonatology, Philadelphia, Pennsylvania, USA
| | - Leny Mathew
- Center for Fetal Diagnosis and Treatment, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Holly L Hedrick
- Department of Pediatric General, Thoracic, and Fetal Surgery, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Natalie E Rintoul
- Department of Pediatrics, The Children's Hospital of Philadelphia Division of Neonatology, Philadelphia, Pennsylvania, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Anne Ades
- Department of Pediatrics, The Children's Hospital of Philadelphia Division of Neonatology, Philadelphia, Pennsylvania, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Leane Soorikian
- Department of Pediatrics, The Children's Hospital of Philadelphia Division of Neonatology, Philadelphia, Pennsylvania, USA
| | - Kelle Matthews
- Department of Pediatrics, The Children's Hospital of Philadelphia Division of Neonatology, Philadelphia, Pennsylvania, USA
| | - Michael A Posencheg
- Department of Pediatrics, The Children's Hospital of Philadelphia Division of Neonatology, Philadelphia, Pennsylvania, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Erin Kesler
- Department of Pediatric General, Thoracic, and Fetal Surgery, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - K Taylor Van Hoose
- Department of Pediatric General, Thoracic, and Fetal Surgery, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Howard B Panitch
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Division of Pulmonary and Sleep Medicine, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - John Flibotte
- Department of Pediatrics, The Children's Hospital of Philadelphia Division of Neonatology, Philadelphia, Pennsylvania, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Elizabeth E Foglia
- Department of Pediatrics, The Children's Hospital of Philadelphia Division of Neonatology, Philadelphia, Pennsylvania, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Bamat NA, Orians CM, Abbasi S, Morley CJ, Ross Russell R, Panitch HB, Handley SC, Foglia EE, Posencheg MA, Kirpalani H. Use of ventilation/perfusion mismatch to guide individualised CPAP level selection in preterm infants: a feasibility trial. Arch Dis Child Fetal Neonatal Ed 2023; 108:188-193. [PMID: 36104165 DOI: 10.1136/archdischild-2022-324474] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 08/31/2022] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To measure within-subject changes in ventilation/perfusion (V'/Q') mismatch in response to a protocol of individualised nasal continuous positive airway pressure (CPAP) level selection. DESIGN Single-arm, non-randomised, feasibility trial. SETTING Three centres in the Children's Hospital of Philadelphia neonatal care network. PATIENTS Twelve preterm infants of postmenstrual age 27-35 weeks, postnatal age >24 hours, and receiving a fraction of inspired oxygen (FiO2) >0.25 on CPAP of 4-7 cm H2O. INTERVENTIONS We applied a protocol of stepwise CPAP level changes, with the overall direction and magnitude guided by individual responses in V'/Q' mismatch, as determined by the degree of right shift (kilopascals, kPa) in a non-invasive gas exchange model. Best CPAP level was defined as the final pressure level at which V'/Q' improved by more than 5%. MAIN OUTCOME MEASURES Within-subject change in V'/Q' mismatch between baseline and best CPAP levels. RESULTS There was a median (IQR) within-subject reduction in V'/Q' mismatch of 1.2 (0-3.2) kPa between baseline and best CPAP levels, p=0.02. Best CPAP was observed at a median (range) absolute level of 7 (5-8) cm H2O. CONCLUSIONS Non-invasive measures of V'/Q' mismatch may be a useful approach for identifying individualised CPAP levels in preterm infants. The results of our feasibility study should be interpreted cautiously and replication in larger studies evaluating the impact of this approach on clinical outcomes is needed. TRIAL REGISTRATION NUMBER NCT02983825.
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Affiliation(s)
- Nicolas A Bamat
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA .,Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Carolyn M Orians
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Soraya Abbasi
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | | | - Rob Ross Russell
- Paediatrics, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Howard B Panitch
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA.,Division of Pulmonary and Sleep Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Sara C Handley
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Elizabeth E Foglia
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Michael A Posencheg
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Haresh Kirpalani
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
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Nickel AJ, Panitch HB, McDonough JM, Chotzoglou E, Allen JL. Pediatric Simulation of Intrinsic PEEP and Patient-Ventilator Trigger Asynchrony During Mechanical Ventilation. Respir Care 2022; 67:1405-1412. [PMID: 36127127 PMCID: PMC9993968 DOI: 10.4187/respcare.09484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Intrinsic PEEP during mechanical ventilation occurs when there is insufficient time for expiration to functional residual capacity before the next inspiration, resulting in air trapping. Increased expiratory resistance (RE), too rapid of a patient or ventilator breathing rate, or a longer inspiratory to expiratory time ratio (TI/TE) can all be causes of intrinsic PEEP. Intrinsic PEEP can result in increased work of breathing and patient-ventilator asynchrony (PVA) during patient-triggered breaths. We hypothesized that the difference between intrinsic PEEP and ventilator PEEP acts as an inspiratory load resulting in trigger asynchrony that needs to be overcome by increased respiratory muscle pressure (Pmus). METHODS Using a Servo lung model (ASL 5000) and LTV 1200 ventilator in pressure control mode, we developed a passive model demonstrating how elevated RE increases intrinsic PEEP above ventilator PEEP. We also developed an active model investigating the effects of RE and intrinsic PEEP on trigger asynchrony (expressed as percentage of patient-initiated breaths that failed to trigger). We then studied if trigger asynchrony could be reduced by increased Pmus. RESULTS Intrinsic PEEP increased significantly with increasing RE (r = 0.97, P = .006). Multivariate logistic regression analysis showed that both RE and negative Pmus levels affect trigger asynchrony (P < .001). CONCLUSIONS A passive lung model describes the development of increasing intrinsic PEEP with increasing RE at a given ventilator breathing rate. An active lung model shows how this can lead to trigger asynchrony since the Pmus needed to trigger a breath is greater with increased RE, as the inspiratory muscles must overcome intrinsic PEEP. This model will lend itself to the study of intrinsic PEEP engendered by a higher ventilator breathing rate, as well as higher TI/TE, and will be useful in ventilator simulation scenarios of PVA. The model also suggests that increasing ventilator PEEP to match intrinsic PEEP can improve trigger asynchrony through a reduction in RE.
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Affiliation(s)
- Amanda J Nickel
- Department of Respiratory Care, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
| | - Howard B Panitch
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; and University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | - Joseph M McDonough
- Department of Respiratory Care, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Etze Chotzoglou
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; and Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Julian L Allen
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; and University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
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Lewis TR, Kielt MJ, Walker VP, Levin JC, Guaman MC, Panitch HB, Nelin LD, Abman SH. Association of Racial Disparities With In-Hospital Outcomes in Severe Bronchopulmonary Dysplasia. JAMA Pediatr 2022; 176:852-859. [PMID: 35913704 PMCID: PMC9344383 DOI: 10.1001/jamapediatrics.2022.2663] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
IMPORTANCE Bronchopulmonary dysplasia (BPD) is the most common serious morbidity of preterm birth. Short-term respiratory outcomes for infants with the most severe forms of BPD are highly variable. The mechanisms that explain this variability remain unknown and may be mediated by racial disparities. OBJECTIVE To determine the association of maternal race with death and length of hospital stay in a multicenter cohort of infants with severe BPD. DESIGN, SETTING, AND PARTICIPANTS This multicenter cohort study included preterm infants enrolled in the BPD Collaborative registry from January 1, 2015, to July 19, 2021, involving 8 BPD Collaborative centers located in the US. Included patients were born at less than 32 weeks' gestation, had a diagnosis of severe BPD as defined by the 2001 National Institutes of Health Consensus Criteria, and were born to Black or White mothers. EXPOSURES Maternal race: Black vs White. MAIN OUTCOMES AND MEASURES Death and length of hospital stay. RESULTS Among 834 registry infants (median [IQR] gestational age, 25 [24-27] weeks; 492 male infants [59%]) meeting inclusion criteria, the majority were born to White mothers (558 [67%]). Death was observed infrequently in the study cohort (32 [4%]), but Black maternal race was associated with an increased odds of death (adjusted odds ratio, 2.1; 95% CI, 1.2-3.5) after adjusting for center. Black maternal race was also significantly associated with length of hospital stay (adjusted between-group difference, 10 days; 95% CI, 3-17 days). CONCLUSIONS AND RELEVANCE In a multicenter severe BPD cohort, study results suggest that infants born to Black mothers had increased likelihood of death and increased length of hospital stay compared with infants born to White mothers. Prospective studies are needed to define the sociodemographic mechanisms underlying disparate health outcomes for Black infants with severe BPD.
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Affiliation(s)
- Tamorah R. Lewis
- Children’s Mercy Hospital, The University of Missouri—Kansas City, Kansas City
| | - Matthew J. Kielt
- Nationwide Children’s Hospital, The Ohio State University College of Medicine, Columbus
| | - Valencia P. Walker
- Nationwide Children’s Hospital, The Ohio State University College of Medicine, Columbus
| | - Jonathan C. Levin
- Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts
| | | | - Howard B. Panitch
- Children’s Hospital of Philadelphia, Perelman School of Medicine at The University of Pennsylvania, Philadelphia
| | - Leif D. Nelin
- Nationwide Children’s Hospital, The Ohio State University College of Medicine, Columbus
| | - Steven H. Abman
- Children's Hospital Colorado, The University of Colorado School of Medicine, Aurora
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Cristea AI, Ren CL, Amin R, Eldredge LC, Levin JC, Majmudar PP, May AE, Rose RS, Tracy MC, Watters KF, Allen J, Austin ED, Cataletto ME, Collaco JM, Fleck RJ, Gelfand A, Hayes D, Jones MH, Kun SS, Mandell EW, McGrath-Morrow SA, Panitch HB, Popatia R, Rhein LM, Teper A, Woods JC, Iyer N, Baker CD. Outpatient Respiratory Management of Infants, Children, and Adolescents with Post-Prematurity Respiratory Disease: An Official American Thoracic Society Clinical Practice Guideline. Am J Respir Crit Care Med 2021; 204:e115-e133. [PMID: 34908518 PMCID: PMC8865713 DOI: 10.1164/rccm.202110-2269st] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Premature birth affects millions of neonates each year, placing them at risk for respiratory disease due to prematurity. Bronchopulmonary dysplasia is the most common chronic lung disease of infancy, but recent data suggest that even premature infants who do not meet the strict definition of bronchopulmonary dysplasia can develop adverse pulmonary outcomes later in life. This post-prematurity respiratory disease (PPRD) manifests as chronic respiratory symptoms, including cough, recurrent wheezing, exercise limitation, and reduced pulmonary function. This document provides an evidence-based clinical practice guideline on the outpatient management of infants, children, and adolescents with PPRD. Methods: A multidisciplinary panel of experts posed questions regarding the outpatient management of PPRD. We conducted a systematic review of the relevant literature. The Grading of Recommendations, Assessment, Development, and Evaluation approach was used to rate the quality of evidence and the strength of the clinical recommendations. Results: The panel members considered the strength of each recommendation and evaluated the benefits and risks of applying the intervention. In formulating the recommendations, the panel considered patient and caregiver values, the cost of care, and feasibility. Recommendations were developed for or against three common medical therapies and four diagnostic evaluations in the context of the outpatient management of PPRD. Conclusions: The panel developed recommendations for the outpatient management of patients with PPRD on the basis of limited evidence and expert opinion. Important areas for future research were identified.
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Sindelar R, Shepherd EG, Ågren J, Panitch HB, Abman SH, Nelin LD. Established severe BPD: is there a way out? Change of ventilatory paradigms. Pediatr Res 2021; 90:1139-1146. [PMID: 34012026 DOI: 10.1038/s41390-021-01558-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 02/04/2023]
Abstract
Improved survival of extremely preterm newborn infants has increased the number of infants at risk for developing bronchopulmonary dysplasia (BPD). Despite efforts to prevent BPD, many of these infants still develop severe BPD (sBPD) and require long-term invasive mechanical ventilation. The focus of research and clinical management has been on the prevention of BPD, which has had only modest success. On the other hand, research on the management of the established sBPD patient has received minimal attention even though this condition poses large economic and health problems with extensive morbidities and late mortality. Patients with sBPD, however, have been shown to respond to treatments focused not only on ventilatory strategies but also on multidisciplinary approaches where neurodevelopmental support, growth promoting strategies, and aggressive treatment of pulmonary hypertension improve their long-term outcomes. In this review we will try to present a physiology-based ventilatory strategy for established sBPD, emphasizing a possible paradigm shift from acute efforts to wean infants at all costs to a more chronic approach of stabilizing the infant. This chronic approach, herein referred to as chronic phase ventilation, aims at allowing active patient engagement, reducing air trapping, and improving ventilation-perfusion matching, while providing sufficient support to optimize late outcomes. IMPACT: Based on pathophysiological aspects of evolving and established severe BPD in premature infants, this review presents some lung mechanical properties of the most severe phenotype and proposes a chronic phase ventilatory strategy that aims at reducing air trapping, improving ventilation-perfusion matching and optimizing late outcomes.
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Affiliation(s)
- Richard Sindelar
- University Children's Hospital, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden.
| | - Edward G Shepherd
- Nationwide Children's Hospital, Ohio State University, Columbus, OH, USA
| | - Johan Ågren
- University Children's Hospital, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - Howard B Panitch
- Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, USA
| | - Steven H Abman
- Children's Hospital Colorado, University of Colorado, Aurora, CO, USA
| | - Leif D Nelin
- University Children's Hospital, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden.,Nationwide Children's Hospital, Ohio State University, Columbus, OH, USA
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8
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Edwards JD, Panitch HB, George M, Cirrilla AM, Grunstein E, Wolfe J, Nelson JE, Miller RL. Development and validation of a novel informational booklet for pediatric long-term ventilation decision support. Pediatr Pulmonol 2021; 56:1198-1204. [PMID: 33305899 PMCID: PMC8035285 DOI: 10.1002/ppul.25221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 11/30/2020] [Accepted: 12/05/2020] [Indexed: 11/10/2022]
Abstract
OBJECTIVES To provide accessible, uniform, comprehensive, and balanced information to families deciding whether to initiate long-term ventilation (LTV) for their child, we sought to develop and validate a novel informational resource. METHODS The Ottawa Decision Support Framework was followed. Previous interviews with 44 lay and 15 professional stakeholders and published literature provided content for a booklet. Iterative versions were cognitive tested with six parents facing decisions and five pediatric intensivists. Ten parents facing decisions evaluated the booklet using the Preparation for Decision Making Scale and reported their decisional conflict, which was juxtaposed to the conflict of 21 parents who did not read it, using the Decisional Conflict Scale. Twelve home ventilation program directors evaluated the booklet's clinical sensibility and sensitivity, using a self-designed six-item questionnaire. Data presented using summary statistics. RESULTS The illustrated booklet (6th-grade reading level) has nine topical sections on chronic respiratory failure and invasive and noninvasive LTV, including the option to forgo LTV. Ten parents who read the booklet rated it as helping "Quite a bit" or more on all items of the Preparation for Decision Making Scale and had seemingly less decisional conflict than 21 parents who did not. Twelve directors rated it highly for clinical sensibility and sensitivity. CONCLUSIONS The LTV booklet was rigorously developed and favorably evaluated. It offers a resource to improve patient/family knowledge, supplement shared decision-making, and reduce decisional conflict around LTV decisions. Future studies should validate it in other settings and further study its effectiveness.
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Affiliation(s)
- Jeffrey D Edwards
- Division of Critical Care and Hospital Medicine, Department of Pediatrics, Columbia University Valegos College of Physicians and Surgeons, New York, New York, USA
| | - Howard B Panitch
- Division of Pulmonary Medicine, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Maureen George
- Columbia University School of Nursing, New York, New York, USA
| | - Anne-Marie Cirrilla
- Department of Care Coordination/Social Work, New York-Presbyterian Morgan Stanley Children's Hospital, New York, New York, USA
| | - Eli Grunstein
- Division of Pediatric Otolaryngology, Columbia University Valegos College of Physicians and Surgeons, New York, New York, USA
| | - Joanne Wolfe
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.,Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Judith E Nelson
- Critical Care Service, Memorial Sloan Kettering Cancer Center, Weill Cornell Medical College, New York, New York, USA.,Palliative Medicine Service, Memorial Sloan Kettering Cancer Center, Weill Cornell Medical College, New York, New York, USA
| | - Rachel L Miller
- Division of Clinical Immunology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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9
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Johnson BN, Fierro JL, Panitch HB. Pulmonary Manifestations of Congenital Heart Disease in Children. Pediatr Clin North Am 2021; 68:25-40. [PMID: 33228936 DOI: 10.1016/j.pcl.2020.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
This review addresses how anomalous cardiovascular anatomy imparts consequences to the airway, respiratory system mechanics, pulmonary vascular system, and lymphatic system. Abnormal formation or enlargement of great vessels can compress airways and cause large and small airway obstructions. Alterations in pulmonary blood flow associated with congenital heart disease (CHD) can cause abnormalities in pulmonary mechanics and limitation of exercise. CHD can lead to pulmonary arterial hypertension. Lymphatic abnormalities associated with CHD can cause pulmonary edema, chylothorax, or plastic bronchitis. Understanding how the cardiovascular system has an impact on pulmonary growth and function can help determine options and timing of intervention.
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Affiliation(s)
- Brandy N Johnson
- Pediatric Pulmonology, Division of Pulmonary Medicine, Children's Hospital of Philadelphia, 3501 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Julie L Fierro
- Division of Pulmonary Medicine, The Perelman School of Medicine at the University of Pennsylvania, Children's Hospital of Philadelphia, 3501 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Howard B Panitch
- Technology Dependence Center, Division of Pulmonary Medicine, The Perelman School of Medicine at the University of Pennsylvania, Children's Hospital of Philadelphia, 3501 Civic Center Boulevard, Philadelphia, PA 19104, USA.
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Chotzoglou E, Hedrick HL, Herkert LM, Goldshore MA, Rintoul NE, Panitch HB. Therapy at 30 days of life predicts lung function at 6 to 12 months in infants with congenital diaphragmatic hernia. Pediatr Pulmonol 2020; 55:1456-1467. [PMID: 32191392 DOI: 10.1002/ppul.24736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/09/2020] [Indexed: 11/11/2022]
Abstract
INTRODUCTION Congenital diaphragmatic hernia (CDH) is associated with variable degrees of lung hypoplasia. Pulmonary support at 30 days postnatal age was found to be the strongest predictor of inpatient mortality and morbidity among CDH infants and was also associated with higher pulmonary morbidity at 1 and 5 years. It is not known, however, if there is a relationship between the need for medical therapy at 30 days of life and subsequent abnormalities in lung function as reflected in infant pulmonary function test (iPFT) measurements. OBJECTIVE We hypothesized that CDH infants who require more intensive therapy at 30 days would have more abnormal iPFT values at the time of their first infant pulmonary function study, reflecting the more severe spectrum of lung hypoplasia. METHODS A single-institution chart review of all CDH survivors who were enrolled in a Pulmonary Hypoplasia Program (PHP) through July 2019, and treated from 2002 to 2019 was performed. All infants were divided into groups based on their need for noninvasive (supplemental oxygen, high flow therapy, noninvasive mechanical ventilation) or invasive (mechanical ventilation, extracorporeal membrane oxygenation) respiratory assistance, bronchodilators, diuretic use, and pulmonary hypertension (PH) therapy (inhaled and/or systemic drugs) at 30 days. Descriptive and statistical analyses were performed between groups comparing subsequent lung function measurements. RESULTS A total of 382 infants (median gestational age [GA] 38.4 [interquartile range (IQR) = 37.1-39] weeks, 41.8% female, 70.9% Caucasian) with CDH were enrolled in the PHP through July 2019, and 118 infants underwent iPFT. The median age of the first iPFT was 6.6 (IQR = 5.3-11.7) months. Those requiring any pulmonary support at 30 days had a higher functional residual capacity (FRC) (z) (P = .03), residual volume (RV) (z) (P = .008), ratio of RV to total lung capacity (RV/TLC) (z) (P = .0001), and ratio of FRC to TLC (FRC/TLC) (z) (P = .001); a lower forced expiratory volume at 0.5 seconds (FEV0.5) (z) (P = .03) and a lower respiratory system compliance (Crs) (P = .01) than those who did not require any support. Similarly, those requiring diuretics and/or PH therapy at 30 days had higher fractional lung volumes, lower forced expiratory flows and Crs than infants who did not require such support (P < .05). CONCLUSIONS Infants requiring any pulmonary support, diuretics and/or PH therapy at 30 postnatal days have lower forced expiratory flows and higher fractional lung volumes, suggesting a greater degree of lung hypoplasia. Our study suggests that the continued need for PH, diuretic or pulmonary support therapy at 30 days can be used as additional risk-stratification measurements for evaluation of infants with CDH.
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Affiliation(s)
- Etze Chotzoglou
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,Department of General Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Holly L Hedrick
- Department of General Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Lisa M Herkert
- Department of General Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Matthew A Goldshore
- Department of General Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Natalie E Rintoul
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Howard B Panitch
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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11
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Cheng PC, Panitch HB, Hansen-Flaschen J. Transition of patients with neuromuscular disease and chronic ventilator-dependent respiratory failure from pediatric to adult pulmonary care. Paediatr Respir Rev 2020; 33:3-8. [PMID: 31053356 DOI: 10.1016/j.prrv.2019.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 03/28/2019] [Indexed: 11/25/2022]
Abstract
Improvements in medical care have allowed many children with neuromuscular disease and chronic respiratory failure to survive into adulthood. There are currently no published guidelines to facilitate transition from pediatric to adult respiratory care in this population. The transition process in neuromuscular disease and chronic respiratory failure is uniquely challenging in that the patients are often declining in health and losing independence as they approach adulthood. Barriers to transition include lack of access to adult providers, incompatible health insurance, loss of resources within patients' medical structures, absence of transition preparation, and patient and family insecurity with a new healthcare system. The six core elements and optimal time frame of transition should be applied, with special consideration of the psychosocial aspects associated with neuromuscular disease. Successful transition revolves around information, open communication between young adults and their medical care team, and individualized planning to ensure optimal health and quality of life.
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Affiliation(s)
- Pi Chun Cheng
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States.
| | - Howard B Panitch
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - John Hansen-Flaschen
- Division of Pulmonary, Allergy, & Critical Care, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
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12
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Hayes D, Wilson KC, Krivchenia K, Hawkins SMM, Balfour-Lynn IM, Gozal D, Panitch HB, Splaingard ML, Rhein LM, Kurland G, Abman SH, Hoffman TM, Carroll CL, Cataletto ME, Tumin D, Oren E, Martin RJ, Baker J, Porta GR, Kaley D, Gettys A, Deterding RR. Home Oxygen Therapy for Children. An Official American Thoracic Society Clinical Practice Guideline. Am J Respir Crit Care Med 2019; 199:e5-e23. [PMID: 30707039 PMCID: PMC6802853 DOI: 10.1164/rccm.201812-2276st] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Background: Home oxygen therapy is often required in children with chronic respiratory conditions. This document provides an evidence-based clinical practice guideline on the implementation, monitoring, and discontinuation of home oxygen therapy for the pediatric population. Methods: A multidisciplinary panel identified pertinent questions regarding home oxygen therapy in children, conducted systematic reviews of the relevant literature, and applied the Grading of Recommendations, Assessment, Development, and Evaluation approach to rate the quality of evidence and strength of clinical recommendations. Results: After considering the panel’s confidence in the estimated effects, the balance of desirable (benefits) and undesirable (harms and burdens) consequences of treatment, patient values and preferences, cost, and feasibility, recommendations were developed for or against home oxygen therapy specific to pediatric lung and pulmonary vascular diseases. Conclusions: Although home oxygen therapy is commonly required in the care of children, there is a striking lack of empirical evidence regarding implementation, monitoring, and discontinuation of supplemental oxygen therapy. The panel formulated and provided the rationale for clinical recommendations for home oxygen therapy based on scant empirical evidence, expert opinion, and clinical experience to aid clinicians in the management of these complex pediatric patients and identified important areas for future research.
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13
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Abstract
There is a variety of portable ventilators on the market, each with its' own features. A clinician needs to understand the unique characteristics of the ventilators available in his or her region, as well as the nuances of primary and secondary settings for these portable home ventilators in order to create a comfortable breath that allows for adequate gas exchange for the patient. Understanding the interplay of the portable home ventilator and the ventilator circuit is also a key component of transitioning a patient to a portable home ventilator. This review details characteristics of some of the more commonly used machines in the United States, as well as the settings to be considered in supporting a child with chronic respiratory failure outside of the hospital. As more patients are being discharged from the hospital with mechanical home ventilation, new ventilators are being developed that expand upon features of current machines.
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Affiliation(s)
- Julie L Fierro
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA 19104, United States.
| | - Howard B Panitch
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA 19104, United States.
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14
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Napolitano N, Jalal K, McDonough JM, Monk HM, Zhang H, Jensen E, Dysart KC, Kirpalani HM, Panitch HB. Identifying and treating intrinsic PEEP in infants with severe bronchopulmonary dysplasia. Pediatr Pulmonol 2019; 54:1045-1051. [PMID: 30950245 DOI: 10.1002/ppul.24328] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 03/01/2019] [Accepted: 03/18/2019] [Indexed: 11/11/2022]
Abstract
RATIONALE Infants with severe bronchopulmonary dysplasia (sBPD) and airway obstruction may develop dynamic hyperinflation and intrinsic positive end-expiratory pressure (PEEPi ), which impairs patient/ventilator synchrony. OBJECTIVES To determine if PEEPi is present in infants with sBPD during spontaneous breathing and if adjusting ventilator PEEP improves patient/ventilator synchrony and comfort. METHODS Interventional study in infants with sBPD. PEEPi measured by esophageal pressure (Pes) and pneumotachometer, during pressure-supported breaths. PEEP i defined as the difference between Pes at start of the inspiratory effort minus Pes at onset of inspiratory flow. The set PEEP was adjusted to minimize PEEP i . "Best PEEP" was the setting with minimal wasted efforts (WE), an inspiratory effort seen on the Pes waveform without a corresponding ventilator breath. FiO 2 and SpO 2 measured pre- and post-PEEP adjustment. Sedation requirements evaluated 72 hours preprocedure and postprocedure. RESULTS Twelve infants were assessed (gestational age, 24.9 ± 1.4 weeks; study age, 48.8 ± 1.5 weeks, postmenstrual age). Mean baseline ventilator PEEP was 16.4 cm H2 O (14-20 cm H 2 O). Eight infants required an increase, one, a reduction, and three, no change in the set PEEP. For the eight infants requiring an increase in set PEEP, there was an 18.9% reduction in WE and a reduction in FiO 2 (0.084 ± 0.058) requirements in the subsequent 24 hours. Conditional sedation was reduced in five infants postprocedure. No adverse events occurred during testing. CONCLUSION PEEPi is measurable in infants with sBPD with concurrent esophageal manometry and flow-time tracings without the need for pharmacological paralysis. In those with PEEP i , increasing ventilator PEEP to offset PEEP i improves synchrony.
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Affiliation(s)
- Natalie Napolitano
- Department of Respiratory Therapy, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Khair Jalal
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Joseph M McDonough
- Department of Respiratory Therapy, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Heather M Monk
- Department of Pharmacy Services, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Huayan Zhang
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Erik Jensen
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Kevin C Dysart
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Haresh M Kirpalani
- Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Howard B Panitch
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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15
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Ren CL, Feng R, Davis SD, Eichenwald E, Jobe A, Moore PE, Panitch HB, Sharp JK, Kisling J, Clem C. Tidal Breathing Measurements at Discharge and Clinical Outcomes in Extremely Low Gestational Age Neonates. Ann Am Thorac Soc 2018; 15:1311-1319. [PMID: 30088802 PMCID: PMC6322016 DOI: 10.1513/annalsats.201802-112oc] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 08/07/2018] [Indexed: 11/20/2022] Open
Abstract
RATIONALE The relationship between respiratory function at hospital discharge and the severity of later respiratory disease in extremely low gestational age neonates is not well defined. OBJECTIVES To test the hypothesis that tidal breathing measurements near the time of hospital discharge differ between extremely premature infants with bronchopulmonary dysplasia (BPD) or respiratory disease in the first year of life and those without these conditions. METHODS Study subjects were part of the PROP (Prematurity and Respiratory Outcomes Program) study, a longitudinal cohort study of infants born at less than 29 gestational weeks followed from birth to 1 year of age. Respiratory inductance plethysmography was used for tidal breathing measurements before and after inhaled albuterol 1 week before anticipated hospital discharge. Infants were breathing spontaneously and were receiving less than or equal to 1 L/min nasal cannula flow at 21% to 100% fraction of inspired oxygen. A survey of respiratory morbidity was administered to caregivers at 3, 6, 9, and 12 months corrected age to assess for respiratory disease. We compared tidal breathing measurements in infants with and without BPD (oxygen requirement at 36 wk) and with and without respiratory disease in the first year of life. Measurements were also performed in a comparison cohort of term infants. RESULTS A total of 765 infants survived to 36 weeks postmenstrual age, with research-quality tidal breathing data in 452 out of 564 tested (80.1%). Among these 452 infants, the rate of postdischarge respiratory disease was 65.7%. Compared with a group of 18 term infants, PROP infants had abnormal tidal breathing patterns. However, there were no clinically significant differences in tidal breathing measurements in PROP infants who had BPD or who had respiratory disease in the first year of life compared with those without these diagnoses. Bronchodilator response was not significantly associated with respiratory disease in the first year of life. CONCLUSIONS Extremely premature infants receiving less than 1 L/min nasal cannula support at 21% to 100% fraction of inspired oxygen have tidal breathing measurements that differ from term infants, but these measurements do not differentiate those preterm infants who have BPD or will have respiratory disease in the first year of life from those who do not. Clinical trial registered with www.clinicaltrials.gov (NCT01435187).
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Affiliation(s)
- Clement L. Ren
- Riley Hospital for Children and Indiana University, Indianapolis, Indiana
| | - Rui Feng
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Stephanie D. Davis
- Riley Hospital for Children and Indiana University, Indianapolis, Indiana
| | - Eric Eichenwald
- Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Alan Jobe
- Children’s Hospital Medical Center, Cincinnati, Ohio
| | - Paul E. Moore
- Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | | | - Jeff Kisling
- Riley Hospital for Children and Indiana University, Indianapolis, Indiana
| | - Charles Clem
- Riley Hospital for Children and Indiana University, Indianapolis, Indiana
| | - on behalf of the Prematurity and Respiratory Outcomes Program*
- Riley Hospital for Children and Indiana University, Indianapolis, Indiana
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
- Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
- Children’s Hospital Medical Center, Cincinnati, Ohio
- Vanderbilt University School of Medicine, Nashville, Tennessee
- Texas Children’s Hospital, Houston, Texas; and
- Washington University, St. Louis, Missouri
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16
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Abstract
Children with progressive neuromuscular weakness undergo a stereotypical progression of respiratory involvement, beginning with impaired airway clearance and progressing to nocturnal and then diurnal ventilatory failure. This review examines issues related to airway clearance and mucus mobilization, sleep problems, and use of assisted ventilation in children with neuromuscular diseases. Interventions for each of these problems have been created or adapted for the pediatric population. The use of airway clearance therapies and assisted ventilation have improved survival of children with neuromuscular weakness. Questions regarding the best time to introduce some therapies, the therapeutic utility of certain interventions, and the cost-effectiveness of various treatments demand further investigation. Studies that assess the potential to improve quality of life and reduce hospitalizations and frequency of lower-respiratory tract infections will help clinicians to decide which techniques are best suited for use in children. As children with neuromuscular disease survive longer, coordinated programs for transitioning these patients to adult care must be developed to enhance their quality of life.
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Affiliation(s)
- Howard B Panitch
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, and the Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
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17
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Edwards JD, Panitch HB, Constantinescu A, Miller RL, Stone PW. Survey of financial burden of families in the U.S. with children using home mechanical ventilation. Pediatr Pulmonol 2018; 53:108-116. [PMID: 29152895 PMCID: PMC5737909 DOI: 10.1002/ppul.23917] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 10/30/2017] [Indexed: 11/09/2022]
Abstract
AIM To describe and quantify the out-of-pocket expenses, employment loss, and other financial impact related to caring for a child using home mechanical ventilation (HMV). METHOD We conducted a cross-sectional survey of U.S. families with children who used HMV. Eligible participants were invited to complete a questionnaire addressing household and child characteristics, out-of-pocket expenses, employment loss/reduction, and financial stress. Participants were recruited with the help of three national patient registries. RESULTS Two hundred twenty-six participants from 32 states (152 with children who used invasive ventilation and 74 with children who used noninvasive ventilation) completed the questionnaire. Participants' median reported yearly household income was $90 000 (IQR 70 000-150 000). The median amount paid in out-of-pocket expenses in the previous 3 months to care for their child using HMV totaled $3899 (IQR $2900-4550). Reported levels of financial stress decreased as income increased; 37-60% of participants, depending on income quintile, reported moderate financial stress with "some" of that stress due to their out-of-pocket expenses. A substantial majority reported one or more household members stopped or reduced work and took unpaid weeks off of work to care for their child. CONCLUSION The financial impact of caring for a child using HMV is considerable for some families. Providers need to understand these financial burdens and should inform families of them to help families anticipate and plan for them.
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Affiliation(s)
- Jeffrey D Edwards
- Division of Pediatric Critical Care, Department of Pediatrics, Columbia University College of Physician and Surgeons, New York, New York
| | - Howard B Panitch
- Division of Pulmonary Medicine, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Andrei Constantinescu
- Division of Pediatric Pulmonology, Department of Pediatrics, Columbia University College of Physician and Surgeons, New York, New York
| | - Rachel L Miller
- Division of Pediatric Allergy, Immunology and Rheumatology, Department of Pediatrics, Columbia University College of Physician and Surgeons, New York, New York
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18
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Affiliation(s)
- Howard B Panitch
- Perelman School of Medicine at The University of Pennsylvania, Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA.
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19
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Abstract
Non-invasive ventilation (NIV) is used in neonates to treat extrathoracic and intrathoracic airway obstruction, parenchymal lung disease and disorders of control of breathing. Avoidance of airway intubation is associated with a reduction in the incidence of chronic lung disease among preterm infants with respiratory distress syndrome. Use of nasal continuous positive airway pressure (nCPAP) may help establish and maintain functional residual capacity (FRC), decrease respiratory work, and improve gas exchange. Other modes of non-invasive ventilation, which include heated humidified high-flow nasal cannula therapy (HHHFNC), nasal intermittent mandatory ventilation (NIMV), non-invasive pressure support ventilation (NI-PSV), and bi-level CPAP (SiPAP™), have also been shown to provide additional benefit in improving breathing patterns, reducing work of breathing, and increasing gas exchange when compared with nCPAP. Newer modes, such as neurally adjusted ventilatory assist (NAVA), hold the promise of improving patient-ventilator synchrony and so might ultimately improve outcomes for preterm infants with respiratory distress.
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Affiliation(s)
- Stamatia Alexiou
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
| | - Howard B Panitch
- The Perelman School of Medicine at The University of Pennsylvania, Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
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20
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21
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Abstract
Intrathoracic tracheomalacia is characterized by increased compliance of the central airway within the thorax. This leads to excessive dynamic collapse during exhalation or periods of increased intrathoracic pressure such as crying. Extrathoracic tracheomalacia involves dynamic collapse of the airway between the glottis and sternal notch that occurs during inhalation rather than exhalation. The tone of the posterior membrane of the trachea increases throughout development and childhood, as does the rigidity of the tracheal cartilage. Abnormalities of airway maturation result in congenital tracheomalacia. Acquired tracheomalacia occurs in the normally developed trachea due to trauma, external compression, or airway inflammation. Although tracheomalacia can be suspected by history, physical examination, and supportive radiographic findings, flexible fiberoptic bronchoscopy remains the "gold standard" for diagnosis. Current treatment strategies involve pharmacotherapy with cholinergic agents, positive pressure ventilation, and surgical repair.
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Affiliation(s)
- Erik B Hysinger
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA 19104.
| | - Howard B Panitch
- Perelman School of Medicine at the University of Pennsylvania, Attending Physician, Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA 19104.
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22
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Davis SD, Ratjen F, Brumback LC, Johnson RC, Filbrun AG, Kerby GS, Panitch HB, Donaldson SH, Rosenfeld M. Infant lung function tests as endpoints in the ISIS multicenter clinical trial in cystic fibrosis. J Cyst Fibros 2015; 15:386-91. [PMID: 26547590 DOI: 10.1016/j.jcf.2015.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 10/13/2015] [Accepted: 10/14/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND The Infant Study of Inhaled Saline (ISIS) in CF was the first multicenter clinical trial to utilize infant pulmonary function tests (iPFTs) as an endpoint. METHODS Secondary analysis of ISIS data was conducted in order to assess feasibility of iPFT measures and their associations with respiratory symptoms. Standard deviations were calculated to aid in power calculations for future clinical trials. RESULTS Seventy-three participants enrolled, 70 returned for the final visit; 62 (89%) and 45 (64%) had acceptable paired functional residual capacity (FRC) and raised volume measurements, respectively. Mean baseline FEV0.5, FEF75 and FRC z-scores were 0.3 (SD: 1.2), -0.2 (SD: 2.0), and 1.8 (SD: 2.0). CONCLUSIONS iPFTs are not appropriate primary endpoints for multicenter clinical trials due to challenges of obtaining acceptable data and near-normal average raised volume measurements. Raised volume measures have potential to serve as secondary endpoints in future clinical CF trials.
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Affiliation(s)
- Stephanie D Davis
- Section of Pediatric Pulmonology, Allergy and Sleep Medicine, Department of Pediatrics, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Felix Ratjen
- Division of Respiratory Medicine, Department of Pediatrics, the Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Lyndia C Brumback
- Department of Biostatistics, University of Washington, Seattle, WA, USA
| | - Robin C Johnson
- Division of Pediatric Pulmonology, Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Amy G Filbrun
- Pediatric Pulmonary Division, Department of Pediatrics, CS Mott Children's Hospital, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Gwendolyn S Kerby
- Department of Pediatrics, The Breathing Institute, University of Colorado and Children's Hospital, Aurora, CO, USA
| | - Howard B Panitch
- Division of Pulmonary Medicine, Department of Pediatrics, The Children's Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Scott H Donaldson
- Division of Pulmonary and Critical Care, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Margaret Rosenfeld
- Division of Pulmonary Medicine, Seattle Children's Hospital and Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
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23
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Panitch HB, Weiner DJ, Feng R, Perez MR, Healy F, McDonough JM, Rintoul N, Hedrick HL. Lung function over the first 3 years of life in children with congenital diaphragmatic hernia. Pediatr Pulmonol 2015; 50:896-907. [PMID: 25045135 DOI: 10.1002/ppul.23082] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 05/30/2014] [Indexed: 11/06/2022]
Abstract
OBJECTIVES Infants with congenital diaphragmatic hernia (CDH) have variable degrees of pulmonary hypoplasia at birth. Few reports of lung function over the first years of life exist in this group of children. HYPOTHESIS Pulmonary function abnormalities correlate with severity of neonatal disease and intensity of neonatal therapies needed. We also hypothesized that longitudinal measurements of lung function over the usual period of rapid lung growth would lend some insight into how the lung remodels in CDH infants. METHODOLOGY Ninety-eight infants with CDH between 11 days and 44 months of age underwent pulmonary function testing (PFT) on 1-5 occasions using the raised volume rapid thoracic compression technique. Demographic data were also collected. MAIN RESULTS Forced expiratory flows were below normal. Total lung capacity was normal, but residual volume and functional residual capacity were elevated. Children requiring patch closure, ECMO, or pulmonary vasodilators generally had lower lung functions at follow up. Additionally, longer duration of mechanical ventilation correlated with worse lung function. CONCLUSIONS Lung functions of survivors of CDH remain abnormal throughout the first 3 years of life. The degree of pulmonary function impairment correlated both with markers of the initial degree of pulmonary hypoplasia and the duration of mechanical ventilation. Understanding the relationship between the phenotypic presentation of CDH and the potential for subsequent lung growth could help refine both pre- and postnatal therapies to optimize lung growth in CDH infants.
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Affiliation(s)
- Howard B Panitch
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Daniel J Weiner
- Division of Pulmonary Medicine, The Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - Rui Feng
- Department of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, Pittsburgh, Pennsylvania
| | - Myrza R Perez
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Fiona Healy
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Joseph M McDonough
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Natalie Rintoul
- Division of Neonatology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Holly L Hedrick
- Department of General Surgery, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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24
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Healy F, Lin W, Feng R, Hanna BD, Hedrick H, Panitch HB. An association between pulmonary hypertension and impaired lung function in infants with congenital diaphragmatic hernia. Pediatr Pulmonol 2015; 50:672-82. [PMID: 24623605 DOI: 10.1002/ppul.23035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 02/16/2014] [Accepted: 02/20/2014] [Indexed: 02/02/2023]
Abstract
RATIONALE Infants with congenital diaphragmatic hernia (CDH) can develop pulmonary hypertension (PH) from decreased number and abnormal muscularization of pulmonary arteries. Normally pulmonary vascular growth and remodeling parallel airspace growth and alveolarization, which exhibits a wide morphologic variation in CDH. AIM To assess whether infants with CDH and PH have greater abnormalities in infant pulmonary function testing (IPFT) compared to those without PH. METHODS We reviewed results of IPFTs and echocardiograms performed on infants with CDH from 2004 to June 2011. Lung volumes, forced flows and tidal mechanics were standardized according to available reference values. Comparisons between infants with and without PH were performed using linear regression, adjusting for potential confounders. MAIN RESULTS Sixty-six infants were included; 18 had PH and 48 did not. Z-score values for functional residual capacity (FRC), residual volume (RV), FRC/total lung capacity (TLC), and RV/TLC were significantly higher in infants with CDH and PH compared to those without PH. Z-score values for forced flows including forced expiratory volume in the first 0.5 sec (FEV0.5) and FEV0.5/forced vital capacity were significantly lower in infants with CDH and PH compared to those without PH. For 29 infants studied on ≥2 occasions, the slopes of FRC, RV, and TLC versus length were significantly higher in those with persistent PH compared to those without. CONCLUSIONS Infants with CDH and persistent PH demonstrate greater airspace overdistension with growth compared to those without. Therapies that modify disrupted pulmonary vascular and alveolar formation could potentially improve future care of these patients.
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Affiliation(s)
- Fiona Healy
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Wei Lin
- Department of Biostatistics & Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | - Rui Feng
- Department of Biostatistics & Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | - Brian D Hanna
- Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Holly Hedrick
- Department of General Surgery, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Howard B Panitch
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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Abstract
The abdominal wall is an integral component of the chest wall. Defects in the ventral abdominal wall alter respiratory mechanics and can impair diaphragm function. Congenital abdominal wall defects also are associated with abnormalities in lung growth and development that lead to pulmonary hypoplasia, pulmonary hypertension, and alterations in thoracic cage formation. Although infants with ventral abdominal wall defects can experience life-threatening pulmonary complications, older children typically experience a more benign respiratory course. Studies of lung and chest wall function in older children and adolescents with congenital abdominal wall defects are few; such investigations could provide strategies for improved respiratory performance, avoidance of respiratory morbidity, and enhanced exercise ability for these children.
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Affiliation(s)
- Howard B Panitch
- Professor of Pediatrics, Perelman School of Medicine at The University of Pennsylvania, Division of Pulmonary Medicine, The Children's Hospital of Philadelphia.
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Partridge EA, Hanna BD, Panitch HB, Rintoul NE, Peranteau WH, Flake AW, Scott Adzick N, Hedrick HL. Pulmonary hypertension in giant omphalocele infants. J Pediatr Surg 2014; 49:1767-70. [PMID: 25487480 DOI: 10.1016/j.jpedsurg.2014.09.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Accepted: 09/05/2014] [Indexed: 10/24/2022]
Abstract
BACKGROUND Pulmonary hypoplasia has been described in cases of giant omphalocele (GO), although pulmonary hypertension (PH) has not been extensively studied in this disorder. In the present study, we describe rates and severity of PH in GO survivors who underwent standardized prenatal and postnatal care at our institution. METHODS A retrospective chart review was performed for all patients in our pulmonary hypoplasia program with a diagnosis of GO. Statistical significance was calculated using Fisher's exact test and Mann-Whitney test (p<0.05). RESULTS Fifty-four patients with GO were studied, with PH diagnosed in twenty (37%). No significant differences in gender, gestational ages, birth weight, or Apgar scores were associated with PH. Patients diagnosed with PH were managed with interventions, including high frequency oscillatory ventilation, and nitric oxide. Nine patients required long-term pulmonary vasodilator therapy. PH was associated with increased length of hospital stay (p<0.001), duration of mechanical ventilation (p=0.008), and requirement for tracheostomy (p=0.0032). Overall survival was high (94%), with significantly increased mortality in GO patients with PH (p=0.0460). Prenatal imaging demonstrating herniation of the stomach into the defect was significantly associated with PH (p=0.0322), with a positive predictive value of 52%. CONCLUSIONS In this series, PH was observed in 37% of GO patients. PH represents a significant complication of GO, and management of pulmonary dysfunction is a critical consideration in improving clinical outcomes in these patients.
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Affiliation(s)
- Emily A Partridge
- Department of Surgery, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, United States
| | - Brian D Hanna
- Division of Cardiology, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, 19104
| | - Howard B Panitch
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, United States
| | - Natalie E Rintoul
- Division of Neonatology, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, United States
| | - William H Peranteau
- Department of Surgery, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, United States
| | - Alan W Flake
- Department of Surgery, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, United States
| | - N Scott Adzick
- Department of Surgery, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, United States
| | - Holly L Hedrick
- Department of Surgery, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, United States.
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Finkel RS, Weiner DJ, Mayer OH, McDonough JM, Panitch HB. Respiratory muscle function in infants with spinal muscular atrophy type I. Pediatr Pulmonol 2014; 49:1234-42. [PMID: 24777943 DOI: 10.1002/ppul.22997] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 01/06/2014] [Indexed: 11/10/2022]
Abstract
OBJECTIVE To determine the feasibility and safety of respiratory muscle function testing in weak infants with a progressive neuromuscular disorder. RATIONALE Respiratory insufficiency is the major cause of morbidity and mortality in infants with spinal muscular atrophy type I (SMA-I). HYPOTHESIS Tests of respiratory muscle strength, endurance, and breathing patterns can be performed safely in SMA-I infants. Useful data can be collected which parallels the clinical course of pulmonary function in SMA-I. STUDY DESIGN AND SUBJECT SELECTION An exploratory study of respiratory muscle function testing and breathing patterns in seven infants with SMA-I seen in our neuromuscular clinic. Measurements were made at initial study visit and, where possible, longitudinally over time. METHODOLOGY We measured maximal inspiratory (MIP) and transdiaphragmatic pressures, mean transdiaphragmatic pressure, airway occlusion pressure at 100 msec of inspiration, inspiratory and total respiratory cycle time, and aspects of relative thoracoabdominal motion using respiratory inductive plethysmography (RIP). The tension time index of the diaphragm and of the respiratory muscles, phase angle (Φ), phase relation during the total breath, and labored breathing index were calculated. RESULTS Age at baseline study was 54-237 (median 131) days. Reliable data were obtained safely for MIP, phase angle, labored breathing index, and the invasive and non-invasive tension time indices, even in very weak infants. Data obtained corresponded to the clinical estimate of severity and predicted the need for respiratory support. CONCLUSIONS The testing employed was both safe and feasible. Measurements of MIP and RIP are easily performed tests that are well tolerated and provide clinically useful information for infants with SMA-I.
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Affiliation(s)
- Richard S Finkel
- Divisions of Neurology, Nemours Children's Hospital, Orlando, Florida
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Miske LJ, McDonough JM, Weiner DJ, Panitch HB. Changes in gastric pressure and volume during mechanical in-exsufflation. Pediatr Pulmonol 2013; 48:824-9. [PMID: 22949331 DOI: 10.1002/ppul.22671] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 07/30/2012] [Indexed: 11/10/2022]
Abstract
BACKGROUND/PURPOSE A mechanical insufflator-exsufflator (MI-E) is used to replicate spontaneous cough in weak or neurologically impaired patients. Its use is often withheld after abdominal surgery because of concerns for potential wound dehiscence from abdominal distension or development of excessive abdominal positive pressure. We hypothesized that gastric pressure during MI-E use would not exceed usual pressures generated during a spontaneous cough. METHODS Thirteen subjects 0.8-23.1 years (mean 10.5 years) with neuromuscular weakness, pre-existing gastrostomy tube, and established MI-E routine were studied. A pressure transducer through the gastrostomy tube measured gastric pressure (Pgas) during MI-E treatment. Chest and abdominal volume change was assessed by respiratory inductance plethysmography. In three subjects, the same measurements were made during spontaneous cough. RESULTS The maximum Pgas was 24 cm with applied pressures of 20-40 cm. In the three subjects able to cough, the maximum Pgas achieved during the spontaneous maneuver was 25 cm, a value higher than they achieved with MI-E treatment. CONCLUSION MI-E resulted in less positive abdominal pressure than has been described in healthy subjects during spontaneous coughing. As such, use of an MI-E device should be considered safe to use in the post-operative period following abdominal surgery in patients with neuromuscular weakness.
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Affiliation(s)
- Laura J Miske
- Department of Nursing, The Children's Hospital of Philadelphia, Pennsylvania 19104, USA.
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Danzer E, Hedrick HL, Rintoul NE, Siegle J, Adzick NS, Panitch HB. Assessment of early pulmonary function abnormalities in giant omphalocele survivors. J Pediatr Surg 2012; 47:1811-20. [PMID: 23084189 DOI: 10.1016/j.jpedsurg.2012.06.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 05/02/2012] [Accepted: 06/10/2012] [Indexed: 11/29/2022]
Abstract
PURPOSE Infants with giant omphalocele (GO) are at increased risk for persistent respiratory insufficiency, yet information regarding the systematic assessment of their lung function is limited. We performed a group of pulmonary function tests (PFTs) including spirometry, fractional lung volume measurements, assessment of bronchodilator responsiveness, and passive respiratory mechanics in GO survivors during infancy and early childhood to evaluate the nature and degree of pulmonary dysfunction. MATERIAL AND METHODS Between July 2004 and June 2008, 30 consecutive GO survivors were enrolled in our interdisciplinary follow-up program. Forty-seven percent (14/30) underwent PFT during follow-up evaluation using the raised volume rapid thoracic compression technique to measure forced expiratory flows and bronchodilator responsiveness, body plethysmography to calculate lung volumes, and the single breath occlusion technique to measure passive mechanics of the respiratory system. RESULTS The mean age at PFT assessment was 19.3 ± 19.7 months (range, 1.0-58). Mean forced vital capacity and mean forced expiratory volume in the first 0.5 second were significantly reduced compared with published normative values (P = .03 and P < .01, respectively). Total lung capacity was significantly reduced (P < .001), whereas functional residual capacity, residual volume, and residual volume to total lung capacity ratio were within the normative range (P = .21, P = .34, and P = .48, respectively). Among the 46% who demonstrated significant bronchodilator responsiveness, there were greater increases in the mean percentage changes in flow at 25% to 75% (P = .01), flow at 75% (P < .001), and flow at 85% (P < .001) compared with those participants that did not respond. Specific compliance was reduced, whereas specific conductance increased, compared with published normal results. CONCLUSIONS Abnormalities of pulmonary function in GO survivors include lung volume restriction without airway obstruction, an increased likelihood of airway hyperresponsivness, and reduced respiratory system specific compliance. Early recognition of pulmonary functional impairment in GO survivors could help to develop targeted treatment strategies to reduce the risk of subsequent pulmonary morbidity.
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Affiliation(s)
- Enrico Danzer
- Department of Surgery, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.
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30
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Affiliation(s)
- Fiona Healy
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
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Panitch HB. Paediatric neuromuscular diseases: the future is now. Paediatr Respir Rev 2010; 11:1-2. [PMID: 20113984 DOI: 10.1016/j.prrv.2009.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Nino G, McNally P, Miske LJ, Hickey E, Panitch HB. Use of intrapulmonary percussive ventilation (IPV) in the management of pulmonary complications of an infant with osteogenesis imperfecta. Pediatr Pulmonol 2009; 44:1151-4. [PMID: 19824049 DOI: 10.1002/ppul.21112] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Osteogenesis imperfecta (OI) is a genetic disorder characterized by abnormal collagen formation and short stature. These patients present with frequent vertebral, rib, and long bone fractures. There are many respiratory complications associated with OI including pneumonia, the most common cause of mortality in the severe forms of the disease. We present a case of an infant with OI (type III/IV) and significant tracheobronchomalacia who had required multiple hospitalizations for recurrent atelectasis and respiratory failure in the setting of acute respiratory infections. External chest percussion and vibration were avoided because of the risk of rib fractures. intrapulmonary percussive ventilation (IPV) was initiated during an acute illness with good effect, and continued successfully after discharge from hospital. We conclude that IPV represents a safe and effective alternative to airway clearance in infants with OI.
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Affiliation(s)
- Gustavo Nino
- Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
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Abstract
This is a summary of the presentation on the pathophysiology of respiratory impairment in pediatric neuromuscular disorders presented as part of the program on pulmonary management of pediatric patients with neuromuscular disease at the 30th annual Carrell-Krusen Neuromuscular Symposium on February 20, 2008.
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Affiliation(s)
- Howard B Panitch
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA.
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Huang J, Marcus CL, Bandla P, Schwartz MS, Pepe ME, Samuel JM, Panitch HB, Bradford RM, Mosse YP, Maris JM, Colrain IM. Cortical processing of respiratory occlusion stimuli in children with central hypoventilation syndrome. Am J Respir Crit Care Med 2008; 178:757-64. [PMID: 18658113 DOI: 10.1164/rccm.200804-606oc] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE The ability of patients with central hypoventilation syndrome (CHS) to produce and process mechanoreceptor signals is unknown. OBJECTIVES Children with CHS hypoventilate during sleep, although they generally breathe adequately during wakefulness. Previous studies suggest that they have compromised central integration of afferent stimuli, rather than abnormal sensors or receptors. Cortical integration of afferent mechanical stimuli caused by respiratory loading or upper airway occlusion can be tested by measuring respiratory-related evoked potentials (RREPs). We hypothesized that patients with CHS would have blunted RREP during both wakefulness and sleep. METHODS RREPs were produced with multiple upper airway occlusions and were obtained during wakefulness, stage 2, slow-wave, and REM sleep. Ten patients with CHS and 20 control subjects participated in the study, which took place at the Children's Hospital of Philadelphia. Each patient was age- and sex-matched to two control subjects. Wakefulness data were collected from 9 patients and 18 control subjects. MEASUREMENTS AND MAIN RESULTS During wakefulness, patients demonstrated reduced Nf and P300 responses compared with control subjects. During non-REM sleep, patients demonstrated a reduced N350 response. In REM sleep, patients had a later P2 response. CONCLUSIONS CHS patients are able to produce cortical responses to mechanical load stimulation during both wakefulness and sleep; however, central integration of the afferent signal is disrupted during wakefulness, and responses during non-REM are damped relative to control subjects. The finding of differences between patients and control subjects during REM may be due to increased intrinsic excitatory inputs to the respiratory system in this state.
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Affiliation(s)
- Jingtao Huang
- The Sleep Center, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
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35
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Huang J, Colrain IM, Panitch HB, Tapia IE, Schwartz MS, Samuel J, Pepe M, Bandla P, Bradford R, Mosse YP, Maris JM, Marcus CL. Effect of sleep stage on breathing in children with central hypoventilation. J Appl Physiol (1985) 2008; 105:44-53. [PMID: 18499780 PMCID: PMC2494838 DOI: 10.1152/japplphysiol.01269.2007] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Accepted: 05/19/2008] [Indexed: 11/22/2022] Open
Abstract
The early literature suggests that hypoventilation in infants with congenital central hypoventilation syndrome (CHS) is less severe during rapid eye movement (REM) than during non-REM (NREM) sleep. However, this supposition has not been rigorously tested, and subjects older than infancy have not been studied. Given the differences in anatomy, physiology, and REM sleep distribution between infants and older children, and the reduced number of limb movements during REM sleep, we hypothesized that older subjects with CHS would have more severe hypoventilation during REM than NREM sleep. Nine subjects with CHS, aged (mean +/- SD) 13 +/- 7 yr, were studied. Spontaneous ventilation was evaluated by briefly disconnecting the ventilator under controlled circumstances. Arousal was common, occurring in 46% of REM vs. 38% of NREM trials [not significant (NS)]. Central apnea occurred during 31% of REM and 54% of NREM trials (NS). Although minute ventilation declined precipitously during both REM and NREM trials, hypoventilation was less severe during REM (drop in minute ventilation of 65 +/- 23%) than NREM (drop of 87 +/- 16%, P = 0.036). Despite large changes in gas exchange during trials, there was no significant change in heart rate during either REM or NREM sleep. We conclude that older patients with CHS frequently have arousal and central apnea, in addition to hypoventilation, when breathing spontaneously during sleep. The hypoventilation in CHS is more severe during NREM than REM sleep. We speculate that this may be due to increased excitatory inputs to the respiratory system during REM sleep.
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Affiliation(s)
- Jingtao Huang
- Sleep Center, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
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Weiner DJ, McDonough J, Perez M, Evans J, Fox W, Hedgman A, Tyler L, Panitch HB. Heated, humidified high-flow nasal cannula therapy. Pediatrics 2008; 121:1293-4; author reply 1294. [PMID: 18519506 DOI: 10.1542/peds.2008-0511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Daniel J. Weiner
- Department of Pulmonary Medicine
Children's Hospital of Pittsburgh
Pittsburgh, PA 15213
| | | | | | | | | | | | | | - Howard B. Panitch
- Department of Pulmonary Medicine
Children's Hospital of Philadelphia
Philadelphia, PA 19104
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Birnkrant DJ, Panitch HB, Benditt JO, Boitano LJ, Carter ER, Cwik VA, Finder JD, Iannaccone ST, Jacobson LE, Kohn GL, Motoyama EK, Moxley RT, Schroth MK, Sharma GD, Sussman MD. American College of Chest Physicians Consensus Statement on the Respiratory and Related Management of Patients With Duchenne Muscular Dystrophy Undergoing Anesthesia or Sedation. Chest 2007; 132:1977-86. [DOI: 10.1378/chest.07-0458] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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Affiliation(s)
- Howard B Panitch
- University of Pennsylvania School of Medicine, Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA.
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Miske LJ, Hickey EM, McDonough J, Weiner DJ, Panitch HB. CHANGES IN ABDOMINAL PRESSURE AND VOLUME WITH USE OF THE MECHANICAL IN-EXSUFFLATOR. Chest 2006. [DOI: 10.1378/chest.130.4_meetingabstracts.137s-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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40
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Panitch HB. Respiratory issues in the management of children with neuromuscular disease. Respir Care 2006; 51:885-93; discussion 894-5. [PMID: 16867199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Most children with neuromuscular disease eventually require assistance with airway clearance and with breathing, especially during sleep. Techniques and devices for airway clearance and noninvasive ventilation that are commonly used in adults have been successfully adapted for use in infants and young children. Both physiological differences and small size of young patients with neuromuscular disease, however, can limit the applicability of such interventions or require special consideration. Measurements to identify the appropriate time to begin airway clearance assistance are lacking for young children, and the role of early introduction of noninvasive ventilation to preserve or enhance lung growth and chest-wall mobility remains to be elucidated. The paucity of nasal interfaces and headgear commercially made for small patients can reduce patient tolerance of noninvasive ventilation and exacerbate patient-ventilator dyssynchrony. Despite these issues, a greater number of children with neuromuscular diseases are living well past their second decade. Strategies to transition these patients to appropriate adult-care providers, to secure cost-effective health care for them, and to help integrate them into adult society must be developed.
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Abstract
The incidence of bronchopulmonary dysplasia (BPD), defined as oxygen need at 36 weeks of postmenstrual age, is about 30% for infants with birth weights <1000 g. BPD is associated with persistent structural changes in the lung that result in significant effects on lung mechanics, gas exchange, and pulmonary vasculature. Up to 50% of infants with BPD require readmission to the hospital for lower respiratory tract illness in the first year of life. Long-term measurements of lung function in BPD include normalization of pulmonary mechanics and some lung volumes over time as somatic and lung growth occur, whereas abnormality of small airway function persists. The majority of data reveals no long-term decrease in exercise capacity. Mild to moderate radiological abnormalities persist. BPD is a result of dynamic processes involving inflammation, injury, repair, and maturation. Infants with BPD have significant pulmonary sequelae during childhood and adolescence, and continued surveillance of young adults with BPD is critical.
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Affiliation(s)
- Anita Bhandari
- Division of Pediatric Pulmonology, University of Connecticut, Connecticut Children's Medical Center, Hartford, CT 06106, USA.
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42
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Abstract
PURPOSE OF REVIEW Assistance with airway clearance is critical for reducing morbidity and mortality in children with neuromuscular weakness. Several techniques and devices are available to enhance airway clearance in patients with neuromuscular disease. Only recently, however, has assessment of their effectiveness included children. This review highlights the rationale for use of both secretion extraction and mucus mobilization techniques and devices, emphasizing findings in pediatric patients whenever possible. RECENT FINDINGS Cough in adults is adequate when peak cough flow exceeds 160 l/min. Similar threshold values in young children have not been established. Those methods that enhance secretion extraction include breath stacking, manual or mechanical insufflation, manually assisted cough, and mechanical insufflation-exsufflation. All are well tolerated in children and can increase peak cough flows, although the greatest increase occurs with mechanical insufflation-exsufflation. Techniques successfully used to help mobilize secretions include high frequency chest wall oscillation and intrapulmonary percussive ventilation. Various modalities can be used successfully alone or in combination. SUMMARY Secretion extraction and mobilization techniques are safe, even in infants who require airway clearance assistance. To date, however, criteria specific for children are lacking to determine when such modalities should be used and which ones are most effective.
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Affiliation(s)
- Howard B Panitch
- The University of Pennsylvania School of Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA.
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43
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Affiliation(s)
- Howard B Panitch
- Department of Pediatrics, University of Pennsylvania School of Medicine, and the Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA.
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44
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Affiliation(s)
- Howard B Panitch
- University of Pennsylvania School of Medicine and The Children's Hospital of Philadelphia, Philadelphia, PA, USA
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Abstract
BACKGROUND Viral acute respiratory infections represent a significant cause of morbidity and mortality across all ages, especially in patients with chronic underlying conditions. Although recognized anecdotally, the risks of viral infection to those children with chronic underlying conditions rendering them technology dependent, or to those children with neuromuscular disorders, have not been well studied. METHODS Studies of children with underlying conditions that result in technology dependence and those with neuromuscular disorders who required hospitalization for respiratory syncytial virus infection are reviewed. Additionally surveys of physician perceptions toward risk factors for severe viral illness and prevention in this population of patients are reported. Possible mechanisms to explain the increased risk of disease severity with viral respiratory infections are explored as well. RESULTS Current or recent use of supplemental oxygen is associated with more severe disease in children with chronic underlying conditions, especially bronchopulmonary dysplasia. Supplemental oxygen use may be a marker for several factors known to increase the severity of viral respiratory illnesses. Children with neuromuscular weakness are also likely to experience more severe disease, most likely resulting from compromised airway clearance. CONCLUSIONS Although the number of children who are technology-dependent or have severe neuromuscular weakness is small, their risk of severe disease after viral respiratory infection may be similar to that of premature infants or other high risk groups. A better understanding of the factors responsible for severe viral disease in these children would help create better strategies for treatment and prevention.
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Affiliation(s)
- Howard B Panitch
- University of Pennsylvania School of Medicine, Division of Pulmonary Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
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46
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Miske LJ, Panitch HB. Don't Forget the Abdominal Thrust. Chest 2004. [DOI: 10.1016/s0012-3692(15)31336-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Miske LJ, Hickey EM, Kolb SM, Weiner DJ, Panitch HB. Use of the mechanical in-exsufflator in pediatric patients with neuromuscular disease and impaired cough. Chest 2004; 125:1406-12. [PMID: 15078753 DOI: 10.1378/chest.125.4.1406] [Citation(s) in RCA: 124] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Impaired cough secondary to weakness from neuromuscular disease (NMD) can cause serious respiratory complications, including atelectasis, pneumonia, small airway obstruction, and acidosis. The mechanical in-exsufflator (MI-E) delivers a positive-pressure insufflation followed by an expulsive exsufflation, thereby simulating a normal cough. Use of the MI-E in adults with impaired cough results in improved cough flows and enhanced airway clearance. However, only limited reports of MI-E use in children exist. OBJECTIVE To determine the safety, tolerance, and effectiveness of the MI-E in a pediatric population. METHOD Retrospective medical record review. PARTICIPANTS Sixty-two patients (34 male patients) observed in a pediatric pulmonary program with NMD and impaired cough in whom MI-E therapy was initiated. Median age at initiation of MI-E use was 11.3 years (range, 3 months to 28.6 years). Diagnoses included the following: Duchenne muscular dystrophy (17 patients); spinal muscular atrophy, types I and II (21 patients); myopathy (12 patients); other nonspecific NMD (12 patients). Mechanical ventilation via tracheostomy was used in 29 patients, and 25 patients used noninvasive ventilation. RESULTS The median duration of use was 13.4 months (range, 0.5 to 45.5 months). One infant died before using MI-E at home. Five patients chose not to continue MI-E therapy. Complications were reported in two patients, but ultimately they used the MI-E device. Chronic atelectasis resolved in four patients after beginning MI-E therapy, and five patients experienced a reduction in the frequency of pneumonias. CONCLUSION In 90% of our study population, the use of an MI-E was safe, well-tolerated, and effective in preventing pulmonary complications.
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Affiliation(s)
- Laura J Miske
- Department of Nursing, University of Pennsylvania School of Medicine, The Children's Hospital of Philadelphia, Philadelphia 19104, USA.
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Abstract
Until they are fully mature, the airways are highly susceptible to damage. Factors that may contribute to vulnerability of immature airways and the occurrence of bronchopulmonary dysplasia (BPD) in preterm neonates include decreased contractility of smooth muscles of the airway, which leads to generation of lower forces, and immaturity of airway cartilage, leading to increased compressibility of developing airways. Mechanical ventilation has little effect on adult airways, but affects the dimensions and mechanical properties of preterm and newborn airways. Techniques for clinical evaluation of airway function include: (i). measurements of airway function during tidal breathing (airway resistance and reactivity are significantly elevated in infants with BPD); (ii). forced expiratory flow measurements [small-airway obstruction in infants with BPD is indicated by markedly reduced maximal volume measurements (Vmax)]; (iii). radiography procedures (plain radiographs, fluoroscopy, computed tomography and virtual bronchoscopy); and (iv). endoscopy procedures (rigid or flexible bronchoscopy, with or without measurement of oesophageal pressure). Imaging has demonstrated an excessively decreased airway cross-sectional area during exhalation in infants with BPD and acquired tracheomegaly in very preterm infants who had received mechanical ventilatory support. To further advance our understanding of how the airways develop, and to design less damaging protocols for mechanical ventilation in preterm neonates, basic laboratory studies of airway ultrastructure need to be performed and the results correlated with clinical pulmonary function studies.
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Affiliation(s)
- Thomas H Shaffer
- Department of Physiology, Temple University School of Medicine, Philadelphia, PA 19104, USA.
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Mulreany LT, Weiner DJ, McDonough JM, Panitch HB, Allen JL. Noninvasive measurement of the tension-time index in children with neuromuscular disease. J Appl Physiol (1985) 2003; 95:931-7. [PMID: 12909595 DOI: 10.1152/japplphysiol.01087.2002] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Respiratory muscle weakness is common in children with neuromuscular disease (NMD). We hypothesized that weakness puts them at risk for respiratory muscle fatigue, a harbinger of chronic respiratory failure. We therefore measured a noninvasive index of respiratory muscle fatigue, the tension-time index of the respiratory muscles (TT(mus)), in 11 children with NMD and 13 control subjects. Spirometric flow rates and maximal inspiratory pressure were significantly lower in the NMD group than in controls (43 +/- 23 vs. 99 +/- 21 cmH2O, P < 0.001). The mean TT(mus) was significantly higher in the NMD group than in controls (0.205 +/- 0.117 vs. 0.054 +/- 0.021, P < 0.001). The increase in TT(mus) was primarily due to an increase in the ratio of average mean inspiratory pressure to maximal inspiratory pressure, indicating decreased respiratory muscle strength reserve. We found a significant correlation between TT(mus) and the residual volume-to-total lung capacity ratio (r = 0.504, P = 0.03) and a negative correlation between TT(mus) and forced expiratory volume in 1 s (r = -0.704, P < 0.001). In conclusion, children with NMD are prone to respiratory muscle fatigue. TT(mus) may be useful in assessing tolerance during weaning from mechanical ventilation, identifying impending respiratory failure, and aiding in the decision to institute therapies.
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Affiliation(s)
- Laura T Mulreany
- Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
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Allen J, Zwerdling R, Ehrenkranz R, Gaultier C, Geggel R, Greenough A, Kleinman R, Klijanowicz A, Martinez F, Ozdemir A, Panitch HB, Nickerson B, Stein MT, Tomezsko J, Van Der Anker J. Statement on the care of the child with chronic lung disease of infancy and childhood. Am J Respir Crit Care Med 2003; 168:356-96. [PMID: 12888611 DOI: 10.1164/rccm.168.3.356] [Citation(s) in RCA: 195] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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