Abstract:
:While the use of the raised volume rapid thoraco-abdominal compression (RVRTC) technique has been shown to provide new insights into airway and pulmonary pathophysiology in infants, and appears to resemble the spirometric techniques used in older subjects, there is as yet no consensus regarding measurement procedures, which are known to vary considerably between laboratories (Gappa [1999] Pediatr Pulmonol 28:391-393). The aims of this study were to assess the effects of tightness of jacket fit, the efficiency with which pressure is transmitted from the jacket to the intrathoracic airways, and the effect of jacket pressure on parameters derived from the RVRTC technique. Paired forced expiratory maneuvers were performed in 20 infants with the jacket snugly or loosely wrapped around the infant's torso, and in a further 21 infants using "optimal" or a higher jacket pressure (P(j)) (1-2 kPa above "optimal" P(j)). When either a loosened jacket or a higher than "optimal" P(j) was used, forced expired flow at low lung volumes (FEF(75)) was significantly reduced by, on average, 8% and 7%, respectively. There were, however, minimal changes in forced vital capacity (FVC) or forced expired volume in 0.4 sec (FEV(0.4)). The observed changes may have been due to the increased pressure transmitted to the intrathoracic structures under these experimental conditions, and emphasize the need to assess optimal jacket pressure within each infant when using the RVRTC technique. In addition, when using a loosened jacket or a higher than "optimal" P(j), chest wall and upper airway reflexes such as glottic closure, peripheral airway closure, and negative flow dependence were more evident.
journal_name
Pediatr Pulmonoljournal_title
Pediatric pulmonologyauthors
Lum S,Hoo AF,Stocks Jdoi
10.1002/ppul.10170subject
Has Abstractpub_date
2002-11-01 00:00:00pages
361-8issue
5eissn
8755-6863issn
1099-0496journal_volume
34pub_type
杂志文章abstract::The main physiological impact of high flow nasal cannula (HFNC) therapy is presumed to be a decrease in work of breathing (WOB). To assess this, diaphragmatic electrical activity and esophageal pressure changes were measured off then on HFNC delivered at 2 L/kg/min, in 14 infants with bronchiolitis and 14 cardiac infa...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
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更新日期:2015-07-01 00:00:00
abstract:RATIONALE:Whether asthma constitutes a risk factor for coronavirus disease-2019 (COVID-19) is unclear. Here, we aimed to assess whether asthma, the most common chronic disease in children, is associated with higher COVID-19 risk or severity in pediatric populations. METHODS:We performed a systematic literature search ...
journal_title:Pediatric pulmonology
pub_type: 杂志文章,meta分析
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23568
更新日期:2017-03-01 00:00:00
abstract::Extralobar pulmonary sequestration is a congenital lung malformation characterized by a non-functional lung segment with systemic feeding vessel. Over 90% of sequestrations are found in the thorax with less than 10% located in the abdomen. We present an unusual case of intra abdominal pulmonary sequestration, located ...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.22891
更新日期:2014-05-01 00:00:00
abstract:INTRODUCTION:In cystic fibrosis (CF) patients, respiratory syncytial virus (RSV) infection is associated with significant morbidity. Although passive prophylaxis with palivizumab lowers hospitalization rate for RSV infection in populations at risk of severe infection, its use is not recommended in infants with CF disea...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1002/ppul.1950010605
更新日期:1985-11-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24354
更新日期:2019-08-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章,评审
doi:10.1002/ppul.20790
更新日期:2008-04-01 00:00:00
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journal_title:Pediatric pulmonology
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24591
更新日期:2020-02-01 00:00:00
abstract::Three adults with cystic fibrosis (one after lung transplantation) presented with fever, chest pain, and acute radiographic changes. The changes included a cavitary lesion of the lung, acute dense infiltrates, and lobar collapse. After failing conventional antibiotic therapy, the patients underwent flexible bronchosco...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20348
更新日期:2006-02-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23025
更新日期:2015-02-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.25016
更新日期:2020-11-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950150604
更新日期:1993-06-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20076
更新日期:2005-01-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950080403
更新日期:1990-01-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章,评审
doi:10.1002/ppul.23930
更新日期:2018-02-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20948
更新日期:2009-02-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23538
更新日期:2017-03-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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更新日期:2015-12-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.21391
更新日期:2011-07-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.21216
更新日期:2010-06-01 00:00:00
abstract::Exercise-induced asthma (EIA) is a possible cause of poor physical performance in children. No data are available on the value of respiratory symptoms to discriminate children with bad physical fitness from children with EIA. We evaluated respiratory symptoms in school-age children during and after exercise in relatio...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20185
更新日期:2005-04-01 00:00:00
abstract:BACKGROUND:Variation of lung function is considered to be a hallmark of asthma. Although guidelines recommend measuring it as a diagnostic tool for asthma, the usefulness of this approach has not been studied in children. AIM:To assess the usefulness of home spirometry in children with nonspecific lower respiratory tr...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.21183
更新日期:2010-04-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.10201
更新日期:2003-01-01 00:00:00
abstract::Necrotizing sarcoid granulomatosis (NSG) is characterized by pulmonary nodular infiltrates, a typical histology, and a benign clinical course. The etiology and pathogenesis of the disease are still unknown. In childhood, it is extremely rare, with only three reported cases so far. Here we report on an 8-year-old girl,...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.10242
更新日期:2003-05-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20492
更新日期:2006-11-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.22705
更新日期:2013-06-01 00:00:00
abstract::The optimal duration of therapy for acute exacerbations of cystic fibrosis (CF) has not been defined, and the utility of serial pulmonary function testing in predicting the duration of therapy has yet to be established. In a review of 90 pulmonary exacerbations of 39 patients with CF requiring hospitalization, we foun...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950160404
更新日期:1993-10-01 00:00:00