Abstract:
:The quantity and composition of airway surface liquid (ASL) are essential to host defense. To date, attempts to harvest ASL and measure its composition have yielded conflicting results. We investigated the physical principles underlying two techniques that were proposed for harvesting ASL: filter paper pledgets and polyethylene catheters. We compared the force and pressure generation and the kinematics of capillarity-induced fluid uptake with both techniques. Both have significant limitations for harvesting ASL, generating physiologically significant pressures (filter paper, 60.4 Pa; polyethylene, 14.3 Pa) that could potentially compromise epithelial integrity. Furthermore, filter paper generates a force 85-fold higher than the polyethylene catheter, which is associated with a very high rate of uptake of liquid and a large total amount of liquid relative to ASL thickness. While the PE catheter harvests liquid more gently, it is only effective when ASL surface tension is below 31 mN/m. These limitations likely account for some of the variability in reported ASL composition, and highlight the need for improved methods for harvesting ASL.
journal_name
Pediatr Pulmonoljournal_title
Pediatric pulmonologyauthors
Landry JS,Landry C,Cowley EA,Govindaraju K,Eidelman DHdoi
10.1002/ppul.10409subject
Has Abstractpub_date
2004-02-01 00:00:00pages
149-57issue
2eissn
8755-6863issn
1099-0496journal_volume
37pub_type
杂志文章abstract:OBJECTIVE:To evaluate the contents of parent-created emergency tracheostomy kits and identify deficiencies. METHODS:This was an observational study. Data on emergency tracheostomy kits were abstracted for 30 consecutive children who had a tracheostomy tube in situ during an outpatient clinic visit with the Division of...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23740
更新日期:2017-12-01 00:00:00
abstract:OBJECTIVES:We assessed the performance of a tracheostomy decannulation protocol privileging safety over quickness, in pediatric patients undergoing rehabilitation from severe acquired brain injury. We analyzed factors associated with decannulation timing and possibility and examined cases of failure. HYPOTHESIS:A safe...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23832
更新日期:2017-11-01 00:00:00
abstract::Central ventilation disorders(1) and airway obstruction(2) with chronic hypoxemia are causally related to cor pulmonale. Pulmonary vascular resistance is often reversible, and hypoxic pulmonary hypertension often responds to treatment with supplemental oxygen. Oxygen therapy during sleep may be useful as a temporary p...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1037
更新日期:2001-03-01 00:00:00
abstract::Nicotine, 1 mg/kg body weight/day, was injected subcutaneously in 3 female rabbits during gestational and lactating periods, and the lungs of the offspring were studied by scanning and transmission electron microscopy (SEM and TEM) on days 5, 10, and 25 postpartum. Three other female rabbits served as controls. The si...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950010606
更新日期:1985-11-01 00:00:00
abstract:OBJECTIVE:Methicillin-resistant Staphylococcus aureus (MRSA) infections in cystic fibrosis (CF) patients have greatly increased in prevalence in the past two decades and may lead to a more rapid rate of lung function decline. The objective of this study was to determine the impact of a MRSA eradication protocol on long...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24628
更新日期:2020-03-01 00:00:00
abstract::We have evaluated the role of eosinophil cationic protein (ECP) concentrations in serum in predicting wheezing after bronchiolitis, during infancy and early childhood. A prospective study at a university hospital serving all pediatric patients in a defined area was designed. Serum ECP concentrations were measured in 9...
journal_title:Pediatric pulmonology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1002/(sici)1099-0496(199706)23:6<397::aid-ppul1
更新日期:1997-06-01 00:00:00
abstract:BACKGROUND:Improper use of asthma inhalers is one of the potential factors of poor asthma control among children. This study aimed to assess the proper handling of asthma inhalers and asthma control in addition to factors influencing them among pediatric patients who self-administer their inhalers. METHODS:A cross-sec...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.25263
更新日期:2021-01-26 00:00:00
abstract:OBJECTIVE:To examine cystic fibrosis (CF) physician adherence to the 2007 CF Foundation (CFF) Pulmonary Guidelines for Chronic Medications. Specifically adherence and barriers to prescribing level A medication recommendations (i.e., inhaled tobramycin and dornase alfa) and level B medication recommendations (i.e., macr...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.21573
更新日期:2012-05-01 00:00:00
abstract:BACKGROUND:In preschool children, measurement of airway resistance using interrupter technique (Rint) is feasible to assess the degree of bronchial obstruction. Although some studies measured Rint in infancy, values of Rint and its variability in preterm infants are unknown. In this study, Rint and its variability was ...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23771
更新日期:2017-10-01 00:00:00
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
doi:10.1002/ppul.23060
更新日期:2015-07-01 00:00:00
abstract:INTRODUCTION:Interpregnancy interval (IPI) is defined as the period between a live birth and the conception of a subsequent fetus. Both short (IPI < 6 months) and long IPI (IPI > 60 months) have been shown to increase the risk for adverse perinatal outcomes, some of which, are known risk factors for obstructive sleep a...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.25240
更新日期:2020-12-31 00:00:00
abstract::Fetal lung hypoplasia is a common finding in several fetal conditions such as congenital diaphragmatic hernia (CDH). Interestingly, previous studies have demonstrated that hypoplastic lungs have the ability to recover to normal size, when relieved from mechanical factors. However, the underlying mechanisms remain larg...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20840
更新日期:2008-07-01 00:00:00
abstract::Pulmonary infection with Staphylococcus aureus occurs in young children with cystic fibrosis, and may contribute to the cycle of infection, inflammation, and destruction of lung tissue which leads to bronchiectasis. Practice guidelines in North America and the UK differ greatly with regard to the advice given on presc...
journal_title:Pediatric pulmonology
pub_type: 杂志文章,评审
doi:10.1002/ppul.20305
更新日期:2005-12-01 00:00:00
abstract::Intrauterine inflammation generates inflammatory mediators that damage the developing bronchoalveolar epithelium, resulting in neonatal lung injury. Lung fluid transport disorders are the main reasons for the development of pulmonary edema, an important pathology of lung injury. Previous studies suggested that epithel...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24242
更新日期:2019-03-01 00:00:00
abstract::Eight patients with cystic fibrosis [CF] colonized with Pseudomonas aeruginosa (P. aeruginosa) had serial lung function, peripheral blood inflammatory markers, and serum IgG antibodies to Burkholderia cepacia (B. cepacia) lipopolysaccharide measured in the months preceding and following colonisation with B. cepacia. O...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/(sici)1099-0496(200001)29:1<8::aid-ppul2>3
更新日期:2000-01-01 00:00:00
abstract::Respiratory syncytial virus (RSV) lower respiratory tract infection (LRTI) during early childhood may be associated with subsequent pulmonary sequelae, including recurrent wheezing and asthma. We undertook a systematic review to investigate the pulmonary function sequelae following RSV LRTI in the first 3 years of lif...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24804
更新日期:2020-07-01 00:00:00
abstract:UNLABELLED:SUMMARY RATIONALE: Asthma therapy should be stepped up or stepped down in response to changes in asthma control. However, there is little evidence available on the optimal timing, sequence, and degree of medication reductions. In this study we analyzed clinically stable asthmatic children who underwent a med...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.21278
更新日期:2010-09-01 00:00:00
abstract:BACKGROUND:Population-based studies investigating health-related quality of life (HRQoL) among asthmatic adolescents are rare. Further, among subjects with asthma, HRQoL may be affected by asthma control and severity. AIM:To investigate HRQoL in relation to asthma control and asthma severity among adolescents. METHOD...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23723
更新日期:2017-07-01 00:00:00
abstract::The objective of this study was to determine the neurodevelopmental and temperamental outcome of infants who suffered an idiopathic apparent life-threatening event (IALTE) and their mothers' perceptions of such an event, and to compare such infants with a matched group of babies hospitalized for nonthreatening events....
journal_title:Pediatric pulmonology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1002/(sici)1099-0496(199907)28:1<47::aid-ppul8>
更新日期:1999-07-01 00:00:00
abstract::Our objective was to compare the effectiveness of maximum forced expiratory flow measured at functional residual capacity (V'maxFRC) and the ratio of flow at 75% of the forced expiratory volume to peak forced expiratory flow (FEF(75)/FEF(peak)) for detecting bronchodilator-related changes in wheezy infants. In 55 infa...
journal_title:Pediatric pulmonology
pub_type: 临床试验,杂志文章
doi:10.1002/ppul.10325
更新日期:2003-09-01 00:00:00
abstract:RATIONALE:Increasing evidence suggests the forced oscillation technique (FOT) has the capacity to provide non-invasive monitoring and diagnosis of respiratory disease in young children. However, which FOT outcomes provide the most pertinent clinical information is currently unknown. The aim of this study was to determi...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24286
更新日期:2019-06-01 00:00:00
abstract::Progressive lung disease in patients with cystic fibrosis (CF) is caused by thick secretions, which cause airway obstruction and subsequent colonization and infection by inhaled pathogenic microorganisms. Recently, recombinant human DNase has been shown to reduce the viscoelasticity of sputum in patients with cystic f...
journal_title:Pediatric pulmonology
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1002/(SICI)1099-0496(199602)21:2<77::AID-PPUL3>
更新日期:1996-02-01 00:00:00
abstract:BACKGROUND:Our objective was to determine those characteristics associated with reversibility of airflow obstruction and response to maximal bronchodilation in children with severe asthma through the Severe Asthma Research Program (SARP). METHODS:We performed a cross-sectional analysis evaluating children ages 6 to 17...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24473
更新日期:2019-11-01 00:00:00
abstract::We report the case of a 4-year-old child with an atypical presentation of an aspirated unwitnessed foreign body in the airway. During an attempt to obtain a biopsy of what appeared to be a mucosal growth, the foreign body was removed. This may be the first report of foreign body removal in a child this young, using a ...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950180113
更新日期:1994-07-01 00:00:00
abstract:OBJECTIVE:Respiratory illnesses compose the most common diagnoses of patients admitted to pediatric intensive care units. In pediatrics, high-flow nasal cannula (HFNC) therapy is an intermediate level of respiratory support with variability in practice. We conducted a pre-post intervention study of patients placed on H...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.25214
更新日期:2020-12-09 00:00:00
abstract::Tracheobronchomegaly (Mounier-Kuhn syndrome) is characterized by dilatation of the central airways, tracheobronchial outpouchings, and chronic tracheobronchitis. Most cases are diagnosed in adulthood. We report the clinical, radiographic, and bronchoscopic findings in a 14-year-old boy with tracheobronchomegaly, ptosi...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/(sici)1099-0496(200006)29:6<476::aid-ppul1
更新日期:2000-06-01 00:00:00
abstract::Inadequate intake and suboptimal growth are common problems for patients with CF and a critical target for intervention. The purpose of this study was to compare the growth outcomes of children with CF who participated in a randomized clinical trial to improve energy intake and weight to children with CF receiving sta...
journal_title:Pediatric pulmonology
pub_type: 杂志文章,随机对照试验
doi:10.1002/ppul.21322
更新日期:2011-01-01 00:00:00
abstract::There is a need to judge general exercise tolerance in children with cystic fibrosis (CF) under normal daily activity conditions and -when more extensive testing is required-in an exercise laboratory in a specialized center. We investigated the reproducibility, validity, and criterion for a 6-minute walking test, whic...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/(SICI)1099-0496(199608)22:2<85::AID-PPUL1>
更新日期:1996-08-01 00:00:00
abstract:OBJECTIVE:To determine the interpretative consequences of adopting the Global Lungs 2012 (GLI-2012) spirometric prediction equations in a pediatric hospital population. MATERIAL:Spirometric records from 2,192 white boys and 1,842 white girls, and 412 and 334 African-American boys and girls, respectively, aged 6.0-18.0...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.22876
更新日期:2014-02-01 00:00:00
abstract:BACKGROUND:Cystic fibrosis (CF) genotyping has garnered increased attention since the discovery of the cystic fibrosis transmembrane conductance regulator (CFTR) gene in 1989 led to the identification of over 1700 mutations on chromosome 7. Yet, little is known about the genetic profile of CF patients in Turkey. This s...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24299
更新日期:2019-06-01 00:00:00