Abstract:
:The tidal flow volume (TFV) loop ratios of (1) time to peak flow (tPTEF) to total expiratory time (tE) [tPTEF/tE] and (2) volume to peak flow (VPTEF) to expired volume (VE) [VPTEF/VE] are reported to decrease with age in early life, and to decrease in subjects with obstructive airways disease (OAD). However, the mechanisms behind these changes are not well known. Thus, we reanalyzed data from 24 healthy neonates (mean birthweight: 3.49 kg +/- 0.42 kg (SD)), 26 presently asymptomatic asthmatic children (age: 33 +/- 21 months), and 26 controls (age: 34 +/- 19 months) to elucidate what is responsible for the changes in these ratios in health and disease. Lung function was measured by TFV loops (SensorMedics 2600) at 1 hour of life and on the following day in the neonates, and before and after inhaled nebulized salbutamol (0.05 mg/kg) in the asthmatics and their controls. The observed decreases in mean tPTEF/tE and VPTEF/VE from 1 hour to 1 day of life (neonates) were entirely due to increased tE and VE, respectively secondary to a decrease in respiratory rate (P = 0.03). In asthmatics (young children), the decreased baseline tPTEF/tE and VPTEF/VE were due to lower tPTEF and VPTEF, with no significant differences in tE and VE in asthmatics and controls. The improved ratios in asthmatic children following inhalation of a bronchodilator were mainly due to increased tPTEF and VPTEF. Our observations point out the importance of evaluating both tPTEF and either tPTEF/tE or VPTEF/VE when attempting to differentiate between changes in ratios that are related to age versus changes that reflect underlying obstructive airways disease.
journal_name
Pediatr Pulmonoljournal_title
Pediatric pulmonologyauthors
Lødrup Carlsen KC,Stenzler A,Carlsen KHdoi
10.1002/(sici)1099-0496(199712)24:6<391::aid-ppul3subject
Has Abstractpub_date
1997-12-01 00:00:00pages
391-6issue
6eissn
8755-6863issn
1099-0496pii
10.1002/(SICI)1099-0496(199712)24:6<391::AID-PPUL3journal_volume
24pub_type
杂志文章abstract::Impulse oscillometry (IOS) evaluates non-effort-dependent respiratory mechanics, and thus it may be useful to evaluate patients with Duchenne muscular dystrophy (DMD). OBJECTIVES:We aimed (1) to describe the behavior of IOS parameters in patients with DMD, and compare it to those from a control group; (2) to determin...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23434
更新日期:2016-10-01 00:00:00
abstract::Asynchronous or paradoxic motion between the rib cage and abdomen may be seen in infants with lung disease. We have recently shown that after bronchodilator administration, the degree of asynchrony decreases proportionately to the improvement in lung mechanics. However, whether such thoraco-abdominal asynchrony (TAA) ...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950110107
更新日期:1991-01-01 00:00:00
abstract::Deficiency of mannose-binding lectin has been shown to be a risk factor for cystic fibrosis (CF) patients. We, therefore, decided to treat a patient with CF, mannose-binding lectin deficiency, severe bronchopulmonary Pseudomonas aeruginosa infection, and rapid deterioration of lung function with purified mannose-bindi...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.10064
更新日期:2002-03-01 00:00:00
abstract:OBJECTIVES:Sildenafil, tezosentan, and prostacyclin reduce pulmonary vascular pressures in pulmonary hypertension, but have potential to vasodilate the systemic circulation. Nebulized vasodilators allow targeted drug delivery, high local drug concentrations, less systemic hypotension, and better matching of the lung's ...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20431
更新日期:2006-07-01 00:00:00
abstract::Phrenic nerve paralysis is a condition typically occurring after invasive procedures in the chest and neck. Here we describe a case of transient unilateral diaphragmatic paralysis in a child with status asthmaticus complicated by complete right lung atelectasis. Common causes of this disorder and possible implications...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20040
更新日期:2004-09-01 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::Two hundred twenty-six healthy school children, with a mean age of 8.8 years; 62 girls mean age 8.8, 48 boys mean age 12.6 and 51 girls mean age 12.6 years at the start, were enrolled in a longitudinal study of lung function and tested annually for 5 years. All were free of respiratory symptoms, and none smoked more t...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950080308
更新日期:1990-01-01 00:00:00
abstract::The prognosis for patients with acute respiratory distress syndrome (ARDS) in adults and children has improved since its formal acceptance as a clinical entity in 1967. Because acute hypoxemic respiratory failure is the hallmark of acute lung injury and ARDS, the management of oxygenation is crucial. Physicians managi...
journal_title:Pediatric pulmonology
pub_type: 杂志文章,评审
doi:10.1002/ppul.1159
更新日期:2001-12-01 00:00:00
abstract::Pediatric Pulmonology continues to publish research and clinical topics related to the entire range of children's respiratory disorders. As we have done annually in recent years, we here summarize some of the past year's publications in our major topic areas, as well as selected literature in these areas from other co...
journal_title:Pediatric pulmonology
pub_type: 杂志文章,评审
doi:10.1002/ppul.23719
更新日期:2017-09-01 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::Impaired respiratory function has been found frequently in ex-premature children, but it is unclear which specific factors influence this impairment the most. The aim of this study was to determine the importance of the contributions of birth weight, gestational age, neonatal respiratory disease, and its treatment on ...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/1099-0496(200007)30:1<32::aid-ppul6>3.0.co
更新日期:2000-07-01 00:00:00
abstract:BACKGROUND:Neurally adjusted ventilatory assist (NAVA) is a ventilation mode which provides respiratory support proportional to the electrical activity of the diaphragm (Edi). The aims of this trial were to assess the feasibility of aiming at peak Edi between 5 and 15 µV during NAVA in clinical practice, to study the e...
journal_title:Pediatric pulmonology
pub_type: 杂志文章,随机对照试验
doi:10.1002/ppul.23084
更新日期:2015-09-01 00:00:00
abstract:BACKGROUND:The aim of this study was to investigate the association among a validated symptom-based questionnaire for asthma control in children (CAN), forced expiratory volume in 1 sec (FEV(1)), and fractional exhaled nitric oxide (FE(NO)). METHODS:Observational cross-sectional study was performed in a consecutive sa...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.21144
更新日期:2010-05-01 00:00:00
abstract:AIM:Our aim was to evaluate the correlation of Adenosine monophosphate challenge test (AMP-PCW) results with the patients' subsequent clinical course. METHODS:We performed a 6-year retrospective cohort study of young children with suspected asthma who underwent AMP-PCW test. RESULTS:Fifty four children were included ...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24337
更新日期:2019-07-01 00:00:00
abstract::Systemic onset juvenile rheumatoid arthritis is the most common rheumatologic disorder of childhood. Pleuropulmonary manifestations are rare in children in this multiorgan disease, and are usually not severe. The diagnosis of systemic onset juvenile rheumatoid arthritis is made by exclusion, in the presence of clinica...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20107
更新日期:2004-12-01 00:00:00
abstract::Inhaled corticosteroids are commonly used in cystic fibrosis (CF), but there are few studies evaluating their safety in young children. We, therefore, prospectively administered beclomethasone diproprionate (BDP) to 12 clinically stable young children with CF to examine the safety of this therapy with respect to adren...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1122
更新日期:2001-10-01 00:00:00
abstract::Five children with positive serology for human immunodeficiency virus (HIV) infection by enzyme-linked immunosorbent assay and Western blot were followed for chronic pulmonary disease. Lung biopsies were performed in all patients, and confirmed the diagnosis of pulmonary lymphoid hyperplasia. All children demonstrated...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950040105
更新日期:1988-01-01 00:00:00
abstract::Exposure to chronic constant or intermittent hypoxia (CCH or CIH) may have different effects on growth and development in early life. In this work, we exposed postnatal day 2 (P2) CD1 mice to CCH or CIH (11% O2) for 4 weeks and examined the effect of hypoxia on body and organ growth until P30. Regression analysis show...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20729
更新日期:2008-01-01 00:00:00
abstract::Neutrophil elastase is present at high levels in airway fluid of patients with cystic fibrosis (CF), and is responsible for considerable inflammatory damage. Human monocyte/neutrophil elastase inhibitor (MNEI), a 42-kDa serpin protein, is an effective inhibitor of neutrophil elastase, cathepsin G, and proteinase-3, re...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.20167
更新日期:2005-02-01 00:00:00
abstract::Background The prevalence of respiratory-technology dependent children is increasing although for most children the goal is liberation from technology. Liberation from home mechanical ventilation (HMV) and decannulation strategies vary due to the lack of clinical practice standards. The primary objective of this study...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24164
更新日期:2018-11-01 00:00:00
abstract::We evaluated 4 patients who developed severe, symptomatic stridor during maximal cardiopulmonary exercise testing, all referred due to exercise-related dyspnea. All underwent resting, unsedated transnasal fiberoptic laryngoscopy and had normal findings. Four patients performed repeat maximal exercise testing with fibe...
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
abstract::The assessment of apnea and asynchronous breathing requires the application of a facemask connected to a pneumotachograph and inductive transducer bands placed around the chest wall. These contact devices may alter the breathing pattern and are difficult to implement, especially in infants and children. This study val...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.21570
更新日期:2012-05-01 00:00:00
abstract::The reliability and predictive value of salivary theophylline levels was investigated in 58 children who were treated with oral sustained-release theophylline preparations for bronchial asthma. Serum and saliva levels were assessed by fluorescence polarization immunoassay (FPIA), and Seralyzer (reagent strip reflectan...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950060407
更新日期:1989-01-01 00:00:00
abstract:OBJECTIVES:A pilot study to compare pulmonary mechanics in a neonatal intensive care unit (NICU) cohort, specifically, comparing lung elastance between male and female infants in the NICU. HYPOTHESIS:Anecdotally, male infants are harder to ventilate than females. We hypothesize that males have higher model-based elast...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24538
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Accelerated lung function decline in cystic fibrosis (CF) is associated with mucoid Pseudomonas aeruginosa infection. Recent data suggest that mucoid P. aeruginosa may amenable to elimination from the airway. We aim to determine whether the initiation of an aggressive antibiotic eradication regimen upon init...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.22543
更新日期:2012-11-01 00:00:00
abstract::Congenital pulmonary venous stenosis (CPVS) has been previously described in older infants and children, typically manifesting as failure to thrive with congestive heart failure and subsequent respiratory deterioration. We report on 2 cases of CPVS which presented during the immediate newborn period as severe persiste...
journal_title:Pediatric pulmonology
pub_type: 杂志文章,评审
doi:10.1002/(sici)1099-0496(199910)28:4<301::aid-ppul1
更新日期:1999-10-01 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::Failure to recognize esophageal intubation can result in severe hypoxia and permanent neurologic injury. Capnography is a standard monitoring modality in the operating room but has not been utilized fully in other environments. We used capnography at the time of endotracheal intubation in the neonatal intensive care u...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.1950190504
更新日期:1995-05-01 00:00:00
abstract:OBJECTIVES:Our therapeutic approach to a habit/tic cough is simple reassurance in a single consultation. To quality assure our practice, we followed up children to determine outcomes at least 3 months after diagnosis. DESIGN:Consecutive children diagnosed over 6 years were studied. Medical records were analyzed retros...
journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.23948
更新日期:2018-04-01 00:00:00
abstract::Our aim was to evaluate long-term effects of exogenous surfactant therapy on pulmonary functional outcome in children born very preterm. We examined 40 children aged 7-12 years who were born before 30 weeks of gestation with an immature surfactant system, and were randomized to one of three treatment groups: human sur...
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(199803)25:3<182::aid-ppul8
更新日期:1998-03-01 00:00:00