Publications by authors named "Mei-Zahav M"

Background: Morbid obesity in adolescents impacts respiratory function, often leading to reduced lung volume and obstructive ventilatory defects. However, standard spirometric values frequently remain within normal ranges.

Objectives: We hypothesized that Lung Clearance Index (LCI) is a more sensitive marker for detecting airway dysfunction in adolescents with morbid obesity than conventional lung function tests.

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Background: People with cystic fibrosis (CF) variants that exhibit residual function (RF) of the CF transmembrane conductance regulator are considered to have a milder disease; however, the spectrum of CF phenotype within the different RF variants has not been extensively investigated. The aim of the present study was to characterise the spectrum of CF disease severity in people with CF (pwCF) carrying different RF variants, using the European Cystic Fibrosis Society Patient Registry (ECFSPR) data.

Methods: A retrospective cross-sectional and longitudinal cohort study included data from the ECFSPR during 2008-2016.

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Aim: Our aim was to examine how fever duration affected the ability of biomarkers to diagnose community-acquired pneumonia (CAP).

Methods: This was a retrospective cohort study of children aged 2-18 years who attended the emergency department at Schneider Children's Medical Centre of Israel with CAP from June 2015 to May 2020. The children underwent biomarker measurements and chest radiographs and optimal biomarker thresholds were identified.

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Background: Quality of life and survival in Cystic Fibrosis (CF) have improved dramatically, making family planning a feasible option. Maternal and perinatal outcomes in women with CF (wwCF) are similar to those seen in the general population. However, the effect of undergoing multiple pregnancies is unknown.

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During the COVID-19 pandemic wearing face masks was mandatory. Nowadays, face masks are still encouraged indoors, especially in hospitals. People climbing stairs with masks describe unpredictable dyspnea.

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Background: Although extremely premature birth disrupts lung development, adolescent survivors of extreme prematurity show good clinical and physiologic outcomes. Cardiopulmonary limitations may not be clinically evident at rest. Data regarding exercise limitation in adolescents following preterm birth in the postsurfactant era are limited.

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Background: Most congenital pulmonary airway malformations (CPAMs) are detected antenatally. The majority of newborns are asymptomatic. Patients are prone to subsequent respiratory complications and to a lesser extent malignant transformation remains concerning.

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Background: Population genetic carrier screening (PGCS) for cystic fibrosis (CF) has been offered to couples in Israel since 1999 and was included in a fully subsidized national program in 2008. We evaluated the impact of PGCS on CF incidence, genetic and clinical features.

Methods: This was a retrospective national study.

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Studies on post-COVID-19 condition (PCC) in adults have shown deterioration in pulmonary function tests (PFTs), mainly a diffusion limitation. Among the pediatric population, data are scarce. To characterize PFTs in children with PCC, including changes over time.

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Article Synopsis
  • * A study analyzed data from 174 CF patients with severe lung impairment (FEV ≤ 40%), finding that lower peak work rate (W) and peak oxygen uptake were significant predictors of death/LTX.
  • * The research revealed that patients with a peak work rate of 49.2% or lower had a much higher risk (45.2%) of death/LTX compared to those above that threshold (10.9%), indicating that W could be crucial for deciding on transplant referrals.
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Background: Lung function deterioration in cystic fibrosis (CF) is typically measured by a decline in the forced expiratory volume in one second (FEV%), which is thought to be a late marker of lung disease. Dynamic hyperinflation (DH) is seen in obstructive lung diseases while exercising. Our aim was to assess whether DH could predict pulmonary deterioration in CF; a secondary measure was the peak VO.

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Article Synopsis
  • The study examines forced expiratory volume (FEV) decline in cystic fibrosis patients using European data from 2008 to 2016, before effective treatments were available.
  • Findings reveal that the fastest declines in FEV occur during puberty, particularly in those diagnosed young, with variations based on mutation type and income level of the country.
  • This research provides a baseline understanding of FEV trends pre-highly effective modulator therapy, highlighting disparities between low-income and higher-income countries.
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Background: The prevalence of nontuberculous mycobacteria (NTM) infections is rising in people with cystic fibrosis (pwCF). NTM infection, especially infection with Mycobacterium abscessus complex (MABC), is commonly associated with severe lung deterioration. The current treatment modalities, including multiple intravenous antibiotics, frequently fail to achieve airway eradication.

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Background: Spinal Muscular Atrophy (SMA) is a severe neuromuscular disorder. Despite increased survival due to novel therapies, morbidity from respiratory complications still persists. We aim to describe these patients' sputum cultures as an expression of chronic infectious airway disease.

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Background: High-flow nasal cannula (HFNC) therapy may be better tolerated than traditional noninvasive ventilation (NIV) and is rapidly gaining acceptance in pediatric acute care. In Israel, HFNC is approved for domestic use. We aim to describe its indications, efficacy, parental satisfaction, and safety.

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Several dry-powder inhalers (DPIs) contain lactose which may be contaminated with milk proteins. Confusion exists pertaining to DPI use in patients with cow's milk protein allergy (CMPA). A computerized survey sent via e-mail to pediatric pulmonologists and allergologists.

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Article Synopsis
  • The study assessed the effectiveness of the drug combination Elexacaftor/Tezacaftor/Ivacaftor (ETI) in patients with cystic fibrosis (CF) who have mutations other than F508del.
  • Results showed significant improvements in sweat chloride levels, reduced pulmonary exacerbations, and fewer days on antibiotics for patients who hadn't previously used CFTR modulators.
  • The findings suggest that ETI is clinically effective for CF patients with non-F508del mutations, supporting its routine use for these individuals.
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Background: Pulmonary disease is the leading cause of morbidity and mortality in people with cystic fibrosis (pwCF). Several studies have shown no benefit for bronchoscopy and bronchoalveolar lavage (BAL) over sputum to obtain microbiological cultures, hence the role of bronchoscopy in pwCF is unclear.

Aim: To analyze how bronchoscopy results affected clinical decision-making in pwCF and assess safety.

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Background: Long-term treatment with inhaled antibiotics is recommended for people with cystic fibrosis (pwCF) chronically infected with Pseudomonas aeruginosa (PA). However, pwCF without chronic PA infection are also commonly treated with inhaled antibiotics. Using data from the European Cystic Fibrosis Patient Registry (ECFSPR) we aimed to determine the prevalence and factors associated with inhaled antibiotic treatment in pwCF without chronic PA infection, and long-term outcomes with inhaled antibiotics use.

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Rational: People with cystic fibrosis carrying residual function (RF) mutations are considered to have a mild disease course. This may influence caregivers and patients on how intensive the treatments should be.

Objectives: Characterize disease severity of patients carrying RF mutations, using the European CF Society Patient Registry (ECFSPR) data.

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Aim: Videofluoroscopy swallow studies (VFSS) are gold standard to diagnose aspiration in children but require resources and radiation compared with clinical feeding evaluation (CFE). We evaluated their added value for diagnosis, feeding management and clinical status.

Methods: A retrospective single-centre cross-sectional study of children aged 0-18 years, with respiratory morbidity, referred for VFSS at a tertiary pediatric hospital.

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Background: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in people with cystic fibrosis (pwCF) can lead to severe outcomes.

Methods: In this observational study, the European Cystic Fibrosis Society Patient Registry collected data on pwCF and SARS-CoV-2 infection to estimate incidence, describe clinical presentation and investigate factors associated with severe outcomes using multivariable analysis.

Results: Up to December 31, 2020, 26 countries reported information on 828 pwCF and SARS-CoV-2 infection.

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Background: Adherence to treatment by adolescents and adults with cystic fibrosis (CF) is often poor.

Objectives: To assess the impact of a focused clinical intervention on adherence in individual patients, including help in problem-solving key barriers to adherence. To implement a patient-centered problem-solving intervention using CF My Way tools.

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