Cystic Fibrosis in Children

This study capitalizes on the emerging technology of 19F MRI, using conventional 'thermally' polarized perfluorinated gas (perfluoropropane, or PFP) mixed with oxygen and studied with magnetic resonance imaging (MRI) to visualize ventilation. This technique has not been studied in children. Children and adolescents (6-17 years old) with cystic fibrosis (CF) who have normal spirometry will undergo 19F MRI with the inhalation of an inert contrast gas to study ventilation. Comparisons will be made to a cohort of healthy children (6-17 years old) who will perform the same measures. The primary outcome measure is the feasibility of conducting these studies in the pediatric population. Parallel performance of multiple breath nitrogen washout (MBW) and spirometry will be used to compare the sensitivity of these outcomes to the presence of mild lung disease in these children. Finally, the investigators will compare data obtained during standard breath holds with a novel "free-breathing" technique that will eliminate the need for breath holds during MRI acquisition.

This is a prospective, observational study examining the impact of highly effective cystic fibrosis transmembrane conductance regulator (CFTR) modulators on chronic rhinosinusitis (CRS) and olfactory dysfunction (OD) in young children with cystic fibrosis (YCwCF). This study involves two groups: children 2-8 years old, inclusive at initial visit, receiving highly effective modulator therapy (HEMT), and a control group of children 2-8 years old, inclusive at initial visit, not receiving HEMT. Outcomes will include sinus magnetic resonance imaging (MRI) scans, olfactory tests, and quality of life surveys obtained over a two-year period.

It is aimed to reveal impairments regarding urinary incontinence, dyspnea, muscle strength, functional capacity or quality of life in children and adolescents with cystic fibrosis compared to healthy children and adolescents.

The purpose of this study is to evaluate the prevalence of gastroesophageal reflux disease (GERD) symptoms in pediatric patients with cystic fibrosis using the Gastroesophageal Symptom Assessment Scale (GSAS) and the impact of stopping anti-GERD therapy on the GERD symptoms reported.

The goal of the clinical trial is to test whether a mental health program that is delivered through the Internet works well for children and adolescents with cystic fibrosis (CF) and their healthy siblings. The main questions it aims to answer are: * Does the program improve the mental health such as depression and anxiety symptoms? * Does the program improve overall quality of life? * Does the program improve self-efficacy - an individual's belief in their ability to complete tasks to achieve their goals? Participants will: * Fill out an online survey asking questions about their personal and health information, as well as their mental health before the program * Complete the online mental health program * Fill out an online survey asking questions about their mental health after completing the program, and 1-month and 3-months following completing the program Participants be compared against another group of children with CF and their healthy siblings who are on a waitlist and receiving usual CF treatment. Researchers will compare participants scores before starting the program with their scores immediately following completing the program, 1-month, and 3-month after completing the program. Researchers hope to develop a program that improves mental health, quality of life, self-efficacy, and knowledge about CF.

Cystic fibrosis (CF) is a disease characterized by chronic airway infection and impaired mucociliary clearance, which predisposes those affected to recurrent pulmonary exacerbations (PEx) and progressive decline in lung function. Treatment with elexacaftor/tezacaftor/ivacaftor (ETI) results in decreases in patient-reported cough and PEx. Despite this, increased cough remains the most common symptom associated with acute PEx and worsening lung disease. Cough frequency was historically difficult to measure due to reliance on human input. Recent advances in audio capture and signal processing have made automated cough detection possible. As a result there's been a surge in development of portable cough monitors, as cough is increasingly recognized as a measurable parameter of respiratory disease. The majority of cough monitors have been designed for use in adults, and little is known about the practicality of collecting cough data in the pediatric population. In this study investigators aim to assess the feasibility of using an in-home device to capture nighttime cough frequency in children with and without CF. Investigators plan to compare nighttime cough frequency between children with and without CF and, among children with CF, and determine the association between cough frequency and baseline lung function. Additionally, investigators aim to evaluate the changes in nighttime cough frequency in relationship to respiratory symptom scores surrounding clinician diagnosed pulmonary exacerbations. This study will provide important preliminary data needed for a larger study assessing the utility of home cough monitoring for clinical care and for use of cough as a clinical outcome measure in research studies.

The aim of the present study is to investigate the effect of probiotic supplementation on GI related quality of life, through a randomised placebo-controlled clinical trial. Moreover, the invetigators wish to study CF microbiota and intestinal inflammation in the setting of probiotic supplementation and newly started treatment with a highly effective CF-specific treatment, elexacaftor-tezacaftor-ivacaftor (ETI). The proposed project has the potential to increase QoL and decrease GI morbidity in children with CF. If successful, the results of this study can contribute to alter the care of CF patients by including supplementation of probiotics in routine CF care. Morever, the study can provide much needed insights to GI microbiota and inflammation in pediatric CF patients.

Goal is to physiologically detect unsuspected small airways obstruction in children and adults with treated heterozygous and homozygous cystic fibrosis. Unsuspected refers to normal routine pre bronchodilator spirometry including normal FEV1(L), FVC (L). and FEV1/FVC%. This is a retrospective study.