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Objective: Children with medical complexity (CMC) are a growing population, yet training in complex care varies across pediatric residency programs. The purpose of this study was 1) to evaluate the effectiveness of a curriculum for pediatric residents in improving performance in a simulated clinical scenario, and 2) to explore residents' perceived self-efficacy in caring for CMC., Methods: A randomized controlled trial was conducted supplemented by qualitative inquiry. Pediatric residents from 2 residency programs were randomly assigned to participate in interactive modules on: 1) clinical assessment, care planning, and technological dependency or 2) noncomplex care topics. The primary outcome was mean score on an Observed Structured Clinical Examination (OSCE) of tracheostomy care. Semistructured interviews were conducted postintervention and analyzed using qualitative content analysis., Results: Ninety-four eligible residents were randomized. Residents who attended all modules and the OSCE and consented to participate (intervention [n = 20] and control [n=24]) were included in the final analysis. At baseline, few (9%) reported being comfortable caring for CMC. There was no significant difference in mean OSCE score between intervention and control groups (39.0 ± 1.1 vs 38.0 ± 1.0, P = .48). Qualitative analysis revealed 3 emerging themes related to resident self-efficacy: building a system of care, navigating uncertainty, and professional identity formation., Conclusions: A standardized complex care curriculum delivered in a classroom setting did not lead to improved performance in an OSCE station despite increased resident-reported self-efficacy in approaching care for CMC. These findings highlight the need for multidimensional educational interventions and assessments in complex care., (Copyright © 2019 Academic Pediatric Association. Published by Elsevier Inc. All rights reserved.)

The start of a parenting journey in the neonatal intensive care unit (NICU) presents many stressors to parents. Previous research has shown parents of infants admitted to the NICU experience heightened stress, anxiety, and depression. Mental health support varies across Canadian NICUs with mixed results. One promising intervention that has not been explored in the NICU is Acceptance and Commitment Therapy (ACT), a behavioural therapy that has had positive mental health-related outcomes in similar parental populations. ACT differs from previous mental health interventions such as traditional Cognitive Behavioural Therapy (CBT) as it involves mindfulness and acceptance to increase psychological flexibility. Increased psychological flexibility is linked to greater emotional well-being, a higher quality of life, and decreased stress, anxiety, and depression. There is a need for research investigating the utility of ACT in improving mental health outcomes for parents of preterm infants., (© The Author(s) 2020. Published by Oxford University Press on behalf of the Canadian Paediatric Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)

Background: Proteolysis of matrix components, in particular elastin, is a major contributing factor to the development of lung diseases such as emphysema and chronic obstructive pulmonary disease (COPD). MMP-12 (macrophage elastase) is a protease known to be involved in the progression of lung disease. The relatively low abundance of MMP-12 has precluded the development of quantitative assays that can accurately measure MMP-12 protein levels and activity across cohorts of healthy and diseased individuals., Methods: Commercial antibodies were screened for performance in sandwich ELISA and capture FRET activity assay formats. Precision, accuracy, sensitivity, dilution linearity, and spike recovery were evaluated using sputum samples., Results: Total protein and capture FRET activity assays were developed that were sensitive enough to detect MMP-12 in 37 of 38 donor sputum samples. A comparison of results between the two assays shows that a majority of sputum MMP-12 is in the active form. No differences were seen between normal, asthmatic, and COPD donors., Conclusion: Sensitive and quantitative assays for both MMP-12 activity and total protein in human induced sputum have been developed. These assays can be used to evaluate MMP-12 as a biomarker for lung disease, and to monitor efficacy of potential therapeutic compounds.

Objective: Pulmonary vein isolation is curative in selected patients with atrial fibrillation. The objective of this study was to assess the feasibility and safety (midterm results) of video-assisted thoracoscopic epicardial pulmonary vein isolation., Methods: Twenty-seven patients (22 male patients) with atrial fibrillation (18 paroxysmal, 4 persistent, and 5 permanent; average age, 57 years) underwent bilateral video-assisted thoracoscopic off-pump epicardial pulmonary vein isolation and exclusion of the left atrial appendage. All patients had had unsuccessful drug therapy or were intolerant to antiarrhythmic drug therapy or were intolerant to warfarin. The approach included two 10-mm ports and one 5-cm working port (non-rib spreading) bilaterally. Pulmonary vein isolation was achieved bilaterally by using a bipolar radiofrequency device. The left atrial appendage was excised with a surgical stapler., Results: Bilateral pulmonary vein isolation and left atrial appendage excision was performed successfully in all patients. There were no conversions to sternotomy or thoracotomy. All patients were extubated in the operating room. Postoperative complications in 3 patients were minor and resolved within 48 hours. One morbidly obese patient had more serious complications related to comorbid conditions. Average postoperative follow-up is approximately 6 months (173.6 days). Twenty-three patients have been followed up for greater than 3 months, and 21 of these patients are free of atrial fibrillation (91.3%). The results of magnetic resonance angiography were normal (no pulmonary vein stenosis) in 12 of 12 patients evaluated 3 to 6 months postoperatively., Conclusions: Bilateral video-assisted thoracoscopic pulmonary vein isolation with excision of the left atrial appendage is feasible and safe and offers a promising, new, minimally invasive, beating-heart approach for curative surgical treatment of atrial fibrillation.