A Typology of Transition Readiness for Adolescents with Congenital Heart Disease in Preparation for Transfer from Pediatric to Adult Care.

PURPOSE: To understand the effectiveness of a nurse-led transition intervention by analyzing qualitative data generated in the context of a clinical trial. DESIGN & METHODS: Qualitative study of a two-session transition intervention conducted by registered nurses at two sites. Adolescents aged 16-17 years with moderate or complex congenital heart disease (CHD) had been randomized to a two-session transition intervention or usual care. Session 1 emphasized patient education including creation of a health passport and goal setting. Session 2, two months later, emphasized self-management. Qualitative data extracted from intervention logs, field notes and audio recordings of the sessions were analyzed for content and themes. RESULTS: Data from 111 transition intervention sessions with 57 adolescents were analyzed. Creating a health passport, goal setting, and role-plays were the elements of the intervention most valued by participants. A typology of transition readiness was identified: 1) the independent adolescent (5%), already managing their own care; 2) the ready adolescent who was prepared for transition after completing the intervention (46%); 3) the follow-up needed adolescent who was still in need of extra coaching (26%), and 4) the at-risk adolescent who warranted immediate follow-up (14%). Baseline knowledge and transition surveys scores validated the typology. CONCLUSIONS: A two-session nursing intervention met the transition needs of approximately half of adolescents with CHD. However, additional transition-focused care was needed by 40% of participants (groups 3 and 4). PRACTICE IMPLICATIONS: These findings will guide pediatric nurses and other healthcare professionals to optimize an individualized approach for ensuring transition readiness for adolescents with CHD.

Influenza infects lung microvascular endothelium leading to microvascular leak: role of apoptosis and claudin-5.

Severe influenza infections are complicated by acute lung injury, a syndrome of pulmonary microvascular leak. The pathogenesis of this complication is unclear. We hypothesized that human influenza could directly infect the lung microvascular endothelium, leading to loss of endothelial barrier function. We infected human lung microvascular endothelium with both clinical and laboratory strains of human influenza. Permeability of endothelial monolayers was assessed by spectrofluorimetry and by measurement of the transendothelial electrical resistance. We determined the molecular mechanisms of flu-induced endothelial permeability and developed a mouse model of severe influenza. We found that both clinical and laboratory strains of human influenza can infect and replicate in human pulmonary microvascular endothelium, leading to a marked increase in permeability. This was caused by apoptosis of the lung endothelium, since inhibition of caspases greatly attenuated influenza-induced endothelial leak. Remarkably, replication-deficient virus also caused a significant degree of endothelial permeability, despite displaying no cytotoxic effects to the endothelium. Instead, replication-deficient virus induced degradation of the tight junction protein claudin-5; the adherens junction protein VE-cadherin and the actin cytoskeleton were unaffected. Over-expression of claudin-5 was sufficient to prevent replication-deficient virus-induced permeability. The barrier-protective agent formoterol was able to markedly attenuate flu-induced leak in association with dose-dependent induction of claudin-5. Finally, mice infected with human influenza developed pulmonary edema that was abrogated by parenteral treatment with formoterol. Thus, we describe two distinct mechanisms by which human influenza can induce pulmonary microvascular leak. Our findings have implications for the pathogenesis and treatment of acute lung injury from severe influenza.