Christiana M. Russ

On the matrix cracking stress and the redistribution of internal stresses in brittle-matrix composites

Abstract A concept is proposed to increase the matrix cracking stress of some brittle-matrix composites by taking advantage of the redistribution of internal stresses that occurs when a composite with phases that have dissimilar creep behavior is subjected to thermomechanical loading. The concept is elaborated through the stress analysis of a model unidirectional composite with constituents that exhibit linear viscoelastic behavior. It is shown that if a composite with a matrix that is less creep resistant than the fibers is subjected to a treatment involving both thermal and mechanical loading (e.g. creep test), stresses can be transferred from the matrix to the fibers, resulting in the stress–relaxation of the matrix. Furthermore, it is also shown that by the elastic recovery of the fibers, the matrix can be subjected to large compressive residual stresses at the end of the treatment. The conditions for the viability of this concept and the implications of fiber overloading and potential loss of composite-like behavior are discussed.

Bidirectional exchange in global health: Moving toward true global health partnership

Although there has been rapid growth in global health educational experiences over the last two decades, the flow of learners remains overwhelmingly one directional; providers from high-resourced settings travel to limited-resourced environments to participate in clinical care, education, and/or research. Increasingly, there has been a call to promote parity in partnerships, including the development of bidirectional exchanges, where trainees from each institution travel to the partners setting to learn from and teach each other. As global health educators and steering committee members of the Association of Pediatric Program Directors Global Health Pediatric Education Group, we endorse the belief that we must move away from merely sending learners to international partner sites and instead become true global health partners offering equitable educational experiences. In this article, we summarize the benefits, review common challenges, and highlight solutions to hosting and providing meaningful global health experiences for learners from limited-resourced partner institutions to academic health centers in the United States.

Overcoming challenges to develop pediatric postgraduate training programs in low- and middle-income countries

Background: Interest is growing in strengthening postgraduate medical education in low-income countries. The purpose of this study was to understand how postgraduate pediatric training programs are developed in countries with no or few pediatric training opportunities. The authors sought to describe and compare a purposive sample of such new programs, and identify challenges and solutions for successful program establishment and sustainability. Methods: The authors queried national pediatric email lists and the Accreditation Council for Graduate Medical Education (ACGME) accredited pediatric residency programs in the United States to identify four pediatric training programs that met study criteria. All four programs responded to a questionnaire with quantitative and qualitative components. Qualitative responses were analyzed for themes. Results: Four centers - in Kenya, Laos, Eritrea and Cambodia - met study criteria. Reported challenges to program development and sustainability centered on faculty development and retention, training in pediatric subspecialties, creating pipelines for applicants and graduates, and funding. These themes were used to develop a logic model, which provides a framework for planning, implementing and evaluating new postgraduate general pediatric training program in low-income countries. Discussion: This study compares four postgraduate general pediatric training programs that were recently established and now continue to graduate pediatric residents in low-income countries. Lessons derived from these programs may help guide practice and research for other centers seeking to establish similar programs.

A Study of Global Health Elective Outcomes: A Pediatric Residency Experience

Background and Objectives: To identify the effects of global health electives over a decade in a pediatric residency program. Methods: This was an anonymous email survey of the Boston Combined Residency alumni funded for global health electives from 2002 to 2011. A test for trend in binomial proportions and logistic regression were used to document associations between elective and participant characteristics and the effects of the electives. Qualitative data were also analyzed. Results: Of the 104 alumni with available email addresses, 69 (66%) responded, describing 94 electives. Elective products included 27 curricula developed, 11 conference presentations, and 7 academic publications. Thirty-two (46%) alumni continued global health work. Previous experience, previous travel to the site, number of global electives, and cumulative global elective time were associated with postresidency work in global health or with the underserved. Conclusions: Resident global electives resulted in significant scholarship and teaching and contributed to long-term career trajectories.

Perspectives of host faculty and trainees on international visiting faculty to paediatric academic departments in East Africa

Background Investments in faculty exchanges to build physician workforce capacity are increasing. Little attention has been paid to the expectations of host institution faculty and trainees. This prospective qualitative research study explored faculty and resident perspectives about guest faculty in paediatric departments in East Africa, asking (1) What are the benefits and challenges of hosting guest faculty, (2) What factors influence the effectiveness of faculty visits and (3) How do host institutions prepare for faculty visits? Methods We recruited 36 faculty members and residents from among four paediatric departments in East Africa to participate in semistructured interviews which were audio recorded and transcribed. Data were qualitatively analysed using principles of open coding and thematic analysis. We achieved saturation of themes. Results Benefits of faculty visits varied based on the size and needs of host institutions. Emergent themes included the importance of guest faculty time commitment, and mutual preparation to ensure that visit goals and scheduling met host needs. We documented conflicts that developed around guest emotional responses and ethical approaches to clinical resource limitations, which some hosts tried to prepare for and mitigate. Imbalance in resources led to power differentials; some hosts sought partnerships to re-establish control over the process of having guests. Conclusions We identified that guest faculty can assist paediatric institutions in building capacity; however, effective visits require: (1) mutually agreed on goals with appropriate scheduling, visit length and commitment to ensure that the visits meet the hosts needs, (2) careful selection and preparation of guest faculty to meet the hosts goals, (3) emotional preparation by prospective guests along with host orientation to clinical work in the hosts setting and (4) attention to funding sources for the visit and mitigation of resulting power differentials.

Triage of Intermediate-Care Patients in Pediatric Hospitals

BACKGROUND Hospitalized children have a wide range of acuity and risk of decompensation. The objective of this study was to determine where pediatric patients are triaged when they present to pediatric hospitals needing intense monitoring and nursing care, but do not require invasive monitoring or technology. METHODS We completed a telephone survey of pediatric hospitals in the United States with at least 2 non-neonatal pediatric wards and at least 50 acute inpatient beds. The survey consisted of a brief scripted portrayal of 6 hypothetical patients who may be admitted to a hospitals general floor, ICU, or an intermediate care unit (IMCU). The scenarios included severe asthma, bronchiolitis, croup, diabetic ketoacidosis, and patients dependent on home ventilation via noninvasive interface or tracheostomy. The hospital bed coordinator or emergency department charge nurse was asked where each hypothetical patient would be admitted in their hospital. RESULTS A total192 hospitals met inclusion criteria and 164 hospitals (85%) responded. For all of the scenarios, most of the institutions triaged them to the PICU. Twenty-eight (17%) of the responding institutions triaged at least 1 of the patient scenarios to an IMCU. The presence of an IMCU decreased triage to the ICU for all scenarios when comparing hospitals with and without an IMCU (P < .001). CONCLUSIONS Inpatient triage practices among pediatric hospitals vary widely for patients who require intense nursing or frequent monitoring due to specific acute illnesses or respiratory technologies. Institutions that have an IMCU available are less likely to send these patients to the ICU.

New views on global child health: global solutions for care of vulnerable children in the United States.

Purpose of review This paper provides a brief overview of the current landscape of global child health and the impact of social determinants on the worlds children. In the United States (US), global child health (GCH) has increasingly been highlighted as a priority area by national organizations, such as the National Academy of Medicine and American Academy of Pediatrics, as well as individual pediatricians committed to ensuring the health of all children regardless of geographic location. Although GCH is commonly used to refer to the health of children outside of the US, here, we highlight the recent call for GCH to also include care of US vulnerable children. Many of the lessons learned from abroad can be applied to pediatrics domestically by addressing social determinants that contribute to health disparities. Recent findings Using the ‘three-delay’ framework, effective global health interventions target delays in seeking, accessing, and/or receiving adequate care. In resource-limited, international settings, novel health system strengthening approaches, such as peer groups, community health workers, health vouchers, cultural humility training, and provision of family-centered care, can mitigate barriers to healthcare and improve access to medical services. Summary The creative use of limited resources for pediatric care internationally may offer insight into effective strategies to address health challenges that children face here in the US. The growing number of child health providers with clinical experience in resource-limited, low-income countries can serve as an unforeseen yet formidable resource for improving pediatric care in underserved US communities.

The Collaborative Role of North American Departments of Pediatrics in Global Child Health

In this review, we describe the collaborative role of NA pediatrics departments in GCH education, and clinical practice and research summarizing challenges and best practices. Appeals for health equity call for departments of pediatrics to improve the health of all children including those from underserved communities in North America and around the world. Consequently, North American (NA) departments of pediatrics have a role in global child health (GCH) which focuses on providing health care to underserved children worldwide. In this review, we describe how NA departments of pediatrics can collaboratively engage in GCH education, clinical practice, research, and advocacy and summarize best practices, challenges, and next steps for engaging in GCH in each of these areas. For GCH in low- and middle-income countries (LMICs), best practices start with the establishment of ethical, equitable, and collaborative partnerships with LMIC communities, organizations, and institutions engaged in GCH who are responsible for the vast majority of work done in GCH. Other best practices include adequate preparation of trainees and clinicians for GCH experiences; alignment with local clinical and research priorities; contributions to local professional development and ongoing monitoring and evaluation. Challenges for departments include generating funding for GCH activities; recruitment and retention of GCH-focused faculty members; and challenges meeting best practices, particularly adequate preparation of trainees and clinicians and ensuring mutual benefit and reciprocity in NA–LMIC collaborations. We provide examples of how departments have overcome these challenges and suggest next steps for development of the role of NA departments of pediatrics in GCH. Collaborative implementation of best practices in GCH by LMIC–NA partnerships can contribute to reductions of child mortality and morbidity globally.

Landscape Analysis of Global Health Tracks in United States Pediatric Residencies: Moving Toward Standards

OBJECTIVE The number of pediatric Global Health (GH) tracks has more than doubled in less than 10 years. The goal of this study was to describe the characteristics of the pediatric GH tracks to identify commonalities and differences in track structure, funding, and education. In addition, we also identified demographic, institutional, and residency-related factors that were significantly associated with educational offerings and logistical challenges. METHODS A cross-sectional survey was electronically administered to pediatric residency programs with GH tracks. Statistical analyses included frequencies to describe GH track characteristics. Fishers exact tests were used to identify bivariate associations between track structure and funding with educational offerings and logistical challenges. RESULTS Leaders of 32 pediatric GH tracks (67%) completed the survey. The majority of GH tracks were completed within the 3 years of residency (94%) and identified a GH track director (100%); however, tracks varied in size, enrollment methods, domestic and international partnerships, funding, and evaluations. Dedicated faculty time and GH track budget amounts were associated with more robust infrastructure pertaining to resident international electives, including funding and mentorship. Many tracks did not meet American Academy of Pediatrics recommended standards for clinical international rotations. CONCLUSIONS Despite the presence of multiple similarities among pediatric GH tracks, there are large variations in track structure, education, and funding. The results from this study support the proposal of a formal definition and minimum standards for a GH track, which may provide a framework for quality, consistency, and comparison of GH tracks.