Impacts of chemical modification on the toxicity of diverse nanocellulose materials to developing zebrafish.

Cellulose is an abundant and renewable resource currently being investigated for utility in nanomaterial form for various promising applications ranging from medical and pharmaceutical uses to mechanical reinforcement and biofuels. The utility of nanocellulose and wide implementation ensures increasing exposure to humans and the environment as nanocellulose-based technologies advance. Here, we investigate how differences in aspect ratio and changes to surface chemistry, as well as synthesis methods, influence the biocompatibility of nanocellulose materials using the embryonic zebrafish. Investigations into the toxicity of neutral, cationic and anionic surface functionalities revealed that surface chemistry had a minimal influence on the overall toxicity of nanocellulose materials. Higher aspect ratio cellulose nanofibers produced by mechanical homogenization were, in some cases, more toxic than other cellulose-based nanofibers or nanocrystals produced by chemical synthesis methods. Using fluorescently labeled nanocellulose we were able to show that nanocellulose uptake did occur in embryonic zebrafish during development. We conclude that the benign nature of nanocellulose materials makes them an ideal platform to systematically investigate the inherent surface features driving nanomaterial toxicity in order to create safer design principles for engineered nanoparticles.

Healthy workplaces and effective teamwork: viewed through the lens of primary healthcare renewal.

This commentary reviews the content of the lead papers through the lens of primary healthcare renewal (PHCR). Although PHCR has been on the national agenda for decades, only since the turn of the century has real progress been made with emerging new practice models based on inter-professional team care. While much is expected, relatively little is known of the function and effectiveness of such teams in Canada. As well, information regarding healthy workplaces has focused on individual professional groups rather than an inter-professional workforce. Much of the knowledge currently available regarding team effectiveness and healthy workplaces comes from the hospital sector and may not be completely transferable. The work of the Interprofessional Education for Collaborative Patient-Centred Practice initiative and the results of the Health Transition Fund and Primary Health Care Transition Fund are additional key sources of research and knowledge transfer to guide the education, function and evaluation of inter-professional teamwork in these new primary healthcare practice models.

Effectiveness of an enhanced peer assessment program: introducing education into regulatory assessment.

INTRODUCTION: The College of Physicians and Surgeons of Ontario developed an enhanced peer assessment (EPA), the goal of which was to provide participating physicians educational value by helping them identify specific learning needs and aligning the assessment process with the principles of continuing education and professional development. In this article, we examine the educational value of the EPA and whether physicians will change their practice as a result of the recommendations received during the assessment. METHODS: A group of 41 randomly selected physicians (23 general or family practitioners, 7 obstetrician-gynecologists, and 11 general surgeons) agreed to participate in the EPA pilot. Nine experienced peer assessors were trained in the principles of knowledge translation and the use of practice resources (tool kits) and clinical practice guidelines. The EPA was evaluated through the use of a postassessment questionnaire and focus groups. RESULTS: The physicians felt that the EPA was fair and educationally valuable. Most focus group participants indicated that they implemented recommendations made by the assessor and made changes to some aspect of their practice. The physicians' suggestions for improvement included expanding the assessment beyond the current medical record review and interview format (eg, to include multisource feedback), having assessments occur at regular intervals (eg, every 5 to 10 years), and improving the administrative process by which physicians apply for educational credit for EPA activities. CONCLUSIONS: The EPA pilot study has demonstrated that providing detailed individualized feedback and optimizing the one-to-one interaction between assessors and physicians is a promising method for changing physician behavior. The college has started the process of aligning all its peer assessments with the principles of continuing professional development outlined in the EPA model.

Family physician/nurse practitioner: stories of collaboration.

AIMS: This paper presents the experiences of nurse practitioners and family physicians working in collaborative practice at four Canadian rural primary care agencies. It focuses on the qualitative segment of a larger study examining the impact of an educational intervention on interprofessional practice. BACKGROUND: Growing awareness of the importance of health promotion and disease prevention, the increased complexity of community-based care, and the need to use scarce human healthcare resources, especially family physicians, far more efficiently and effectively, have resulted in increased emphasis on primary healthcare renewal in Canada. Key to primary healthcare renewal is care delivery through interdisciplinary teams that include nurse practitioners. METHODS: Narrative analysis, a form of interpretive analysis that respects the integrity of the stories told by participants, was chosen as the strategy to examine the narrative data gathered in two sets of interviews with the nurse practitioners and family physicians. The study was undertaken during 2000. RESULTS: Thirteen family physicians and five nurse practitioners with diverse educational backgrounds and varied experience with collaboration participated in the qualitative component of the study. A number of issues related to working in a shared practice were identified in nurse practitioner and family physician interviews across the research sites. The themes identified in participants' stories included issues related to the scope of practice, emphasizing the importance of role clarity and trust, the ideological difference regarding disease prevention and health promotion, differences in perceptions about the operation of collaborative practice, and the understanding that collaborative relationships evolve. CONCLUSIONS: The placement of nurse practitioners and family physicians in a common clinical practice without some form of orientation process does not produce collaborative practice. Educational strategies related to role expectations are necessary to facilitate the development of care delivery partnerships characterized by interdependent practice.

Preterm delivery among Inuit women in the Baffin Region of the Canadian Arctic.

OBJECTIVE: To evaluate the rate and causes of preterm (before 37 weeks gestation) and very preterm (before 32 weeks gestation) delivery among a population of Inuit living in Canada. STUDY DESIGN: Three-year retrospective cross-sectional review of charts for patients delivering in the Baffin Region of Canada. RESULTS: There were 938 births over the study period; 95% to Inuit women. Inuit women had a preterm delivery rate of 18.2% and a very preterm delivery rate of 2.4%, more than twice the Canadian national average. Sociodemographic risk factors for preterm delivery including substance use, young age, single marital status, and poor nutrition, occurred more frequently among Inuit women compared to non-Inuit women, but were not independently associated with prematurity. Known medical and obstetrical risk factors were associated with preterm delivery among Inuit women; history of prior preterm delivery, multiple pregnancy, placenta previa, poor weight gain and vaginal bleeding after 20 weeks gestation. Hospitalization rates and infant mortality were higher among preterm infants. The most common indication for hospitalization was respiratory infection (51.1%) followed by other infection (15.8%). CONCLUSION: Inuit women had preterm and very preterm delivery rates more than twice the Canadian national average. Preterm delivery was associated with several medical risk factors and resulted in significant increases in infant hospitalization and mortality.