Induction of immune tolerance in patients with hemophilia A and inhibitors treated with porcine VIIIC by home therapy

Home therapy with porcine factor VIIIC was safe and effective when administered to five hemophilic patients over periods of 8 1/2, 6, 4, 3 1/2, and 2 years. No significant transfusion reactions occurred. Before treatment with porcine factor VIIIC, all five had high-level, high- responding anti-human VIIIC inhibitors initially lacking anti-porcine factor VIIIC activity. Although specific anti-porcine VIIIC inhibitors arose in all patients, these were generally transient, and only one patient became refractory to treatment. We believe that porcine factor VIIIC is the treatment of choice in patients whose inhibitors do not cross-react. All five patients lost their original anti-human VIIIC inhibitors after starting treatment with porcine VIIIC, permitting the reintroduction of human VIIIC in three of them. There has been no recurrence of anti-human VIIIC inhibitor activity during 2 to 3 years of regular treatment with human VIIIC in these patients. This suggests that tolerance to human VIIIC has arisen as a result of treatment with porcine VIIIC. Porcine VIIIC may have a role in the desensitization of some factor VIIIC inhibitor patients.     

An observational study of sun and heat protection during Canada Day outdoor celebration, 2003

Attendance at summer outdoor mass gatherings may lead to heat- and sun-related illness. The purposes of this study were: (1) to estimate the proportion of people in attendance at the 2003 Canada Day celebration in the National Capital Region who used sun and heat protective items; (2) to identify factors associated with the utilization of these protective items; and (3) to provide research data to public outdoor event organizers when developing evidence-based plans for safer events. A naturalistic observational cross-sectional method was used to gather information at the 2003 Canada Day celebration in the National Capital Region on attendees' demographics, the sun and heat protective items they used and the protective resources available at the event sites. Of the 398 observed attendees, the proportion using any one of the protective items ranged from 3 percent (an open umbrella) to 51.5 percent (sunglasses). Females were more likely to use protective items more than males, and adults more likely than children. Planners of public outdoor events should consider the factors that influence the utilization of sun and heat protective behaviours and the environmental modifications that would allow participants to make safe choices.     

Developing Signs of Safety: A Deaf-accessible counselling toolkit for trauma and addiction

The U.S. Deaf community—more than half a million Americans who communicate using American Sign Language (ASL)—experiences higher rates of trauma exposure and substance use disorder (SUD) than the general population. Yet there are no evidence-based treatments for any behavioural health condition that have been evaluated for use with Deaf people. The driving aim of our work, therefore, has been to develop and formally evaluate a Deaf-accessible trauma/SUD counselling approach. Here we describe our initial intervention development work and a single-arm pilot that evaluated the feasibility, acceptability, and preliminary clinical efficacy of Signs of Safety—a Deaf-accessible toolkit to be used with an existing, widely adopted protocol for trauma and addiction (Seeking Safety). Preliminary efficacy results indicated clinically significant reductions in PTSD symptoms and frequency of alcohol use for the Seeking Safety/Signs of Safety model. Frequency of drug use did not change significantly—likely attributable to the mid-study legalization of recreational marijuana in our state. Next steps include the redesign and refilming of Signs of Safety based on pilot participant feedback, again using a Deaf-engaged development and production process. This new toolkit will be tested via a pilot randomized controlled trial designed based on present methodological lessons learned.     

Pseudomalignancies of the head and neck

Pseudomalignancies are benign or reactive lesions that mimic malignant neoplasms either clinically or histologically. In the head and neck region there are a number of pseudomalignancies that may present to a histopathologist, including soft tissue lesions, benign odontogenic tumours and salivary gland pathology. In this review we discuss common pseudomalignant lesions that may present in the head and neck, including their clinical presentation, histopathological features and differential diagnosis.