Publications by authors named "Hamelin A"

This paper presents the thermal behavior of non-resonant (quasi-static) piezoelectric biaxial MEMS scanners with Bragg reflectors. These scanners were developed for LIDAR (LIght Detection And Ranging) applications using a pulsed 1550 nm laser with an average power of 2 W. At this power, a standard metal (gold) reflector can overheat and be damaged.

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Background: Few studies have evaluated allergy workup in fixed drug eruption (FDE) in a large population.

Objective: To evaluate the sensitivity of a standardized allergy workup for diagnosing the cause of FDE, with a focus on in situ repeated open application tests (ROATs).

Methods: In a retrospective multicenter study, we analyzed the practice of conducting a complete allergy workup for the etiological diagnosis of FDE.

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Purpose: To determine the physical compatibility of 10% calcium chloride and 10% calcium gluconate in combination with injectable solutions, administered in the paediatric and adult intensive care unit setting during toxicological resuscitation involving calcium channel blockers and beta-blockers.

Methods: Forty-eight combinations were prepared at room temperature, including the following products: calcium chloride, calcium gluconate, insulin, epinephrine, norepinephrine, highly concentrated dextrose solution, sodium chloride, Plasma-Lyte A and Ringer's lactate. A visual evaluation at times 0, 1, 4, 24, 48 and 72 hours and a particle count test with the LS-20 particle counter at times 0, 4, 24 and 72 hours were performed.

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This paper presents the fabrication and characterization of a biaxial MEMS (MicroElectroMechanical System) scanner based on PZT (Lead Zirconate Titanate) which incorporates a low-absorption dielectric multilayer coating, i.e., a Bragg reflector.

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Background: Food shopping behaviors may help determine how local food environments influence fruit and vegetable (F/V) intake, especially among food insecure households.

Objective: To examine whether household food security, food access, and food shopping behaviors are associated with F/V intake among residents of a low-income neighborhood.

Design: Study design is cross-sectional.

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Population health intervention research (PHIR) is a particular field of health research that aims to generate knowledge that contributes to the sustainable improvement of population health by enabling the implementation of cross-sectoral solutions adapted to social realities. Despite the ethical issues that necessarily raise its social agenda, the ethics of PHIR is still not very formalized. Unresolved ethical challenges may limit its focus on health equity.

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Objectives: Polydactyly has been described in two breeds of domestic cats (Maine Coon and Pixie Bob) and in some outbred domestic cats (eg, Hemingway cats). In most cases, feline polydactyly is a non-syndromic preaxial polydactyly. Three variants located in a regulatory sequence involved in limb development, named ZRS (zone of polarising activity regulatory sequence), have been identified to be responsible for feline polydactyly.

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Food insecurity may lead to depressive symptoms, which are known to be associated with poor HIV related health outcomes. However, it is unclear to what extent food insecurity 'directly' affects these outcomes. We used data from the Food Security & HIV-HCV Sub-Study of the Canadian Co-Infection Cohort to assess the controlled direct effect.

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The oral case presentation represents a unique method of communication and forms the foundation for trainee-supervisor interactions in the clinical setting. Recently, entrustment has been highlighted as an essential element of trainee-supervisor interactions. Despite the growing body of knowledge concerning entrustment in medical education, how supervisors conceptualize the oral case presentation as a contributor to entrustment decision making during clinical supervision remains unknown.

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Objective: Assessment of the efficacy and safety of omalizumab in chronic urticaria refractory to conventional treatment (H1-antihistamines at high dosage and montelukast) in real-life practice.

Patients And Methods: A retrospective, descriptive, single-centre study was performed of the data for all patients presenting refractory chronic spontaneous urticaria or inducible urticaria and receiving omalizumab (300mg every four weeks) from November 2012 to June 2016.

Results: In all, 23 patients were included.

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Aim: Our aim was to assess the prevalence of adverse effects (AEs) pertaining to the use and withdrawal of hydroxychloroquine (HCQ) in dermatological outpatients.

Patients And Methods: We conducted a retrospective study between January 2013 and June 2014 that included consecutive patients currently or previously receiving HCQ seen in our department. AEs were collated using a standardized questionnaire and validated by clinical and laboratory examination.

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Injection drug use (IDU) and food insecurity (FI) are highly prevalent among individuals living with HIV-hepatitis C virus (HCV) co-infection. We quantified the association between IDU and FI among co-infected individuals using biannual data from the Canadian Co-infection Cohort (N = 608, 2012-2015). IDU (in the past six months) and IDU frequency (non-weekly/weekly in the past month) were self-reported.

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Objective: To identify potential pathways by which a variety of factors act to lead to unsuppressed viral load.

Design: A prospective cohort of HIV-HCV co-infected adults receiving care from 18 HIV clinics across Canada was followed every 6 months between November 2012 and October 2015. Participants with at least two visits while receiving combined antiretroviral treatment (cART) were included.

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Background: Better alignment between academia and public health practice and policies are critical to improve public health actions. Training of future researchers to address complex issues and to conduct transdisciplinary and collaborative research will help improve this alignment. In this paper, we describe the role of internship placements and mentorship for trainees' skills development in population health intervention research and the benefits of embedding research trainees within public health organizations.

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Background: Severe food insecurity (FI) is common among individuals living with HIV-hepatitis C virus (HCV) co-infection. We hypothesize that the injection of opioids is partly responsible for the association between injection drug use and severe FI. Therefore, this analysis examines whether methadone maintenance treatment for opioid dependence is associated with a lower risk of severe FI.

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Depressive symptoms are associated with poor HIV viral control and immune recovery among people living with HIV. However, no prior studies assessed this association exclusively among people co-infected with HIV-hepatitis C virus (HCV). While people with HIV only and those with HIV-HCV co-infection share many characteristics, co-infected people may become more susceptible to the effects of depressive symptoms on health outcomes.

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Objectives: The aim of this study was to determine the impact of food insecurity (FI) on HIV viral load and CD4 count among people coinfected with HIV and hepatitis C virus (HCV).

Methods: This study was conducted using data from the Food Security & HIV-HCV Sub-Study of the Canadian Co-Infection Cohort study. FI was measured using the adult scale of Health Canada's Household Food Security Survey Module and was classified into three categories: food security, moderate food insecurity and severe food insecurity.

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Food insecurity (FI) is associated with depressive symptoms among HIV mono-infected people. Our objective was to examine to what extent this association holds among HIV-hepatitis C virus (HCV) co-infected people. We used data from a prospective cohort study of HIV-HCV co-infected people in Canada.

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Patients with diabetes who are in emerging adulthood, defined as the life stage between 18 and 29 years of age, have unique challenges in managing their illness and are at risk for acute complications and loss to follow up. This study's objective was to describe emergency department (ED) utilization because of hyperglycemia in emerging adults with diabetes and to characterize 30-day outcomes, including return visits and admission for hyperglycemia. This was a health-records review of emerging adults presenting over a 1-year period to 4 tertiary care EDs; the patients had known histories of diabetes and final diagnoses of hyperglycemia, diabetic ketoacidosis or hyperosmolar hyperglycemia.

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Objectives: Patients with poorly controlled diabetes mellitus may have a sentinel emergency department (ED) visit for a precipitating condition prior to presenting for a hyperglycemic emergency, such as diabetic ketoacidosis (DKA) or hyperosmolar hyperglycemic state (HHS). This study's objective was to describe the epidemiology and outcomes of patients with a sentinel ED visit prior to their hyperglycemic emergency visit.

Methods: This was a 1-year health records review of patients≥18 years old presenting to one of four tertiary care EDs with a discharge diagnosis of hyperglycemia, DKA, or HHS.

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