Exposure to tungsten particles via inhalation triggers early toxicity marker expression in the rat brain.

OBJECTIVE: Our work is focused on tungsten, considered as an emerging contaminant. Its environmental dispersion is partly due to mining and military activities. Exposure scenario can also be occupational, in areas such as the hard metal industry and specific nuclear facilities. Our study investigated the cerebral effects induced by the inhalation of tungsten particles. METHODS: Inhalation exposure campaigns were carried out at two different concentrations (5 and 80 mg/m3) in single and repeated modes (4 consecutive days) in adult rats within a nose-only inhalation chamber. Processes involved in brain toxicity were investigated 24 h after exposure. RESULTS AND DISCUSSION: Site-specific effects in terms of neuroanatomy and concentration-dependent changes in specific cellular actors were observed. Results obtained in the olfactory bulb suggest a potential early effect on the survival of microglial cells. Depending on the mode of exposure, these cells showed a decrease in density accompanied by an increase in an apoptotic marker. An abnormal phenotype of the nuclei of mature neurons, suggesting neuronal suffering, was also observed in the frontal cortex, and can be linked to the involvement of oxidative stress. The differential effects observed according to exposure patterns could involve two components: local (brain-specific) and/or systemic. Indeed, tungsten, in addition to being found in the lungs and kidneys, was present in the brain of animals exposed to the high concentration. CONCLUSION: Our data question the perceived innocuity of tungsten relative to other metals and raise hypotheses regarding possible adaptive or neurotoxic mechanisms that could ultimately alter neuronal integrity.

Barriers and facilitators of access and utilization of mental health services among forensic service users along the care pathway.

BACKGROUND: The verdict of Not Criminally Responsible on account of a Mental Disorder (NCRMD) is increasingly used to access specialized mental health services in Canada and elsewhere. This situation highlights the importance of ensuring timely access to services in the community to prevent violence and justice involvement. The objective of the present study is to identify individual and contextual barriers and facilitators of access to mental health services during the period preceding an offense leading to a verdict of NCRMD. METHODS: The sample includes 753 people found NCRMD in Québec, Canada. All episodes of mental health hospitalizations and service use before the index offense were identified using provincial administrative health data, for an average period of 4.5 years. Access was conceptualized as a function of the possibility of seeking, reaching and receiving appropriate health care services, based on Lévesque and colleagues patient-centred model of access to care. Generalized linear models were computed to identify the individual and contextual predictors of: (1) seeking mental healthcare (at least one contact with any type of services for mental health reasons); (2) reaching psychiatric care (at least one contact with a psychiatrist); (3) receiving psychiatric care, operationalized as (3a) continuity and (3b) intensity. Factors associated with volume of emergency mental health services were examined as exploratory analysis. RESULTS: Geographical considerations were highly important in determining who reached, and who received specialized mental health care - above and beyond individual factors related to need. Those who lived outside of major urban centres were 2.6 times as likely to reach psychiatric services as those who lived in major urban centres, and made greater use of emergency mental health services by 2.1 times. Living with family decreased the odds of seeking mental healthcare by half and the intensity of psychiatric care received, even when adjusting for level of need. CONCLUSIONS: Findings support efforts to engage with the family of service users and highlights the importance of providing resources to make family-centred services sustainable for health practitioners. Health policies should also focus on the implementation of outreach programs, such as Forensic Assertive Community Treatment teams as part of prevention initiatives.

Radiation dose rate effects: what is new and what is needed?

Despite decades of research to understand the biological effects of ionising radiation, there is still much uncertainty over the role of dose rate. Motivated by a virtual workshop on the "Effects of spatial and temporal variation in dose delivery" organised in November 2020 by the Multidisciplinary Low Dose Initiative (MELODI), here, we review studies to date exploring dose rate effects, highlighting significant findings, recent advances and to provide perspective and recommendations for requirements and direction of future work. A comprehensive range of studies is considered, including molecular, cellular, animal, and human studies, with a focus on low linear-energy-transfer radiation exposure. Limits and advantages of each type of study are discussed, and a focus is made on future research needs.

Pathways to Recovery among Homeless People with Mental Illness: Is Impulsiveness Getting in the Way?

OBJECTIVE: This study investigates the association between impulsiveness and six dimensions of recovery among homeless people with mental illness. METHOD: The sample was composed of 418 participants of a randomized controlled trial of Housing First, a recovery-oriented program that provides immediate access to permanent housing. The reliable change index method was used to provide an estimate of the statistical and clinical significance of the change from baseline to 24 months (i.e., clinically meaningful improvement), on outcomes that pertain to recovery dimensions: psychiatric symptoms (clinical), physical health and substance use problems (physical), residential stability (functional), arrests (criminological), community integration (social), and hope and personal confidence (existential). We tested for the effect of impulsiveness, assessed with the Barratt Impulsiveness Scale-11, on clinically meaningful improvement on each specific outcome, adjusting for age, gender and intervention assignment, as both intervention arms were included in the analysis. RESULTS: For every increase in total impulsiveness score by one standard deviation, the odds of experiencing clinically meaningful improvement decreased by 29% (OR = 0.71, 95% CI, 0.55 to 0.91) on the clinical dimension and by 53% (OR = 0.47, 95% CI, 0.32 to 0.68) on the existential dimension. However, changes in outcomes pertaining to physical, functional, criminological, and social dimensions were not significantly influenced by impulsiveness. CONCLUSIONS: Findings highlight the importance of addressing impulsiveness in the context of recovery-oriented interventions for homeless people with mental illness. Further research may be required to improve interventions that are responsive to unique needs of impulsive individuals to support clinical and existential recovery.

Current Landscape of Teaching Diversity in Occupational Therapy Education: A Scoping Review.

IMPORTANCE: Critical research in health professions education makes clear the role of educational institutions in perpetuating problematic discourses related to diversity, as well as their potential role in dismantling and rebuilding those discourses to reflect the realities of power relations that create systemic injustice. OBJECTIVE: To provide a comprehensive overview of current pedagogical practices and educational paradigms used by occupational therapy educators to teach concepts of, and skills for, equity and diversity. DATA SOURCES: Seven education and health care databases were searched for articles published between 2007 and 2018. STUDY SELECTION AND DATA COLLECTION: Consensually developed criteria were refined until an agreement rate of >80% was achieved among the authors. Inclusion criteria focused on entry-level occupational therapy education across the world and explicitly examined approaches to teaching diversity. All articles meeting the criteria were kept for full-text review (N = 87). FINDINGS: Diversity in professional occupational therapy education programs is taught within five main underlying educational paradigms and theories: competency-based (44%), social justice (29%), critical (11%), social accountability (10%), and constructivism (6%). Within these paradigms, 14 key pedagogical practices were applied, with community service learning (37%), international service learning (25%), and didactic or course-based practices (23%) making up the majority of pedagogical practices. CONCLUSIONS AND RELEVANCE: Although current occupational therapy research demonstrates a trend toward critical paradigms and practices, problematic cultural competency theories and uncritical international service learning practices continue to dominate occupational therapy education for diversity. Educators should implement pedagogies and approaches within critical educational paradigms. WHAT THIS ARTICLE ADDS: This article highlights the importance to occupational therapy education of attending to coherence across educational ethics, paradigms, and learning outcomes in teaching for diversity and health equity.

The Impact of Housing First on Criminal Justice Outcomes among Homeless People with Mental Illness: A Systematic Review.

OBJECTIVE: Housing First is increasingly put forward as an important component of a pragmatic plan to end homelessness. The literature evaluating the impact of Housing First on criminal justice involvement has not yet been systematically examined. The objective of this systematic review is to examine the impact of Housing First on criminal justice outcomes among homeless people with mental illness. METHOD: Five electronic databases (PsycINFO, MEDLINE, Embase, CINAHL, Web of Science) were searched up until July 2018 for randomised and nonrandomised studies of Housing First among homeless people with a serious mental disorder. RESULTS: Five studies were included for a total of 7128 participants. Two studies from a randomised controlled trial found no effect of Housing First on arrests compared to treatment as usual. Other studies compared Housing First to other programs or compared configurations of HF and found reductions in criminal justice involvement among Housing First participants. CONCLUSIONS: This systematic review suggests that Housing First, on average, has little impact on criminal justice involvement. Community services such as Housing First are potentially an important setting to put in place strategies to reduce criminal justice involvement. However, forensic mental health approaches such as risk assessment and management strategies and interventions may need to be integrated into existing services to better address potential underlying individual criminogenic risk factors. Further outcome assessment studies would be necessary.

Catalytic degradation of O-cresol using H2 O2 onto Algerian Clay-Na.

Clay material is used as a catalyst to degrade an organic pollutant. This study focused on the O-cresol oxidative degradation in aqueous solution by adding H2 O2 and Mont-Na. The catalytic tests showed a high catalytic activity of Mont-Na, which made it possible to achieve more than 84.6% conversion after 90 min of reaction time at 55°C in 23.2 mM H2 O2 . The pH value was found to be negatively correlated with the degradation rate of O-cresol. UV-Vis spectrophotometry revealed that the increase of degradation rate at low pH is related to the formation of 2-methylbenzoquinone as intermediate product. In addition, the content of iron in Mont-Na decreased after the catalytic test, bringing further evidence about the O-cresol catalytic oxidation. The mineralization of O-cresol is also confirmed by the different methods of characterization of Mont-Na after the catalytic oxidation test. The effect of the O-cresol oxidation catalyzed by natural clay is significant. PRACTITIONER POINTS: Algerian Montmorillonite-Na is used as a catalyst to degrade an organic pollutant: O-cresol. It shows a great potential for catalyst properties in the presence of the oxidizing reagent H2 O2 . It proved to be an effective means for the degradation of O-cresol contained in wastewaters.

Preparation of mesoporous activated carbon from date stones for the adsorption of Bemacid Red.

This work concerns the elimination of the organic pollutant; Bemacid Red (BR), a rather persistent dye present in wastewater from the textile industry in western Algeria, by adsorption on carbon from an agricultural waste in the optimal conditions of the adsorption process. An active carbon was synthesized by treating an agro-alimentary waste, the date stones that are very abundant in Algeria, physically and chemically. Sample after activation (SAA) with phosphoric acid was highly efficient for the removal of BR. The characterization of this porous material has shown a specific surface area that exceeds 900 m2/g with the presence of mesopores. The iodine value also indicates that the activated carbon obtained has a large micro porosity. The reduction of the infrared spectroscopy (FTIR) bands reveals that the waste has been synthesized and activated in good conditions. Parameters influencing the adsorption process have been studied and optimized, such as contact time, adsorbent mass, solution pH, initial dye concentration and temperature. The results show that for a contact time of 60 min, a mass of 0.5 g and at room temperature, the adsorption rate of the BR by the SAA is at its maximum. Pseudo-first-order, pseudo-second-order and intraparticle diffusion models were studied to analyse adsorption kinetics. The result shows the adsorption kinetic is best with the pseudo-second-order model. In this study, Langmuir, Freundlich and Temkin isotherms were investigated for adsorption of BR onto SAA. The Freundlich and Temkin isotherms have the highest correlations coefficients. The suggested adsorption process involves multilayer adsorption with the creation of chemical bonds. The mechanism of adsorption of BR by SAA is spontaneous and exothermic, and the Gibbs free energy values confirm that the elimination of the textile dye follows a physisorption.

A mouse model of cytogenetic analysis to evaluate caesium137 radiation dose exposure and contamination level in lymphocytes.

In case of external overexposure to ionizing radiation, an estimation of its genotoxic effects on exposed individuals can be made retrospectively by the measurement of radiation-induced chromosome aberrations on circulating lymphocytes. Compared with external irradiation, intakes of radionuclides may, however, lead to specific features influencing dose distribution at the scale of body, of tissue or even of cell. Therefore, in case of internal contamination by radionuclides, experimental studies, particularly using animal models, are required to better understand mechanisms of their genotoxic effects and to better estimate the absorbed dose. The present study was designed to evaluate a cytogenetic method in mouse peripheral blood lymphocytes that would allow determination of yields and complexities of chromosome aberrations after low-dose rate exposure to (137)Cs delivered in vitro either by irradiation or by contamination. By using M-FISH analysis, we compared the low-dose rate responses observed in mouse to the high-dose rate responses observed both in mouse and in human. Promising similarities between the two species in the relative biological effect evaluation show that our cytogenetic model established in mouse might be useful to evaluate various radiation exposures, particularly relevant in case of intakes of radionuclides.

Concerted Uranium Research in Europe (CURE): toward a collaborative project integrating dosimetry, epidemiology and radiobiology to study the effects of occupational uranium exposure.

The potential health impacts of chronic exposures to uranium, as they occur in occupational settings, are not well characterized. Most epidemiological studies have been limited by small sample sizes, and a lack of harmonization of methods used to quantify radiation doses resulting from uranium exposure. Experimental studies have shown that uranium has biological effects, but their implications for human health are not clear. New studies that would combine the strengths of large, well-designed epidemiological datasets with those of state-of-the-art biological methods would help improve the characterization of the biological and health effects of occupational uranium exposure. The aim of the European Commission concerted action CURE (Concerted Uranium Research in Europe) was to develop protocols for such a future collaborative research project, in which dosimetry, epidemiology and biology would be integrated to better characterize the effects of occupational uranium exposure. These protocols were developed from existing European cohorts of workers exposed to uranium together with expertise in epidemiology, biology and dosimetry of CURE partner institutions. The preparatory work of CURE should allow a large scale collaborative project to be launched, in order to better characterize the effects of uranium exposure and more generally of alpha particles and low doses of ionizing radiation.

Postsecondary academic achievement and first-episode psychosis: A mixed-methods study.

BACKGROUND: Postsecondary academic achievement as an area of functional recovery for young adults living with mental illness has received little research attention. PURPOSE: This study had three purposes: to compare rates of participation, performance, and satisfaction in postsecondary education between young adults with first-episode psychosis and closely matched young adults; to identify characteristics associated with academic participation; and to explore the processes associated with educational experiences. METHOD: One hundred young adults ages 18 to 30 participated in the study. Quantitative data on academic engagement, performance, and satisfaction, and qualitative data (n = 52) on academic experiences were integrated through pattern analyzes. FINDINGS: Young adults with psychosis were significantly less likely to be engaged in postsecondary education. No difference appeared for the extent of engagement, but performance and satisfaction were lower among participants with psychosis. Participants engaged in reflexive decision making to access postsecondary education and to maintain adequate academic performance. Strategies used by successful students with mental illness were identified. IMPLICATIONS: Assessment and intervention focused on educational needs and skills should become landmark practices for psychiatric rehabilitation practitioners, including occupational therapists.

Lymphoepithelial Carcinoma of the Sublingual Gland: Case Report and Review of the Literature.

Lymphoepithelial carcinoma represents only 0.4% of salivary gland neoplasms. Generally affecting the parotid gland, it has been reported only twice in the sublingual gland. Controversies concerning the treatment of lymphoepithelial carcinoma exist. Although the literature generally agrees that primary surgery with adjuvant radiotherapy is part of the treatment, the benefit of adjuvant chemotherapy is not well described. This report describes the case of a 55-year-old man diagnosed with lymphoepithelial carcinoma of the sublingual gland. The patient was admitted for progressive pain in the floor of the mouth associated with trismus. Biopsy examination confirmed the diagnosis of lymphoepithelial carcinoma of the sublingual gland and magnetic resonance imaging showed multiple left lymphadenopathies. Surgery consisted of a radical neck dissection type III, surgical resection of the floor of the mouth, and reconstruction with a left facial artery musculomucosal flap. The patient received adjuvant radiotherapy (60 Gy) and adjuvant chemotherapy (3 cycles of cisplatinum 100 mg/m(2)). The patient was disease free at 36 months of follow-up. The evidence base for administering adjuvant chemotherapy in this situation is discussed.

Risk factors for homelessness and housing instability in the first episode of mental illness: Initial findings from the AMONT study.

AIM: People living with mental illness are more likely than the general population to experience adverse housing outcomes, including homelessness. The aim of the current study is to examine residential status when participants have their first contact with mental health services, and the correlates of residential status at that moment. METHODS: First-time mental health service users were recruited from seven clinical sites across Québec. Data on residential status at entry in the project, as well as demographic, clinical and social variables, were collected using self-report and interviewer-rated questionnaires. Participants were classified as 'Homeless', 'At risk of homelessness' and 'Stably Housed', and correlates of residential status were identified through multivariate logistic regression and unbiased recursive partitioning. RESULTS: Among the 478 participants, 206 (43.1%) were in stable housing, 171 (35.8%) were at risk of homelessness and 101 (21.1%) were classified as homeless. Placement in a youth protection facility was strongly associated with adverse housing outcomes, while having a high school diploma and more social support were associated with more stable housing situations. CONCLUSIONS: First-time mental health service users are likely to experience a range of adverse housing situations, indicating the potential for clinical sites to implement homelessness primary prevention strategies. Factors related to family, foster care and schooling seem to be particularly salient in understanding risk of homelessness in first-time mental health service users, calling for intersectoral action to prevent adverse psychosocial outcomes in this population.

[Housing experiences of new mental health service users: Specific characteristics and developmental issues]. / Les expériences en logement des personnes en début de parcours d'utilisation de services psychiatriques : spécificités et enjeux développementaux.

Objectives Access to stable, safe, and affordable housing is an important determinant of health and community integration among people living with mental illness. Previous studies on housing stability, housing satisfaction and residential preferences among people living with mental illness have primarily been conducted among those with extensive service use experiences. First-time mental health service users, and youth in particular, are likely to present with distinct housing needs. The current study aimed to explore the housing experiences of new mental health service users, as well as the perceived obstacles and facilitators to their residential stability. Methods Projet AMONT is a longitudinal mixed-methods cohort study on the residential trajectories of service users in the 36 months after their initial contact with psychiatric services. The qualitative component consisted in a qualitative descriptive study. Semi-structured individual interviews were conducted with fourteen individuals at the beginning of their service use trajectory. Findings The thematic analysis uncovered how the emergence of mental illness and initial contacts with psychiatric services are associated with transformations in the area of housing and, for many, with housing instability. This instability might occur in continuity with adverse early life trajectories, or through the disruption caused by the emergence of mental illness. Informal social support emerged as the main protective factor against housing instability. Housing satisfaction was associated with multiple and sometimes conflicting needs regarding privacy, safety, social interactions, response to basic needs, performance of activities of daily living, and community integration. The specific developmental issues of youth at the beginning of their service use trajectories influence housing stability and satisfaction. Their housing then becomes a reflection of and laboratory for identity exploration and consolidation. Conclusion The findings highlight the importance of adopting a homelessness prevention lens among people living with a first episode of mental illness, particularly youth with adverse early life trajectories. Many existing approaches could be implemented or strengthened: cross-sector partnerships with all actors present in the trajectories of people with emerging mental illness; family approaches in early intervention, peer support, and screening for unstable housing situations. Adapting practices to the specific developmental characteristics of youth seem to be a key for homelessness prevention for this population.

Housing and home-leaving experiences of young adults with psychotic disorders: a comparative qualitative study.

Housing stability is a key component of rehabilitation for individuals with severe mental illnesses but remains a challenge for mental health service providers, particularly with young adults experiencing early mental health difficulties. The aim of this study is to explore perceptions of housing and home-leaving processes among young adults with emerging psychotic disorders and to compare it to the perceptions of young adults without psychotic disorders. A qualitative, grounded theory based, multiple case study was conducted among 52 adults aged 18-30 years old. Two core categories emerged in relation with perception of housing: choice/control over the residential environment, and housing opportunities over time. Difference between the groups include more coerced home-leaving for young adults with first-episode psychosis and low levels of choice, control and opportunities for a sub-group of participants living in group homes. The housing situation of young adults is analyzed and discussed from a systemic perspective.

Competencies for occupational therapy practice in homelessness: A Delphi study.

BACKGROUND: Homelessness is growing internationally, and resources to guide occupational therapy practice in this area are needed. OBJECTIVES: To identify competencies needed for occupational therapists to support individuals during and following homelessness. MATERIAL AND METHODS: We conducted a three-round Delphi study with occupational therapy practitioners and researchers with expertise in homelessness. RESULTS: Of 35 potential participants, n = 16 participated in Round I, n = 20 participated in Round II, and n = 18 participated in Round III. Participants included occupational therapists and researchers in Canada, United States, Brazil, UK, Ireland and New Zealand. Consensus was achieved on a total of 93 competencies in 10 categories after 15 were eliminated in Rounds II and III. The categories with the greatest number of competencies included occupational knowledge (n = 18), followed by psychosocial competencies (n = 16). CONCLUSIONS AND SIGNIFICANCE: This study represents the first to identify the competencies needed for occupational therapists working in the area of homelessness. Practitioners and educators are encouraged to view the identified competencies as a guide for the professional development of occupational therapists in this context. Stakeholders consulted for this study were able to communicate in English and situated in middle to high-income countries. As such, the competencies identified in this study only apply to these sociocultural contexts.

Housing trajectories and the risk of homelessness among new mental health service users: Protocol for the AMONT study.

AIMS: High rates of mental illness among individuals experiencing homelessness, as well as documented contacts with psychiatric services prior to episodes of homelessness, indicate that early intervention could play a key role in homelessness prevention. Decision-makers and clinical teams need longitudinal data on housing trajectories following initial contact with psychiatric services, as well as on predictors of risk of housing instability and homelessness. This paper describes the AMONT study, a mixed-methods naturalistic longitudinal cohort study of individuals identified as new psychiatric service users in seven clinical sites across the province of Québec (Canada). METHODS: The goal of AMONT is to examine the housing situations of individuals over 36 months after their initial contact with psychiatric services, and to identify environmental and individual correlates and predictors of housing outcomes. Participants complete a broad battery of instruments at baseline and follow-up assessments after 24 and 36 months. We explore housing stability following an initial episode of psychiatric service use from the perspective of service users, family members, and service providers, through qualitative interviews. RESULTS AND CONCLUSIONS: The findings from the AMONT study will yield a better understanding of the residential pathways of individuals with mental illness, from their first contact with psychiatric services and for 3 years subsequently. This will inform service providers, decision-makers and managers on the specific housing concerns and issues that affect first-time mental health service users. This in turn can lead to the development and implementation of evidence-informed practices and policies that aim to prevent instability and homelessness.

Bridging the transition from homelessness: Developing an occupational therapy framework.

BACKGROUND: Occupational therapists support individuals experiencing homelessness in traditional roles, and occupational therapy positions focussed specifically on homelessness appear to be growing. OBJECTIVES: To develop and refine a framework to guide occupational therapy practice and research in homelessness. METHOD: We developed a framework and refined it through a stakeholder consultation process conducted with 17 international occupational therapy experts using an online survey. In this survey, we presented an initial framework and requested qualitative feedback. We analyzed this qualitative data using content analysis. RESULTS: Stakeholder feedback was categorized into eight recommendations: (1) Revision to the 'four processes'; (2) Emphasizing social justice and systems-level advocacy; (3) Reflecting intersectionality; (4) Emphasizing meaningful activity; (5) Emphasizing peer support; (6) Incorporating a focus on independent living skills; (7) Increasing a focus on an activity for addressing substance misuse; and (8) Acknowledging cognitive and physical health. Each of these recommendations was incorporated into a refined version of this framework. These recommendations and a refined version of the framework are presented in this paper. CONCLUSIONS: We have developed and refined a framework aimed at guiding practice and research in occupational therapy in homelessness that will be evaluated in future research. SIGNIFICANCE: Though a range of frameworks exists for guiding the practice of occupational therapists more generally, this framework represents the first that is focussed specifically on guiding occupational therapy practice and research with individuals who experience homelessness. Research and practice implications are discussed.

Renal toxicity and biokinetics models after repeated uranium instillation.

During nuclear fuel processing, workers can potentially be exposed to repeated inhalations of uranium compounds. Uranium nephrotoxicity is well documented after acute uranium intake, but it is controversial after long-term or protracted exposure. This study aims to analyze the nephrotoxicity threshold after repeated uranium exposure through upper airways and to investigate the resulting uranium biokinetics in comparison to reference models. Mice (C57BL/6J) were exposed to uranyl nitrate (0.03-3 mg/kg/day) via intranasal instillation four times a week for two weeks. Concentrations of uranium in urines and tissues were measured at regular time points (from day 1 to 91 post-exposure). At each exposure level, the amount of uranium retained in organs/tissues (kidney, lung, bone, nasal compartment, carcass) and excreta (urine, feces) reflected the two consecutive weeks of instillation except for renal uranium retention for the highest uranium dose. Nephrotoxicity biomarkers, KIM-1, clusterin and osteopontin, are induced from day 4 to day 21 and associated with changes in renal function (arterial fluxes) measured using non-invasive functional imaging (Doppler-ultrasonography) and confirmed by renal histopathological analysis. These results suggest that specific biokinetic models should be developed to consider altered uranium excretion and retention in kidney due to nephrotoxicity. The threshold is between 0.25 and 1 mg/kg/day after repeated exposure to uranium via upper airways.

[Complex Trauma and Forensic Mental Health Services: Towards Trauma-informed Care]. / Traumatismes complexes et services psycholégaux : vers des pratiques sensibles au trauma.

Objectives Exposure to repeated traumatic events during childhood and adolescence is associated with high prevalences of mental illness, addictions, physical health conditions, and psychosocial difficulties (Felitti et al., 2019). The most common consequence of exposure to trauma is violence towards self and others (Hughes et al., 2017). The very high prevalence of complex trauma among forensic mental health service users challenges these settings to modify their practices, training approaches, policies, and service delivery approaches. The objective of this article is to contribute to such a transformation of forensic mental health services by clarifying the impacts of complex trauma on the trajectories and experiences of forensic mental health services users, as well as practices responding to complex trauma. Methods We reviewed the published and grey literature on complex trauma among forensic mental health service users. After synthesizing the findings, they were contrasted with our experiences as clinicians and researchers in the field of forensic mental health care through the development of a case vignette. Results We first identify the role of complex trauma and victimization in the development and maintenance of violent behaviours. We describe the negative experiences of services and care settings reported by individuals with complex trauma in the absence of recognition and understanding of traumatic experiences and their impacts. We highlight the fundamental principles of trauma-informed care (trust and transparency; safety; peer support; collaboration and reciprocity; empowerment and choice; sensitivity to gender, cultural and historical differences), as well as the clinical and organizational approaches emerging from those principles. Next, we describe the approaches developed internationally to apply and implement trauma-informed care in forensic mental health setting, and the opportunities and challenges associated with their implementation in the Québec context. Conclusion To date, few studies have documented and evaluated the implementation of trauma-informed care in forensic mental health settings. The literature reviewed in this paper indicates that an in-depth understanding of complex trauma among forensic mental health service users should be at the core of contemporary forensic research, policies and practices.