Resilience after severe critical illness: a prospective, multicentre, observational study (RESIREA).

BACKGROUND: Critical-illness survivors may experience post-traumatic stress disorder (PTSD) and quality-of-life impairments. Resilience may protect against psychological trauma but has not been adequately studied after critical illness. We assessed resilience and its associations with PTSD and quality of life, and also identified factors associated with greater resilience. METHODS: This prospective, multicentre, study in patients recruited at 41 French ICUs was done in parallel with the NUTRIREA-3 trial in patients given mechanical ventilation and vasoactive amines for shock. Three months to one year after intensive-care-unit admission, survivors completed the Connor-Davidson Resilience Scale (CD-RISC-25), Impact of Event-Revised scale for PTSD symptoms (IES-R), SF-36 quality-of-life scale, Multidimensional Scale of Perceived Social Support (MSPSS), and Brief Illness Perception Questionnaire (B-IPQ). RESULTS: Of the 382 included patients, 203 (53.1%) had normal or high resilience (CD-RISC-25 ≥ 68). Of these resilient patients, 26 (12.8%) had moderate to severe PTSD symptoms (IES-R ≥ 24) vs. 45 (25.4%) patients with low resilience (p = 0.002). Resilient patients had higher SF-36 scores. Factors independently associated with higher CD-RISC-25 scores were higher MSPSS score indicating stronger social support (OR, 1.027; 95%CI 1.008-1.047; p = 0.005) and lower B-IPQ scores indicating a more threatening perception of the illness (OR, 0.973; 95%CI 0.950-0.996; p = 0.02). CONCLUSIONS: Resilient patients had a lower prevalence of PTSD symptoms and higher quality of life scores, compared to patients with low resilience. Higher scores for social support and illness perception were independently associated with greater resilience. Thus, our findings suggest that interventions to strengthen social support and improve illness perception may help to improve resilience. Such interventions should be evaluated in trials with PTSD mitigation and quality-of-life improvement as the target outcomes.

Perceived Quality of Life in Intensive Care Medicine Physicians: A French National Survey.

Purpose: There is a growing interest in the quality of work life (QWL) of healthcare professionals and staff well-being. We decided to measure the perceived QWL of ICU physicians and the factors that could influence their perception. Methods: We performed a survey coordinated and executed by the French Trade Union of Intensive Care Physicians (SMR). QWL was assessed using the French version of the Work-Related Quality of Life (WRQoL) scale, perceived stress using the French version of 10 item-Perceived Stress Scale (PSS-10) and group functioning using the French version of the Reflexivity Scale, the Social Support at Work Questionnaire (QSSP-P). Results: 308 French-speaking ICU physicians participated. 40% perceived low WRQoL, mainly due to low general well-being, low satisfaction with working conditions and low possibility of managing the articulation between their private and professional lives. Decreased QWL was associated with being a woman (p = .002), having children (p = .022) and enduring many monthly shifts (p = .022). Conclusions: This work highlights the fact that ICU physicians feel a significant imbalance between the demands of their profession and the resources at their disposal. Communication and exchanges within a team and quality of social support appear to be positive elements to maintain and/or develop within our structures.

[Trauma of intensive care workers in the face of a health crisis: a two-step psychological support]. / Traumatisme des soignants de réanimation face à la crise sanitaire.

The COVID-19 crisis has profoundly affected intensive care units. To protect themselves from the violence of the circumstances, the caregivers relied on their team membership, but it is in the aftermath that these situations seem to take their full traumatic dimension. A clinical case illustrates the two-step work of the psychologist with the caregivers and his role in the traumatic elaboration passing by an individual and collective reconquest of the caregiving function.

Emotional Impact of End-of-Life Decisions on Professional Relationships in the ICU: An Obstacle to Collegiality?

OBJECTIVES: End-of-life decisions are not only common in the ICU but also frequently elicit strong feelings among health professionals. Even though we seek to develop more collegial interprofessional approaches to care and health decision-making, there are many barriers to successfully managing complex decisions. The aim of this study is to better understand how emotions influence the end-of-life decision-making process among professionals working in ICU. DESIGN: Qualitative study with clinical interviews. All interviews were transcribed verbatim and analyzed thematically using interpretative phenomenological analysis. SETTING: Two independent ICUs at the "Centre Hospitalier de l'Université de Montréal." SUBJECTS: Ten physicians and 10 nurses. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: During the end-of-life decision-making process, families and patients restructure the decision-making frame by introducing a strong emotional dimension. This results in the emergence of new challenges quite different from the immediacy often associated with intensive care. In response to changes in decision frames, physicians rely on their relationship with the patient's family to assist with advanced care decisions. Nurses, however, draw on their relationship and proximity to the patient to denounce therapeutic obstinacy. CONCLUSIONS: Our study suggests that during the end-of-life decision-making process, nurses' feelings toward their patients and physicians' feelings toward their patients' families influence the decisions they make. Although these emotional dimensions allow nurses and physicians to act in a manner that is consistent with their professional ethics, the professionals themselves seem to have a poor understanding of these dimensions and often overlook them, thus hindering collegial decisions.

Error in intensive care: psychological repercussions and defense mechanisms among health professionals.

OBJECTIVE: To identify the psychological repercussions of an error on professionals in intensive care and to understand their evolution. To identify the psychological defense mechanisms used by professionals to cope with error. DESIGN: Qualitative study with clinical interviews. We transcribed recordings and analysed the data using an interpretative phenomenological analysis. SETTING: Two ICUs in the teaching hospitals of Besançon and Dijon (France). SUBJECTS: Fourteen professionals in intensive care (20 physicians and 20 nurses). INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: We conducted 40 individual semistructured interviews. The participants were invited to speak about the experience of error in ICU. The interviews were transcribed and analyzed thematically by three experts. In the month following the error, the professionals described feelings of guilt (53.8%) and shame (42.5%). These feelings were associated with anxiety states with rumination (37.5%) and fear for the patient (23%); a loss of confidence (32.5%); an inability to verbalize one's error (22.5%); questioning oneself at a professional level (20%); and anger toward the team (15%). In the long term, the error remains fixed in memory for many of the subjects (80%); on one hand, for 72.5%, it was associated with an increase in vigilance and verifications in their professional practice, and on the other hand, for three professionals, it was associated with a loss of confidence. Finally, three professionals felt guilt which still persisted at the time of the interview. We also observed different defense mechanisms implemented by the professional to fight against the emotional load inherent in the error: verbalization (70%), developing skills and knowledge (43%), rejecting responsibility (32.5%), and avoidance (23%). We also observed a minimization (60%) of the error during the interviews. CONCLUSIONS: It is important to take into account the psychological experience of error and the defense mechanisms developed following an error because they appear to determine the professional's capacity to acknowledge and disclose his/her error and to learn from it.

The computational fluid dynamics study of orientation effects of oar-blade.

The distribution of pressure coefficient formed when the fluid contacts with the kayak oar blade is not been studied extensively. The CFD technique was employed to calculate pressure coefficient distribution on the front and rear faces of oar blade resulting from the numerical resolution equations of the flow around the oar blade in the steady flow conditions (4 m/s) for three angular orientations of the oar (45°, 90°, 135°) with main flow. A three-dimensional (3D) geometric model of oar blade was modeled and the k-ε turbulent model was applied to compute the flow around the oar. The main results reported that, under steady state flow conditions, the drag coefficient (Cd = 2.01 for 4 m/s) at 90° orientation has the similar evolution for the different oar blade orientation to the direction of the flow. This is valid when the orientation of the blade is perpendicular to the direction of the flow. Results indicated that the angle of oar strongly influenced the Cd with maximum values for 90° angle of the oar. Moreover, the distribution of the pressure is different for the internal and external edges depending upon oar angle. Finally, the difference of negative pressure coefficient Cp in the rear side and the positive Cp in the front side, contributes toward propulsive force. The results indicate that CFD can be considered an interesting new approach for pressure coefficient calculation on kayak oar blade. The CFD approach could be a useful tool to evaluate the effects of different blade designs on the oar forces and consequently on the boat propulsion contributing toward the design improvement in future oar models. The dependence of variation of pressure coefficient on the angular position of oar with respect to flow direction gives valuable dynamic information, which can be used during training for kayak competition.

Post-traumatic stress disorder among ICU healthcare professionals before and after the Covid-19 health crisis: a narrative review.

BACKGROUND: The ICU (intensive care unit) involves potentially traumatic work for the professionals who work there. This narrative review seeks to identify the prevalence of post-traumatic stress disorder (PTSD) among ICU professionals; how PTSD has been assessed; the risk factors associated with PTSD; and the psychological support proposed. METHODS: Three databases and editorial portals were used to identify full-text articles published in English between 2009 and 2022 using the PRISMA method. RESULTS: Among the 914 articles obtained, 19 studies met our inclusion criteria. These were undertaken primarily during the Covid-19 period (n = 12) and focused on nurses and assistant nurses (n = 10); nurses and physicians (n = 8); or physicians only (n = 1). The presence of mild to severe PTSD among professionals ranged from 3.3 to 24% before the pandemic, to 16-73.3% after the pandemic. PTSD in ICU professionals seems specific with particularly intense intrusion symptoms. ICU professionals are confronted risk factors for PTSD: confrontation with death, unpredictability and uncertainty of care, and insecurity related to the crisis COVID-19. The studies show that improved communication, feeling protected and supported within the service, and having sufficient human and material resources seem to protect healthcare professionals from PTSD. However, they also reveal that ICU professionals find it difficult to ask for help. CONCLUSION: ICU professionals are particularly at risk of developing PTSD, especially since the Covid-19 health crisis. There seems to be an urgent need to develop prevention and support policies for professionals.

Mental Health Support for Hospital Staff during the COVID-19 Pandemic: Characteristics of the Services and Feedback from the Providers.

French authorities created mental health support services to accompany HCWs during the pandemic. We aimed to obtain feedback from staff providing these mental health support services within French hospitals to identify positive and negative features and avenues for improvement. A mixed-methods study was performed between 1 April and 30 June 2020. We contacted 77 centres to identify those providing mental health support services. We developed a questionnaire containing questions about the staff providing the service (quantitative part), with open questions to enable feedback from service providers (qualitative part). Of the 77 centres, 36 had mental health support services; 77.8% were created specifically for the epidemic. Services were staffed principally by psychologists, mainly used a telephone platform, and had a median opening time of 8 h/day. Thirty-seven professionals provided feedback, most aged 35-49 years. For 86.5%, it was their first time providing such support. Median self-reported comfort level was 8 (interquartiles 3-10), and 95% would do it again. Respondents reported (i) difficulties with work organisation, clinical situations, and lack of recognition and (ii) a desire for training. This study suggests that mental health support needs to be adapted to the needs of HCWs, both in terms of the content of the service and the timing of delivery.

Risk and protective factors for the possible development of post-traumatic stress disorder among intensive care professionals in France during the first peak of the COVID-19 epidemic.

Background: Intensive care units (ICU) are among the healthcare services most affected by the COVID-19 crisis. Stressors related to insecurity, unpredictability, patient death and family distress are significant, and put healthcare workers (HCWs) at high risk of post-traumatic stress disorder (PTSD). The aims of this study were to measure the prevalence of post-traumatic stress disorder in HCWs and to identify risk factors and protective factors during the epidemic in France. Methods: During the first peak of the epidemic (from 22 April to 13 May 2020), we assessed sources of stress (PS-ICU scale), mental health (GHQ-12) and coping strategies (Brief-COPE). Three months later (03 June to 6 July 2020), PTSD was assessed using the IES-R scale, with additional questions about sources of support. Data were collected using self-report questionnaires administered online. Results: Among 2153 professionals who participated in the study, 20.6% suffered from potential PTSD, mostly intrusion symptoms. Risk factors for the development of PTSD were having experienced additional difficult events during the crisis, having a high level of psychological distress, a high level of perceived stress related to the workload and human resources issues, the emotional burden related to the patient and family, and stressors specific to COVID-19 during the first peak of the crisis. The use of positive thinking coping strategies decreased the relationship between perceived stress and the presence of PTSD, while social support seeking strategies increased the relationship. Finally, the HCWs preferred to use support from colleagues, relatives and/or a psychologist, and very few used the telephone hotlines. Conclusion: The epidemic has had a strong traumatic impact on intensive care HCWs. Given the risk of PTSD, we need to consider implementing easily-accessible support services that focus on positive thinking coping strategies, during and after the crisis.

Antecedentes: Las unidades de cuidados intensivos (UCIs) se encuentran dentro de los servicios de salud más comprometidos por la crisis de la COVID-19. Los factores estresantes asociados a la inseguridad, la impredecibilidad, el fallecimiento de pacientes y la angustia familiar son considerables y colocan a los trabajadores de salud (TS) en un alto riesgo de trastorno de estrés postraumático (TEPT). Los objetivos de este estudio fueron el determinar la prevalencia del trastorno por estrés postraumático en TS e identificar los factores de riesgo y los factores protectores durante la epidemia en Francia.Métodos: Durante la primera ola de la epidemia (del 22 de abril al 13 de mayo del 2020) evaluamos fuentes de estrés (mediante la escala de percepción de factores estresantes en la UCI; PS-ICU en sus siglas en inglés), salud mental (mediante el cuestionario de salud general de 12 ítems; GHQ-12 en sus siglas en inglés) y estrategias de afrontamiento (mediante el inventario de la orientación del afrontamiento ante los problemas experimentados; Brief-COPE en sus siglas en inglés). Tres meses después (del 3 de junio al 6 de julio del 2020) se evaluó el TEPT mediante la escala de impacto del evento (IES-R en sus siglas en inglés) y con preguntas adicionales respecto a las fuentes de soporte. Se recolectó la información mediante cuestionarios de autoreporte realizados en línea.Resultados: De los 2.153 profesionales que participaron en el estudio, 20,6% padecían un potencial TEPT, predominando los síntomas intrusivos. Los factores de riesgo para el desarrollo del TEPT fueron el haber experimentado eventos difíciles adicionales durante la crisis, el tener un nivel elevado de angustia psicológica, un nivel alto de estrés percibido asociado a la carga laboral y a situaciones asociadas a los recursos humanos, la carga emocional relacionada al paciente y su familia, y los factores estresantes específicos de la COVID-19 durante la primera ola de la crisis. El uso del pensamiento positivo como estrategia de afrontamiento disminuía la relación entre el estrés percibido y la presencia del TEPT, mientras que las estrategias relacionadas con la búsqueda de soporte social incrementaban esta relación. Finalmente, los TS preferían emplear el soporte brindado por sus colegas, familiares y/o un psicólogo, mientras que muy pocos preferían el uso de líneas telefónicas de crisis.Conclusión: La epidemia ha tenido un fuerte impacto traumático sobre los TS de las UCIs. Dado el riesgo de TEPT, se necesita considerar la implementación de servicios de apoyo de fácil acceso que se enfoquen en el empleo del pensamiento positivo como estrategia de afrontamiento, tanto durante como después de la crisis.

Impact of the COVID-19 pandemic on the mental health of professionals in 77 hospitals in France.

The COVID-19 pandemic has led to significant re-organisation of healthcare delivery in hospitals, with repercussions on all professionals working in healthcare. We aimed to assess the impact of the pandemic on the mental health of professionals working in health care institutions and to identify individual and environmental factors influencing the risk of mental health disorders. From 4 June to 22 September 2020, a total of 4370 professionals responded to an online questionnaire evaluating psychological distress, severity of post-traumatic stress symptoms, stress factors, and coping strategies. About 57% of the professionals suffered from psychological distress, and 21% showed symptoms of potential post-traumatic stress. Professionals working in radiology, those working in quality/hygiene/security and nurses' aides were the most affected groups. The media focus on the crisis, and a high workload were the most prevalent stress factors, followed by uncertainty regarding the possibility of containing the epidemic, the constantly changing hygiene recommendations/protocols, and the lack of personal protective equipment. The use of coping strategies, notably positive thinking, helped to mitigate the relation between perceived stress and mental health disorders. The COVID-19 pandemic has had far-reaching negative repercussions for all professionals, with some sectors more markedly affected. To prevent mental health disorders in professionals during a public health crisis, support services and management strategies within hospitals should take account of the importance of positive thinking and social support.

A qualitative study of reinforcement workers' perceptions and experiences of working in intensive care during the COVID-19 pandemic: A PsyCOVID-ICU substudy.

PURPOSE: During the COVID pandemic, many hospitals had to mobilize reinforcement healthcare workers, especially in intensive care (ICUs). We investigated the perceptions and experiences of reinforcement workers deployed to ICUs, and the impact of deployment on their personal and professional lives. METHODS: For this qualitative study, a random sample of 30 reinforcement workers was drawn from 4 centres participating in the larger PsyCOVID-ICU study. Individual semi-structured interviews were held, recorded, transcribed and analyzed by thematic analysis. RESULTS: Thirty interviews were performed from April to May 2021 (22 nurses, 2 anesthesiology nurses, 6 nurses' aides). Average age was 36.8±9.5 years; 7 participants had no ICU experience. Four major themes emerged, namely: (1) Difficulties with integration, especially for those with no ICU experience; (2) lack of training; (3) difficulties with management, notably a feeling of insufficient communication; (4) Mental distress relating to the unusual work and fear of contaminating their entourage. CONCLUSION: Healthcare workers deployed as reinforcements to ICUs at the height of the pandemic had a unique experience of the crisis, and identified important gaps in organisation and preparation. They also suffered from a marked lack of training, given the stakes in the management of critically ill patients in the ICU.

In vitro testing of salt coating of fabrics as a potential antiviral agent in reusable face masks.

During the coronavirus disease (COVID-19) pandemic, wearing face masks in public spaces became mandatory in most countries. The risk of self-contamination when handling face masks, which was one of the earliest concerns, can be mitigated by adding antiviral coatings to the masks. In the present study, we evaluated the antiviral effectiveness of sodium chloride deposited on a fabric suitable for the manufacturing of reusable cloth masks using techniques adapted to the home environment. We tested eight coating conditions, involving both spraying and dipping methods and three salt dilutions. Influenza A H3N2 virus particles were incubated directly on the salt-coated materials, collected, and added to human 3D airway epithelial cultures. Live virus replication in the epithelia was quantified over time in collected apical washes. Relative to the non-coated material, salt deposits at or above 4.3 mg/cm2 markedly reduced viral replication. However, even for larger quantities of salt, the effectiveness of the coating remained dependent on the crystal size and distribution, which in turn depended on the coating technique. These findings confirm the suitability of salt coating as antiviral protection on cloth masks, but also emphasize that particular attention should be paid to the coating protocol when developing consumer solutions.

A qualitative study of the perceptions and experiences of healthcare providers caring for critically ill patients during the first wave of the COVID-19 pandemic: A PsyCOVID-ICU substudy.

BACKGROUND: Intensive care unit (ICU) staff have faced unprecedented levels of stress, in the context of profound upheaval of their working environment due to the COVID-19 pandemic. We explored the perceptions of frontline ICU staff about the first wave of the COVID-19 pandemic, and how this experience impacted their personal and professional lives. METHODS: In a qualitative study as part of the PsyCOVID-ICU project, we conducted semi-structured interviews with a random sample of nurses and nurses' aides from 5 centres participating in the main PsyCOVID study. Interviews were recorded and fully transcribed, and analysed by thematic analysis. RESULTS: A total of 18 interviews were performed from 13 August to 6 October 2020; 13 were nurses, and 5 were nurses' aides. Thematic analysis revealed three major themes, namely: (1) Managing the home life; (2) Conditions in the workplace; and (3) the meaning of their profession. CONCLUSION: In this qualitative study investigating the experiences and perceptions of healthcare workers caring for critically ill patients during the first COVID-19 wave in France, the participants reported that the crisis had profound repercussions on both their personal and professional lives. The main factors affecting the participants were a fear of contamination, and the re-organisation of working conditions, against a background of a media "infodemic".

[The clinical practice of the psychologist in intensive care]. / La pratique clinique du psychologue en réanimation.

The intensive care psychologist was strongly mobilised during the COVID-19 health crisis. His clinical practice is both specific, with regard to the situations of extreme suffering that he is led to encounter, but also plural, as he is faced with the intersecting vulnerabilities of patients, families and carers.

An international tool to measure perceived stressors in intensive care units: the PS-ICU scale.

BACKGROUND: The intensive care unit is increasingly recognized as a stressful environment for healthcare professionals. This context has an impact on the health of these professionals but also on the quality of their personal and professional life. However, there is currently no validated scale to measure specific stressors perceived by healthcare professionals in intensive care. The aim of this study was to construct and validate in three languages a perceived stressors scale more specific to intensive care units (ICU). RESULTS: We conducted a three-phase study between 2016 and 2019: (1) identification of stressors based on the verbatim of 165 nurses and physicians from 4 countries (Canada, France, Italy, and Spain). We identified 99 stressors, including those common to most healthcare professions (called generic), as well as stressors more specific to ICU professionals (called specific); (2) item elaboration and selection by a panel of interdisciplinary experts to build a provisional 99-item version of the scale. This version was pre-tested with 70 professionals in the 4 countries and enabled us to select 50 relevant items; (3) test of the validity of the scale in 497 ICU healthcare professionals. Factor analyses identified six dimensions: lack of fit with families and organizational functioning; patient- and family-related emotional load; complex/at risk situations and skill-related issues; workload and human resource management issues; difficulties related to team working; and suboptimal care situations. Correlations of the PS-ICU scale with a generic stressors measure (i.e., the Job Content Questionnaire) tested its convergent validity, while its correlations with the Maslach Burnout Inventory-HSS examined its concurrent validity. We also assessed the test-retest reliability of PS-ICU with intraclass correlation coefficients. CONCLUSIONS: The perceived stressors in intensive care units (PS-ICU) scale have good psychometric properties in all countries. It includes six broad dimensions covering generic or specific stressors to ICU, and thus, enables the identification of work situations that are likely to generate high levels of stress at the individual and unit levels. For future studies, this tool will enable the implementation of targeted corrective actions on which intervention research can be based. It also enables national and international comparisons of stressors' impact.

Mental health and stress among ICU healthcare professionals in France according to intensity of the COVID-19 epidemic.

BACKGROUND: We investigated the impact of the COVID-19 crisis on mental health of professionals working in the intensive care unit (ICU) according to the intensity of the epidemic in France. METHODS: This cross-sectional survey was conducted in 77 French hospitals from April 22 to May 13 2020. All ICU frontline healthcare workers were eligible. The primary endpoint was the mental health, assessed using the 12-item General Health Questionnaire. Sources of stress during the crisis were assessed using the Perceived Stressors in Intensive Care Units (PS-ICU) scale. Epidemic intensity was defined as high or low for each region based on publicly available data from Santé Publique France. Effects were assessed using linear mixed models, moderation and mediation analyses. RESULTS: In total, 2643 health professionals participated; 64.36% in high-intensity zones. Professionals in areas with greater epidemic intensity were at higher risk of mental health issues (p < 0.001), and higher levels of overall perceived stress (p < 0.001), compared to low-intensity zones. Factors associated with higher overall perceived stress were female sex (B = 0.13; 95% confidence interval [CI] = 0.08-0.17), having a relative at risk of COVID-19 (B = 0.14; 95%-CI = 0.09-0.18) and working in high-intensity zones (B = 0.11; 95%-CI = 0.02-0.20). Perceived stress mediated the impact of the crisis context on mental health (B = 0.23, 95%-CI = 0.05, 0.41) and the impact of stress on mental health was moderated by positive thinking, b = - 0.32, 95% CI = - 0.54, - 0.11. CONCLUSION: COVID-19 negatively impacted the mental health of ICU professionals. Professionals working in zones where the epidemic was of high intensity were significantly more affected, with higher levels of perceived stress. This study is supported by a grant from the French Ministry of Health (PHRC-COVID 2020).

Ethical dilemmas due to the Covid-19 pandemic.

The devastating pandemic that has stricken the worldwide population induced an unprecedented influx of patients in ICUs, raising ethical concerns not only surrounding triage and withdrawal of life support decisions, but also regarding family visits and quality of end-of-life support. These ingredients are liable to shake up our ethical principles, sharpen our ethical dilemmas, and lead to situations of major caregiver sufferings. Proposals have been made to rationalize triage policies in conjunction with ethical justifications. However, whatever the angle of approach, imbalance between utilitarian and individual ethics leads to unsolvable discomforts that caregivers will need to overcome. With this in mind, we aimed to point out some critical ethical choices with which ICU caregivers have been confronted during the Covid-19 pandemic and to underline their limits. The formalized strategies integrating the relevant tools of ethical reflection were disseminated without deviating from usual practices, leaving to intensivists the ultimate choice of decision.

Scales Used to Measure Job Stressors in Intensive Care Units: Are They Relevant and Reliable? A Systematic Review.

Background: Many studies have been conducted in intensive care units (ICUs) to identify the stress factors involved in the health of professionals and the quality and safety of care. The objectives are to identify the psychometric scales used in these studies to measure stressors and to assess their relevance and validity/reliability. Methods: All peer-reviewed full-text articles published in English between 1997 and 2016 and focusing on an empirical quantitative study of job stressors were identified through searches on seven databases and editorial portals. Results: From the 102 studies analyzed, we identified 59 different scales: 17 "all settings scales" (16 validated scales), 20 "healthcare settings scales" (13 validated scales), and 22 "ICU settings scales" (two validated scales). All these scales used measured stressors from at least one of the following eight broad categories: High job demands, Problematic relationships with other professionals, Lack of control over work situations and career, Lack of organizational resources, Problematic situations with users and relatives, Dealing with ethical- and moral-related situations, Risk management issues, and Disadvantages in comparison to other occupational situations. The "all settings scales" and "healthcare settings scales," the most often validated, did not measure, or only slightly measured, the stressors most specific to ICUs. Where these were taken into account, the authors were forced to develop their own tools or modify existing scales without testing the validity of the tool used. Conclusions: This review highlights the lack of a tool that meets both the criteria of validity and relevance with regard to the specificity of work in ICUs. Future research must focus on developing reliable/valid tools covering all types of relevant stressors to ensure the quality of the studies carried out in this field.

3D human microvessel-on-a-chip model for studying monocyte-to-endothelium adhesion under flow - application in systems toxicology.

Lifestyle and genetic factors can lead to the development of atherosclerosis and, ultimately, cardiovascular adverse events. Rodent models are commonly used to investigate mechanism(s) of atherogenesis. However, the 3Rs principles, aiming to limit animal testing, encourage the scientific community to develop new physiologically relevant in vitro alternatives. Leveraging the 96-chip OrganoPlate®, a microfluidic platform, we have established a three-dimensional (3D) model of endothelial microvessels-on-a-chip under flow using primary human coronary arterial endothelial cells. As functional readout, we have set up an assay to measure the adhesion of monocytes to the lumen of perfused microvessels. For monitoring molecular changes in microvessels, we have established the staining and quantification of specific protein markers of inflammation and oxidative stress using high content imaging, as well as analyzed transcriptome changes using microarrays. To demonstrate its usefulness in systems toxicology, we leveraged our 3D vasculature-on-a-chip model to assess the impact of the Tobacco Heating System (THS) 2.2, a candidate modified risk tobacco product, and the 3R4F reference cigarette on the adhesion of monocytic cells to endothelial microvessels. Our results show that THS 2.2 aerosol-conditioned medium had a reduced effect on monocyte-endothelium adhesion compared with 3R4F smoke-conditioned medium. In conclusion, we have established a relevant 3D vasculature-on-a-chip model for investigating leukocyte-endothelial microvessel adhesion. A case study illustrates how the model can be used for product testing in the context of systems toxicology-based risk assessment. The current model and its potential further development options also open perspectives of applications in vascular disease research and drug discovery.