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Psychedelic treatment with psilocybin is receiving increased attention following clinical trials showing it may help treat end-of-life anxiety, depression, and several other conditions. Despite this, physicians may be reluctant to prescribe psilocybin and carry out psilocybin treatment because of the stigma surrounding psychedelics and the potential for medical malpractice liability. This paper explores whether psilocybin treatment gives rise to a risk of medical malpractice liability for physicians. Following an overview of psilocybin treatment and its regulatory regime in Canada, exploratory vignettes are used to highlight the relevance and limits of malpractice claims. This paper argues that the lack of established medical standards, standardized training, and credentialing contribute to liability risks surrounding psilocybin treatment. More clinical trials, meta-studies of research analyses, and knowledge sharing will help to develop training programs and medical standards of practice to better realize psilocybin’s potential.
Expanding crop diversity is essential to address the imminent challenges of agriculture. This is especially true for organic farming, which relies on locally adapted species and varieties. Recently, participatory research approaches have emerged as effective means to support this endeavour. In this study, we collaborated with several stakeholders in the Lyon region, France, to evaluate three minor species related to common wheat (Triticum aestivum subsp. aestivum): einkorn (Triticum monococcum subsp. monococcum), emmer (Triticum turgidum subsp. dicoccum) and spelt (Triticum aestivum subsp. spelta (L.) Thell). First, we assessed the agronomic characteristics of each species, highlighting a distinction of einkorn that was associated with high tillering, high protein content, a long phenological cycle, small kernels and low relative yields. Second, we compared intra-species variabilities, revealing greater variation in emmer and spelt. Lastly, outcomes of the participatory approach, including testing adaptive methods and fostering collective learning, may interest other participatory research groups.
Prolonged grief is a chronic and debilitating condition that affects millions of persons worldwide. The aim of this study was to use a qualitative approach to better understand how relatives with prolonged grief disorder perceive what does or not help them and whether they were able to make recommendations.
Methods
Participants were all relatives of deceased patients admitted to 26 palliative care units involved in the FamiLife study; relatives were included if diagnosed with prolonged grief symptoms (i.e., Inventory Complicated Grief (ICG) questionnaire with a cut-off >25), and volunteered to participate. Semi-directed telephone interviews were conducted by psychologists between 6 and 12 months after the patient’s death. The interviews were open-ended, without a pre-established grid, then transcribed and analyzed using a thematic approach.
Results
Overall, 199/608 (32.7%) relatives were diagnosed with prolonged grief symptoms, i.e., with an ICG score >25, and 39/199 (20%) agreed to be interviewed. The analysis yielded 4 themes: (1) the experience of mourning: intense sadness and guilt (reported by 35/39 participants, 90%); (2) aggravating factors (38/39, 97%): feeling unprepared for death and loneliness, presence of interpersonal barriers to adjustment, external elements hindering the mourning progress; (3) facilitating factors (39/39, 100%): having inner strength or forcing oneself to get better, availability of social and emotional support; and (4) the suggestions grieving relatives had to alleviate the grief burden (36/39, 92%). The analysis enabled to identify 5 suggestions for relieving the grief burden: improving communication, developing education about death and grief, maintaining contact, offering psychological support, and choosing the right time for the palliative care team to contact the relatives.
Conclusions
This study revealed how bereaved relatives experienced the help provided by the healthcare teams, their representations, and what could be improved. These findings could be used to design intervention studies.
Promising studies show that psilocybin-assisted therapy relieves existential distress in patients with serious illnesses, a difficult condition to treat with current treatment options. There is growing interest in this therapy in palliative care. Canada recently amended its laws to allow physicians to request psilocybin for end-of-life distress. However, barriers to access remain. Since implementing psilocybin-assisted therapy within palliative care depends on the attitudes of healthcare providers willing to recommend it, they should be actively engaged in the broader discussion about this treatment option. We aimed (1) to identify issues and concerns regarding the acceptability of this therapy among palliative care professionals and to discuss ways of remedying them and (2) to identify factors that may facilitate access.
Methods
A qualitative study design and World Café methodology were adopted to collect data. The event was held on April 24, 2023, with 16 palliative care professionals. The data was analyzed following an inductive approach.
Results
Although participants were interested in psilocybin-assisted therapy, several concerns and needs were identified. Educational and certified training needs, medical legalization of psilocybin, more research, refinement of therapy protocols, reflections on the type of professionals dispensing the therapy, the treatment venue, and eligibility criteria for treatment were discussed.
Significance of results
Palliative care professionals consider psilocybin-assisted therapy a treatment of interest, but it generates several concerns. According to our results, the acceptability of the therapy and the expansion of its access seem interrelated. The development of guidelines will be essential to encourage wider therapy deployment.
Psychological consequences of grief among relatives are insufficiently known. We reported incidence of prolonged grief among relatives of deceased patients with cancer.
Methods
Prospective cohort study of 611 relatives of 531 patients with cancer hospitalized for more than 72 hours and who died in 26 palliative care units was conducted. The primary outcome was prolonged grief in relatives 6 months after patient death, measured with the Inventory Complicated Grief (ICG > 25, range 0–76, a higher score indicates more severe symptoms) score. Secondary outcomes in relatives 6 months after patient death were anxiety and depression symptoms based on Hospital Anxiety and Depression Scale (HADS) score (range 0 [best]–42 [worst]), higher scores indicate more severe symptoms, minimally important difference 2.5. Post-traumatic stress disorder symptoms were defined by an Impact Event Scale-Revised score >22 (range 0–88, a higher score indicates more severe symptoms).
Results
Among 611 included relatives, 608 (99.5%) completed the trial. At 6 months, significant ICG scores were reported by 32.7% relatives (199/608, 95% CI, 29.0–36.4). The median (interquartile range ICG score) was 20.0 (11.5–29.0). The incidence of HADS symptoms was 87.5% (95% CI, 84.8–90.2%) at Days 3–5 and 68.7% (95% CI, 65.0–72.4) 6 months after patient’s death, with a median (interquartile range) difference of −4 (–10 to 0) between these 2 time points. Improvement in HADS anxiety and depression scores were reported by 62.5% (362/579) relatives.
Significance of results
These findings support the importance of screening relatives having risk factors of developing prolonged grief in the palliative unit and 6 months after patient’s death.
We report on the generation and delivery of 10.2 PW peak power laser pulses, using the High Power Laser System at the Extreme Laser Infrastructure – Nuclear Physics facility. In this work we demonstrate for the first time, to the best of our knowledge, the compression and propagation of full energy, full aperture, laser pulses that reach a power level of more than 10 PW.
Reading comprehension and fluency are crucial for successful academic learning and achievement. Yet, a rather large percentage of children still have enormous difficulties in understanding a written text at the end of primary school. In this context, the aim of our study was to investigate whether text simplification, a process of reducing text complexity while keeping its meaning unchanged, can improve reading fluency and comprehension for children learning to read. Furthermore, we were interested in finding out whether some readers would benefit more than others from text simplification as a function of their cognitive and language profile. To address these issues, we developed an iBook application for iPads, which allowed us to present normal and simplified versions of informative and narrative texts to 165 children in grade 2. Reading fluency was measured for each sentence, and text comprehension was measured for each text using multiple-choice questions. The results showed that both reading fluency and reading comprehension were significantly better for simplified than for normal texts. Results showed that poor readers and children with weaker cognitive skills (nonverbal intelligence, memory) benefitted to a greater extent from simplification than good readers and children with somewhat stronger cognitive skills.
The aim of this paper was to investigate the diagnostic specificity of the self-critical and dependent depressive experiences in a clinical sample of eating disorder patients and to explore the impact of adverse childhood experiences on these dimensions of personality.
Method
A sample of 94 anorexic and 61 bulimic patients meeting DSM-IV criteria and 236 matched controls were assessed with the Depressive Experience Questionnaire (DEQ), the abridged version of the Beck Depression Inventory (BDI) and the AMDP Life Events Inventory. Subjects presenting a major depression or a comorbid addictive disorder were excluded from the sample using the Mini International Neuropsychiatric Interview (MINI).
Results
Anorexic and bulimic patients showed higher scores than controls on both self-criticism and dependency sub-scales of the DEQ. Bulimic patients scored significantly higher than anorexic patients on self-criticism and reported more adverse childhood experiences. Finally, negative life events correlated only with self-criticism in the whole sample.
Discussion
Differences in the DEQ Self-Criticism between anorexics and bulimics could not be accounted for by depression since bulimic patients did not show higher BDI levels compared to anorexic patients and depressive symptoms measured with the BDI were not found to be significant predictors of diagnostic grouping in a logistic multiple regression.
Conclusion
This study supports the diagnostic specificity of the dependent and self-critical depressive dimensions in eating disorders and strengthens previous research on the role of early experiences in the development of these disorders.
During pregnancy, mothers-to-be should adapt their diet to meet increases in nutrient requirements. Pregnant women appear to be keener to adopt healthier diets, but are not always successful. The objective of the present study was to determine whether a guided, stepwise and tailored dietary counselling programme, designed using an optimisation algorithm, could improve the nutrient adequacy of the diet of pregnant women, beyond generic guidelines. Pregnant women (n 80) who attended Notre-Dame-de-Bon-Secours Maternity Clinic were randomly allocated to the control or intervention arm. Dietary data were obtained twice from an online 3-d dietary record. The nutrient adequacy of the diet was calculated using the PANDiet score, a 100-point diet quality index adapted to the specific nutrient requirements for pregnancy. Women were supplied with generic dietary guidelines in a reference booklet. In the intervention arm, they also received nine sets of tailored dietary advice identified by an optimisation algorithm as best improving their PANDiet score. Pregnant women (n 78) completed the 12-week dietary follow-up. Initial PANDiet scores were similar in the control and intervention arms (60·4 (sd 7·3) v. 60·3 (sd 7·3), P = 0·92). The PANDiet score increased in the intervention arm (+3·6 (sd 9·3), P = 0·02) but not in the control arm (−0·3 (sd 7·3), P = 0·77), and these changes differed between arms (P = 0·04). In the intervention arm, there were improvements in the probabilities of adequacy for α-linolenic acid, thiamin, folate and cholesterol intakes (P < 0·05). Tailored dietary counselling using a computer-based algorithm is more effective than generic dietary counselling alone in improving the nutrient adequacy of the diet of French women in mid-pregnancy.
Low and middle-income countries (LMICs) bear a disproportionately high burden of sepsis, contributing to an estimated 90% of global sepsis-related deaths. Critical care capabilities needed for septic patients, such as continuous vital sign monitoring, are often unavailable in LMICs.
Aim:
This study aimed to assess the feasibility and accuracy of using a small wireless, wearable biosensor device linked to a smartphone, and a cloud analytics platform for continuous vital sign monitoring in emergency department (ED) patients with suspected sepsis in Rwanda.
Methods:
This was a prospective observational study of adult and pediatric patients (≥ 2 months) with suspected sepsis presenting to Kigali University Teaching Hospital ED. Biosensor devices were applied to patients’ chest walls and continuously recorded vital signs (including heart rate and respiratory rate) for the duration of their ED course. These vital signs were compared to intermittent, manually-collected vital signs performed by a research nurse every 6-8 hours. Pearson’s correlation coefficients were calculated over the study population to determine the correlation between the vital signs obtained from the biosensor device and those collected manually.
Results:
42 patients (20 adults, 22 children) were enrolled. Mean duration of monitoring with the biosensor device was 34.4 hours. Biosensor and manual vital signs were strongly correlated for heart rate (r=0.87, p<0.001) and respiratory rate (r=0.74 p<0.001). Feasibility issues occurred in 9/42 (21%) patients, although were minor and included biosensor falling off (4.8%), technical/connectivity problems (7.1%), removal by a physician (2.4%), removal for a procedure (2.4%), and patient/parent desire to remove the device (4.8%).
Discussion:
Wearable biosensor devices can be feasibly implemented and provide accurate continuous vital sign measurements in critically ill pediatric and adult patients with suspected sepsis in a resource-limited setting. Further prospective studies evaluating the impact of biosensor devices on improving clinical outcomes for septic patients are needed.
We longitudinally observed and assessed the impact of the operating room (OR) staff movements and door openings on surrogates of the exogenous infectious risk using a new technology system.
Design and setting:
This multicenter observational study included 13 ORs from 10 hospitals, performing planned cardiac and orthopedic surgery (total hip or knee replacement). Door openings during the surgical procedure were obtained from data collected by inertial sensors fixed on the doors. Intraoperative staff movements were captured by a network of 8 infrared cameras. For each surgical procedure, 3 microbiological air counts, longitudinal particles counts, and 1 bacteriological sample of the wound before skin closure were performed. Statistics were performed using a linear mixed model for longitudinal data.
Results:
We included 34 orthopedic and 25 cardiac procedures. The median frequency of door openings from incision to closure was independently associated with an increased log10 0.3 µm particle (ß, 0.03; standard deviation [SD], 0.01; P = .01) and air microbial count (ß, 0.07; SD, 0.03; P = .03) but was not significantly correlated with the wound contamination before closure (r = 0.13; P = .32). The number of persons (ß, −0.08; SD, 0.03; P < .01), and the cumulated movements by the surgical team (ß, 0.0004; SD, 0.0005; P < .01) were associated with log10 0.3 µm particle counts.
Conclusions:
This study has demonstrated a previously missing association between intraoperative staff movements and surrogates of the exogenous risk of surgical site infection. Restriction of staff movements and door openings should be considered for the control of the intraoperative exogenous infectious risk.
People with social anxiety disorder (SAD) fear social interactions and may be reluctant to seek treatments involving exposure to social situations. Social exposure conducted in virtual reality (VR), embedded in individual cognitive–behavioural therapy (CBT), could be an answer.
Aims
To show that conducting VR exposure in CBT for SAD is effective and is more practical for therapists than conducting exposure in vivo.
Method
Participants were randomly assigned to either VR exposure (n = 17), in vivo exposure (n = 22) or waiting list (n = 20). Participants in the active arms received individual CBT for 14 weekly sessions and outcome was assessed with questionnaires and a behaviour avoidance test. (Trial registration number ISRCTN99747069.)
Results
Improvements were found on the primary (Liebowitz Social Anxiety Scale) and all five secondary outcome measures in both CBT groups compared with the waiting list. Conducting exposure in VR was more effective at post-treatment than in vivo on the primary outcome measure and on one secondary measure. Improvements were maintained at the 6-month follow-up. VR was significantly more practical for therapists than in vivo exposure.
Conclusions
Using VR can be advantageous over standard CBT as a potential solution for treatment avoidance and as an efficient, cost-effective and practical medium of exposure.
In Canada, ancillary tests, such as selective four vessels angiography (S4VA), are sometimes necessary for brain death (BD) diagnosis when the clinical exam cannot be completed or confounding factors are present. Recent Canadian guidelines assert that brain death is supported by the absence of arterial blood flow at the surface of the brain and that venous return should not be considered. However, neuropathologic and angiographic studies have suggested that arteries might still be patent in BD patients. Current clinical practices in BD diagnosis following S4VA need to be better understood.
Methods:
We conducted a retrospective study of all S4VA performed for the determination of BD in a level 1 NeuroTrauma centre from 2003 to 2007. The objective of the study was to describe the prevalence of intracranial arterial, capillary (parenchymogram) and venous opacification in our study population. All tests were reviewed independently by two neuroradiologists. Disagreements were resolved by consensus.
Results:
Thirty two patients were declared BD following S4VA during the study period. Nine of these patients (28%) presented some proximal opacification of intracranial arteries (95% CI 15-45%). As opposed, none had a cerebral capillary and deep venous drainage opacification (95% CI 0-10%).
Conclusion:
The absence of cerebral deep venous drainage or parenchymogram might represent a better objective marker of cerebral circulatory arrest for brain death diagnosis when the use of S4VA is required. These findings open the path for further research in enhancing our interpretation of angiographic studies for brain death diagnosis.
We study the numerical approximation of doubly reflected backward stochastic differentialequations with intermittent upper barrier (RIBSDEs). These denote reflected BSDEs in whichthe upper barrier is only active on certain random time intervals. From the point of viewof financial interpretation, RIBSDEs arise as pricing equations of game options withconstrained callability. In a Markovian set-up we prove a convergence rate for atime-discretization scheme by simulation to an RIBSDE. We also characterize the solutionof an RIBSDE as the largest viscosity subsolution of a related system of variationalinequalities, and we establish the convergence of a deterministic numerical scheme forthat problem. Due to the potentially very high dimension of the system of variationalinequalities, this approach is not always practical. We thus subsequently prove aconvergence rate for a time-discretisation scheme by simulation to an RIBSDE.
We present a new analysis and reduction pipeline for the detection of planetary companions using Angular Differential Imaging. The pipeline uses Fourier transforms for image shifting and rotation in order to achieve very low signal loss. Furthermore it is parallelised in order to run on computer clusters of up to 1024 cores. The pipeline was developed in Geneva for the ongoing direct imaging campaign for stars with radial velocity drifts in the HARPS and CORALIE radial-velocity planet-search surveys. In addition to that, a disk mode has been implemented in the context of observations of the protoplanetary disk around HD142527.
Edited by
Catherine Esnouf, Institut National de la Recherche Agronomique (INRA), Paris,Marie Russel, Institut National de la Recherche Agronomique (INRA), Paris,Nicolas Bricas, Centre de Co-opération Internationale en Recherche Agronomique pour le Développement (CIRAD), Paris
This chapter focuses on food systems using an innovative dual approach. First of all, by considering them in interaction with energy and chemical systems within ecosystems, it poses the question of resource allocation (land and biomass). Second, a socioeconomic approach then highlights the diversity of these food systems. Different types of systems co-exist and reflect different ways of producing, processing, distributing and consuming food products. The ‘global’ food system is a constantly changing combination of these different types of systems, all of which influence each other.
Thanks to this dual approach to food systems, new research questions have emerged. New analytical frameworks would enable a clearer understanding of the interconnections between food systems within ecosystems, on the one hand, and their diversity and constant recombination on the other.
Introduction
Referring to the pioneering work of Malassis (1996), Rastoin et al. (2010) defined a food system (FS) as
an interdependent network of stakeholders (companies, financial institutions, public and private organisations) localised in a given geographical area (region, state, multinational region), participating directly or indirectly in the creation of a flow of goods and services geared towards satisfying the food needs of one or more groups of consumers, both locally and outside the area considered.
Buran-Kaya III is a rockshelter located in Crimea (Ukraine). It provides an exceptional stratigraphic sequence extending from the Middle Paleolithic to the Neolithic. Nine Paleolithic layers have been attributed to the Streletskaya or eastern Szeletian, Micoquian, Aurignacian, Gravettian, and Swiderian cultural traditions. Human remains from the richest Gravettian layer (6-1) are radiocarbon dated to 31.9 ka BP, and therefore represent, with Peştera cu Oase (Romania), one of the oldest anatomically modern humans in Europe. The aim of this study is to obtain a controlled stratigraphic sequence of Buran-Kaya III with new 14C dates from faunal and human bones, in their paleoenvironmental context. During our new excavations (2009–2011), sediments, bones, and teeth from the stratigraphical layers were sampled for sedimentological, geochemical, and 14C analyses. Fossil bones from the 2001 excavations were also analyzed. Accelerator mass spectrometry (AMS) 14C dating, including cross-dating, was performed at Groningen, Saclay/Gif-sur-Yvette, and Oxford. Biogeochemical analysis was used to test the integrity of the bone collagen. Dates were modeled using a Bayesian approach. The sedimentological, paleoenvironmental, and chronological data are mutually consistent and show that the Paleolithic human occupations at Buran-Kaya III range from the end of MIS 3 to early MIS 1. These results provide a new chronological and paleoenvironmental framework for the human settlements in eastern Europe during the late Middle and the Upper Paleolithic.