Photoproduction of mesons off nuclei

Recent results for the photoproduction of mesons off nuclei are reviewed. These experiments have been performed for two major lines of research related to the properties of the strong interaction. The investigation of nucleon resonances requires light nuclei as targets for the extraction of the isospin composition of the electromagnetic excitations. This is done with quasi-free meson photoproduction off the bound neutron and supplemented with the measurement of coherent photoproduction reactions, serving as spin and/or isospin filters. Furthermore, photoproduction from light and heavy nuclei is a very efficient tool for the study of the interactions of mesons with nuclear matter and the in-medium properties of hadrons. Experiments are currently rapidly developing due to the combination of high quality tagged (and polarized) photon beams with state-of-the-art 4pi detectors and polarized targets

Goal-Concordant Care After Severe Acute Brain Injury.

Background: Patients with severe acute brain injury (SABI) lack decision-making capacity, calling on families and clinicians to make goal-concordant decisions, aligning treatment with patient's presumed goals-of-care. Using the family perspective, this study aimed to (1) compare patient's goals-of-care with the care they were receiving in the acute setting, (2) identify patient and family characteristics associated with goal-concordant care, and (3) assess goals-of-care 6 months after SABI. Methods: Our cohort included patients with SABI in our Neuro-ICU and a Glasgow Coma Scale Score <12 after day 2. Socio-demographic and clinical characteristics were collected through surveys and chart review. At enrollment and again at 6 months, each family was asked if the patient would prefer medical care focused on extending life vs. care focused on comfort and quality of life, and what care the patient is currently receiving. We used multivariate regression to examine the characteristics associated with (a) prioritized goals (comfort/extending life/unsure) and (b) goal concordance. Results: Among 214 patients, families reported patients' goals-of-care to be extending life in 118 cases (55%), comfort in 71 (33%), and unsure for 25 (12%), while care received focused on extending life in 165 cases (77%), on comfort in 23 (11%) and families were unsure in 16 (7%). In a nominal regression model, prioritizing comfort over extending life was significantly associated with being non-Hispanic White and having worse clinical severity. Most patients who prioritized extending life were receiving family-reported goal-concordant care (88%, 104/118), while most of those who prioritized comfort were receiving goal-discordant care (73%, 52/71). The only independent association for goal concordance was having a presumed goal of extending life at enrollment (OR 23.62, 95% CI 10.19-54.77). Among survivors at 6 months, 1 in 4 family members were unsure about the patient's goals-of-care. Conclusion: A substantial proportion of patients are receiving unwanted aggressive care in the acute setting after SABI. In the first days, such aggressive care might be justified by prognostic uncertainty. The high rate of families unsure of patient's goals-of-care at 6 months suggests an important need for periodic re-evaluation of prognosis and goals-of-care in the post-acute setting

Adapting to a New Normal After Severe Acute Brain Injury: An Observational Cohort Using a Sequential Explanatory Design.

Treatment decisions following severe acute brain injury need to consider patients' goals-of-care and long-term outcomes. Using family members as respondents, we aimed to assess patients' goals-of-care in the ICU and explore the impact of adaptation on survivors who did not reach the level of recovery initially considered acceptable. Prospective, observational, mixed-methods cohort study. Comprehensive stroke and level 1 trauma center in Pacific Northwest United States. Family members of patients with severe acute brain injury in an ICU for greater than 2 days and Glasgow Coma Scale score less than 12. At enrollment, we asked what level of physical and cognitive recovery the patient would find acceptable. At 6 months, we assessed level of recovery through family surveys and chart review. Families of patients whose outcome was below that considered acceptable were invited for semistructured interviews, examined with content analysis. For 184 patients, most family members set patients' minimally acceptable cognitive recovery at "able to think and communicate" or better (82%) and physical recovery at independence or better (66%). Among 170 patients with known 6-month outcome, 40% had died in hospital. Of 102 survivors, 33% were able to think and communicate, 13% were independent, and 10% died after discharge. Among survivors whose family member had set minimally acceptable cognitive function at "able to think and communicate," 64% survived below that level; for those with minimally acceptable physical function at independence, 80% survived below that. Qualitative analysis revealed two key themes: families struggled to adapt to a new, yet uncertain, normal and asked for support and guidance with ongoing treatment decisions. Six months after severe acute brain injury, most patients survived to a state their families initially thought would not be acceptable. Survivors and their families need more support and guidance as they adapt to a new normal and struggle with persistent uncertainty