Hypoxia-ischemia produces focal disruption of glutamate receptors in developing brain

We examined the impact of a perinatal hypoxic-ischemic insult on the distribution of glutamate receptors in developing brain. We used a well characterized rodent model for perinatal hypoxic-ischemic encephalopathy, unilateral carotid artery occlusion followed by exposure to 8% oxygen for 2.5 h in 7-day-old rat pups. This preparation results in focal neuronal damage in striatum, hippocampus, and cortex ipsilateral to ligation. Alterations in the regional distribution of glutamate binding in the first 24 h after the insult were assessed with quantitative in vitro [3H]glutamate autoradiography. In lesioned animals, we found progressive selective reductions in [3H]glutamate binding in forebrain ipsilateral to ligation in regions destined for neuronal damage. The earliest and most prominent unilateral reductions in binding were noted in the dentate gyrus of hippocampus (-45 +/- 9%, compared with contralateral hemisphere at 24 h). Acute reductions in specific glutamate binding appear to be a sensitive marker for hypoxic-ischemic neuronal damage in the immature brain. These observations suggest that neurons bearing glutamate receptors may be particularly susceptible to hypoxic-ischemic injury.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/26646/1/0000188.pd

Medical decision making about long-term artificial nutrition after severe stroke: a case report

Choosing to use a percutaneous endoscopic gastrostomy (PEG tube) for long term artificial nutrition in the setting of inadequate oral intake after stroke is complex because the decision must be made in a relatively short amount of time and prognosis is often uncertain. This case study utilized interviews with attending and resident neurologists, and surrogate medical decision makers in order to examine how neurologists and surrogate medical decision makers approached the decision to either receive a PEG tube or pursue comfort measures after severe stroke in two patients. Although these two patients presented with similar clinical characteristics and faced similar medical decisions, different decisions regarding PEG tube placement were made. Major challenges included physicians who did not agree on prognosis and surrogates who did not agree on whether to place a PEG tube. These cases demonstrate the importance of the role of the surrogate medical decision maker and the necessity of physicians and surrogate medical decision makers approaching the complex decision of PEG tube placement after stroke together. Additionally, these cases highlight the differing views on what defines a good quality of life and show the vital importance of high-quality goals of care conversations about prognosis and quality of life when deciding whether to place a PEG tube after severe stroke

A preliminary examination of factors affecting female selection of an oviposition site in the damselfly Calopteryx maculata.

http://deepblue.lib.umich.edu/bitstream/2027.42/53568/1/2004.pdfDescription of 2004.pdf : Access restricted to on-site users at the U-M Biological Station

Code status orders in hospitalized patients with COVID-19

Background: The COVID-19 pandemic created complex challenges regarding the timing and appropriateness of do-not-attempt cardiopulmonary resuscitation (DNACPR) and/or Do Not Intubate (DNI) code status orders. This paper sought to determine differences in utilization of DNACPR and/or DNI orders during different time periods of the COVID-19 pandemic, including prevalence, predictors, timing, and outcomes associated with having a documented DNACPR and/or DNI order in hospitalized patients with COVID-19. Methods: A cohort study of hospitalized patients with COVID-19 at two hospitals located in the Midwest. DNACPR code status orders including, DNI orders, demographics, labs, COVID-19 treatments, clinical interventions during hospitalization, and outcome measures including mortality, discharge disposition, and hospice utilization were collected. Patients were divided into two time periods (early and late) by timing of hospitalization during the first wave of the pandemic (March–October 2020). Results: Among 1375 hospitalized patients with COVID-19, 19% (n = 258) of all patients had a documented DNACPR and/or DNI order. In multivariable analysis, age (older) p = 0.01 (early cohort 5 days versus late cohort 2 days). In-hospital mortality did not differ between cohorts among patients with DNACPR orders, p = 0.80. Conclusions: There was a higher prevalence of DNACPR and/or DNI orders and these orders were written earlier in the hospital course for patients hospitalized early in the pandemic versus later despite similarities in clinical characteristics and medical interventions. Changes in clinical care between cohorts may be due to fear of resource shortages and changes in knowledge about COVID-19

Palliative and End-of-Life Care After Severe Stroke.

Background and Objectives The distinct illness trajectory after acute ischemic stroke demands a better understanding of the utilization of palliative care consultations (PCC) for this patient cohort. This study sought to determine the prevalence, predictors, and outcomes associated with PCC for patients hospitalized with severe ischemic stroke. Methods This multicenter cohort study was conducted at four hospitals (2 comprehensive and 2 primary stroke centers) between January, 2016 and December, 2019. We included all patients with a discharge diagnosis of ischemic stroke and an initial National Institutes of Health Stroke Scale (NIHSS) of 10 or greater. We compared patient sociodemographic, clinical and care characteristics as well as hospital outcomes between patients who did and did not receive PCC. Results The study included 1297 patients hospitalized with severe ischemic stroke. PCC occurred for 20% of all patients and this proportion varied across institutions from 11.9% to 43%. Less than half (43%) of patients who died in the hospital. In multivaraible analysis, PCC was less likely in female patients (OR .76, 95% CI .59, .99, P=0.04) but more likely in patients with higher NIHSS (OR1.95, 95% CI 1,13, 3.37, P=0.02). Patients with PCC had higher rates of moving to a plan focused on comfort measures (CMO) (P<0.01) and removal of artificial nutrition as part of a move to CMO (P<0.01). In a sub analysis of patients who died in the hospital and received PCC, patients who died on or before hospital day 3 were less likely to receive PCC than patients who died on or after hospital day 4 (24% v. 51%) (P=<0.01). Conclusions Most patients with severe stroke do not receive PCC, even among those who experience in-hospital death. The results of this study indicate there are missed opportunities for PCC to help reduce suffering after severe stroke

Advance Care Planning in Nursing Home Patients With Dementia: A Qualitative Interview Study Among Family and Professional Caregivers

Item does not contain fulltextOBJECTIVE: The aim of this study was to describe the process of advance care planning (ACP) and to explore factors related to the timing and content of ACP in nursing home patients with dementia, as perceived by family, physicians, and nurses. DESIGN: A qualitative descriptive study. METHODS: A total of 65 in-depth qualitative interviews were held with families, on-staff elderly care physicians, and nurses of 26 patients with dementia who died in the Dutch End Of Life in Dementia (DEOLD) study. Interviews were coded and analyzed to find themes. RESULTS: Family, nurses, and physicians of all patients indicated they had multiple contact moments during nursing home stay in which care goals and treatment decisions were discussed. Nearly all interviewees indicated that physicians took the initiative for these ACP discussions. Care goals discussed and established during nursing home stay and the terminology to describe care goals varied between facilities. Regardless of care goals and other factors, cardiopulmonary resuscitation (CPR) and hospitalization were always discussed in advance with family and commonly resulted in a do-not-resuscitate (DNR) and a do-not-hospitalize (DNH) order. The timing of care planning discussions about other specific treatments or conditions and the content of treatment decisions varied. The factors that emerged from the interviews as related to ACP were general strategies that guided physicians in initiating ACP discussions, patient's condition, wishes expressed by patient or family, family's willingness, family involvement, continuity of communication, consensus with or within family, and general nursing home policy. Two influential underlying strategies guided physicians in initiating ACP discussions: (1) wait for a reason to initiate discussions, such as a change in health condition and (2) take initiative to discuss possible treatments (actively, including describing scenarios). CONCLUSIONS: ACP is a multifactorial process, which may lean on professional caregivers' guidance. The most acute decisions are covered in advance, but a responsive as well as a proactive style is seen with other treatment decisions. Further research is needed to increase understanding of whether and how the physicians' strategies affect care processes and outcomes