High risk and low prevalence diseases: Mesenteric ischemia.

INTRODUCTION: Mesenteric ischemia is a rare, frequently misdiagnosed, serious condition that carries with it a high rate of morbidity and mortality. OBJECTIVE: This review highlights the pearls and pitfalls of mesenteric ischemia, including presentation, diagnosis, and management in the emergency department (ED) based on current evidence. DISCUSSION: Mesenteric ischemia is an abdominal vascular emergency that includes superior mesenteric arterial embolism, arterial thrombosis, venous mesenteric ischemia, and non-occlusive mesenteric ischemia. It is associated with a variety of risk factors including older age, cardiovascular disease, hypercoagulable state, and end-stage renal disease. The presentation depends on the underlying pathophysiology. While arterial embolic disease may present with sudden, severe pain, the early stages of the disease and other forms can present with vague symptoms, including generalized abdominal pain, weight loss, vomiting, and diarrhea. Laboratory testing can suggest the disease with leukocytosis and elevated lactate, but normal values should not be used to exclude the diagnosis. The imaging modality of choice is triple phase computed tomography with non-contrast, arterial, and delayed phases. The initial ED management includes fluid resuscitation, symptomatic therapy, broad-spectrum antibiotics, and anticoagulation. Emergent consultation with a multidisciplinary team including diagnostic and interventional radiologists and cardiovascular and general surgeons is necessary for definitive treatment. CONCLUSIONS: An understanding of mesenteric ischemia can assist emergency clinicians in diagnosing and managing this disease.

The COVID-19 pandemic and its impact on health experiences of asylum seekers to the United States.

BACKGROUND: The COVID-19 pandemic exacerbated preexisting barriers to accessing healthcare and social services faced by asylum seekers to the United States. This study aimed to uncover the impact of the first year of the COVID-19 pandemic on asylum seekers, including socio-economic stressors and access to medical information, healthcare, and testing. METHOD: We conducted 15 semi-structured, in-depth interviews with adult asylum seekers to the U.S. and systematically analyzed the resulting transcripts using a consensual qualitative research approach. RESULTS: The transcripts yielded six domains: (1) knowledge and understanding of COVID-19; (2) attitudes and practices relating to COVID-19 precautions; (3) experience of COVID-19 symptoms; (4) current physical and mental health; (5) access to and interaction with health care; (6) discrimination based on asylum status. CONCLUSIONS: Although participants had knowledge about COVID-19's communicability and regularly used masks, their living conditions frequently hindered their ability to quarantine and isolate, and their lack of insurance was often a deterrent to them seeking medical care. Notably, immigration status was not a significant factor discouraging participants from seeking care during the pandemic. The findings build on existing knowledge about this community and may help define areas where support and services can be expanded in current and future pandemics.

Utility of measuring serum creatinine to detect renal compromise in ED patients receiving IV contrast-enhanced CT scan.

OBJECTIVE: The objectives of this study are to determine the efficacy of a roster of clinical factors in identifying risk for renal insufficiency in emergency department (ED) patients requiring intravenous contrast-enhanced CT scan (IVCE-CT) and to help mitigate potential for developing contrast-induced nephropathy (CIN). METHODS: A review was conducted of consecutive ED patients who received IVCE-CT during a 4-month period in our urban ED. The values of ED serum creatinine (SCr) performed were tabulated. The medical records of all patients with an elevated SCr (> 1.4 mg/dL) were reviewed to determine and correlate the presence of clinical risk factors for underlying renal insufficiency. RESULTS: During the 4-month study period, there were 2260 consecutive cases who received IVCE-CT; of these, 2250 (99.6%) had concomitant measurement of SCr. Elevated SCr occurred in 141 patients (6.2%); of these, 75 had a SCr > 2 mg/dL. In all, 139/141 (98.6%) with an elevated SCr had an underlying chronic or acute medical condition identified by medical record review which potentially compromised renal function, including chronic renal disease, diabetes mellitus, HIV infection, cancer, hypertension, congestive heart failure, sepsis/septic shock, chronic alcoholism, and sickle cell disease. Two patients with no identified risk factor each had (mildly) elevated SCr; both had a normal SCr measured post-CT scan. The total cost of performing serum basic metabolic panel to measure SCr in all patients during the 4-month study period was $94,500. CONCLUSIONS: Elevated SCr is rarely present in ED patients without recognized risk factors who receive IVCE-CT scan. The vast majority with underlying renal insufficiency are readily identified by a review of the patient's medical history and/or clinical findings. Routine SCr measurement on all ED patients regardless of risk stratification prior to IVCE imaging is neither time nor cost-effective.

Asylum seekers and the role of the acute care physician.

There has been a recent influx of migrants and asylum seekers to the United States. They often arrive with poor social support and an inability to access reliable health care. This can lead to overutilization of emergency departments (ED) while awaiting legal proceedings. With asylum seekers in all 50 states, it is important for emergency physicians (EP) to understand the barriers to care and difficulties asylum seekers face, and to gain tools to improve both migrants' and community health. Migration and experiences within the United States can worsen pre-existing health conditions. EPs are uniquely positioned to screen for acute pathology and link people to care. Psychiatric illnesses may present differently in asylum seekers. EPs must understand the sequalae of trauma to address it. EPs must also be aware of legal protections for asylum seekers to care for these patients, and recognize challenges faced by the population to mitigate health disparities.

The impact of immigration detention on the health of asylum seekers during the COVID-19 pandemic.

COVID-19 disproportionately affects racial and ethnic minority groups as well as people in jails and immigration detention centers in the United States. Between April and August of 2020, the mean monthly COVID-19 case ratio for ICE detainees was 13.4 times that of the general U.S. population. This study aims to understand the experiences of detained asylum seekers during the pandemic and to provide insight into COVID-19's impact on this population's health. This qualitative study employed first-person, in-depth narratives obtained from 12 asylum seekers, all of whom were detained in immigration detention centers or prisons during the initial surge of the COVID-19 pandemic and were subsequently released. Detained asylum seekers reported inadequate medical care, obstacles to receiving care, an inability to social distance, poor hygiene, restricted movement, and a lack of infection control-- all which increased their risk of contracting and spreading COVID-19 and exacerbated health inequalities brought to the forefront by the pandemic. Advocating for improved disease prevention and screening, prompt access to health care and treatment, cohorting of infectious cases, and community alternatives to detention to decrease the detained immigrant population sizes are crucial to halt communicability of the virus and its subsequent morbidity and mortality in this vulnerable population.

An Ultraconserved Brain-Specific Enhancer Within ADGRL3 (LPHN3) Underpins Attention-Deficit/Hyperactivity Disorder Susceptibility.

BACKGROUND: Genetic factors predispose individuals to attention-deficit/hyperactivity disorder (ADHD). Previous studies have reported linkage and association to ADHD of gene variants within ADGRL3. In this study, we functionally analyzed noncoding variants in this gene as likely pathological contributors. METHODS: In silico, in vitro, and in vivo approaches were used to identify and characterize evolutionary conserved elements within the ADGRL3 linkage region (~207 Kb). Family-based genetic analyses of 838 individuals (372 affected and 466 unaffected patients) identified ADHD-associated single nucleotide polymorphisms harbored in some of these conserved elements. Luciferase assays and zebrafish green fluorescent protein transgenesis tested conserved elements for transcriptional enhancer activity. Electromobility shift assays were used to verify transcription factor-binding disruption by ADHD risk alleles. RESULTS: An ultraconserved element was discovered (evolutionary conserved region 47) that functions as a transcriptional enhancer. A three-variant ADHD risk haplotype in evolutionary conserved region 47, formed by rs17226398, rs56038622, and rs2271338, reduced enhancer activity by 40% in neuroblastoma and astrocytoma cells (pBonferroni < .0001). This enhancer also drove green fluorescent protein expression in the zebrafish brain in a tissue-specific manner, sharing aspects of endogenous ADGRL3 expression. The rs2271338 risk allele disrupts binding of YY1 transcription factor, an important factor in the development and function of the central nervous system. Expression quantitative trait loci analysis of postmortem human brain tissues revealed an association between rs2271338 and reduced ADGRL3 expression in the thalamus. CONCLUSIONS: These results uncover the first functional evidence of common noncoding variants with potential implications for the pathology of ADHD.