Background Workplace violence (WPV) is an important challenge faced by health care personnel in the emergency department (ED). Study Objectives To determine the prevalence and nature of WPV reported by physicians and nurses working in the EDs of four of the largest tertiary care hospitals in Karachi, Pakistan and to understand the mental health impact of experiencing WPV. Methods This cross-sectional survey was conducted between September and November 2008 using a widely used questionnaire developed by the World Health Organization. Overall, 266 (86% response rate) questionnaires were included in this study. Results A total of 44 (16.5%) physicians and nurses said they had been physically attacked, and 193 (72.5%) said that they had experienced verbal abuse in the last 12 months. Among those who reported physical attack, 29.6% reported that the last incident involved a weapon, and in 64% of cases the attacker was a patient’s relative. Eighty-six percent thought that the last attack could have been prevented, and 64% said that no action was taken against the attacker. After adjusting for covariates, physicians were less likely than nurses to report physical attack (odds ratio [OR] 0.46; 95% confidence interval [CI] 0.2–1.0), and personnel with greater work experience (OR 4.8; 95% CI 2.0–11.7) and those who said that there were procedures to report WPV in their workplace (OR 3.2; 95% CI 1.6–6.5) were more likely to report verbal abuse. WPV was associated with mental health effects in the form of bothersome memories, super-alertness, and feelings of avoidance and futility. Conclusion WPV is an important challenge in the EDs of large hospitals in Karachi. A majority of respondents feel that WPV is preventable, but only a minority of attackers face consequences.

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Background and objectives Rapid correction of severe hyponatremia can result in serious neurologic complications, including osmotic demyelination. Few data exist on incidence and risk factors of rapid correction or osmotic demyelination. Design, setting, participants, & measurements In a retrospective cohort of 1490 patients admitted with serum sodium ,120 mEq/L to seven hospitals in the Geisinger Health System from 2001 to 2017, we examined the incidence and risk factors of rapid correction and osmotic demyelination. Rapid correction was defined as serum sodium increase of .8 mEq/L at 24 hours. Osmotic demyelination was determined by manual chart review of all available brain magnetic resonance imaging reports. Results Mean age was 66 years old (SD=15), 55% were women, and 67% had prior hyponatremia (last outpatient sodium ,135 mEq/L). Median change in serum sodium at 24 hours was 6.8 mEq/L (interquartile range, 3.4-10.2), and 606 patients (41%) had rapid correction at 24 hours. Younger age, being a woman, schizophrenia, lower Charlson comorbidity index, lower presentation serum sodium, and urine sodium ,30 mEq/L were associated with greater risk of rapid correction. Prior hyponatremia, outpatient aldosterone antagonist use, and treatment at an academic center were associated with lower risk of rapid correction. A total of 295 (20%) patients underwent brain magnetic resonance imaging on or after admission, with nine (0.6%) patients showing radiologic evidence of osmotic demyelination. Eight (0.5%) patients had incident osmotic demyelination, of whom five (63%) had beer potomania, five (63%) had hypokalemia, and seven (88%) had sodium increase .8 mEq/L over a 24-hour period before magnetic resonance imaging. Five patients with osmotic demyelination had apparent neurologic recovery. Conclusions Among patients presenting with severe hyponatremia, rapid correction occurred in 41%; nearly all patients with incident osmotic demyelination had a documented episode of rapid correction.

As the prevalence of obesity continues to increase worldwide, an increasing number of people are at risk for kidney disease. Thus, there is a critical need to understand how best to assess kidney function in this population, and several challenges exist. The convention of indexing glomerular filtration rate (GFR) to body surface area (BSA) attempts to normalize exposure to metabolic wastes across populations of differing body size. In obese individuals, this convention results in a significantly lower indexed GFR than unindexed GFR, which has practical implications for drug dosing. Recent data suggest that "unindexing" estimated GFR (multiplying by BSA/1.73 m) for drug dosing may be acceptable, but pharmocokinetic data to support this practice are lacking. Beyond indexing, biomarkers commonly used for estimating GFR may induce bias. Creatinine is influenced by muscle mass, whereas cystatin C correlates with fat mass, both independent of kidney function. Further research is needed to evaluate the performance of estimating equations and other filtration markers in obesity, and determine whether unindexed GFR might better predict optimal drug dosing and clinical outcomes in patients whose BSA is very different than the conventional normalized value of 1.73 m.