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Energy‐autonomous wearable systems and wearable microgrids have been a focus of developing the next‐generation wearable electronics due to their ability to harvest energy and to fully support the sustainable operation of wearable electronics. However, existing bioenergy harvesters require complex and low‐efficiency voltage regulation circuitry and have not achieved reliable extended operation and energy storage. In this work, the first example of integrating sweat lactate biofuel cells with a rechargeable Zn–AgCl battery into a bioenergy module for regulation‐free, high‐efficiency, extended biochemical energy harvesting and storage is demonstrated. The integrated bioenergy module is able to operate at its best efficiency due to their matching operating potentials and is characterized by robust mechanical durability enduring over 1000 cycles of repeated tensile deformation, as well as the outstanding long‐term autonomous operation that harvest 2.9 J of energy overnight from 20 min of exercise without measurable self‐discharge. A fully integrated wearable electronic skin patch, powered by two such bioenergy modules, is developed to wirelessly perform continuous sweat pH, ascorbic acid, and lactate sensing. The presented bioenergy module, adapting the wearable microgrid design considerations, delivers a practical, high‐efficiency, and reliable solution for next‐generation wearable electronics that features compatible form factors, commensurate performance, and complementary characteristics.

Suicide by self-poisoning is a common cause of death, especially in the younger population. More specifically, hair-dye poisoning is being increasingly used for suicide. Paraphenylenediamine (PPD), also known as "Kala pathar", is a highly toxic ingredient present in hair-dye that can cause death. Therefore, this study is designed to assess the demographics, clinical features, laboratory findings, and outcomes of PPD poisoning in patients admitted to the National Poison Control Center in Karachi, Pakistan. Materials and methodsWe conducted a prospective study for a period of six months at the National Poison Control Center, Karachi, Pakistan. A total of eight patients with PPD poisoning with no cardiac, liver, or renal co-morbidities were included in this study. The demographic characteristics, clinical features, laboratory findings, mode of intoxication, and route of intoxication were noted in a proforma. Furthermore, hospitalization time, tracheostomy status, mechanical ventilation status, and mortality rates were also recorded. For continuous variables, the means and SDs were calculated. Whereas for categorical data, percentages were calculated.

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Background and aimsSARS-CoV-2 and consequent pandemic has presented unique challenges. Beyond the direct COVID-related mortality in those with liver disease, we sought to determine the effect of lockdown on people with liver disease in Scotland. The effect of lockdown on those with alcohol-related disease is of interest; and whether there were associated implications for a change in alcohol intake and consequent presentations with decompensated disease.MethodsWe performed a retrospective analysis of patients admitted to seven Scottish hospitals with a history of liver disease between 1 April and 30 April 2020 and compared across the same time in 2017, 2018 and 2019. We also repeated an intermediate assessment based on a single centre to examine for delayed effects between 1 April and 31 July 2020.ResultsWe found that results and outcomes for patients admitted in 2020 were similar to those in previous years in terms of morbidity, mortality, and length of stay. In the Scotland-wide cohort: admission MELD (Model for End-stage Liver Disease) (16 (12–22) vs 15 (12–19); p=0.141), inpatient mortality ((10.9% vs 8.6%); p=0.499) and length of stay (8 days (4–15) vs 7 days (4–13); p=0.140). In the Edinburgh cohort: admission MELD (17 (12–23) vs 17 (13–21); p=0.805), inpatient mortality ((13.7% vs 10.1%; p=0.373) and length of stay (7 days (4–14) vs 7 days (3.5–14); p=0.525)).ConclusionThis assessment of immediate and medium-term lockdown impacts on those with chronic liver disease suggested a minimal effect on the presentation of decompensated liver disease to secondary care.