Publications by authors named "Guy Lumley"

Hyperkalemia, an elevated blood potassium concentration exceeding 5.0 mEq/L, is associated with adverse outcomes and is frequently observed in hospitalized patients. Drug-induced hyperkalemia accounts for a significant proportion of cases, with heparin, commonly used for venous thrombosis prevention, suspected to contribute, though less recognized than other heparin-related side effects.

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Use of telemedicine has increased following the Coronavirus 2019 (COVID-19) pandemic; however, much of the literature is based in outpatient settings. There have also historically been concerns about the efficacy of telemedicine in older patients. This service evaluation implemented virtual consultations into the ward-round setting, using a 'robot' device.

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fMRI studies of aging have revealed increased blood oxygenation level dependent (BOLD) response to tasks of executive function with advancing age, which is generally interpreted as increased neural activity. However, changes in the cerebrovascular system with age can alter the BOLD signal, complicating this interpretation. Arterial spin labeling (ASL) allows simultaneous acquisition of BOLD and cerebral blood flow (CBF) information and can be used to quantify the component parts of the BOLD signal.

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