Acute and Critical Care

Original Articles

Neurology
The effects of hypomagnesemia on delirium in middle-aged and older adult patients admitted to medical intensive care units: Joong-Yub Kim, Hyo Jin Lee, Hong Yeul Lee, Sang-Min Lee, Jinwoo Lee, Tae Yun Park; Acute Crit Care. 2022;37(3):407-414. Published online July 5, 2022; DOI: https://doi.org/10.4266/acc.2022.00164

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Background
In critically ill patients, the most common manifestation of brain dysfunction is delirium, which is independently associated with higher morbidity and mortality. While electrolyte imbalance is one of the precipitating factors, the impact of hypomagnesemia on the incidence of delirium remains unknown.
Methods
We retrospectively analyzed patients admitted to the medical intensive care unit (ICU) of a tertiary referral center between January and June 2020. Patients with ICU stay ≥48 hours and aged 40–85 years were included. The primary outcome was cumulative incidence of delirium in the ICU. Patients were divided into two groups based on serum magnesium level at ICU admission. Multivariable Cox proportional hazards regression analysis was performed, and covariates were selected using the least absolute shrinkage and selection operator (LASSO) method.
Results
A total of 109 patients included 43 (39.4%) women and had a median age of 69.0 years (interquartile range [IQR], 60.0–76.0 years). The median magnesium level was 1.7 mg/dl (IQR, 1.5–1.9 mg/dl), and the cumulative incidence of delirium was 32.1% (35 patients). Hypomagnesemia was independently associated with delirium (adjusted hazard ratio [aHR], 2.12; 95% confidence interval [CI], 1.03–4.38), along with prior use of immunosuppressants (aHR, 3.08; 95% CI, 1.46–6.48) or benzodiazepines (aHR, 4.02; 95% CI, 1.54–10.50), body mass index (aHR, 0.93; 95% CI, 0.84–1.02), and alcohol history (aHR, 1.68; 95% CI, 0.74–3.80).
Conclusions
In critically ill adults, hypomagnesemia increases the risk of delirium by more than two-fold compared to patients with normal magnesium level.

Citations

Citations to this article as recorded by

Hypomagnesemia and incident delirium in hospitalized older persons
Virginia Boccardi, Sara Ercolani, Rocco Serra, Valentina Bubba, Alessandro Piccolo, Michela Scamosci, Alfredo Villa, Carmelinda Ruggiero, Patrizia Mecocci
Aging Clinical and Experimental Research.2023;[Epub] CrossRef

Neurology
Association of natural light exposure and delirium according to the presence or absence of windows in the intensive care unit: Hyo Jin Lee, Eunhye Bae, Hong Yeul Lee, Sang-Min Lee, Jinwoo Lee; Acute Crit Care. 2021;36(4):332-341. Published online November 26, 2021; DOI: https://doi.org/10.4266/acc.2021.00556

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5 Citations

Abstract PDF Supplementary Material

Background
Patients in the intensive care unit (ICU) have increased risks of delirium, which is associated with worse outcomes. As pharmacologic treatments for delirium are ineffective, prevention is important. Nonpharmacologic preventive strategies include exposure to natural light and restoring circadian rhythm. We investigated the effect of exposure to natural light through windows on delirium in the ICU.
Methods
This retrospective cohort study assessed all patients admitted to the medical ICU of a university-affiliated hospital between January and June 2020 for eligibility. The ICU included 12 isolation rooms, six with and six without windows. Patients with ICU stays of >48 hours were included and were divided into groups based on their admission to a single room with (window group) or without windows (windowless group). The primary outcome was the cumulative incidence of delirium. The secondary outcomes were the numbers of delirium- and mechanical ventilation-free days, ICU and hospital length of stay, and in-ICU and 28-day mortalities.
Results
Of the 150 included patients (window group: 83 [55.3%]; windowless group: 67 [44.7%]), the cumulative incidence of delirium was significantly lower in the window group than in the windowless group (21.7% vs. 43.3%; relative risk, 1.996; 95% confidence interval [CI], 1.220–3.265). Other secondary outcomes did not differ between groups. Admission to a room with a window was independently associated with a decreased risk of delirium (adjusted odds ratio, 0.318; 95% CI, 0.125–0.805).
Conclusions
Exposure to natural light through windows was associated with a lower incidence of delirium in the ICU.

Citations

Citations to this article as recorded by

Four Decades of Intensive Care Unit Design Evolution and Thoughts for the Future
Neil A. Halpern, Elizabeth Scruth, Michelle Rausen, Diana Anderson
Critical Care Clinics.2023;[Epub] CrossRef
2021 KSCCM clinical practice guidelines for pain, agitation, delirium, immobility, and sleep disturbance in the intensive care unit
Yijun Seo, Hak-Jae Lee, Eun Jin Ha, Tae Sun Ha
Acute and Critical Care.2022; 37(1): 1. CrossRef
Post-acute delirium of COVID-19 infection: Report of two cases
Dai-Chun Chi, Chih-Pang Chu, TienWei Yang, Hu-Ming Chang
Taiwanese Journal of Psychiatry.2022; 36(1): 44. CrossRef
The future of intensive care: delirium should no longer be an issue
Katarzyna Kotfis, Irene van Diem-Zaal, Shawniqua Williams Roberson, Marek Sietnicki, Mark van den Boogaard, Yahya Shehabi, E. Wesley Ely
Critical Care.2022;[Epub] CrossRef
The effects of hypomagnesemia on delirium in middle-aged and older adult patients admitted to medical intensive care units
Joong-Yub Kim, Hyo Jin Lee, Hong Yeul Lee, Sang-Min Lee, Jinwoo Lee, Tae Yun Park
Acute and Critical Care.2022; 37(3): 407. CrossRef

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