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Hypophosphataemia in Critical Illness: A Narrative Review
Mahesh Ramanan1,2,3,4, Alexis Tabah1,5, Julia Affleck2
1Faculty of Health, Queensland University of Technology, Brisbane, QLD 4000, Australia.
Journal of Clinical Medicine
|December 17, 2024
Summary
Hypophosphatemia, low phosphate levels, is common in intensive care unit (ICU) patients. While phosphate repletion is safe, its patient benefits in critical illness remain uncertain, necessitating further research.
Area of Science:
- Biochemistry
- Critical Care Medicine
- Clinical Nutrition
Background:
- Phosphate is a crucial intracellular anion vital for cellular functions.
- Hypophosphatemia, a common electrolyte derangement in critically ill patients, affects up to 75% of Intensive Care Unit (ICU) admissions.
- Existing literature on the association between hypophosphatemia and ICU outcomes is conflicting and prone to confounding factors.
Purpose of the Study:
- To review the management of hypophosphatemia in critically ill patients.
- To summarize current best practices for phosphate repletion in the ICU.
- To identify key research priorities regarding the clinical utility of correcting hypophosphatemia.
Main Methods:
- Literature review of hypophosphatemia in critical illness.
- Analysis of current guidelines and evidence for phosphate administration (enteral and intravenous).
- Discussion of patient-centered outcomes and research gaps.
Main Results:
- Phosphate administration via enteral and intravenous routes is considered safe in the ICU setting.
- The clinical benefits and potential harms of correcting hypophosphatemia, especially mild cases, are not well-established.
- Significant confounding exists in studies linking hypophosphatemia to ICU outcomes.
Conclusions:
- While safe, the definitive patient-centered benefits of phosphate repletion in hypophosphatemia during critical illness require further investigation.
- Uncertainty remains regarding the optimal management strategy for mild or low-normal phosphate levels in ICU patients.
- Further research is essential to clarify the role and efficacy of phosphate supplementation in improving outcomes for critically ill individuals.
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