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Updated: Feb 12, 2026

Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
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Hypomagnesemia in critically ill patients.

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  • 11Department of Microbiology, Førde Hospital, Førde, Norway.

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PubMed
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Hypomagnesemia, or low magnesium levels, is common in hospitalized patients and can lead to fatal complications. Early treatment is crucial, even if serum magnesium appears normal.

Keywords:
ArrhythmiaCalciumCritical illnessIntensive care unitMagnesiumPotassium

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Area of Science:

  • Biochemistry
  • Critical Care Medicine
  • Electrolyte Balance

Background:

  • Magnesium (Mg) is vital for numerous bodily functions.
  • Hypomagnesemia is prevalent in hospitalized, particularly critically ill, patients.
  • Untreated hypomagnesemia can result in severe, life-threatening complications and increased mortality.

Purpose of the Study:

  • To review the challenges in diagnosing and treating magnesium deficiency in critically ill patients.
  • To highlight the association between hypomagnesemia and adverse outcomes.
  • To emphasize the need for further research into magnesium replacement strategies.

Main Methods:

  • Review of existing literature on magnesium status assessment and treatment in critically ill patients.
  • Discussion of common causes of Mg deficiency, including gastrointestinal and renal disorders.
  • Evaluation of diagnostic methods such as serum Mg and Mg tolerance tests.

Main Results:

  • Mg deficiency can lead to secondary hypokalemia and hypocalcemia.
  • Severe neuromuscular and cardiovascular symptoms are associated with hypomagnesemia.
  • Current methods for assessing Mg status are limited.

Conclusions:

  • Treatment for magnesium deficiency should be considered in at-risk patients, even with normal serum Mg levels.
  • Early diagnosis and intervention are critical for improving outcomes in hypomagnesemia.
  • Further clinical trials are needed to optimize magnesium replacement therapies.