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Micronutrients in critical illness

R H Demling1, M A DeBiasse

  • 1Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.

Critical Care Clinics
|July 1, 1995
PubMed
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Micronutrients, including vitamins and trace elements, are crucial for critical illness survival, supporting metabolic processes and immune function. Deficiencies are common in critically ill patients, necessitating increased intake, preferably enterally, to improve outcomes.

Area of Science:

  • Clinical Nutrition
  • Critical Care Medicine
  • Biochemistry

Background:

  • Micronutrients (vitamins and trace elements) are vital for metabolic processes essential for survival during critical illness.
  • Systemic inflammation in critically ill patients alters oxidative phosphorylation and increases the need for antioxidant protection.
  • Wound healing and immune function are significantly dependent on adequate vitamin and trace element levels.

Purpose of the Study:

  • To highlight the critical role of micronutrients in the metabolic processes of critically ill patients.
  • To emphasize the importance of addressing micronutrient deficiencies in critical care.
  • To discuss optimal routes and considerations for micronutrient administration in critically ill patients.

Main Methods:

Related Experiment Videos

  • Review of the physiological roles of vitamins and trace elements in critical illness.
  • Analysis of factors contributing to micronutrient deficiency in critically ill populations.
  • Discussion of enteral and parenteral routes for micronutrient delivery and associated dosing considerations.

    • Main Results:

    • Vitamins are essential for oxidative phosphorylation and protection against oxidants.
    • Trace elements provide direct antioxidant activity and act as cofactors for antioxidant enzymes.
    • Critically ill patients frequently develop deficiencies due to decreased intake and increased requirements, often needing intakes many times the Recommended Dietary Allowance (RDA).

    Conclusions:

    • Adequate micronutrient levels are paramount for optimizing nutritional management and overall care of critically ill patients.
    • Attention to micronutrients is essential for promoting positive patient outcomes and reducing complications.
    • Enteral nutrition is preferred for micronutrient delivery, though parenteral routes are viable when necessary, albeit with less clear dosing guidelines.