Zinc and total parenteral nutrition.

Area of Science:

• Clinical Nutrition
• Trace Element Metabolism

Background:

• Trace element requirements are critical for patient health.
• Total parenteral nutrition (TPN) can lead to deficiencies if not properly supplemented.
• Zinc is an essential trace element with specific nutritional requirements.

Purpose of the Study:

• To evaluate the necessity of zinc supplementation in patients receiving TPN.
• To compare the efficacy of different zinc supplementation methods.
• To assess the safety and potential toxicity of zinc supplementation during TPN.

Main Methods:

• Review of current knowledge on trace element requirements.
• Analysis of the effects of TPN solutions without zinc supplementation.
• Evaluation of zinc sulfate as a preferred supplement.
• Assessment of freeze-dried plasma infusions as a zinc source.

Main Results:

• Zinc supplementation is essential for patients on prolonged TPN.
• Zinc sulfate is an effective and recommended supplement.
• Freeze-dried plasma is an inadequate method for zinc delivery, even short-term.
• Zinc supplementation, following established dosages, presents a low risk of toxicity.

Conclusions:

• Zinc supplementation should be a standard consideration for all patients undergoing extended TPN.
• Zinc sulfate is the supplement of choice for TPN regimens.
• Adequate zinc supply during TPN is achievable with minimal risk of adverse effects.