Selenium deficiency in long-term total parenteral nutrition.

Area of Science:

• Clinical Nutrition
• Trace Element Metabolism
• Gastroenterology

Background:

• Selenium is an essential trace element crucial for various physiological functions.
• Total parenteral nutrition (TPN) bypasses the gastrointestinal tract, potentially altering nutrient absorption and status.
• Routine selenium supplementation in TPN is not universally practiced, posing a risk for deficiency.

Observation:

• A patient with short bowel syndrome and a fistula, sustained by TPN for three years, presented with characteristic whitened nail beds.
• Despite the absence of cardiac or skeletal muscle symptoms, blood tests revealed critically low selenium levels.
• The patient maintained an active lifestyle but had severely limited oral intake.

Findings:

• The patient's clinical presentation was attributed to selenium deficiency secondary to long-term TPN without supplementation.
• Selenium blood levels were significantly below the normal range.
• Oral supplementation with selenium led to a normalization of blood selenium levels.

Implications:

• This case underscores the critical need for monitoring and supplementing selenium in patients on long-term TPN.
• Early detection and intervention can prevent severe manifestations of selenium deficiency.
• Optimizing TPN formulations to include essential trace elements like selenium is vital for patient outcomes.