A patient of total parenteral nutrition develops delayed wound healing, loss of taste, deficient immunity and diarrhea. Most probably it could be due to deficiency of: September 2008
**Core Concept**
Total parenteral nutrition (TPN) is a life-sustaining therapy that provides essential nutrients to the body intravenously. However, TPN can lead to various complications if the formulation is not balanced, including deficiencies of essential micronutrients.
**Why the Correct Answer is Right**
The symptoms described in the question, including delayed wound healing, loss of taste, deficient immunity, and diarrhea, are characteristic of zinc deficiency. Zinc plays a crucial role in wound healing, immune function, taste sensation, and maintaining the integrity of the epithelial lining of the gut. A deficiency in zinc can lead to impaired wound healing, taste disturbances, and increased susceptibility to infections. Additionally, zinc deficiency can cause damage to the intestinal mucosa, leading to diarrhea.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the symptoms described. A deficiency in vitamin A would lead to night blindness, impaired immune function, and skin problems, but not the specific combination of symptoms described in the question.
**Option B:** A deficiency in vitamin C would lead to scurvy, characterized by fatigue, malaise, and connective tissue weakness, but not the specific symptoms described in the question.
**Option C:** A deficiency in iron would lead to anemia, characterized by fatigue, weakness, and shortness of breath, but not the specific symptoms described in the question.
**Clinical Pearl / High-Yield Fact**
Zinc deficiency is often overlooked as a cause of delayed wound healing, as it is often attributed to other factors such as poor circulation or infection. However, zinc supplementation is often effective in improving wound healing in patients with zinc deficiency.
**Correct Answer:** B.