**Question:** Complication of total parenternal nutrition is -

A. Hyperglycemia
B. Hypoglycemia
C. Hyperlipidemia
D. Hypocalcemia

**Core Concept:** Total parenteral nutrition (TPN) is the administration of essential nutrients (carbohydrates, proteins, and fats) and electrolytes via a central venous catheter to patients unable to meet their nutritional requirements through oral or enteral routes due to illness or injury.

**Why the Correct Answer is Right:** TPN can lead to several complications. Hyperglycemia occurs when the administered glucose exceeds the patient's requirements, leading to hyperglycemia. Hypoglycemia can occur when glucose administration is inadequate, leading to low blood glucose levels. Hyperlipidemia is a potential complication due to excessive lipid administration, which can result in elevated triglycerides and cholesterol levels. Hypocalcemia refers to low blood calcium levels, which can result from inadequate administration of calcium or phosphorus in the TPN solution.

**Why Each Wrong Option is Incorrect:**

**Option A (Hyperglycemia):** Hyperglycemia is a consequence of excessive glucose administration, not a direct complication of TPN itself.

**Option B (Hypoglycemia):** Hypoglycemia occurs when the glucose administered is insufficient for the patient's needs, not due to an inherent TPN complication.

**Option C (Hyperlipidemia):** This complication arises from excessive lipid administration, not a direct consequence of TPN.

**Option D (Hypocalcemia):** Hypocalcemia is primarily related to inadequate calcium or phosphorus administration in the TPN solution, not a direct consequence of TPN itself.

**Core Concept:** TPN is used for critically ill or intolerant patients who cannot receive nutrients orally or enterally. It supplies essential nutrients to maintain or restore the patient's nutritional status.

**Clinical Pearl:** TPN should be administered under close monitoring to prevent complications. Adequate assessment of the patient's nutritional requirements, regular laboratory assessments, and adjusting the TPN composition accordingly are crucial to minimize complications.