Increase in energy expenditure by 100% over normal, or two times greater than normal, is seen in a patient with which of the following?
## **Core Concept**
The question pertains to the concept of hypermetabolic states, where the body's energy expenditure significantly increases beyond its basal metabolic rate (BMR). This can occur due to various pathological conditions. Understanding the degree of increase in energy expenditure helps in managing patients' nutritional needs and overall care.
## **Why the Correct Answer is Right**
The correct answer, , refers to a condition known as **severe burns** or more specifically, **major burns** affecting a significant percentage of the body surface area. Patients with major burns experience a hypermetabolic response, which can increase their energy expenditure by 100% or more above normal levels. This response is due to the release of various **catabolic hormones** (like cortisol, adrenaline) and **cytokines**, leading to increased breakdown of muscle and fat for energy. The extent of the increase in energy expenditure correlates with the severity and extent of the burn.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option does not directly relate to a commonly recognized condition associated with a specific percentage increase in energy expenditure in standard medical literature.
- **Option B:** While **sepsis** can lead to an increase in metabolic rate, it is not specifically characterized by a doubling of the normal energy expenditure in a consistent manner across all patients.
- **Option C:** This option might relate to other conditions but does not specifically denote a condition universally recognized to increase energy expenditure by 100% over normal.
- **Option D:** Similarly, this option does not directly correspond to a well-documented condition with a specified increase in energy expenditure.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that patients with **major burns** require careful nutritional support to manage their hypermetabolic state. The **Parkland formula** is often used for initial fluid resuscitation, but nutritional needs are also critical, often requiring a **caloric intake** that matches or slightly exceeds their elevated energy expenditure to support wound healing and recovery.
## **Correct Answer:** . Burns