AP Biology Questions on Burn Severity and Treatment

📚 Quick Study Guide

• 🔥 Burn Severity: Classified by depth (1st, 2nd, 3rd degree) and percentage of total body surface area (TBSA) affected.
• 🌡️ Rule of Nines: A method to estimate TBSA in adults; different proportions apply to children. For example, the entire arm is 9%, the entire leg is 18%, and the anterior trunk is 18%.
• 💧 Fluid Resuscitation: Crucial in burn management. The Parkland formula is commonly used: $4 \text{ mL} \times \text{ TBSA } (%) \times \text{ body weight (kg)}$. Half of the calculated volume is given in the first 8 hours, and the other half over the next 16 hours.
• 🩹 Wound Care: Includes debridement (removal of dead tissue), application of topical antimicrobials (e.g., silver sulfadiazine), and appropriate dressings.
• 💊 Pain Management: Essential due to the severe pain associated with burns; often requires opioid analgesics.
• 🦠 Infection Control: Burns compromise the skin barrier, increasing infection risk. Strict aseptic techniques are necessary.
• 🍎 Nutritional Support: Increased metabolic demands require high-calorie, high-protein diets to promote healing.

🧪 Practice Quiz

1. Which of the following is the MOST accurate method for estimating the percentage of total body surface area (TBSA) affected by a burn in an adult?
   1. A. Lund-Browder Chart
   2. B. Rule of Nines
   3. C. Palm Method
   4. D. Berkow Formula
2. According to the Parkland formula, how much intravenous fluid should be administered in the first 8 hours to a 70 kg patient with 40% TBSA burns?
   1. A. 2800 mL
   2. B. 5600 mL
   3. C. 11200 mL
   4. D. 1400 mL
3. Which type of burn involves damage through the epidermis and dermis, presenting with blisters and severe pain?
   1. A. First-degree burn
   2. B. Superficial partial-thickness (second-degree) burn
   3. C. Deep partial-thickness (second-degree) burn
   4. D. Full-thickness (third-degree) burn
4. What is the PRIMARY purpose of debridement in burn wound care?
   1. A. To promote the formation of new blood vessels
   2. B. To prevent hypothermia
   3. C. To reduce the risk of infection
   4. D. To minimize pain
5. Which of the following topical antimicrobial agents is MOST commonly used in burn wound care?
   1. A. Bacitracin
   2. B. Silver sulfadiazine
   3. C. Neomycin
   4. D. Polymyxin B
6. A patient with severe burns is at high risk for which of the following metabolic complications?
   1. A. Hypometabolism
   2. B. Decreased protein catabolism
   3. C. Hypermetabolism
   4. D. Reduced gluconeogenesis
7. What is the INITIAL step in managing a patient with extensive burns?
   1. A. Wound debridement
   2. B. Fluid resuscitation
   3. C. Pain management
   4. D. Escharotomy