Using rule of nine percentage of the Right lower limb burn is?

Appeared in: WCL Staff Nurse - 2019

Explanation

The Wallace Rule of Nines is a standardized method used to quickly estimate the total body surface area (TBSA) affected by a burn in adults.
According to this rule, each entire lower limb (leg) is allocated 18% of the TBSA.
This is calculated by summing the anterior (front) surface of the leg (9%) and the posterior (back) surface of the leg (9%), as clearly shown in the provided diagram.

Option A: This percentage represents the anterior or posterior surface of one arm.
Option B: This represents only the anterior or posterior surface of a single leg, or the entire surface of one arm, or the head and neck. The question asks for the entire lower limb.
Option D: This value does not correspond to a standard single anatomical area in the Rule of Nines. It would represent a combination of body parts.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain TBSA estimation using the Rule of Nines for burns as background academic context rather than a clinical decision trigger.
Accurate TBSA estimation is critical for calculating intravenous fluid resuscitation needs in the first 24 hours post-burn, often using the Parkland formula (4 mL x body weight in kg x %TBSA).
The TBSA percentage guides crucial treatment decisions, including the need for transfer to a specialized burn center, surgical intervention, and nutritional support.
What if the patient was a 2-year-old child? The Rule of Nines would be inaccurate. The Lund-Browder chart, which accounts for the different body proportions of children (larger head, smaller legs), must be used instead. A 2-year-old's leg is typically estimated at around 14% TBSA.

How to Approach the Question

First, identify the core concept of the question, which is the 'Rule of Nine' for burn percentage.
Next, analyze the provided image, which is a visual guide to the Rule of Nines, confirming the percentages for different body parts.
Locate the specific body part mentioned in the question: the 'Right lower limb'.
According to the diagram, the anterior part of the leg is 9% and the posterior part is 9%.
Sum these values (9% + 9%) to find the total percentage for one entire lower limb, which is 18%.
Finally, select the option that matches your calculation.

Concept Tested & Keywords

Q7GoevinsrEOiLPhRLShNp

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 693-695

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 747-749

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Attempt every question from this paper in a timed mock, then review the full solution for each one.