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Anatomy and Physiology help?
If a person is burned and the burn covers 30% of the trunk area (front and back) and 40% of the arms and legs, what percentage of the total body surface has been burned. just as a side note: arms and legs account for 54% of the total body surface, and the trunk accounts for 36%. Please show your work so that I can figure out how to calculate this. Thank you!
2 Answers
- 1 decade agoFavorite Answer
Using the Rule of Nines to estimate the body surface area, you are correct that the arms and legs are a total of 54% and the entire trunk is 36%.
Now, calculate the actual surface area burned.
Arms and legs: 40% of 54% = 0.40 * 0.54 = 0.216 = 21.6%
Trunk: 30% of 36% = 0.30 * 0.36 = 0.108 = 10.8%
Add the two areas together: 21.6% + 10.8% = 32.4%
So the burn involves 32.4% of the body.
- 1 decade ago
Trunk is 36% of the total body surface. One third of this is burned: 36 * .3 = 13%.
Arms and legs are 54% of the total body. 40% of them are burned. 54 * .4 = 21.6%.
Total percentage of body surface burned: 13 + 21.6 = 34.6%.