Daily Bolus of LR: Rule of 9’s

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June 28, 2011 by dailybolusoflr

Rule of 9's

To estimate the total body surface area that is burned, you can use the rule of 9's. This should be helpful for determining fluid replacement needs as well as determining which patients should be sent to specialty burn centers.

For adults, it is mainly based on the number 9.
9% for the head (4.5% for each the front and the back)
18% for the torso front (9% for the chest and 9% for the abdomen)
18% for the torso back (9% for the upper back and 9% for the lower back)
9% for each arm (4.5% front and 4.5% back)
18% for each leg (9% front and 9% back)
1% for the genital region

For children, the head takes up a much larger surface area.
18% for the head (9% for each the front and the back)
18% for the torso front (9% for the chest and 9% for the abdomen)
18% for the torso back (9% for the upper back and 9% for the lower back)
9% for each arm (4.5% front and 4.5% back)
14% for each leg (7% front and 7% back)

You can reference the diagram on mdcalc.com
http://www.mdcalc.com/parkland-formula-for-burns

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