Rule of 9s

The Rule of 9’s
The CoolTherm™ packaging includes an image of the ‘Rule of 9s’, as an aid memoir to medics, helping assess the burn area.  Additionally, CoolTherm™ packaging is marked with the adult and child percentages that the dressing will cover.  (fig.1)
Total body surface area (TBSA) is an assessment measure for burns of the skin. In adults, the ‘Rule of 9s’ is used to determine the total percentage of area burned, for each major section of the body.
In some cases, the burns may cover more than one body part, or may not fully cover such a part. In such cases, burns are measured by using the palm of the casualty as a reference point for 1% of the body.
For children and infants, the Lund-Browder chart is used to assess the burned body surface area. Different percentages are used, because the ratio of the combined surface area of the head and neck to the surface area of the limbs, is typically larger in children than in adults.

Rule9Fig.1
CoolTherm™ Burn Dressings are clearly marked with both adult and child percentage areas that the dressing will cover.
Rule9_AdultADULT
Anterior head 4.5%
Posterior head 4.5%
Anterior torso 18%
Posterior torso 18%
Anterior leg, each 9%
Posterior leg, each 9%
Anterior arm, each 4.5%
Posterior arm, each 4.5%
Genitalia/Perineum 1%
Rule9_ChildCHILD
Anterior head 9%
Posterior head 9%
Anterior torso 18%
Posterior torso 18%
Anterior leg, each 6.75%
Posterior leg, each 6.75%
Anterior arm, each 4.5%
Posterior arm, each 4.5%
Genitalia/Perineum 1%

 


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