Body Surface Area Calculator Eczema

Palm Method:

\[ \%BSA = \text{Sum of affected areas (1 palm ≈ 1%)} \]

Total Body Surface Area Affected:

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1. What is BSA in Eczema?

Body Surface Area (BSA) assessment in eczema measures the percentage of skin affected by the condition. The palm method (1 palm ≈ 1% BSA) is a practical way to estimate affected areas.

2. How Does the Calculator Work?

The calculator uses the palm method equation:

\[ \%BSA = \text{Number of palms} + \text{Additional percentage} \]

Where:

1 palm ≈ 1% of total body surface area
Additional percentage can be added for more precise measurement

Explanation: This method provides a quick, practical estimate of eczema severity based on affected surface area.

3. Importance of BSA Calculation

Details: BSA assessment helps determine eczema severity, guide treatment decisions, and monitor disease progression or treatment response.

4. Using the Calculator

Tips: Count how many palm-sized areas are affected (1 palm = patient's own palm size). You can add additional percentage for more precise measurement if needed.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the palm method?
A: It provides a good estimate for clinical purposes, though exact measurements may vary slightly between individuals.

Q2: What's considered mild, moderate and severe eczema by BSA?
A: Generally: mild (<10%), moderate (10-30%), severe (>30%), but clinical judgment is also important.

Q3: Should I include unaffected skin between lesions?
A: Only include areas with active eczema, not the unaffected skin between lesions.

Q4: How does this differ for children?
A: Children have different body proportions - their palms represent a slightly higher percentage of total BSA than adults.

Q5: Are there more precise methods?
A: Yes, the Rule of Nines or Lund-Browder charts are more precise but require more time and training to use.