An adult casualty weights 165 pounds. He has second- and third-degree burns over

his back, buttocks, and the backs of both legs. Compute the flow rate for the first 8

hours; then for the remaining 16 hours if 10 drops equal one milliliter.

1. Estimate BSA burned:

Back--

9 percent

Buttocks --

9 percent

Back of left leg --

9 percent

Back of right leg --

9 percent

Total --

36 percent

2. Estimate weight in kilograms

165 pounds/2.2 pounds per kilogram = 75 kilograms

3. Multiply weight (kg) by the percent of body surface area burned

75 x 36 = 2700 (Note: The percent BSA is not a decimal.)

4. Multiply by 4 milliliters.

2700 x 4 ml = 10,800 ml (total fluid for first 24-hour period)

5. Divide by 2.

10,800 ml/2 = 5400 ml (total fluid administered during first 8 hours;

total fluid administered during following 16

hours)

6. Divide first half by 8. Divide second half by 16.

5400 ml/8 hours = 675 ml per hour (first 8 hours)

5400 ml/16 hours = 337.5 ml per hour (remaining 16 hours)

7. Divide by 60.

675/60 = 11.25 ml per minute (first 8 hours)

337.5/60 = 5.625 ml per minute (remaining 16 hours)

8. Multiply by the number of drops per milliliter

11.25 x 10 = 112.5 drops per minute (first 8 hours)

5.625 x 10 = 56.25 drops per minute (remaining 16 hours)

NOTE:

Drops per minute figure will be rounded when actually

setting IV flow rate.

Figure 6-6. Example of a flow rate computation using modified Brook formula

for calculating replacement fluid.

MD0554

6-11

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