Trauma and burns: modified Brooke formula and urine output: practice question

A General Surgery question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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General Surgery · Trauma and burns: modified Brooke formula and urine output

Sample item

Which statement about fluid resuscitation in adult burns is correct?

ABrooke uses 4 mL per kg per percent and colloid onlyBUrine output target is 5 mL/kg/hourCFluids are not needed under 40 percent burnsDThe modified Brooke formula uses 2 mL per kg per percent burn, and urine output is targeted at 0.5 mL/kg/hour

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. The modified Brooke formula uses 2 mL per kg per percent burn, and urine output is targeted at 0.5 mL/kg/hour

Modified Brooke uses lactated Ringer 2 mL per kg per percent TBSA in the first 24 hours, with half in the first 8 hours. Adults should pass 0.5 mL/kg/hour (30 to 50 mL/hour) and children 1 mL/kg/hour. Over-resuscitation causes oedema and compartment syndromes.

Option by option

A. Brooke uses 4 mL per kg per percent and colloid only
Four mL is the Parkland volume.
B. Urine output target is 5 mL/kg/hour
Five mL per kg per hour is far too high.
C. Fluids are not needed under 40 percent burns
Fluids are required above about 15 to 20 percent burns.
D. The modified Brooke formula uses 2 mL per kg per percent burn, and urine output is targeted at 0.5 mL/kg/hour (correct)
Correct. This is accurate for Brooke and urine target.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this General Surgery question

What is the answer to this General Surgery question?

The best answer is D, The modified Brooke formula uses 2 mL per kg per percent burn, and urine output is targeted at 0.5 mL/kg/hour. Modified Brooke uses lactated Ringer 2 mL per kg per percent TBSA in the first 24 hours, with half in the first 8 hours.

Why is "Brooke uses 4 mL per kg per percent and colloid only" not the answer?

Four mL is the Parkland volume.

Why is "Urine output target is 5 mL/kg/hour" not the answer?

Five mL per kg per hour is far too high.

Why is "Fluids are not needed under 40 percent burns" not the answer?

Fluids are required above about 15 to 20 percent burns.

What concept does this question test?

It tests Trauma and burns: modified Brooke formula and urine output in General Surgery. Adults should pass 0.5 mL/kg/hour (30 to 50 mL/hour) and children 1 mL/kg/hour. Over-resuscitation causes oedema and compartment syndromes.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Trauma and burns: modified Brooke formula and urine output?

Learn classic signs and eponyms alongside what they diagnose. Then use the flashcards and the other General Surgery questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.