Final answer:
The expected minimum urine output for a burn patient can be calculated by multiplying the weight of the patient in kg by 0.5 mL/kg/hr. For a patient weighing 90 kg, the minimum expected output per hour is 45 mL/hr. Multiplying this by 4 hours gives a minimum expected output of 180 mL.
Step-by-step explanation:
To determine the minimum expected output in mL for 4 hours using mL/kg/hr, we need to calculate the minimum urine output per hour using the given hint. The hint states that the expected minimum urine output for most burn patients is 0.5 mL/kg/hr. So, for a patient who weighs 90 kg, the minimum expected output per hour would be 0.5 mL/kg/hr multiplied by 90 kg, which equals 45 mL/hr.
To find the output for 4 hours, we multiply the hourly output by 4: 45 mL/hr * 4 = 180 mL.
Therefore, the minimum expected output in mL for 4 hours using mL/kg/hr is 180 mL.