A nurse is reviewing a client's intake and output and notes the following: 0.9% sodium chloride 600 mL IV infusion, cefazolin 250 mg in dextrose 5% in water 100 mL intermittent IV bolus, 200 mL emesis, 40 mL voided urine, and 20 mL urine from straight catheterization. The nurse should record the difference between the intake and output as how many mL?

The correct answer is B: 440 mL. To calculate the difference between intake and output, add up all the intake (600 mL + 100 mL = 700 mL) and subtract the total output (200 mL + 40 mL + 20 mL = 260 mL). Therefore, the difference is 700 mL - 260 mL = 440 mL. This is the correct calculation because it considers all the fluid inputs (IV infusions) and outputs (emesis, voided urine, catheterized urine).
Choice A (430 mL) is incorrect because it does not consider all the fluid inputs and outputs. Choice C (450 mL) is incorrect because it overestimates the difference by including additional fluid that was not accounted for. Choice D (460 mL) is incorrect because it overestimates the difference by including additional fluid that was not accounted for.