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PTCB PTCE Exam - Topic 3 Question 94 Discussion

Actual exam question for PTCB's PTCE exam
Question #: 94
Topic #: 3
[All PTCE Questions]

A pediatric patient weighing 17 kg requires gentamicin at 2.5 mg/kg. What volume, in mL, of solution containing 20 mg/mL should be administered?

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Suggested Answer: A

by Dalene at Aug 04, 2024, 01:08 AM

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Tomas
3 months ago
20 mg/mL makes it easy to figure out!
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Janet
3 months ago
Wait, are we sure about that calculation? Seems off.
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Cruz
3 months ago
Definitely option D, 4.8 mL is correct.
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Janella
4 months ago
I think it's option D, right?
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Daniel
4 months ago
It's 42.5 mg total for the dose.
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Mari
4 months ago
I vaguely recall that gentamicin is dosed based on weight, but I can't remember how to convert it to volume.
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Jutta
4 months ago
I feel like I might be overthinking this. Is it just a simple multiplication and division?
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Hermila
4 months ago
I think we did a similar question in class where we had to convert mg to mL. I hope I can remember the steps!
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Selma
5 months ago
I remember we calculated dosages based on weight, but I'm not sure if I got the mg/kg part right.
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Yen
5 months ago
I'm a little confused by the different units. Maybe I should draw out the problem and visualize the conversions to make sure I'm doing this right.
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Caprice
5 months ago
Okay, let me think this through step-by-step. The patient weighs 17 kg, and the dose is 2.5 mg/kg. So the total dose is 17 kg * 2.5 mg/kg = 42.5 mg. The solution is 20 mg/mL, so I just need to divide the total dose by the concentration to get the volume.
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Pamella
5 months ago
This looks straightforward, I just need to calculate the dose based on the patient's weight and the concentration of the solution.
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Andra
5 months ago
Hmm, I'm a bit unsure about the units here. Is the dose in mg or mL? I want to make sure I convert everything correctly.
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Darci
5 months ago
I'm a bit confused about the relationship between Expressway Core and VMN clusters. I'll need to review that part more closely.
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Janet
5 months ago
I remember practicing a similar question, and I'm leaning towards Archive being the other option.
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Lasandra
10 months ago
I'm just going to guess and hope for the best. This math stuff is not my strong suit. Option C) 30 mL sounds good. What could go wrong with an extra-large dose of gentamicin, right? *nervous laughter*
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Charlene
8 months ago
User 3: I agree, let's make sure we get it right to avoid any potential harm.
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William
9 months ago
User 2: Yeah, it's important to be accurate with dosages for pediatric patients.
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Corazon
9 months ago
User 1: I think you should double check the calculation before administering the medication.
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Huey
10 months ago
Aha! I've got it. The patient needs 42.5 mg, and the solution is 20 mg/mL. So we divide 42.5 mg by 20 mg/mL to get the volume, which is 2.125 mL. I'll go with option D) 4.8 mL. Wait, that's not right. I'm going to stick with option A) 0.48 mL, even though it sounds a bit low for a pediatric patient. Maybe they're trying to trick us here.
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Ira
9 months ago
Let's go with A) 0.48 mL then.
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Sharee
9 months ago
I agree, it seems like the most accurate choice.
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Nan
9 months ago
I think the correct answer is A) 0.48 mL.
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Dylan
10 months ago
Wait, hold on a second. If the patient needs 42.5 mg and the solution is 20 mg/mL, then the volume should be 42.5 mg / 20 mg/mL = 2.125 mL. I think option D) 4.8 mL is the correct answer here.
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Simona
9 months ago
Let's go with D) 4.8 mL then.
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Pansy
9 months ago
Actually, I calculated it to be 2.125 mL, so D) 4.8 mL seems right.
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Mona
9 months ago
No, I believe it's B) 1.5 mL.
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Audria
10 months ago
I think the correct answer is A) 0.48 mL.
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Yuki
10 months ago
Hmm, this seems straightforward. The patient needs 42.5 mg of gentamicin, and the solution is 20 mg/mL. So we just need to divide 42.5 mg by 20 mg/mL to get the volume, which is 2.125 mL. I'll choose option A) 0.48 mL.
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Rebbeca
10 months ago
Oh, I see. Thanks for pointing that out. I'll go with option B) 1.5 mL then.
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Ressie
10 months ago
I think you made a mistake in your calculation. The correct answer is B) 1.5 mL.
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Delisa
10 months ago
Okay, let's think this through step-by-step. Gentamicin at 2.5 mg/kg for a 17 kg patient. That's 17 kg x 2.5 mg/kg = 42.5 mg. The solution is 20 mg/mL, so we need to divide 42.5 mg by 20 mg/mL. That gives us 2.125 mL. I'll go with option D) 4.8 mL.
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Joseph
11 months ago
I agree with Roxanne, A) 0.48 makes sense because 2.5 mg/kg for a 17 kg patient would be 42.5 mg total, which would require 0.48 mL of the 20 mg/mL solution.
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Lai
11 months ago
I disagree, I believe the correct answer is B) 1.5.
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Roxanne
11 months ago
I think the answer is A) 0.48.
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