Math problem confusion

Yeah don't feel bad, we've all been there. Better to ask and get help.Best of luck.

Thank you for the positive comment.

Thank you also again to Nightmare for commenting about PMing. I hope I was able to help the OP.

That is what I came up with sort of...

60x15gtt/30min=30gtt/min or 120mL/hr

Oh, and I agree with what you got on the first part or the 10mL part.

Ok now I am confused and I thought I was doing this right! And I also have a math test coming up. This is how I got my answer for the second part:

60 ml x 15 gtt = 900/30 min= 30gtt/min

How do you get 120 ml if it is already 60 ml/hr?

Plz help!

Ok now I am confused and I thought I was doing this right! And I also have a math test coming up. This is how I got my answer for the second part:

60 ml x 15 gtt = 900/30 min= 30gtt/min

How do you get 120 ml if it is already 60 ml/hr?

Plz help!

You're taking shortcuts with your units and that's a sure path to confusion.

You understand the 60 mL, right? (10 mL for the 2 grams of drug + 50 mL for the NaCl)

For how long are you going to run it? The problem statement say: "30 minutes."

Your flow rate, therefore, is: 60 mL / 30 min = 2 mL/min.

OK, what if you want to know the flow rate per hour?

(60 mL / 30 min) x (60 min / 1 hr) = 120 mL/hr. Does that make sense?

If you want to know the drops per minute, use the drip factor:

(60 mL / 30 min) x (15 gtt / 1 mL) = 30 gtt/min

It is not 60ml/hr. You are giving 60ml over 30 min so that equals a rate of 120ml over one hour. The drop rate is 15gtts/ml so you multiply 120 by 15. that gives you 600 gtts /hr. Make sense?

I thought we already figured out that it's 60 ml (part a) and the problem asks for gtts/min over 30 min not an hr.

Am I missing something? I have never done a problem where you solve for gtts/hr, it's always ml/hr and gtt/min. That's where I am confused. 600 seems unreasonable to me. But I appreciate you helping me with this conundrum!

You're taking shortcuts with your units and that's a sure path to confusion.

You understand the 60 mL, right? (10 mL for the 2 grams of drug + 50 mL for the NaCl)

For how long are you going to run it? The problem statement say: "30 minutes."

Your flow rate, therefore, is: 60 mL / 30 min = 2 mL/min.

OK, what if you want to know the flow rate per hour?

(60 mL / 30 min) x (60 min / 1 hr) = 120 mL/hr. Does that make sense?

If you want to know the drops per minute, use the drip factor:

(60 mL / 30 min) x (15 gtt / 1 mL) = 30 gtt/min

Aha! Now I get it! Makes perfect sense, I was missing something and that was why I was confused! These problems can be so confusing to the novices, especially those who are not strong in math!

Thanks for clearing out the cobwebs!

Yeah you are right I should have gone the extra step and figured out how many gtts/min. I am rusty.

Don't feel bad, cuz if you're rusty, I'm clueless! I have a test in late Aug and cuz I am not strong in math, I have been practicing until I have an indention in my fingers! And I thought I had it all figured out. These tests just add more and more steps every semester and if you miss one step it's wrong and it's so easy to do that. I have to get 18/20 to pass and although you get 3 tries, I want to ace it the first time around and concentrate on M/S and not this lousy test. Thanks anyhow!

Don't feel bad, cuz if you're rusty, I'm clueless! I have a test in late Aug and cuz I am not strong in math, I have been practicing until I have an indention in my fingers! And I thought I had it all figured out. These tests just add more and more steps every semester and if you miss one step it's wrong and it's so easy to do that. I have to get 18/20 to pass and although you get 3 tries, I want to ace it the first time around and concentrate on M/S and not this lousy test. Thanks anyhow!

The most valuable piece of advice I can offer is to show ALL of your units ALL of the time. I've tutored a lot of chemistry for the BSN students and this is the root of the majority of their problems.

And never, NEVER, ever skip a step. I'm really good at these things and I still show each and every single step.

I have a math question? I hope someone can help me with this.1gm of a med given over 6hr; have 1gm in 500ml. Drug is to be administer at 10gtt/ml over 30 min.Please help calculate.

Daytonite,Thanks for trying to help me with this math problem. It seems that I have left out a portion of the equation. Unfortunately I can't remember exactly how it was set up.Sorry! I'll have to try and find the origal equation and repost for assistance.Thanks again