# Help! The teacher's answers are different from mine?

Students   (4,075 Views | 39 Replies)
by Beaue

1,547 Profile Views; 40 Posts

Erythromysin 250 mg in 100 ccD5W to infuse over 1 hour. The I.V. tubing delivers 20 gtt/ml. Calculate gtt/min? I got 83.3 but her answer that she gave us was 33.

I am so afraid of failing drug cal tomorrow. We had only 2 days of class where she went over chapter 7 and 8, which is on Monday and Tuesday. Friday she handed out calculation worksheet to us while we were in fundamentals. The test is on Tuesday (tomorrow). We actually were in Fundamentals, not her class so barely got to ask questions. This seems unfair. we needed another day to review.

Edited by Beaue

##### Share on other sites

1 Follower; 2,300 Posts; 48,506 Profile Views

Why don't you show us your work?

ETA: This will better help us to help you.

##### Share on other sites

1 Follower; 2,300 Posts; 48,506 Profile Views

24 minutes ago, Beaue said:

Erythromysin﻿﻿ 250 mg in 100 ccD5W to infuse over 1 hour. The﻿ I.V. tubing delivers 20 gtt/ml. Calculate gtt/min﻿?﻿...

[...]

When you are asked to solve these problems you are going to be given a lot of information, not all of which you will need.  When solving these, you need to determine what you are being asked to solve, and then determine what of the provided information you need to do this.

First, what are you being asked to determine?

##### Share on other sites

40 Posts; 1,547 Profile Views

1 hour ago, chare said:

When you are asked to solve these problems you are going to be given a lot of information, not all of which you will need.  When solving these, you need to determine what you are being asked to solve, and then determine what of the provided information you need to do this.

First, what are you being asked to determine?

I have no idea how to solve this problem. I tried several ways and didn't work out. The last sentence says "calculate gtt/min." That's the exact words. I posted the problem for you as it was written. I don't know what to do with the ml/cc in the problem. They haven't had that in the other problems. I did it this way:

250/60 x 20gtt divided by 100ml/cc.  mm and cc are the same things.  I'm sure ml and mg are the same too. There still are 4 problems that I can't figure out.  Four out of 59 problems aren't too bad. I don't want to wait right before the test to learn how to do the problems, which is what will happen if I wait to ask the teacher.  Hope someone can help.

##### Share on other sites

40 Posts; 1,547 Profile Views

I'm stressed big time. I don't usually ask for help.  after doing the problem over 5 times, I thought I better ask someone to help me. I even tried to find the answer online and didn't find it. Wish me luck on tomorrow's test. If I fail the test tomorrow I'm going to be extremely upset with the program.

Edited by Beaue

##### Share on other sites

1 Follower; 2,300 Posts; 48,506 Profile Views

What exactly are you being asked to determine?

ETA: And do you understand what that is?

##### Share on other sites

40 Posts; 1,547 Profile Views

calculate gtt/min

##### Share on other sites

1 Follower; 2,300 Posts; 48,506 Profile Views

Just now, Beaue said:

calculate gtt/min

You know that you have 250 mg of erythromycin in 100 mL of D5W.  Do you need both of these items?

##### Share on other sites

1 Follower; 2,300 Posts; 48,506 Profile Views

28 minutes ago, Beaue said:

[...]

...I'm sure ml and mg are the﻿ same ﻿too.﻿ ...

[...]

No, they're not.  You're using them interchangeably and this is a large part of your problem.

##### Share on other sites

40 Posts; 1,547 Profile Views

Do I need that 100 cc/ml?

##### Share on other sites

1 Follower; 2,300 Posts; 48,506 Profile Views

Just now, Beaue said:

Do I need that 100 cc/ml?

Yes.  What else, of the information that you were provided do you need?

##### Share on other sites

40 Posts; 1,547 Profile Views

250mg in 100cc to infuse in over 1 hour and the 20 gtt/ml.