Skip to content
View in the app

A better way to browse. Learn more.
allnurses

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.
Discussion

Advanced calculation problem. Help!!!

Hello, I am in the third semester now and we are doing the advanced calculations. I can do all of them except I am having troubles with the ones that have 3 or more steps.. I didnt know if anyone had an easier way to look at this.. I am pulling my hair out.. this is how it goes

Order: morphine sulfate 6mg IV push q3hr p.r.n. pain. On hand is morphine sulfate 10mg/ml, with drug reference recommendation for IV infusion not to exceed 2.5mg/min. How many ml will the nurse push every 15 seconds.

I get it up to the 0.6 ml but then I cant figure out what is next and so on.. thanks in advanced. I have the answer but just trying to figure out if there is another way to do this that I may understand.

Featured Replies

2.5 mg = 0.25 ml. Divide that by 4 (4 blocks of 15 secs per minute)= .06 ml.

  • Experts

See below.

but recommendations are not to exceed 2.5 mg/min

if 0.6 mL is given in one minute then that would be giving 6 mg/min

(10 mg/mL works out to 2.5 mg/ 0.25 mL)

0.25 mL would be the maximum to be given in one minute (because = 2.5 mg)

0.25 mL divided by 4 doses per minute works out to 0.0625 mL

(rounded to 0.06 mL)

  • Experts

OK. Let me re-calculate this:

STEP #1

6 mg
(dose desired)
/
10 mg
(dose on hand)
x
1 mL
(amount on hand)
=
0.6 mL
(dose to give)

STEP #2

6 mg
(dose desired)
/
2.5 mg
(limited dose you can give)
x
1 minute
=
2.4 minutes
(time it will take to inject the 6 mg dose)

STEP #3

0.6 mL
(dose to give)
/
2.4 minutes
(time required to inject the dose)
x
1 minute
/
60 seconds
(conversion factor)
=
0.6 mL/144 seconds
=
0.004166 mL/second

STEP #4

60 seconds
/
4
(intervals per minute)
=
15
(seconds per interval)

STEP #5

0.004166 mL/second x 15
=
0.06 mL per every 15 seconds

but recommendations are not to exceed 2.5 mg/min

if 0.6 mL is given in one minute then that would be giving 6 mg/min

(10 mg/mL works out to 2.5 mg/ 0.25 mL)

0.25 mL would be the maximum to be given in one minute (because = 2.5 mg)

0.25 mL divided by 4 doses per minute works out to 0.625 mL per dose q 15 seconds (rounded to 0.6 mL)

(must recheck that decimal point: 0.25 mL divided by 4 doses = 0.0625 mL

rounded to 0.06 mL)

Guest
This topic is now closed to further replies.
Go to topic listing

Currently Reading 0

  • No registered users viewing this page.

Account

Navigation

Search

Search

Configure browser push notifications
Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.