Drug Calculations: Displacement Values

Three examples of question where a nurse would need to work out a displacement value. Hope this helps.

[@dariabarbu7466]

Life saver !

[@mariaruane3668]

You are magic! Thank you so much for helping. I appreciate your excellent explanations.

[@ibelemagreen2417]

Thanks for a simple solution!

[@theaceman8277]

thank you so much

[@kw217]

What a legend

[@The_Struggle_]

Thankyou and you look cute in this hair style😳

[@isaacgowling1007]

This only works if the displacement value is per the volume you are trying to make which is very unlikely to ever happen in real life or in an exam

[@LifeofaStudentNurse]

I don't fully understand what you mean by the displacement value being per the volume. These are examples of medications I drew up at work all the time. All our IVs worked like this. You might have 1g in 20mls with a displacement value of 0.6mls so you add 19.4mls to get your 1g in 20mls. Then the child may only require 480mgs and you then work out how many mls you give the child. But in this video I am not doing IV drug calculations, I am just focussing on displacement values.

[@isaacgowling1007]

@@LifeofaStudentNurse what I mean is displacement values are done to a certain volume. for example 0.05/5ml. So I assume the displacement value you are provided are specific but in displacement calculations, you would have to make sure you have the value to the correct volume

[@HowToTutorials2]

This is all wrong ffs

[@LifeofaStudentNurse]

This is an exert from Infant Journal
'Displacement values need to be accounted
for whenever reconstitution from a dry
powder or crystalline form is required.
Whilst displacement values are of no
interest if a complete vial is to be given, for
smaller children and neonates this is often
not the case. The displacement value can
affect the amount of drug given if it is not
taken into account.
The easiest way to address this is to
consider the displacement value as part of
the final volume. Thus, the displacement
value needs to be subtracted from the total
volume of fluid that would be used to
reconstitute the vial.'
This is exact what I say and demonstrate in this video. If you would like to tell me which part you thought was incorrect then I could explain it to you further.

[@isaacgowling6732]

@@LifeofaStudentNurse its not incorrect its just incomplete you start with half the answers by havving the valvues when in reality those need to be aclculated first as well