[richardjboro1]

Ok, I just took an online dosage test for my peds rotation. One of the questions confused me.
It asked: given 2000U/L infusing, and 3cc/hr drip rate, with a 60gtts/cc what amount of Heparin was given/hr. I figured it by v/txq=r

so....
i reversed that to 2000U (3cc)/1000ml and got 6 U/hr was infusing. Am I close on this??

Thanks for any help.

Richard

[locolorenzo22]

Ok, I just took an online dosage test for my peds rotation. One of the questions confused me.
It asked: given 2000U/L infusing, and 3cc/hr drip rate, with a 60gtts/cc what amount of Heparin was given/hr. I figured it by v/txq=r

I'm not sure...but this is what I got when I worked it out.......
2000 Units per 1000ml..... so 2 Units per 1 ml.... 2 units/1 hr * 3 ml = 6 units....

[Achoo!]

1ml/2U 3ml/1hr- cross multiply and yes 6 is what I got as well.

[morte]

Originally Posted by richardjboro1

Ok, I just took an online dosage test for my peds rotation. One of the questions confused me.
It asked: given 2000U/L infusing, and 3cc/hr drip rate, with a 60gtts/cc what amount of Heparin was given/hr. I figured it by v/txq=r

so....
i reversed that to 2000U (3cc)/1000ml and got 6 U/hr was infusing. Am I close on this??

Thanks for any help.

Richard

i havent a clue what v/txq=r means.....but you have a two to one relation between units of heparin and ml of fluid there for 3 ml is 6 units

[Daytonite]

Yes, Richard, your answer is correct. I, also, don't know what v/txq=r represents, but if you do and it works for you every time, more power to you. I worked the problem out by dimensional analysis:

2000 units/1 Liter (dose on hand) X 3 cc/1 hour (dose being given) x 1 Liter/1000 cc (conversion factor) = 6 units/1 hour (dose desired)

[richardjboro1]

volume divided by time *constant= Rate was what I used. Thanks for all the replies folks.

[morte]

Originally Posted by richardjboro1

volume divided by time *constant= Rate was what I used. Thanks for all the replies folks.

could you explain your equation, i dont follow it .....what is the * for, what does it represent?

[richardjboro1]

*= times or multipled by.... and the constant is the drip factor or gtts/min. That equation is from our dosage book. is that not a regularly used equation?

[morte]

Originally Posted by richardjboro1

*= times or multipled by.... and the constant is the drip factor or gtts/min. That equation is from our dosage book. is that not a regularly used equation?

doesnt ring a bell with me, but my last academic exposure to arithmetic computation was ~ 1984......what numbers are you plugging into this equation, for each variable?.....to me the most easy way to do it is
2000U/1000ml : x/3ml......

[SarasotaRN2b]

Originally Posted by Daytonite

Yes, Richard, your answer is correct. I, also, don't know what v/txq=r represents, but if you do and it works for you every time, more power to you. I worked the problem out by dimensional analysis:

2000 units/1 Liter (dose on hand) X 3 cc/1 hour (dose being given) x 1 Liter/1000 cc (conversion factor) = 6 units/1 hour (dose desired)

Very clear explanation, thank you!