Drug Calculations with weights

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Mark Hodds

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Mark Hodds 5 years, 8 months ago

Created this as a copy of Drug Calculations.

Name	Status	Author	Last Modified
Drug Calculations	Ready to use	Mark Hodds	14/06/2019 10:41
Drug Calculations 1	Ready to use	Mark Hodds	20/04/2017 14:12
Lois's copy of Drug Calculations	draft	Lois Rollings	05/06/2019 16:07
Drug Calculations - different weights	draft	Mark Hodds	09/07/2019 16:46
Drug Calculations - different weights, different amounts	draft	Mark Hodds	10/07/2019 13:29
Mark's copy of Drug Calculations - different weights, different amounts	draft	Mark Hodds	10/07/2019 13:24
Mark's copy of Mark's copy of Drug Calculations - different weights, different amounts	draft	Mark Hodds	10/07/2019 13:24
Drug Calculations - different weights, different amounts, different volumes	draft	Mark Hodds	05/08/2019 10:48
Drug Calculations with weights	draft	Mark Hodds	05/08/2019 10:09
Mark's copy of Drug Calculations	draft	Mark Hodds	05/08/2019 09:55
Mark's copy of Drug Calculations	draft	Mark Hodds	05/08/2019 09:55
Mark's copy of Drug Calculations	draft	Mark Hodds	05/08/2019 09:55
Mark's copy of Drug Calculations	draft	Mark Hodds	05/08/2019 09:55
Drug Calculations with weights - different weights	draft	Mark Hodds	05/08/2019 10:18
Drug Calculations with weights - different weights, different amounts	draft	Mark Hodds	05/08/2019 10:31
Drug Calculations with weights - different weights, different amounts, different volumes	draft	Mark Hodds	05/08/2019 10:48

There is one other version that you do not have access to.

Question statement

Give any introductory information the student needs.

			Name	Type	Generated Value

a	number	0.05
b	integer	2
c	number	1.250
d	number	40.000
f	integer	50
g	number	2.5

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(0.1,0.5,0.01,0.05)

JME function reference

Description

Describe what this variable represents, and list any assumptions made about its value.

Can an exam override the value of this variable?

Generated value: `number`

0.05

→ Used by:

Advice
"Unnamed part" - prompt

Parts

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1. Gap Number entry
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Ask the student a question, and give any hints about how they should answer this part.

Your patient has been prescribed $\var{a}$ mg/kg of a drug as an injection. The stock strength given is $\var{b}$ mg in $1$ ml and the patient weighs $\var{f}$ kg. How many ml do you give to the patient? Give your answer to 3 decimal places where necessary.

Unnamed gap ml

Advice

Solution

In order to calculate the amount of drug in ml, you need to use the following formula:

$\dfrac{\text{Prescribed dose}}{\text{Stock Strength}}$ $\times$ Stock dose.

In this question: Prescribed dose is $\var{a}$ mg, Stock Strength is $\var{b}$ mg and Stock dose is 1ml.

However, we also need to consider the weight of the patient in this question. So we need to multiply the Prescribed Dose by the Weight.

This gives: $\var{a} \times \var{f} = \var{g}$ .

Then, using the formula: $\dfrac{\var{g}}{\var{b}}$ $\times$ $1$ = $\var{c}$ ml.

Alternative Solution

You are told that the stock strength of the drug is $\var{b}$ mg in $1$ ml.

So for every $\var{b}$ mg of the drug we need, we need to give the patient $1$ ml.

This means $\var{b}$ mg = 1ml.

We need $\var{a} \times \var{f} = \var{g}$ mg to take into account the weight of the patient.

In order to get $\var{g}$ mg, we divde $\var{b}$ mg by $\var{b}$ and multiply by $\var{g}$ .

Because $\var{b}$ mg = $1$ ml and we have divided $\var{b}$ mg by $\var{b}$ and then multiplied by $\var{g}$ to get $\var{g}$ mg, we must divide the right hand side of the equals sign by $\var{b}$ and multiply by $\var{g}$ also.

So, we have $\dfrac{\var{b}}{\var{b}} \times \var{g}$ = $\dfrac{1}{\var{b}} \times \var{g}$ .

$\var{g}$ mg = $\var{c}$ ml.

Therefore we must need to give the patient $\var{c}$ ml.

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Gap-fill		Hasn't run yet
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This question is used in the following exam:

Drug Calculations with Weight by Mark Hodds in Nursing Questions.

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Taxonomy: mathcentre

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Mark Hodds 5 years, 8 months ago

Error in variable testing condition

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Generated value: `number`

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Drug Calculations with weights

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Mark Hodds 5 years, 8 months ago

Error in variable testing condition

Error

Warning

Generated value: number

Parts

Gap-fill

Generated value: `number`