Part 6 Calculation skills

Question 1

1% means what in terms of 1g
give equivalents toos

Answer 1

1g in 100ml
10mg in 1ml
1g in 100g

Question 2

what vol of 80mg/2ml solution is required to give a 40mg dose

Answer 2

1ml

Question 3

lidocaine 1% solution how many mg in 1ml of lidocaine

Answer 3

1% means 1in 100
in terms of soltuion it means 1g in 100ml

so 0.01g in 1ml
so 10mg in 1ml

ie a 2% solution is dpouble the concentration

Question 4

express 250micrograms/ml of dixogoxin as a percentage

Answer 4

this become 0.25mg/ml as divide by 1000
which is 2.5mg in 10ml
25mg/100ml
0.025g/100ml
which is 0.025% solutuon

Question 5

IM injection of 0.5mg of adrenaline in 1 in 1000 for treatment of anaphlaxis

what volume solution was he given

Answer 5

1in 1000 means 1g in 1000ml
1000mg in 1000ml
1mg/ml
0.5mg/0.5ml

Question 6

80kg given 4ml of furosemide 50mg in 5ml solution by slow IV infection

what dose given

Answer 6

50mg/5ml
40mg/4ml

so dose was 40mg

Question 7

later on give 75mg of furosemide how many militres of 50mg/5ml solution do you need to give

Answer 7

7.5ml

Question 8

11yr old girl
30kg
2mg/kg slow IV bolus
ampoule contians 80mg in 2ml

Answer 8

60mg/30kg

need to give 1.5ml

Question 9

3kg need maintenance dose of 25micrograms of digoxin

comes as 500micrograms/2ml ampolues

what volume needs to be given

Answer 9

500 diviided by 25 is 20
2 divide 20 is 0.1ml

Question 10

enxoparin at dose of 1.5mg/kg or 150units/kg
what dose do you give in obth mg and units

50kg man

Answer 10

75mg

7500 units