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Year 3 Medicine Block > PSA fluids > Flashcards

Flashcards in PSA fluids Deck (15)
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1
Q

How much Na+ in 1L of 0.9% sodium chloride?

A

150mmol
(i.e. 150mmol/L)

2
Q

How much K in KCl 0.3% 1000ml?

i.e 1L

A

40mmol K

3
Q

How much K in KCl 0.15% 1000ml?

i.e 1L

A

20mmol K

4
Q

How much glucose in 5% 1000ml

i.e. 1L

A

50g glucose

Note: Can also work this out if can’t remember
–> glucose 5% in 1000ml = 5% of 100ml = 5g
–> x by 10 to get 1000ml = 50g.

can also do 0.05 x 1000 (percentage glucose x volume) = 50g

5
Q

In fluid prescribing, what are requirements of water, Na and K, and glucose? :

  1. ?ml/kg/24hr water
  2. ?mmol/kg/24hr Na and K
  3. ?g/24hr glucose
A
  1. 25-30ml/kg/24hr of water
  2. 1mmol/kg/24hr of Na and K
  3. 50-100g/24hr of glucose
6
Q

What is maximum rate of K per hour?

A

10mmol/hr

so if need to give 40mmol K - minimum time to do this over would be 4 hours.

40mmol / 10 = 4 hrs

7
Q

For fluid maintenance only, what volume should you aim to give over 8-12 hrs?

A

aim for 1000ml over 8-12 hrs
(rate would be 83 ml - 125 ml / hr)

8
Q

For fluid maintenance and replacement, what volume should you aim to give over 4-6 hrs?

A

aim for 1000ml over 4-6 hours.

9
Q

What is your prescription for emergency resuscitation fluids?

A

Sodium chloride 0.9% 500ml over 15 mins

(250ml if elderly)

10
Q

What is your fluid prescription for emergency hypoglycaemia?

A

glucose 20% 100ml over 15mins

11
Q

What is your fluid prescription for emergency hypokalaemia?

A

sodium chloride 0.9% potassium chloride 0.3% 1000ml over 4hrs

12
Q

What is your fluid prescription for emergency hypercalcaemia?

A

sodium chloride 0.9% 1000ml over 4hrs

13
Q

What is your fluid prescription for maintenance fluids without deficits or losses?

A

maintenance fluids only
* 25-30ml/kg/24hrs water
* 1mmol/kg/24hr Na and K
* 50-100g/24hr glucose

Aim for 1000ml over 8-12 hrs

14
Q

What is your fluid prescription for maintenance fluids with deficits or losses? e.g. Na or K low, vomiting, diarrhoea

A

need maintenance and replacement
- minimum 30ml/kg/24hrs water
- ensure electrolytes are replaced
- aim for 1000ml over 4-6hrs.

15
Q
A

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