IV Fluids Flashcards
Definition of crystalloid
Small molecules that dissociate into ions and form true solutions
Number of moles of calcium in calcium chloride and gluconate
Chloride - 0.68mmol/ml
Gluconate 0.22mmol/ml
Potential Effect of calcium gluconate on cardiac function
Can be negatively inotropic and cause coronary vasospasm
Why is bicarb expensive
Usually fluids steralised by heat
If this is done to bicarb produces co2 thus lost
Thus bicarb must be filtered. Expensive
Osmolality of 0.9%nacl
Osmolality of na bicarb 8.4%
Nacl 300
Na bicarb 2000 (!)
How many mmol of na in 1L Na bicarb
1000
Which of colloids or crystalioids has the most impact on the freezing and boiling points of their solute
Crystalloids as lower number of molecules in colloids
Why do colloids also have electrolytes in them
Little osmotic pressure (all oncotic from the large molecules) so needs electrolytes to achieve is osmolality
mmol/l of na in has 4.5 and 20%
100-160
50-120
Ph of HAS
6.4 to 7.4
Ph of 0.9% nacl
Dextrose
5
4
Instance of serious adverse reactions to human albumin, gelofusin and dextran 70
Has 1:30,000
Gelofusin 1:13,000
Dextran 70 1:4500
How are gelatins made
Example
Molecular weight of gelatin
Hydrolysing collagen
Gelofusin
30000 daltons
Mmol of calcium in gelofusin and hartmanns
Gels 0.4 mmol/l
Hartmanns 2mmol/l
Constituents of dextran 70
Molecular weight
Dextrans (glucose polymers) in sodium chloride
Ave 70000 daltons
