USES FLOW RATE LENGTH SIZE COLOR
(mm)
(ml/min)
IV THERAPY
14G
16G
18G
45
45
32
32
25
19
240
180
90
60
36
20
Routine
Blood
Surgery
Routine
Blood
Small Veins
Peds
Routine
Peds
Trauma
Rapid Blood
Rapid Blood
Surgery
Surgery
20G 22G 24G
Important Points: Check facility protocols. In general blood should not be given in a
catheter <20G. Keep in mind the a smaller gauge # means a larger
IV catheter. Most adult patients will need an 18G or 20G. Always
consider what fluids the patient will be receiving before determining
size.
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