Table 1
 Characteristics of five commonly used intravenous cannulae
Cannula
Gauge
Diameter (mm)
Length (mm)
Volume of cannula (mm
3
)
Blue
22
0.8
25
12.6
Pink
20
1.0
32
25.1
Green
18
1.2
45
50.9
Grey
16
1.7
45
102.1
Orange
14
2.0
45
141.3