Table 1 Suppl.

Needle and syringe characteristics

Variables	Diameter (mm)	Length (mm)
Needle characteristics
26G needle (original from 1 mL syringe)	0.45	13
23G needle (original from 3 mL syringe)	0.65	32
22G needle (original from 5 mL syringe)	0.7	38
21G needle (original from 10 mL syringe)	0.8	38
27G needle	0.4	13
27G spinal needle	0.42	88
30G needle	0.3	13
Syringe characteristics
1 mL syringe	OD 6.75; ID 4.75	72.1
3 mL syringe	OD 10; ID 9.15	60
5 mL syringe	OD 14.05; ID 13.3	58.5
10 mL syringe	OD 17.2; ID 16.15	75
20 mL syringe	OD 21.7; ID 20.3	93.45

OD (outer diameter), ID (inner diameter)