Table 1.

Hole diameters and radial stretch ratios for varying gauge needles inserted at a fast insertion speed (1.8 mm/s)

Needle gauge	Outer diameter of needle (mm)	Hole diameter (mm)	Radial stretch ratio ${\lambda }_r$
28	0.365	0.257$\hspace{1em}\pm \hspace{1em}$0.023	0.716$\hspace{1em}\pm \hspace{1em}$0.064
22	0.717	0.548$\hspace{1em}\pm \hspace{1em}$0.040	0.763$\hspace{1em}\pm \hspace{1em}$0.055
20	0.908	0.643$\hspace{1em}\pm \hspace{1em}$0.047	0.708$\hspace{1em}\pm \hspace{1em}$0.052