Table 3.

Calculations of local elastic moduli using eqs 3 and 4 where H = 200 μm (half the minimum spheroid diameter), a = −0.86 and b = −0.65⁶².

Needle diameter	Critical Pressure (kPa)
	Equation 3	Equation 4
30 μm	39	32
10 μm	73	67
5 μm	227	220