Figure 9. Empirical parameters applied to the mathematical model:

(a) scaled strength A = 500, shape factor k = 1.5, scale parameter λ = 10 day, and phase lag T = 1.5 day for the Weibull function, (b) source term S(r, t), radius R = 0.42 mm for a modified gauge-18 indwelling needle, (c) the fitted initial condition c(r, 0) = 0.1 + 0.8 exp(−0.16r^1.5).