Figure 3.

Correlation between stone comminution and ${\stackrel{‒}{P}}_{+\left(avg\right)}$ and ${\stackrel{‒}{E}}_{eff}$ in water and 1,3- butanediol after 1000 shocks for three size groups: 4 mm (green), 7 mm (blue) and 10 mm (red). The ${\stackrel{‒}{P}}_{+\left(avg\right)}$ and ${\stackrel{‒}{E}}_{eff}$ thresholds for each size group are indicated by arrows. Note ${\stackrel{‒}{P}}_{+\left(avg\right)}$ and ${\stackrel{‒}{E}}_{eff}$ and normalized P_+(avg) and E_eff, respectively. Four samples were used under each specific test condition and at each location in the lithotripter field.