A process for preparing a curable polyester based emulsion is provided in embodiments, containing one or more unsaturated polyesters and one or more photoinitiators obtained by a phase inversion process, in which the particle size and particle size distribution is controlled by process parameters, such as solvent, solvent ratio, neutralization ratio of the resin and temperature. Embodiments of the embolism deflecting device comprise an embolism detector, a diverter controller operable for determining the presence of emboli from a target input from the embolism detector, and an embolism diverter operable by the diverter controller to deflect, divert, redirect, etc. An O-ring is seated on an annular groove which is provided in the vicinity of the through-hole.