Figure 2.

Thrombosis 3D bioprinted model designed by Zhang and coworkers from [108] with permission. Sacrificial bioprinting of vascularized hydrogels. (A) Schematic representation of the bioprinting process steps (i–vi) and (B) corresponding photographs of: (i) and (ii) bioprinting of a Pluronic template; (iii) template drying placed on a PDMS support; (iv) GelMA filling and ultraviolet crosslinking; (v) dissolution of the sacrificial channels; (vi) final construct with hollow channels. (C) Visualization of hollow microchannels endothelialization inside the GelMA construct: (i) linear and (ii) bifurcating microchannels; (iii) CD31 (green) and nuclei (blue) staining of the confluent layer of HUVECs.