Experimental model. SEM images of the electrospun PLGA/PCL nerve guide conduit (A) and magnified details of the tube wall (B): microfibers and nanofibers range in diameter from approximately 280 nm to 8 μm. The non-woven fibrous microstructure is characterized by small pores (700 nm) and large pores (20 μm). (C) Micrograph of sham-operated rat sciatic nerve (experimental group 1). (D) Micrograph of prosthesis implanted, filled with saline solution and sutured to the transected nerve (experimental group 3).