Patent ID: 10322030

Abstract:
The infusion cannula system for pars plana vitrectomy includes a port (100) mounted over a sclerotomy on the patient's eye (200) and an infusion cannula assembly (400) adapted for connection to a vitrectomy machine that maintains pressure in the eye during the procedure. The port (100) includes an external cylindrical shell (10) that is kept stationary and an internal hub (14) having an insertion tube (17) extending therefrom. The internal hub (14) is threadable into the cylindrical shell (10) in increments to control the depth of penetration of the insertion tube (17) through the sclerotomy incision into the vitreous cavity. The infusion cannula (25) is introduced into the eye (200) through the insertion tube (17) to the desired depth. The internal hub (14) may have a pointer (15) that points to calibration indicia on the cylindrical shell (10) corresponding to the depth of insertion of the infusion cannula (25).