Patent ID: 8821383

Claim:
A slotted cannula for endoscopic surgical procedures, comprising: a tubular body comprising: a distal end; a proximate end; an outer surface; an open slot extending longitudinally from the beginning of the proximate end to the proximity of the distal end; and a pair of substantially cylindrical, non-flexible wings integrally formed on the proximate end, on opposing edges of the slot and separately protruding outward from the outer surface of the tubular body radially along different axes that pass through the longitudinal centerline of the cannula and at an angle to one another and wherein no longitudinal plane through the centerline of the cannula passes through both wings, wherein the tubular body is made from a transparent polymer material and has an inner diameter that accommodates an endoscope, wherein the transparent polymer material allows the observation of anatomical structure around an insertion path of the cannula.