초록 ▼

A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The cannula has an improved inexpensive flexible flapper valve and can be manufactured with a reusable cannula tube but disposable flapper valve assembly to minim

A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The cannula has an improved inexpensive flexible flapper valve and can be manufactured with a reusable cannula tube but disposable flapper valve assembly to minimize cost.

대표청구항 ▼

[ We claim:] [1.] A cannula comprising:(a) a cannula tube with an outer surface and an interior lumen, and having a forward distal end and a rearward proximate end, wherein said lumen has an enlarged cavity portion intermediate said distal end and said proximate end;(b) a shelf extending inwardly fr

[ We claim:] [1.] A cannula comprising:(a) a cannula tube with an outer surface and an interior lumen, and having a forward distal end and a rearward proximate end, wherein said lumen has an enlarged cavity portion intermediate said distal end and said proximate end;(b) a shelf extending inwardly from the cannula tube in the enlarged cavity portion defining a flapper valve aperture;(c) a flapper valve, mounted adjacent to and forward of said shelf, having an integral hinge and a flapper formed of elastomeric material, and wherein the size of said flapper is larger than the flapper valve aperture; and(d) a hard button located on the flapper wherein the size of the hard button is smaller than the flapper valve aperture.