TROCAR AND METHOD FOR PRODUCING SAME

摘要

A trocar has an insertion tube. A tube outlet of the insertion tube communicates with a collar of the insertion tube. An incision blade is provided to the tube outlet. The tube outlet opens toward the incision blade. The incision blade can thereby be inserted into an eyeball to form an incision, and the insertion tube can be inserted in the eyeball through the incision while the incision blade remains in the eyeball. Two lateral blade edges extend from a distal blade edge in the incision blade. The blade edges have outermost blade edges located in an outer region, which is a boundary surface, which includes the inner circumferential surface of the tube outlet. Therefore, the width dimension of the incision blade can be set greater than the inner diameter of the insertion tube.

主权项

1. A trocar comprising an insertion tube, wherein
the insertion tube includes:
a tube inlet located at a proximal end of the insertion tube; anda tube outlet that communicates with the tube inlet and is located at a distal end of the insertion tube, the insertion tube includes an incision blade at the distal end, the tube outlet opens toward the incision blade, and the incision blade includes:
a distal blade edge, which starts to incise an affected area when the distal blade edge is inserted in the affected area; andan outer blade edge that extends from the distal blade edge toward the tube outlet of the insertion tube, the insertion tube is divided into an inner region, which is inside a boundary surface along an inner circumferential surface of the tube outlet, and an outer region, which is outside the boundary surface, and the outer blade edge includes an outermost blade edge located in the outer region.