Other

Daniel M Gudeman

Kevin Alika Farley

This invention relates to a surgical cannula that has a simple ball valve assembly comprising a ball, rotatably mounted on an axle extending between opposing legs of a pivotable yoke, which engages a seat to seal the instrument inlet to the cannula passageway when a trocar instrument is removed and moves out of the path of the instrument during insertion thus avoiding wear and strain on the valve and the instrumentation.

Surgical cannula with ball valve

A trocar has an elongated body with a frustro-conical end which terminates in a blunt tip. A plurality of blades are radially attached to a blade housing connected to the trocar body. In one embodiment the blade housing moves toward the trocar body in response to a force causing the blades to extend to a cutting position. When the force is removed the blades return to a retracted position.

Trocar having blunt tip

An improved cannula for providing access to a body passage for inserting instruments. The cannula of the present invention includes an improvement in the form of a biased ball valve for sealing the inlet of a housing attached to the proximal end of the cannula. The ball valve includes a seal member with an upwardly curved portion that is biased towards a second seal portion at a second end of the housing whereby the ball seats and seals the inlet to the housing cavity.

Growing community of inventors

Barrington, IL, United States of America

Daniel M Gudeman