| 摘要 |
A cannula system is described. The cannula system may be formed of biocompatible materials that are suitable to be sterilized. Accordingly, the cannula system may be reusable for a relatively large number of surgical procedures assuming conventional sterilization techniques are employed after each surgical procedure. Additionally, the cannula system may be provided with an internal valve system disposed in a port portion thereof wherein the valve system may be operable to receive the trocar there through, as well as maintaining insufflation of the body cavity. Furthermore, the cannula system may be provided with a plurality of rib members formed on an external surface of the cannula shaft, wherein the rib members may engage the tissues adjacent the incision, thus maintaining the position of the cannula shaft and reducing and/or lessening relative movement of the cannula shaft. |
| 主权项 |
1. A cannula system, comprising:
a cannula member having a proximal portion and a distal portion, wherein the cannula member includes an area defining a through bore extending from the proximal portion to the distal portion; a port member having a proximal portion and a distal portion, wherein the port member includes an area defining a through bore extending from the proximal portion to the distal portion, wherein the distal portion of the port member is operable to threadingly engage and at least partially receive the proximal portion of the cannula member; a valve member having a proximal portion and a distal portion, wherein the valve member is operable to be at least partially received within the proximal portion of the port member, wherein the valve member includes an area defining an annular groove formed on an internal surface of a proximal portion thereof; a retainer member having a proximal portion and a distal portion, wherein the retainer member includes an area defining a through bore extending from the proximal portion to the distal portion, wherein the distal portion of the retainer member is operable to be at least partially received within the proximal portion of the valve member, wherein the retainer member includes an annular flange member formed on an external surface of a distal portion thereof, wherein the annular flange member of the retainer member is operable to releasably engage and be received in the annular groove of the valve member, wherein the retainer member includes an area defining an annular groove formed on an external portion of a proximal portion thereof; and a seal member, wherein the seal member includes an area defining a bore formed in a surface thereof, wherein the seal member is operable to envelop the proximal portion of the retainer, wherein the seal member includes an annular flange member formed on an internal surface of a distal portion thereof, wherein the annular flange member of the seal member is operable to releasably engage and be received in the annular groove of the retainer member; wherein, when the annular flange member of the retainer member releasably engages the annular groove of the valve member and the annular flange member of the seal member releasably engages the annular groove of the retainer member, the valve member, retainer member and seal member are held in a fixed relationship to one another. |
