Surgical access device with pendent valve
View Patent ↗A surgical access device, such as a trocar, includes a pendent valve having an elongate structure extending from a proximal end to a septum valve disposed at a distal end. In operation, the elongate structure follows the angle of the instrument to pre-position the septum valve into the path of the instrument where it is not significantly challenged during instrument insertion or manipulation. The pendant valve can be made to float at both the proximal end and the distal end of the elongate structure, to further reduce the vulnerability of the septum valve. Since the valve is less vulnerable to instrument insertion, it can be formed to minimize friction and maximize the functional range of the access device.
1. A surgical access device having an axis extending between a proximal end and a distal end of the device, and extending through the device and being a working channel adapted to receive an instrument, the surgical access device comprising:
a valve housing disposed along the working channel;
a valve assembly disposed within the valve housing and including at least one valve;
a first floating structure coupled to the valve assembly proximally of the valve assembly;
the first floating structure having properties for floating the valve assembly relative to the valve housing generally along an arc, and
a second floating structure with properties for floating the valve assembly generally in a plane.
2. The surgical access device recited in claim 1 , wherein the valve assembly includes:
a guidance structure coupled to the valve and having properties for moving the valve in response to movement of the instrument within the working channel.
3. The surgical access device recited in claim 2 , wherein the guidance structure includes an elongate tube.
4. The surgical access device recited in claim 3 , wherein the tube has a diameter and a length greater than the diameter.
5. The surgical access device recited in claim 2 , wherein the guidance structure includes a zero valve.
6. The surgical access device recited in claim 3 , wherein the guidance structure includes a zero valve.
7. The surgical access device recited in claim 6 , wherein:
the valve has a proximal side and a distal side;
the tube is coupled to the proximal side of the valve; and
the zero valve is coupled to the distal side of the valve.