Surgical Access Device with Adjustable Cannula
A surgical access device is provided having a cannula and obturator. The cannula has a housing and tube section with an anchor located about the tube section. The obturator has a mechanism to deploy the anchor and adjust the cannula length. The anchor is moveable between a deployed and undeployed state where the undeployed state facilitates insertion and removal of the access device and the deployed state assists in fixation of the cannula in an anatomic structure. Anchor deployment is independent of cannula length adjustment.
1 - 20 . (canceled)
21 . A method for accessing an anatomic structure, the method comprising:
a) obtaining a handle adapted to receive a cannula, the cannula having an anchor disposed about its distal end; the handle having an obturator adapted to engage the anchor; a button in communication with the obturator wherein the button is adapted to collapse the anchor about the cannula in a first position and deploy the anchor in a second position;
b) inserting the obturator into the cannula;
c) inserting the cannula through the wall of anatomic structure;
d) moving the button from the first position to the second position to deploy the anchor.
22 . The method of claim 21 , further comprising the step of removing the obturator from the cannula.
23 . The method of claim 22 , wherein the anchor is biased to a deployed state.
24 . The method of claim 23 , wherein the cannula is flexible.
25 . The method of claim 24 , wherein the obturator has a detent in communication with a lever lock on the handle.
26 . The method of claim 21 , wherein distal movement of the handle relative to the cannula causes the cannula to expand radially.
27 . A method of accessing an anatomic structure, the method comprising:
a) obtaining a surgical trocar comprising a handle, a first button and a second button; a flexible cannula having a length and a diameter wherein the cannula is biased to a first length; an anchor disposed about the cannula; an obturator moveably attached to the handle, the obturator adapted to engage the anchor and cannula; the obturator having a pin to engage the first button;
b) inserting the obturator into the cannula until the obturator pin engages the first button, thereby stretching the cannula to a second length;
e) inserting the cannula into an anatomic structure; and
f) depressing the first button wherein the cannula bias moves the cannula from the second length the first length.
28 . The method of claim 27 , further comprising the step of removing the handle from the cannula.
29 . The method of claim 27 , wherein the step of depressing the first button deploys the anchor.
30 . The method of claim 27 , wherein the cannula has a housing and a valve.