Surgical tissue retrieval instrument and method of use of a surgical tissue retrieval instrument
View Patent ↗A surgical tissue retrieval instrument has a collapsible pouch at the distal end of an elongated pusher rod that is introduced into a patient through a cannula. The instrument includes a two-jaw fork that forms a loop when in an unconstrained configuration and that supports the pouch. Deployment and operation of the fork and the pouch are controlled by a securing mechanism. The two jaws and the securing mechanism are slid in a hem surrounding the opening of the pouch when the device is assembled.
1. A tissue retrieving device comprising:
a) a sleeve having a proximal end and a distal end, said distal end adapted for insertion in a cannula;
b) a rod in slidable communication with said sleeve, said rod having a distal end supporting a post rotating around a pivot wherein said post has a u-shape rotating around an open end of the u-shaped post and laterally biased jaws and a proximal end comprising a handle to manipulate the rod, wherein the rod has a first position relative to the sleeve during pouch deployment wherein the post remains partially within the sleeve and a second position relative to the sleeve for releasing the pouch from the laterally biased jaws and post wherein the post is completely outside of the sleeve; and
c) a pouch in slidable communication with the jaws and the u-shaped post wherein said jaws and the u-shaped post is a means for deployment and control of repeated opening and closing of said pouch.
2. The device as recited in claim 1 wherein said jaws are of unequal length.
3. The device as recited in claim 1 wherein the pouch further comprises a channel adapted to simultaneously receive a drawstring and said jaws.
4. The device as recited in claim 3 wherein said u-shaped post rotates in a plane perpendicular to a plane containing said jaws.
5. The device as recited in claim 4 wherein said rotation stops when said u-shaped post contacts the distal end of said rod.
6. The device as recited in claim 1 wherein said u-shaped post causes said jaws to disengage from said pouch.
7. The device as recited in claim 1 wherein said jaws are introduced into the patient's body through said sleeve.
8. The device as recited in claim 1 wherein said u-shaped post and said sleeve are in frictional engagement with each other when said rod is slidably received by said sleeve.
9. The device as recited in claim 1 , further comprising a spring biasing said u-shaped post towards the distal end of said pusher rod.