REDEPLOYABLE TISSUE RETRIEVAL BAG
A tissue retrieval system including a tissue retrieval bag deployable by an actuator from an introducer and suspended in an open configuration by support arms can be serially redeployed between a partially or fully stowed configuration and a first deployed configuration to be used in procedures to collect multiple samples. The redeployable tissue retrieval bag can include an attachment tab at an upper proximal portion to which a bead is coupled. The upper proximal portion is configured to significantly reduce stress concentrations during redeployment cycles of the tissue retrieval bag. For example, the upper proximal portion can be aligned with a proximal edge of the tissue retrieval bag. The upper proximal portion can further include a radiused profile including a relatively large radius to reduce stress concentrations.
1 . A tissue retrieval system comprising:
a tubular introducer having a proximal end and a distal end and defining a central longitudinal axis between the proximal end and the distal end, the tubular introducer having a lumen extending between the proximal end and the distal end;
an actuator longitudinally slidable within the lumen of the introducer, the actuator having a proximal end and a distal end;
a pair of support arms extending distally along the central longitudinal axis from the distal end of the actuator;
a tissue retrieval bag removably coupled to the support arms, the tissue retrieval bag having an open end and a closed end opposite the open end, the tissue retrieval bag comprising:
a cuff extending longitudinally at the open end between a proximal end of the open end and a distal end of the open end, the cuff configured to receive the pair of support arms; and
an upper proximal portion positioned at the proximal end of the cuff and extending transversely to the longitudinal axis in a direction longitudinally proximally and away from the closed end; and
a bead coupled to the upper proximal portion, the bead configured to slidably receive the pair of support arms.
2 . The tissue retrieval system of claim 1 , wherein the tissue retrieval bag comprises a distal edge extending from the open end at the distal end of the cuff to the closed end.
3 . The tissue retrieval system of claim 2 , wherein the distal edge comprises a folded edge.
4 . The tissue retrieval system of claim 1 , wherein the tissue retrieval bag comprises a proximal edge extending from the open end at the proximal end of the cuff to the closed end.
5 . The tissue retrieval system of claim 4 , wherein the proximal edge comprises a welded seam.
6 . The tissue retrieval system of claim 5 , wherein the upper proximal portion comprises an upper edge and a lower edge opposite the upper edge.
7 . The tissue retrieval system of claim 6 , wherein the lower edge is colinear with the proximal edge.
8 . The tissue retrieval system of claim 6 , wherein the upper edge comprises a radiused profile.
9 . The tissue retrieval system of claim 8 , wherein the radiused profile has a first radiused portion having a first radius, a second radiused portion having a second radius, and a transition profile.
10 . The tissue retrieval system of claim 9 , wherein the first radius is larger than the second radius.
11 . The tissue retrieval system of claim 1 , wherein the tissue retrieval bag is operable between a stowed position in which the tissue retrieval bag is positioned within the introducer and a first deployed position in which the tissue retrieval bag is deployed from the introducer and coupled to the support arms such that longitudinal movement of the actuator within the lumen repeatably actuates the tissue retrieval bag between an open configuration and a closed configuration.
12 . A tissue retrieval system comprising:
a tubular introducer having a proximal end and a distal end and defining a central longitudinal axis between the proximal end and the distal end, the tubular introducer having a lumen extending between the proximal end and the distal end;
an actuator longitudinally slidable within the lumen of the introducer, the actuator having a proximal end and a distal end;
a pair of support arms extending distally along the central longitudinal axis from the distal end of the actuator;
a tissue retrieval bag removably coupled to the support arms, the tissue retrieval bag having an open end and a closed end opposite the open end and defining a depth axis extending from the open end to the closed end orthogonally to the central longitudinal axis, wherein the open end extends along the central longitudinal axis from a proximal end to a distal end, the tissue retrieval bag comprising:
a distal edge extending from the distal end of the open end to the closed end;
a proximal edge extending from the proximal end of the open end to the closed end, the proximal edge extending transversely to the central longitudinal axis; and
an upper proximal portion positioned at the proximal end of the open end and extending in a direction colinear with the proximal edge away from the closed end with respect to the depth axis; and
a bead coupled to the upper proximal portion, the bead configured to slidably receive the pair of support arms.
13 . The tissue retrieval system of claim 12 , wherein the tissue retrieval bag is formed of a sheet of material.
14 . The tissue retrieval system of claim 13 , wherein the proximal edge comprises a welded seam.
15 . The tissue retrieval system of claim 14 , wherein the upper proximal portion comprises an upper edge and a lower edge opposite the upper edge.
16 . The tissue retrieval system of claim 15 , wherein the lower edge comprises a welded seam that is colinear with the proximal edge.
17 . The tissue retrieval system of claim 15 , wherein the upper edge comprises a radiused profile.
18 . A tissue retrieval bag for use in a redeployable tissue retrieval system, the tissue retrieval bag comprising:
an open end extending along a central longitudinal axis from a proximal end of the open end to a distal end of the open end;
a closed end opposite the open end and defining a depth axis extending from the open end to the closed end orthogonally to the central longitudinal axis;
a distal edge extending from the distal end of the open end to the closed end;
a proximal edge extending from the proximal end of the open end to the closed end, the proximal edge extending transversely to the central longitudinal axis;
an attachment tab positioned at the proximal end of the open end and extending in a direction colinear with the proximal edge away from the closed end with respect to the depth axis; and
a bead coupled to the attachment tab.
19 . The tissue retrieval bag of claim 18 , wherein the attachment tab comprises a lower edge and an upper edge.
20 . The tissue retrieval bag of claim 19 , wherein the lower edge is colinear with the proximal edge.
21 . The tissue retrieval bag of claim 19 , wherein the upper edge comprises a radiused profile.