Tissue retrieval device with bladders

1. A surgical instrument for removal of material from a patient, the surgical instrument comprising:

a. a handle assembly;

b. an introducer tube, wherein the introducer tube is sized for insertion through a trocar, wherein the introducer tube comprises a proximal end and a distal end, wherein the proximal end of the introducer tube is in communication with the handle assembly, wherein the introducer tube includes an aperture proximally spaced from the distal end of the introducer tube, wherein the introducer tube further includes one or more indentations formed at the distal end of the introducer tube;

c. a retrieval bag, wherein the retrieval bag is positionable at the distal end of the introducer tube, wherein the retrieval bag has an inflatable portion, wherein the retrieval bag is configured to receive a tissue specimen;

d. an actuator rod slidably disposed in the introducer tube; and

e. a distal plug at the distal end of the actuator rod, wherein the distal plug includes a resilient tab, wherein the actuator rod is translatable from a proximal position to a distal position to push the distal plug distally and thereby deploy the retrieval bag from the introducer tube;

wherein the aperture of the introducer tube is configured to engage and receive the resilient tab of the distal plug to restrict proximal movement of the distal plug when the actuator rod reaches the distal position

wherein the one or more indentations of the introducer tube are configured to restrict distal movement of the distal plug when the actuator rod reaches the distal position.

2. The surgical instrument of claim 1 , wherein the retrieval bag defines an opening having a perimeter, wherein the inflatable portion comprises an annular bladder positioned about the perimeter of the opening.

3. The surgical instrument of claim 2 , wherein the retrieval bag is formed by at least two adjacent layers of material, wherein the annular bladder is formed by portions of the two adjacent layers of material being separable from each other along a first region, wherein the two adjacent layers of material are inseparable from each other along a second region.

4. The surgical instrument of claim 1 , wherein the retrieval bag has a length extending transversely relative to the introducer tube, wherein the inflatable portion comprises at least one rib bladder extending along at least part of the length of the retrieval bag.

5. The surgical instrument of claim 4 , wherein the retrieval bag is formed of a material resiliently to assume a contracted configuration, such that the retrieval bag has a substantially flat and closed configuration when the at least one rib bladder is un-inflated, wherein the at least one rib bladder is configured to expand the retrieval bag to a substantially elongate and open configuration when the at least one rib bladder is inflated.

6. The surgical instrument of claim 1 , wherein the retrieval bag is formed by at least two adjacent layers of material, wherein the retrieval bag has a length, wherein the two adjacent layers of material extend along the length of the retrieval bag, wherein the two adjacent layers of material are substantially loose relative to each other, such that the two adjacent layers of material define the inflatable portion between the two adjacent layers of material.

7. The surgical instrument of claim 6 , wherein the inflatable portion is configured to substantially enclose a tissue specimen within the retrieval bag upon inflation of the inflatable portion.

8. The surgical instrument of claim 1 , further comprising an inflator in fluid communication with the retrieval bag, wherein the inflator is operable to communicate a fluid medium to the inflatable portion of the retrieval bag to inflate the inflatable portion of the retrieval bag.

9. The surgical instrument of claim 8 , wherein the inflator is secured to the handle assembly.

10. The surgical instrument of claim 8 , wherein the inflator comprises a rod extending through the handle assembly, wherein the rod is translatable within the introducer tube to communicate a fluid medium to the inflatable portion of the retrieval bag to inflate the inflatable portion of the retrieval bag.

11. The surgical instrument of claim 8 , further comprising a fluid conduit, wherein the fluid conduit is configured to couple the inflatable portion with the inflator.

12. The surgical instrument of claim 1 , wherein the retrieval bag is positioned within the introducer tube when the actuator rod is in the proximal position, wherein the retrieval bag extends from the distal end of the introducer tube when the actuator rod is in the distal position.

13. The surgical instrument of claim 1 , further comprising a resilient frame, wherein the resilient frame is positionable at the distal end of the introducer tube, wherein the retrieval bag is secured to the resilient frame.

14. The surgical instrument of claim 13 , wherein the resilient frame extends distally from the actuator rod.

15. The surgical instrument of claim 14 , wherein the resilient frame is collapsibly positioned within the introducer tube when the actuator rod is in the proximal position, wherein the resilient frame extends from the distal end of the introducer tube when the actuator rod is in the distal position.

16. The surgical instrument of claim 13 , wherein the resilient frame comprises a resilient hoop member.

17. The surgical instrument of claim of claim 1 , wherein the retrieval bag is sensitive to an environmental condition such that exposure of the retrieval bag to the environmental condition causes the retrieval bag to expand.

18. The surgical instrument of claim 1 , wherein the handle assembly comprises a pair of finger grips.

19. The surgical instrument of claim 18 , wherein the actuator rod comprises a thumb ring disposed at the proximal end of the actuator rod, wherein the thumb ring is disposed proximal to the pair of finger grips of the handle assembly.