Specimen retrieval apparatus

• US 7,547,310 B2
• Filed: 03/29/2005
• Issued: 06/16/2009
• Est. Priority Date: 03/29/2005
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Whitfield, Kenneth H.
• Primary Examiner(s): Ho; (Jackie) Tan-Uyen T.
• Assistant Examiner(s): TYSON, MELANIE RUANO
• Application Number:
  US11/092,350
• Publication Number:
  US 20060229640A1
• Time in Patent Office: 1,540 Days
• Field of Search: 606/114, 606/113
• US Class Current: 606/114
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/00287 Bags for minimally invasive surgery
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

A specimen removal apparatus includes a pouch assembly fabricated from a flexible membrane, a pouch support, a drawstring having a knot and forming a noose disposed circumferentially around a mouth of the pouch assembly, an endoscopic tubular portion, and a drive rod. The pouch support includes a rocker arm assembly attached to a distal end of the drive rod. Proximal pulling of the drawstring closes the noose, thereby closing the mouth of the pouch assembly. The pouch assembly is detachable from the apparatus.

Claims

1. A surgical apparatus for removing tissue from an interior portion of a body during a surgical procedure comprising:

an elongate tubular member having an open distal end and a bore therein, the bore defining a longitudinal axis therethrough;

a pouch support movable between a proximal end location at least partially within an endoscopic portion and a distal location at least partially exterior to said endoscopic portion, said pouch support including at least one flexible strip attached to a rocker arm assembly, the at least one strip generally having an arcuate configuration when in a deployed state, the rocker arm assembly having a base with a pair of rocker arms pivotably attached thereto, the base having a single mounting arm for attaching the pouch support to the elongate tubular member, each rocker arm having a slot for receiving an end of the at least one strip, wherein as the rocker arms pivot away from each other the pouch support transitions from a closed configuration towards an open configuration;

a pouch removably attached to said pouch support, said pouch having a first end movable between the open configuration and the closed configuration, and a closed second end;

a drive member slidably disposed within said bore for moving said pouch support from said proximal location to said distal location, said support being attached to a distal end of said drive member; and

a drawstring for moving said first end of said pouch from said open configuration to said closed configuration.

2. The apparatus of claim 1, wherein the at least one flexible strip comprises a spring biased toward the deployed state.

3. The apparatus of claim 1, wherein the at least one flexible strip comprises a pair of flexible strips, each of the flexible strips having a first end attached to the rocker arm assembly.

4. The apparatus of claim 3, wherein each of the flexible strips has a second end engaged by a joiner.

5. The apparatus of claim 1, further comprising a locking tab having a locking position in engagement with the drive member and a releasing position disengaged from the drive member.

6. The apparatus of claim 5, further comprising a handle at a distal end of the tubular member, the handle slidably supporting the locking tab.

7. The apparatus of claim 1, further comprising an actuator attached to the drawstring for moving the first end of the pouch.

8. The apparatus of claim 1, wherein the pouch comprises a sheet of substantially transparent material.

9. The apparatus of claim 1, wherein the pouch has an upper circumferential tubular portion for receiving the at least one flexible strip.

10. The apparatus of claim 9, wherein the pouch has a lower circumferential tubular portion for receiving the drawstring.

11. The apparatus of claim 10, wherein the pouch has a weakened portion disposed between the upper and lower circumferential tubular portions.