Retrieval device

• US 9,730,716 B2
• Filed: 11/07/2016
• Issued: 08/15/2017
• Est. Priority Date: 05/18/2001
• Status: Active Grant

• Current Assignee: United States Endoscopy Group Incorporated
• Original Assignee: United States Endoscopy Group Incorporated
• Inventors: Secrest, Dean J., Younker, Marlin E.
• Primary Examiner(s): HOLWERDA, KATHLEEN SONNETT
• Application Number:
  US15/344,915
• Publication Number:
  US 20170086866A1
• Time in Patent Office: 281 Days
• Field of Search: 606110, 606113, 606114
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• 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

An endoscopic surgical device for retrieving severed tissue or foreign bodies from within a subject is disclosed. The device comprises a support unit and a tissue retrieving net system. The net system is carried by the support unit and may be inserted into the subject through an orifice or small incision and operated to retrieve tissue that has been severed by a conventional method. The net system comprises a net, a net actuator, a net deployment and retrieval assembly for transmitting motion between the net and its actuator. The net system further comprises at least one net connector disposed such that only one connector is within an articulation zone, defined by locations of severe bending of the device during operation.

Claims

1. An endoscopic surgical device for retrieving severed tissue or foreign bodies from within a human body, the device comprising:

a. a support unit comprising;

i. a body having a first passage therethrough, and

ii. an elongated introducer member having a first end section proximal and fixed with respect to said body and a second end section remote from the body, the introducer member having a second passage aligned with the first passage and opening at said second end section; and

b. a tissue retrieving net system comprising;

i. a net comprising a wire-like resilient loop and a net element having a mouth section slidably disposed on the loop and a tissue receiving pouch section, said loop terminating with two relatively parallel loop cables, said net disposed adjacent said second end section for deployment and retraction through said opening;

ii. a net deployment and retrieval assembly extending substantially through said first and second passages and connected to the net, said assembly comprising a motion transmitting member extending in said second passage to said loop; and

iii. a net actuator unit comprising a first handle fixed with respect to said body and a second handle fixed with respect to said motion transmitting member and movable relative to said first handle so that shifting the second handle relative to said first handle shifts said net into and out of said opening;

c. said second passage having a diametrical extent substantially smaller than the width of said loop as deployed, said introducer member engaging said loop at said opening and resiliently collapsing and elongating said loop as said net is retracted and moves into said second passage, said loop resiliently returning to its uncollapsed configuration as it is deployed;

d. said net system further comprising a connector, wherein the connector secures each loop cable;

e. wherein with respect to said support unit, a proximal portion of said net element directly contacts and is secured to the two relatively parallel loop cables.

2. The endoscopic surgical device of claim 1, wherein with respect to said support unit, the proximal portion of said net element is secured to the two relatively parallel loop cables at a location adjacent a shoulder of the connector.

3. The endoscopic surgical device of claim 2, wherein with respect to said support unit, the proximal portion of said net element is secured to the two relatively parallel loop cables at a location adjacent a proximal shoulder of the connector.

4. The endoscopic surgical device of claim 1, wherein the connector holds the two relatively parallel loop cables together.

5. An endoscopic surgical device for retrieving severed tissue or foreign bodies from within a human body, the device comprising:

a. a support unit comprising;

i. a body having a first passage therethrough, and

ii. an elongated introducer member having a first end section proximal and fixed with respect to said body and a second end section remote from the body, the introducer member having a second passage aligned with the first passage and opening at said second end section; and

b. a tissue retrieving net system comprising;

i. a net comprising a wire-like resilient loop and a net element having a mouth section slidably disposed on the loop and a tissue receiving pouch section, said loop terminating with two relatively parallel loop cables, said net disposed adjacent said second end section for deployment and retraction through said opening;

ii. a net deployment and retrieval assembly extending substantially through said first and second passages and connected to the net, said assembly comprising a motion transmitting member extending in said second passage to said loop; and

iii. a net actuator unit comprising a first handle fixed with respect to said body and a second handle fixed with respect to said motion transmitting member and movable relative to said first handle so that shifting the second handle relative to said first handle shifts said net into and out of said opening;

c. said second passage having a diametrical extent substantially smaller than the width of said loop as deployed, said introducer member engaging said loop at said opening and resiliently collapsing and elongating said loop as said net is retracted and moves into said second passage, said loop resiliently returning to its uncollapsed configuration as it is deployed;

d. said net system further comprising a first connector and a second connector, wherein with respect to said support unit, proximal ends of the two relatively parallel loop cables are secured to a distal end of the motion transmitting member by the first connector, distal ends of the two relatively parallel loop cables are secured to each other by the second connector;

e. wherein with respect to said support unit, a proximal portion of said net element directly contacts and is secured to the two relatively parallel loop cables.

6. The endoscopic surgical device of claim 5, wherein with respect to said support unit, the proximal portion of said net element is secured to the two relatively parallel loop cables at a location adjacent a shoulder of the second connector.

7. The endoscopic surgical device of claim 6, wherein with respect to said support unit, the proximal portion of said net element is secured to the two relatively parallel loop cables at a location adjacent a proximal shoulder of the second connector.

8. The endoscopic surgical device of claim 5, wherein the second connector holds the two relatively parallel loop cables together.