Patent US5486182A successfully refreshed from Google Patents.
US5486182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyp retrieval assembly with separable web member
Assignee: Granit Medical Innovations LLC
•
Filing: 1994-03-14
•
Granted: 1996-01-23
•
Expires: 2014-03-14
Abstract
Abstract A surgical instrument assembly for use in snare cauterization operations includes a tubular sheath member, a cauterization loop, and a wire operatively connected to the loop, the wire passing longitudinally through the sheath. An electrical supply is connected to the wire for feeding an electrical current to the loop, while an actuatable shifter is connected to the wire for sliding the wire along the sheath. A flexible web member is removably attached to the loop to form a capture pocket. During use the loop is passed over a polyp to be removed so that the web member substantially surrounds the polyp. The loop is then closed to engage the polyp around a base region thereof and an electrical current is conducted through the loop to burn through the polyp at the base region. The severed polyp is automatically captured by the web member. The web member is substantially separated from the loop allowing the loop to be retracted into the sheath while allowing the web member and captured polyp to remain outside the sheath.
Inventors
- 👤 Naomi L. Nakao
- 👤 Peter J. Wilk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:40
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B17/00; A61B17/32; A61B17/3205; A61B17/32056; A61B10/00; A61B10/02; A61B17/22; A61B17/22031; A61B18/1492; A61B17/00234; A61B2017/00287; A61B2018/1405; A61B2018/1407; A61B2018/141
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
193 words
An endoscopic surgical instrument for use in snare cauterization operations, comprising: a tubular sheath member; loop means made at least in part of an electrically conductive material for forming an alternately expandable and contractible cauterization loop; an electrically conductive wire operatively connected to said loop means and extending longitudinally through said sheath member, said wire being slidable longitudinally through said sheath; electrical connector means at a proximal end of said wire for coupling said wire to a source of electrical energy; a flexible web member connected to said loop means essentially around a circumference thereof to form a capture pocket, said loop means defining a mouth opening of said pocket, said web member being attached to said loop means in a manner so as to expose said loop means to enable effective cauterization of organic tissues by said loop means, said web member being removably attached to said loop means along a major portion thereof; and means on said sheath member at a distal end thereof for at least substantially separating said web member from said loop means upon a proximally directed stroke of said wire at the termination of a cauterization operation.
Claim 2
Dependent Claim
193 words
An endoscopic surgical instrument for use in snare cauterization operations, comprising: a tubular sheath member; loop means made at least in part of an electrically conductive material for forming an alternately expandable and contractible cauterization loop; an electrically conductive wire operatively connected to said loop means and extending longitudinally through said sheath member, said wire being slidable longitudinally through said sheath; electrical connector means at a proximal end of said wire for coupling said wire to a source of electrical energy; a flexible web member connected to said loop means essentially around a circumference thereof to form a capture pocket, said loop means defining a mouth opening of said pocket, said web member being attached to said loop means in a manner so as to expose said loop means to enable effective cauterization of organic tissues by said loop means, said web member being removably attached to said loop means along a major portion thereof; and means on said sheath member at a distal end thereof for at least substantially separating said web member from said loop means upon a proximally directed stroke of said wire at the termination of a cauterization operation.
Claim 3
Dependent Claim
26 words
The instrument defined in claim 1, further comprising a purse string attached to said web member along a ring shaped locus proximately to said mouth opening.
Claim 4
Dependent Claim
19 words
The instrument defined in claim 2 wherein said purse string is attached at a proximal end to said wire.
Claim 5
Dependent Claim
18 words
The instrument defined in claim 1 wherein said web member is attached by adhesive to said loop means.
Claim 6
Dependent Claim
22 words
The instrument defined in claim 1 wherein said web member is attached at a plurality of discrete points to said loop means.
Claim 7
Dependent Claim
31 words
The instrument defined in claim 1 wherein said loop means has a radially outwardly facing surface area, said web member being removably attached to said loop means along said surface area.
Claim 8
Dependent Claim
13 words
The instrument defined in claim 1 wherein said web member is a net.
Claim 9
Dependent Claim
17 words
The instrument defined in claim 1 wherein said web member is a continuous film of polymeric material.
Claim 10
Dependent Claim
24 words
The instrument defined in claim 1, further comprising means for permanently connecting said web to said loop means only at a distal tip thereof.
Claim 11
Independent Claim
244 words
A method for removing a selected portion of internal body tissues of a patient, comprising the steps of: providing a conductive cauterization loop to which a flexible web member is removably connected to define an expandable pocket, said loop defining a mouth opening of said pocket, said web member being attached to said loop in a manner so as to expose said loop to enable effective cauterization of organic tissues by said loop; ejecting said loop from a distal end of a tubular sheath member; upon said step of ejecting, expanding said loop and said web member from a collapsed configuration to an at least partially opened configuration; passing the expanded loop over the selected internal body tissues to be removed, so that said web member substantially surrounds said selected internal body tissues; drawing said loop back into said distal end of said tubular sheath member, thereby closing said loop around a base region of said selected internal body tissues, while said web member is maintained surrounding said selected internal body tissues; during said step of drawing, conducting an electrical current through said loop to sever said selected internal body tissues at said base region; during said step of drawing, detaching said web member from said loop so that said web member remains outside said sheath member; and also during said step of drawing, closing said mouth opening of said web member to thereby capture the severed internal body tissues in said web member.
Claim 12
Independent Claim
244 words
A method for removing a selected portion of internal body tissues of a patient, comprising the steps of: providing a conductive cauterization loop to which a flexible web member is removably connected to define an expandable pocket, said loop defining a mouth opening of said pocket, said web member being attached to said loop in a manner so as to expose said loop to enable effective cauterization of organic tissues by said loop; ejecting said loop from a distal end of a tubular sheath member; upon said step of ejecting, expanding said loop and said web member from a collapsed configuration to an at least partially opened configuration; passing the expanded loop over the selected internal body tissues to be removed, so that said web member substantially surrounds said selected internal body tissues; drawing said loop back into said distal end of said tubular sheath member, thereby closing said loop around a base region of said selected internal body tissues, while said web member is maintained surrounding said selected internal body tissues; during said step of drawing, conducting an electrical current through said loop to sever said selected internal body tissues at said base region; during said step of drawing, detaching said web member from said loop so that said web member remains outside said sheath member; and also during said step of drawing, closing said mouth opening of said web member to thereby capture the severed internal body tissues in said web member.
Claim 13
Dependent Claim
31 words
The method defined in claim 10 wherein said step of detaching includes the step of peeling said web member away from said loop at a distal edge of said sheath member.
Claim 14
Dependent Claim
31 words
The method defined in claim 10 wherein said step of expanding comprising the step of pushing said loop, together with said web member, from a distal end of said sheath member.
Claim 15
Dependent Claim
36 words
The instrument defined in claim 10 wherein said loop is pulled completely into said sheath member during said step of drawing, said web member and the captured internal body tissues remaining outside of said sheath member.
Claim 16
Dependent Claim
184 words
An endoscopic surgical instrument for use in snare cauterization operations, comprising: a tubular sheath member; loop means made at least in part of an electrically conductive material for forming an alternately expandable and contractible cauterization loop; an electrically conductive wire operatively connected to said loop means and extending longitudinally through said sheath member, said wire being slidable longitudinally through said sheath; a flexible well member connected to said loop means essentially around a circumference thereof to form a capture pocket, said web member being attached by adhesive to said loop means, said loop means defining a mouth opening of said pocket, said web member being attached to said loop means in a manner so as to expose said loop means to enable effective cauterization of organic tissues by said loop means, said web member being removably attached to said loop means along a major portion thereof; and means on said sheath member at a distal end thereof for at least substantially separating said web member from said loop means upon a proximally directed stroke of said wire at the termination of a cauterization operation.
Claim 17
Dependent Claim
184 words
An endoscopic surgical instrument for use in snare cauterization operations, comprising: a tubular sheath member; loop means made at least in part of an electrically conductive material for forming an alternately expandable and contractible cauterization loop; an electrically conductive wire operatively connected to said loop means and extending longitudinally through said sheath member, said wire being slidable longitudinally through said sheath; a flexible well member connected to said loop means essentially around a circumference thereof to form a capture pocket, said web member being attached by adhesive to said loop means, said loop means defining a mouth opening of said pocket, said web member being attached to said loop means in a manner so as to expose said loop means to enable effective cauterization of organic tissues by said loop means, said web member being removably attached to said loop means along a major portion thereof; and means on said sheath member at a distal end thereof for at least substantially separating said web member from said loop means upon a proximally directed stroke of said wire at the termination of a cauterization operation.
Claim 18
Dependent Claim
190 words
An endoscopic surgical instrument for use in snare cauterization operations, comprising: a tubular sheath member; loop means made at least in part of an electrically conductive material for forming an alternately expandable and contractible cauterization loop; an electrically conductive wire operatively connected to said loop means and extending longitudinally through said sheath member, said wire being slidable longitudinally through said sheath member; a flexible wed member connected to said loop means essentially around a circumference thereof to form a capture pocket, said loop means defining a mouth opening of said pocket, said web member being attached to said loop means in a manner so as to expose said loop means to enable effective cauterization of organic tissues by said loop means, said web member being removably attached to said loop means along a major portion thereof; means for permanently connecting said web to said loop means only at a distal tip thereof; and means on said sheath member at a distal end thereof for at least substantially separating said web member from said loop means upon a proximally directed stroke of said wire at the termination of a cauterization operation.
Claim 19
Dependent Claim
190 words
An endoscopic surgical instrument for use in snare cauterization operations, comprising: a tubular sheath member; loop means made at least in part of an electrically conductive material for forming an alternately expandable and contractible cauterization loop; an electrically conductive wire operatively connected to said loop means and extending longitudinally through said sheath member, said wire being slidable longitudinally through said sheath member; a flexible wed member connected to said loop means essentially around a circumference thereof to form a capture pocket, said loop means defining a mouth opening of said pocket, said web member being attached to said loop means in a manner so as to expose said loop means to enable effective cauterization of organic tissues by said loop means, said web member being removably attached to said loop means along a major portion thereof; means for permanently connecting said web to said loop means only at a distal tip thereof; and means on said sheath member at a distal end thereof for at least substantially separating said web member from said loop means upon a proximally directed stroke of said wire at the termination of a cauterization operation.
References Cited (Backward Citations)
DE46856C
Cited
US460940A
Cited
US1609014A
Cited
US3472230A
Cited
US3715829A
Cited
US4202338A
Cited
US4326530A
Cited
US4345599A
Cited
US4503855A
Cited
US4493320A
Cited
US4643187A
Cited
US4557255A
Cited
US4516347A
Cited
US4638802A
Cited
US4718419A
Cited
US4997435A
Cited
US5084054A
Cited
US5037379A
Cited
US5354303A
Cited
US5143082A
Cited
US5122147A
Cited
US5147371A
Cited
US5312416A
Cited
US5190542A
Cited
US5201740A
Cited
US5158561A
Cited
US5279539A
Cited
US5341815A
Cited
US5368597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |