EP0368568A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for removing an elongated structure implanted in biological tissue
Assignee: Cook Vascular Inc
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Filing: 1989-11-02
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Granted: —
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Expires: 2009-11-02
Abstract
Abstract Heart lead removal apparatus and method are disclosed for removing a heart lead from the wall of a heart through a blood vessel leading to the heart. The apparatus comprises a flexible stylet with an expandable member inserted within a coiled structure of the heart lead. When expanded the member grasps the distal end of the stylet and enables it to be extracted without rupture of the stylet.
Inventors
- 👤 Louis Goode
- 👤 Frederick John Shipko
- 👤 Neal Edward Fearnot
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 12:06
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/22; A61B17/221; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/057; A61N2001/0578; A61N2001/058
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
157 words
Apparatus for removing an elongated structure (204) from biological tissue, said apparatus comprising a stylet arrangement (200,205;2801) to be inserted into a longitudinal passageway (210) within the said structure via the proximal end (221) of the latter, the stylet arrangement comprising a first part (200;2802) capable of being inserted substantially along the length of said structure, and a second part (205;2804-2809) thereof being at least along a region of the said first part remote from the proximal end thereof, the said second part being operable to exert a sufficient lateral pressure on the said structure to enable the latter to be removed from the biological tissue by means including the said first part, characterized in that the said second part is outwardly expandable and capable of exerting a plurality of lateral forces on the said structure at locations at least remote from the proximal end of the said first part to provide the said sufficient lateral pressure.
Claim 2
Dependent Claim
157 words
Apparatus for removing an elongated structure (204) from biological tissue, said apparatus comprising a stylet arrangement (200,205;2801) to be inserted into a longitudinal passageway (210) within the said structure via the proximal end (221) of the latter, the stylet arrangement comprising a first part (200;2802) capable of being inserted substantially along the length of said structure, and a second part (205;2804-2809) thereof being at least along a region of the said first part remote from the proximal end thereof, the said second part being operable to exert a sufficient lateral pressure on the said structure to enable the latter to be removed from the biological tissue by means including the said first part, characterized in that the said second part is outwardly expandable and capable of exerting a plurality of lateral forces on the said structure at locations at least remote from the proximal end of the said first part to provide the said sufficient lateral pressure.
Claim 3
Dependent Claim
50 words
The apparatus according to claim 1, characterized in that said second part includes an expandable unit (205;1004;1102;1103;1204;1304;1405;1506;1605;1704;1806;2003;2804-2809) that at one end is attached to said first part and that is outwardly expandable in said longitudinal passageway for engaging said elongated structure to secure said first part to said elongated structure.
Claim 4
Dependent Claim
59 words
The apparatus according to claim 2 further characterized in that said expandable unit comprises a wire coil (205;2804u2809) having a distal end attached approximately at or near the said distal end of said first part and a proximal end having a catch wire (250;2306;2806-2808) extending therefrom for securing said proximal end (253;2806-2808) during the expansion of said wire coil.
Claim 5
Dependent Claim
41 words
The apparatus of claim 3 further characterized in that a proximal end (253) of said catch wire is arranged to extend outside of said longitudinal passageway for securing said proximal end of said wire coil when inserted in said longitudinal passageway.
Claim 6
Dependent Claim
30 words
The apparatus of claim 3 further characterized in that a proximal end (2807) of said catch wire is folded back thereon for engaging said catch wire with said elongated structure.
Claim 7
Dependent Claim
50 words
The apparatus according to claim 1 characterized in that said apparatus further comprises a control mechanism (254) positioned about a proximal end of said first part for expanding said second part and for removing said elongated structure from said tissue when said first part is secured to said elongated structure.
Claim 8
Dependent Claim
48 words
The apparatus according to claim 1 or any claim appendant thereto characterized in that said apparatus further comprises a tie (241) that is secured about a proximal end of said elongated structure after said first part is inserted in said longitudinal passageway and secured to said elongated structure.
Claim 9
Dependent Claim
48 words
The apparatus according to claim 1 or any claim appendant thereto characterized in that said apparatus further comprises a first tube (2402) positionable about a length of said elongated structure for separating said elongated structure from said tissue when said first part is secured to said elongated structure.
Claim 10
Dependent Claim
34 words
The apparatus according to claim 8 characterized in that said apparatus still further comprises a second tube (2405) positionable about and operable with said first tube for separating said tissue from said elongated structure.
Claim 11
Dependent Claim
49 words
The apparatus of claim 1 characterised in that said apparatus further comprises opposing jaws (223,224) that are arranged for grasping said elongated structure about a proximal end thereof and limiting movement thereof and pivotly interconnected elongated members (233,234) for operating said jaws between an open and a closed position.
Claim 12
Independent Claim
138 words
A method of removing an elongated structure from biological tissue in which biological adhesion(s) to the structure may have occurred, said method comprising inserting a stylet arrangement into and along a longitudinal passageway within the said structure via a proximal end of the latter, the insertion being sufficient to extend at least to a region remote from the said proximal end and causing a part of the stylet arrangement remote from the proximal end to exert a force on the said structure to enable the latter to be removed from the biological tissue by exerting a removal force on the stylet arrangement, characterized in that the said force is a multidirectional force applied on the said structure at least at locations distal to the biological adhesion(s) most remote from the said proximal end to facilitate the said removal.
Claim 13
Independent Claim
138 words
A method of removing an elongated structure from biological tissue in which biological adhesion(s) to the structure may have occurred, said method comprising inserting a stylet arrangement into and along a longitudinal passageway within the said structure via a proximal end of the latter, the insertion being sufficient to extend at least to a region remote from the said proximal end and causing a part of the stylet arrangement remote from the proximal end to exert a force on the said structure to enable the latter to be removed from the biological tissue by exerting a removal force on the stylet arrangement, characterized in that the said force is a multidirectional force applied on the said structure at least at locations distal to the biological adhesion(s) most remote from the said proximal end to facilitate the said removal.
Claim 14
Dependent Claim
56 words
The method according to claim 11 further characterized in that said method further includes separating a length of said elongated structure with a first tubular member positioned about and moved along said length of said elongated structure when said stylet arrangement exerts said force on the said structure on locations at least distal to said adhesion(s).
Claim 15
Dependent Claim
41 words
The method according to claim 12 characterized in that said separating includes positioning a second tubular member about said first tubular member and said elongated structure and alternatingly moving said first and second members along said length of said elongated structure.
Claim 16
Dependent Claim
56 words
The method according to claim 11 characterized in that said method further includes positioning a first tubular member about said elongated structure and extending the former to the distal end of said elongated structure and removing the distal end of said elongated structure from said biological tissue with said first tubular member and said stylet arrangement.
Claim 17
Dependent Claim
62 words
The method according to claim 14 characterized in that said method further includes positioning a second tubular member about the said first member and said elongated structure and extending the said second tubular member to the distal end of said elongated structure and removing the distal end of said elongated structure from said biological tissue in cooperation with said first tubular member.
References Cited (Backward Citations)
No citation records indexed.
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