US20070088369A1
Expired / Lapsed
US
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Snare with loop made of heat shrinkable shape memory material and method of use thereof
Assignee: Boston Scientific Scimed Inc
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Filing: 2005-10-14
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Granted: —
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Expires: 2025-10-14
Abstract
Abstract A tissue snare comprises an elongated member having a distal end and a loop formed of a shape memory material, the loop including a tissue receiving interior opening and being connected to the distal end of the elongated member, properties of the shape memory material being selected so that, when a temperature of the loop exceeds a critical temperature thereof, the loop constricts from an expanded state to a constricted state. A method of treating tissue comprises placing a loop of a snare around a portion of tissue to be treated while the loop is in an expanded configuration, the loop being formed of a shape memory material having a critical temperature so that, when a temperature of the loop is above the critical temperature, the loop transitions from the expanded configuration to a constricted configuration in combination with transitioning, after the loop has been placed around the portion of tissue to be treated, the loop from the expanded configuration to the constricted configuration to tighten the loop around the portion of tissue to be treated.
Inventors
- 👤 William Shaw
- 👤 Kristian DiMatteo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:37
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/32056; A61B2017/00831; A61B2017/00867; A61B2017/00871
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
72 words
1 . A tissue snare comprising: an elongated member having a distal end; and a loop comprising a shape memory material, the loop including a tissue receiving interior opening and being connected to the distal end of the elongated member, properties of the shape memory material being selected so that, when a temperature of the loop exceeds a critical temperature thereof, the loop constricts from an expanded state to a constricted state.
Claim 2
Dependent Claim
72 words
1 . A tissue snare comprising: an elongated member having a distal end; and a loop comprising a shape memory material, the loop including a tissue receiving interior opening and being connected to the distal end of the elongated member, properties of the shape memory material being selected so that, when a temperature of the loop exceeds a critical temperature thereof, the loop constricts from an expanded state to a constricted state.
Claim 3
Dependent Claim
19 words
2 . The snare according to claim 1 , wherein the shape memory material is a shape memory polymer.
Claim 4
Dependent Claim
19 words
3 . The snare according to claim 1 , wherein the shape memory material is a shape memory metal.
Claim 5
Dependent Claim
35 words
4 . The snare according to claim 1 , further comprising a temperature control apparatus controlling a temperature of the loop to control transitions of the loop between the expanded state and the constricted state.
Claim 6
Dependent Claim
38 words
5 . The snare according to claim 4 , wherein the temperature control mechanism includes a fluid lumen extending to the distal end of the elongated member to provide one of cooling and heating fluid to the loop.
Claim 7
Dependent Claim
31 words
6 . The snare according to claim 5 , wherein the temperature control mechanism further comprises a fluid conduit extending along at least a portion of the length of the loop.
Claim 8
Dependent Claim
25 words
7 . The snare according to claim 6 , wherein the fluid conduit extends from a distal opening of the fluid lumen, within the loop.
Claim 9
Dependent Claim
39 words
8 . The snare according to claim 5 , further comprising a fluid dispensing opening located adjacent to the distal end of the elongated member for directing fluid from the fluid lumen, toward an exterior surface of the loop.
Claim 10
Dependent Claim
31 words
9 . The snare according to claim 4 , wherein the temperature control mechanism further comprises a heating element positioned along at least a portion of the length of the loop.
Claim 11
Dependent Claim
19 words
10 . The snare according to claim 3 , wherein the heating element is integrally formed with the loop.
Claim 12
Dependent Claim
22 words
11 . The snare according to claim 2 , wherein the heating element is bonded to an exterior surface of the loop.
Claim 13
Dependent Claim
40 words
12 . The snare according to claim 1 , wherein the shape memory material is selected so that the critical temperature is greater than an ambient temperature to which the distal end will be exposed when in an operative position.
Claim 14
Dependent Claim
67 words
13 . The snare according to claim 1 , wherein the loop includes a first section extending along a curve from a distal end of the elongated member to a first section distal end separated from the distal end of the elongated member and a second section extending along a substantially straight line between the distal end of the elongated member and the first section distal end.
Claim 15
Dependent Claim
105 words
14 . A method of treating tissue comprising: placing a loop of a snare around a portion of tissue to be treated while the loop is in an expanded configuration, the loop being formed of a shape memory material having a critical temperature so that, when a temperature of the loop is above the critical temperature, the loop transitions from the expanded configuration to a constricted configuration; and after the loop has been placed around the portion of tissue to be treated, transitioning the loop from the expanded configuration to the constricted configuration to tighten the loop around the portion of tissue to be treated.
Claim 16
Dependent Claim
105 words
14 . A method of treating tissue comprising: placing a loop of a snare around a portion of tissue to be treated while the loop is in an expanded configuration, the loop being formed of a shape memory material having a critical temperature so that, when a temperature of the loop is above the critical temperature, the loop transitions from the expanded configuration to a constricted configuration; and after the loop has been placed around the portion of tissue to be treated, transitioning the loop from the expanded configuration to the constricted configuration to tighten the loop around the portion of tissue to be treated.
Claim 17
Dependent Claim
37 words
15 . The method according to claim 14 , wherein the loop is transitioned from the expanded configuration to the constricted configuration by applying heat to the loop to raise the temperature thereof above the critical temperature.
Claim 18
Dependent Claim
52 words
16 . The method according to claim 14 , wherein the critical temperature is selected to be lower than an ambient temperature in an environment in which the loop is to be used and wherein the loop is transitioned from the expanded configuration to the constricted configuration by exposure to body heat.
Claim 19
Dependent Claim
36 words
17 . The method according to claim 16 , wherein the loop is maintained in the expanded configuration until a desired transition time by cooling the loop to maintain a temperature thereof below the critical temperature.
Claim 20
Dependent Claim
48 words
18 . The method according to claim 17 , wherein the loop is connected to a proximal control handle via an elongated member and wherein heat is applied to the loop by supplying a heated fluid to the loop via a fluid conduit extending along the elongated member.
Claim 21
Dependent Claim
28 words
19 . The method according to claim 18 , wherein the loop includes a fluid lumen extending therethrough, the fluid lumen receiving heated fluid from the fluid conduit.
Claim 22
Dependent Claim
19 words
20 . The method according to claim 15 , wherein the loop is heated by an electric heating element.
Claim 23
Dependent Claim
22 words
21 . The method according to claim 14 , wherein the constricted configuration is controlled to resect tissue received within the loop.
Claim 24
Dependent Claim
26 words
22 . The method according to claim 14 , wherein the constricted configuration is controlled to cut off blood supply to tissue received within the loop.
References Cited (Backward Citations)
US3476115A
Cited
US4018229A
Cited
US4425908A
Cited
US4493320A
Cited
US5201741A
Cited
US5352184A
Cited
US5330483A
Cited
US5716410A
Cited
US5746747A
Cited
US5611803A
Cited
US6240630B1
Cited
US6388043B1
Cited
US6015415A
Cited
US6786884B1
Cited
US20020165555A1
Cited
US20050043743A1
Cited
US20030236531A1
Cited
US20050049613A1
Cited
US7135018B2
Cited
US20060009785A1
Cited
US7151157B2
Cited
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