Medical snare loop with indentations for changing effective size of loop and associated method
First Claim
1. A medical cauterization snare instrument comprising:
- a tubular member;
an elongate member disposed at least partially inside said tubular member;
a resilient loop having a substantially planar fully expanded configuration of a first size attached to one end of said elongate member, said loop including a first bend on a side of said loop opposite said elongate member, said loop further including two loop sections each extending from said elongate member to said bend, at least one of said loop sections being formed with at least one notch or dent for enabling a use of said loop in at least one second size smaller than said first size upon a positioning of said loop by moving said elongate member and said tubular member relative to one another so that said notch or dent is disposed at a mouth opening of said tubular member, said two loop sections being disposed entirely outside of said tubular member in said fully expanded configuration of said loop, said one of said loop sections including, in the fully expanded configuration of said loop, a second bend or kink disposed between said first bend and said notch or dent, said second bend or kink defining a concavity facing towards the other of said loop sections, said loop being made of an electrically conductive material for cauterizing organic tissues of a patient, said notch or dent being so small relative to said loop that said loop in the fully expanded configuration takes the form of a single oval having a width that is substantially unaffected by said notch or dent so that said loop in the fully expanded configuration can be used to sever a polyp substantially larger than any polyp severable by said second size of said loop;
a connector electrically linked to said loop for operatively coupling said loop to a voltage source; and
wherein each of said notches or dents includes a pair of linear segments connected to one another by an arcuate bight, said segments being disposed at an angle of approximately 80°
to approximately 120°
relative to one another.
3 Assignments
0 Petitions
Accused Products
Abstract
A medical cauterization snare includes a tubular member such as a catheter, a rod or wire disposed at least partially inside the tubular member, and a resilient loop of a first size attached to a distal end of the rod or wire. The loop includes a nose on a side of the loop opposite the wire. The loop further includes two loop sections each extending between the wire and the nose. The loop sections are each formed with a respective notch or dent for enabling a use of the loop in a second size smaller than the first size. Positioning the loop relative to the tubular member so that the notches or dents are disposed at a mouth opening of the tubular member generates this secondary deployment configuration.
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Citations
31 Claims
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1. A medical cauterization snare instrument comprising:
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a tubular member; an elongate member disposed at least partially inside said tubular member; a resilient loop having a substantially planar fully expanded configuration of a first size attached to one end of said elongate member, said loop including a first bend on a side of said loop opposite said elongate member, said loop further including two loop sections each extending from said elongate member to said bend, at least one of said loop sections being formed with at least one notch or dent for enabling a use of said loop in at least one second size smaller than said first size upon a positioning of said loop by moving said elongate member and said tubular member relative to one another so that said notch or dent is disposed at a mouth opening of said tubular member, said two loop sections being disposed entirely outside of said tubular member in said fully expanded configuration of said loop, said one of said loop sections including, in the fully expanded configuration of said loop, a second bend or kink disposed between said first bend and said notch or dent, said second bend or kink defining a concavity facing towards the other of said loop sections, said loop being made of an electrically conductive material for cauterizing organic tissues of a patient, said notch or dent being so small relative to said loop that said loop in the fully expanded configuration takes the form of a single oval having a width that is substantially unaffected by said notch or dent so that said loop in the fully expanded configuration can be used to sever a polyp substantially larger than any polyp severable by said second size of said loop; a connector electrically linked to said loop for operatively coupling said loop to a voltage source; and wherein each of said notches or dents includes a pair of linear segments connected to one another by an arcuate bight, said segments being disposed at an angle of approximately 80°
to approximately 120°
relative to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A medical cauterization snare instrument comprising:
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a tubular member; an elongate member disposed at least partially inside said tubular member; a resilient loop of a first size attached to one end of said elongate member, said loop including a first bend on a side of said loop opposite said elongate member, said loop further including two loop sections each extending from said elongate member to said bend, at least one of said loop sections being formed with at least one notch or dent for enabling a use of said loop in at least one second size smaller than said first size upon a positioning of said loop by moving said elongate member and said tubular member relative to one another so that said notch or dent is disposed at a mouth opening of said tubular member, the notch or dent in said one of said loop sections extending toward the other loop section, said loop having a fully opened relaxed configuration wherein both said loop sections are disposed outside of said tubular member, said one of said loop sections including, in said fully expanded configuration of said loop, a second bend or kink disposed between said first bend and said notch or dent, said second bend or kink defining a concavity facing towards the other of said loop sections, said notch or dent being so small relative to said loop that said loop in the fully opened relaxed configuration takes the form of a single oval having a width that is substantially unaffected by said notch or dent so that said loop in the fully opened relaxed configuration can be used to sever a polyp substantially larger than any polyp severable by said second size of said loop, said loop being made of an electrically conductive material for cauterizing organic tissues of a patient; a connector electrically linked to said loop for operatively coupling said loop to a voltage source; and wherein each of said notches or dents includes a pair of linear segments connected to one another by an arcuate bight, said segments being disposed at an angle of approximately 80°
to approximately 120°
relative to one another. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A medical cauterization snare instrument comprising:
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a tubular member; an elongate member disposed at least partially inside said tubular member; a resilient loop of a first size attached to one end of said elongate member, said loop including a first bend on a side of said loop opposite said elongate member, said loop further including two loop sections each extending from said elongate member to said bend, at least one of said loop sections being formed with at least one indentation or dimple for enabling a use of said loop in at least one second size smaller than said first size upon a positioning of said loop by moving said elongate member and said tubular member relative to one another so that said indentation or dimple is disposed at a mouth opening of said tubular member, said two loop sections being disposed entirely outside of said tubular member in said fully expanded configuration of said loop, said one of said loop sections including, in the fully expanded configuration of said loop, a second bend or kink disposed between said first bend and said indentation or dimple, said second bend or kink defining a concavity facing towards the other of said loop sections, said indentation or dimple being so small relative to said loop that said loop in the fully opened relaxed configuration takes the form of a single oval having a width that is substantially unaffected by said indentation or dimple so that said loop in the fully opened relaxed configuration can be used to sever a polyp substantially larger than any polyp severable by said second size of said loop, said loop being made of an electrically conductive material for cauterizing organic tissues of a patient; a connector electrically linked to said loop for operatively coupling said loop to a voltage source; and wherein each of said notches or dents includes a pair of linear segments connected to one another by an arcuate bight, said segments being disposed at an angle of approximately 80°
to approximately 120°
relative to one another. - View Dependent Claims (27, 28, 29)
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30. A medical cauterization method comprising:
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(a) providing a cauterization snare instrument including; a tubular member; an elongate member disposed at least partially inside said tubular member; a resilient loop having a substantially planar fully expanded configuration of a first size attached to one end of said elongate member, said loop including a first bend on a side of said loop opposite said elongate member, said loop further including two loop sections each extending from said elongate member to said bend, at least one of said loop sections being formed with at least one notch or dent for enabling a use of said loop in at least one second size smaller than said first size upon a positioning of said loop by moving said elongate member and said tubular member relative to one another so that said notch or dent is disposed at a mouth opening of said tubular member, said two loop sections being disposed entirely outside of said tubular member in said fully expanded configuration of said loop, said one of said loop sections including, in the fully expanded configuration of said loop, a second bend or kink disposed between said first bend and said notch or dent, said second bend or kink defining a concavity facing towards the other of said loop sections, said loop being made of an electrically conductive material for cauterizing organic tissues of a patient, said notch or dent being so small relative to said loop that said loop in the fully expanded configuration takes the form of a single oval having a width that is substantially unaffected by said notch or dent so that said loop in the fully expanded configuration can be used to sever a polyp substantially larger than any polyp severable by said second size of said loop; and a connector electrically linked to said loop for operatively coupling said loop to a voltage source; and wherein each of said notches or dents includes a pair of linear segments connected to one another by an arcuate bight, said segments being disposed at an angle of approximately 80°
to approximately 120°
relative to one another;(b) inserting a distal end portion of said tubular member into a patient, said loop being disposed inside said tubular member during the inserting of said distal end portion; (c) thereafter ejecting said loop from said tubular member inside the patient;
(d) expanding said loop to said fully expanded configuration;(e) placing the fully expanded loop over a first polyp; (f) thereafter withdrawing said loop in a proximal direction and thereby closing said loop about said polyp; (g) during the closing of said loop, conducting current through said loop to sever the polyp about a base region thereof, and alternatively to steps (d)-(g); (h) expanding said loop to said second size; (i) placing the loop expanded to said second size over a second polyp, said first polyp being larger than said second polyp; (j) thereafter withdrawing said loop in a proximal direction and thereby closing said loop about said second polyp; and (k) during the closing of said loop about said second polyp, conducting current through said loop to sever the second polyp about a base region thereof. - View Dependent Claims (31)
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Specification