Medical retrieval snare with coil wrapped loop
First Claim
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1. A medical retrieval device for capturing and removing a body from a site within a vessel comprising:
- (a) a first elongated member having a proximal end, a distal end, and a lumen extending therebetween, said first elongated member being capable of being advanced through the vessel to the site of the body; and
(b) a second elongated member having a proximal end and a distal end that is received through the lumen of the first elongated member with the distal end of the second elongated member extending distally of the distal end of the first elongated member and being looped back and affixed to the distal end of the first elongated member to form a loop whose size may be adjusted by longitudinal movement of the second elongated member relative to the first member;
said second elongated member having (i) a flexible proximal section between about 50-250 cm in length and having an outer diameter of between about 10-40 mils, (ii) a more flexible intermediate section having a length between about 20-60 cm and having a diameter of between about 4-20 mils, and (iii) a most flexible distal end section having a length between about 1-10 cm and having a diameter of between about 2-6 mils;
at least a portion of said distal end section being wrapped with coil.
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Abstract
A device for retrieving foreign bodies, such as a vasoocclusive coil or elements, from within vessels such as those of the cardiovascular system includes a tubular member and a flexible wire that extends axially through the tubular member with its distal end extending out the distal end of the tubular member and looped back and affixed to the distal end of the tubular member to form a loop whose size may be adjusted by axial movement of the wire relative to the tubular member and which may be used to ensnare the foreign bodies and remove them from the vessel.
367 Citations
12 Claims
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1. A medical retrieval device for capturing and removing a body from a site within a vessel comprising:
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(a) a first elongated member having a proximal end, a distal end, and a lumen extending therebetween, said first elongated member being capable of being advanced through the vessel to the site of the body; and (b) a second elongated member having a proximal end and a distal end that is received through the lumen of the first elongated member with the distal end of the second elongated member extending distally of the distal end of the first elongated member and being looped back and affixed to the distal end of the first elongated member to form a loop whose size may be adjusted by longitudinal movement of the second elongated member relative to the first member; said second elongated member having (i) a flexible proximal section between about 50-250 cm in length and having an outer diameter of between about 10-40 mils, (ii) a more flexible intermediate section having a length between about 20-60 cm and having a diameter of between about 4-20 mils, and (iii) a most flexible distal end section having a length between about 1-10 cm and having a diameter of between about 2-6 mils;
at least a portion of said distal end section being wrapped with coil. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A medical retrieval device for capturing and removing a body from a site within a vessel comprising:
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(a) a catheter body having a proximal end, a distal end, and a lumen extending therebetween, said catheter body being capable of being advanced through the vessel to the site of the body; and (b) an elongated member having a proximal end and a distal end that is received through the lumen of the catheter body with the distal end of the elongated member extending distally of the distal end of the catheter body and being looped back and directly affixed to the distal end of the catheter body to form a loop whose size may be adjusted by longitudinal movement of the elongated member relative to the catheter body; said elongated member having (i) a flexible proximal section between about 50-250 cm in length and having an outer diameter of between about 10-40 mils, (ii) a more flexible intermediate section having a length between about 20-60 cm and having a diameter of between about 4-20 mils, and (iii) a most flexible distal end section having a length between about 1-10 cm and having a diameter of between about 2-6 mils;
at least a portion of said distal end section being wrapped with coil. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification