Fixation mechanism for a coronary venous pacing lead
First Claim
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1. For use in conjunction with a cardiac lead having a lumen, an apparatus for fixing said cardiac lead in place within the vasculature of the heart comprising:
- (a) an internal coil having a predetermined shape and made of nickel titanium;
(b) a deployment tool for engaging and straightening the internal coil so that the coil can be inserted through a lumen of a lead into a desired position within the lead, retraction of the tool causing the internal coil to return to its predetermined shape.
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Accused Products
Abstract
An apparatus for fixing a cardiac lead in place within the vasculature of the heart includes a coil having a normal helical shape and a stylet for holding the coil straight during insertion of the coil through a lumen of the lead. Upon retraction of the stylet, the coil returns to its helical shape along with the lead, forcing portions of the lead into contact with the vessel wall.
120 Citations
28 Claims
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1. For use in conjunction with a cardiac lead having a lumen, an apparatus for fixing said cardiac lead in place within the vasculature of the heart comprising:
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(a) an internal coil having a predetermined shape and made of nickel titanium; (b) a deployment tool for engaging and straightening the internal coil so that the coil can be inserted through a lumen of a lead into a desired position within the lead, retraction of the tool causing the internal coil to return to its predetermined shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. For use in conjunction with a cardiac lead having a lumen, an apparatus for fixing said cardiac lead in place within the vasculature of the heart comprising:
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(a) an internal member having a predetermined shape; and (b) a stylet having variable stiffness for engaging and straightening the internal member so that the internal member can be inserted through a lumen of a lead into a desired position within the lead, retraction of the stylet causing the internal member to return to its predetrmined shape. - View Dependent Claims (24, 25, 26)
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27. For use in conjunction with a cardiac lead having a lumen, an apparatus for fixing said cardiac lead in place within the vasculature of the heart comprising:
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(a) an internal member having a predetermined shape; and (b) a hypo tube having a variety of stiffness for engaging and straightening the internal member so that the member can be inserted through a lumen of a lead into a desired position within the lead, retraction of the hypo tube causing the internal member to return to its predetermined shape.
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28. For use in conjunction with a cardiac lead having a lumen, an apparatus for fixing said cardiac lead in place within the vasculature of the heart comprising:
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(a) an internal member having a predetermined shape, said internal member comprising a coil of multifilar construction; and (b) a deployment tool for engaging and straightening the internal member so that the internal member can be inserted through a lumen of a lead into a desired position within the lead, retraction of the tool causing the internal member to return to its predetermined shape.
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Specification