Thrombus removal system and process
First Claim
1. A device for retrieval of objects from within vessels of patients comprising:
- a length of microcoil having approximately helical turns continuously or within adjacent sections of the length of microcoil and the helical turns have an average diameter, at least some of the continuous length or the segments in the length of microcoil having eyelets that extend beyond the average diameter, and a core wire passing through at least some adjacent eyelets from a distal end to a proximal end of the length of microcoil, the core wire being restrained near the distal end of the length of microcoil.
2 Assignments
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Accused Products
Abstract
A device capable of capturing and facilitating the removal of a thrombus in blood vessels (or stones in biliary or urinary ducts, or foreign bodies) uses a soft coil mesh with the aid of a pull wire or string to engage the surface of a thrombus, and remove the captured thrombus. The soft coil mesh is formed by an elongated microcoil element that forms the helical elements of a macrocoil element. The microcoil element provides a relatively elastic effect to the helical elements forming the macrocoil and allows for control of gripping forces on the thrombus while reducing non-rigid contact of the device with arterial walls. The use of multiple coil mesh elements, delivered through a single lumen or multiple lumens, preferably with separate control of at least one end of each coil, provides a firm grasp on a distal side of a thrombus, assisting in non-disruptive or minimally disrupted removal of the thrombus upon withdrawal of the device.
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Citations
20 Claims
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1. A device for retrieval of objects from within vessels of patients comprising:
- a length of microcoil having approximately helical turns continuously or within adjacent sections of the length of microcoil and the helical turns have an average diameter, at least some of the continuous length or the segments in the length of microcoil having eyelets that extend beyond the average diameter, and a core wire passing through at least some adjacent eyelets from a distal end to a proximal end of the length of microcoil, the core wire being restrained near the distal end of the length of microcoil.
- View Dependent Claims (2, 3, 4)
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5. A device for insertion into a vessel for the removal of at least one solid object from within the vessel, the device comprising:
- a catheter having a lumen;
within the lumen of the catheter is at least;
a macrocoil elongate element having an axis and a length, multiple eyelets on the macrocoil elongate element that extend away from the axis, and a core wire extending through at least two of the multiple eyelets;
wherein the core wire is attached at a distal point along the length of the macrocoil, wherein increasing tension on the core wire, which tension is in part guided by the core wire passing through multiple eyelets, causes the macrocoil to form loops, curves, bundles or a non-linear compressed shape. - View Dependent Claims (6, 7, 8, 9, 10, 11)
- a catheter having a lumen;
- 12. A medical device for removing a thrombus from a blood vessel, comprising at least one microcatheter lumen, the medical device comprising at least one elongated flexible element lumen comprising a) at least one macrocoil comprising a continuous segment of microcoils or b) at least two separate flexible element segments comprising microcoils therein, each segment of the at least one macrocoil being capable of conformation to at least one solid object after deployment from the microcatheter lumen, each segment of flexible elements having eyelets extending away from an axis of the flexible element and a core wire extending through the eyelets, wherein tension on the core wire causes at least some adjacent eyelets to contract, forming a loop in the flexible element, the flexible element, when deployed to a location outside of the microcatheter lumen, is capable of being withdrawn from the location by withdrawal of the microcatheter lumen.
- 16. A medical device for removing a thrombus from a blood vessel, comprising at least one microcatheter lumen, the at least one microcatheter lumen having at least one deployable flexible element comprising a macrocoil having sections of microcoils separated by offset microcoils that form eyelets, each section of microcoils being capable of conformation to at least one solid object after deployment from the microcatheter lumen, each eyelet extending away from an axis of the microcoils with a core wire extending through the eyelets, wherein tension on the core wire causes at least some adjacent eyelets to contract towards each other, forming a loop in the flexible element, the loop comprising microcoils, and each of the at least one deployable flexible elements, when deployed to a location outside of the microcatheter lumen, is capable of being withdrawn from the location by withdrawal of the lumen.
Specification