THROMBUS REMOVAL SYSTEM AND PROCESS
First Claim
1. ) A mechanical retrieval device in a delivery catheter, the retrieval device for entraining and removing solid obstructions within blood vessels comprising:
- a) an extensible array of coils comprising an extensible array of coils having an axis common to at least some consecutive coils in the array;
b) a distal expandable and compressible fabric array; and
c) a proximal expandable and compressible fabric array;
wherein a), b) and c) are present within a single catheter.
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Accused Products
Abstract
A device capable of capturing and facilitating the removal of a solid obstruction in a vessel or tube, such as 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, with an extendable braid provided distally from the macrocoil to capture material distal of a deployed macrocoil.
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Citations
17 Claims
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1. ) A mechanical retrieval device in a delivery catheter, the retrieval device for entraining and removing solid obstructions within blood vessels comprising:
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a) an extensible array of coils comprising an extensible array of coils having an axis common to at least some consecutive coils in the array; b) a distal expandable and compressible fabric array; and c) a proximal expandable and compressible fabric array; wherein a), b) and c) are present within a single catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. ) A mechanical retrieval device having a width in an relaxed state of the mechanical retrieval device and a length and an axis extending along the length of the relaxed mechanical retrieval device, the mechanical retrieval device comprising:
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a) an extensible array of coils and a pull wire attached to a distal end of the extensible array of coils, wherein tension applied to the pull wire causes loops to form in sections of the extensible array of coils, the loops expanding the width of the mechanical retrieval device from that of the mechanical retrieval device in its relaxed state, b) a distal expandable and compressible fabric array; and c) a proximal expandable and compressible fabric array. - View Dependent Claims (11, 12)
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13. ) A deployed mechanical retrieval device distal from a delivery catheter, the deployed mechanical retrieval device configured to entrain and remove solid obstructions within blood vessels, the mechanical retrieval device comprising:
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a) an extensible array of coils comprising an extensible array of coils having an axis common to at least some consecutive coils in the array; b) a distal expanded and compressible fabric array; and c) a proximal expanded and compressible fabric array. - View Dependent Claims (14, 15, 16)
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17. The mechanical retrieval device in a delivery catheter of claim 17 wherein the proximal expanded and compressible fabric array comprises a fabric array having porosity when expanded that allows blood flow through the distal expandable and compressible fabric array.
Specification