Thrombus removal system and process
First Claim
Patent Images
1. A method of capturing and retrieving a thrombus within vasculature of a living organism comprising:
- inserting into the vasculature a medical device comprising;
a macrocoil having a first set of loops therein in a thrombus engaging component having a length with a proximal end and a distal end, the length of the macrocoil comprising microcoils having a second set of loops therein that allow the length of the macrocoil and the microcoils to be extendable;
a first wire capable of providing force on the distal end of the macrocoil;
a second wire capable of providing force on the proximal end of the macrocoil;
the macrocoil loops retracting to a size fitting into a catheter having a diameter of about 1 mm or less when in the lumen, and the microcoil expanding to a width of at least twice the size of the macrocoil loops in the catheter when removed from the lumen and distended by relative movement between the first wire and second wire;
positioning at least a portion of the macrocoil past a thrombus;
adjusting the position of section of the macrocoil with respect to the thrombus by movement of at least one of the first wire and second wire to alter dimensions on both the first set of loops in the macrocoil and the dimensions of the second set of loops in the microcoils;
entraining the thrombus within coils of the macrocoil by movement of at least one of the first wire and second wire exerting force on the macrocoil and the microcoils to extend the macrocoil and the microcoils; and
removing the thrombus by withdrawing the medical device from the vasculature.
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Abstract
A device captures and assists in the removal of a thrombus in arteries, even in small arteries. The device uses a soft coil mesh to engage the surface of a thrombus, and a guidewire is used to retract the soft coil mesh with the captured thrombus. The soft coil 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 element forming the macrocoil and allows for control of gripping forces on the thrombus while reducing non-rigid contact of the device with arterial walls.
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Citations
20 Claims
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1. A method of capturing and retrieving a thrombus within vasculature of a living organism comprising:
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inserting into the vasculature a medical device comprising; a macrocoil having a first set of loops therein in a thrombus engaging component having a length with a proximal end and a distal end, the length of the macrocoil comprising microcoils having a second set of loops therein that allow the length of the macrocoil and the microcoils to be extendable; a first wire capable of providing force on the distal end of the macrocoil; a second wire capable of providing force on the proximal end of the macrocoil; the macrocoil loops retracting to a size fitting into a catheter having a diameter of about 1 mm or less when in the lumen, and the microcoil expanding to a width of at least twice the size of the macrocoil loops in the catheter when removed from the lumen and distended by relative movement between the first wire and second wire; positioning at least a portion of the macrocoil past a thrombus; adjusting the position of section of the macrocoil with respect to the thrombus by movement of at least one of the first wire and second wire to alter dimensions on both the first set of loops in the macrocoil and the dimensions of the second set of loops in the microcoils; entraining the thrombus within coils of the macrocoil by movement of at least one of the first wire and second wire exerting force on the macrocoil and the microcoils to extend the macrocoil and the microcoils; and removing the thrombus by withdrawing the medical device from the vasculature. - View Dependent Claims (3, 4, 6, 13, 15, 17)
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2. A method of capturing and retrieving a thrombus within vasculature of a living organism comprising:
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inserting into the vasculature a medical device comprising; a macrocoil in a thrombectomy catheter lumen, the macrocoil having a first set of loops therein in a thrombus engaging component having a length with a proximal end and a distal end, the length of the macrocoil comprising microcoils having a second set of loops therein that allow the length of both the macrocoil and the microcoils to be extendable; a first wire capable of providing force on the distal end of the macrocoil; a second wire capable of providing force on the proximal end of the macrocoil; the loops of the macrocoil retracting to a maximum thickness of less than that of a thrombectomy catheter lumen when within the thrombectomy catheter lumen, and the loops of the microcoil expanding to a width of at least twice that of the thrombectomy catheter lumen when distended by relative movement between the first wire and second wire and wherein the macrocoil and the microcoil comprise non-thrombogenic compositions; positioning at least a portion of the macrocoil past a thrombus; adjusting the position of section of the macrocoil with respect to the thrombus by movement of at least one of the first wire and second wire to alter dimensions on the loops of both the first set of loops in the macrocoil and the dimensions of the second set of loops in the microcoils so that the loops of the microcoil are at least twice the thickness of the thrombectomy catheter lumen; entraining the thrombus within coils of the macrocoil by movement of at least one of the first wire and second wire exerting force on the macrocoil and the microcoils; and removing the thrombus by withdrawing the medical device from the vasculature. - View Dependent Claims (5, 14, 18)
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7. A method for removing clots from a blood vessel, comprising the steps of:
- providing a clot pulling device comprising a medical device within a thrombectomy catheter lumen having a catheter lumen diameter of about 1 mm or less, the medical device comprising;
a macrocoil in a thrombectomy catheter lumen, the macrocoil being a single wire having a first set of loops therein in a thrombus engaging component having a length with a proximal end and a distal end, the length of the macrocoil comprising microcoils in the single wire having a second set of loops in the thrombus engaging component therein that allow the length of the macrocoil and the length of the microcoils to be extendable; a first wire capable of providing force on the distal end of the macrocoil; a second wire capable of providing force on the proximal end of the macrocoil; the macrocoil retracting to a maximum thickness of less than 1 mm when within the thrombectomy catheter lumen, and the microcoil expanding to a width of at least twice that of the thrombectomy catheter lumen when removed from the thrombectomy catheter lumen and distended by relative movement between the first wire and second wire;
having a pushing member coupled to the proximal end or distal end of the macrocoil proximally therefrom, providing the medical device within a catheter having a lumen extending therethrough;
advancing the catheter through a blood vessel to a location adjacent an area of interest;
advancing at least a portion of the macrocoil through the lumen of the catheter to a position distal of the area of interest;
expanding the macrocoil by altering dimensions on the first set of loops in the macrocoil; and
entrapping a clot within the basket by applying force on the macrocoil and microcoils and altering dimensions of the loops of both the macrocoil and the microcoils.- View Dependent Claims (8, 9, 10, 11, 12)
- providing a clot pulling device comprising a medical device within a thrombectomy catheter lumen having a catheter lumen diameter of about 1 mm or less, the medical device comprising;
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16. A method of capturing and retrieving a thrombus within vasculature of a living organism comprising:
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inserting into the vasculature a medical device comprising; a macrocoil in a thrombectomy catheter lumen, the macrocoil having a first set of loops therein in a thrombus engaging component having a length with a proximal end and a distal end, the length of the macrocoil consisting essentially of microcoils having a second set of loops therein that allow the length of both the macrocoil and the microcoils to be extendable; a first wire capable of providing force on the distal end of the macrocoil; a second wire capable of providing force on the proximal end of the macrocoil; the loops of the macrocoil retracting to a maximum thickness of less than that of a thrombectomy catheter lumen when within the thrombectomy catheter lumen, and the loops of the microcoil expanding to a width of at least twice that of the thrombectomy catheter lumen when distended by relative movement between the first wire and second wire and wherein the macrocoil and the microcoil comprise non-thrombogenic compositions; positioning at least a portion of the macrocoil past a thrombus; adjusting the position of section of the macrocoil with respect to the thrombus by movement of at least one of the first wire and second wire to alter dimensions on the loops of both the first set of loops in the macrocoil and the dimensions of the second set of loops in the microcoils so that the loops of the microcoil are at least twice the thickness of the thrombectomy catheter lumen; entraining the thrombus within coils of the macrocoil by movement of at least one of the first wire and second wire exerting force on the macrocoil and the microcoils; and removing the thrombus by withdrawing the medical device from the vasculature. - View Dependent Claims (19, 20)
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Specification