THROMBUS REMOVAL SYSTEM AND PROCESS
First Claim
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1. A medical device for removing a thrombus from a blood vessel, comprising:
- a catheter having a lumen;
within the lumen of the catheter is a macrocoil thrombus engaging component having a length with a proximal end and a distal end, the length of the macrocoil comprising microcoils that allow the length of the macrocoil 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 being capable of retracting within the lumen of the catheter to a maximum thickness that is less than one half of a diameter of the macrocoil when extended out of the lumen of the catheter by the first wire and the second wire,and the microcoil being expandable to a width of at least 0.002 mm when distended by relative movement between the first wire and second wire.
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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.
60 Citations
18 Claims
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1. A medical device for removing a thrombus from a blood vessel, comprising:
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a catheter having a lumen; within the lumen of the catheter is a macrocoil thrombus engaging component having a length with a proximal end and a distal end, the length of the macrocoil comprising microcoils that allow the length of the macrocoil 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 being capable of retracting within the lumen of the catheter to a maximum thickness that is less than one half of a diameter of the macrocoil when extended out of the lumen of the catheter by the first wire and the second wire, and the microcoil being expandable to a width of at least 0.002 mm when distended by relative movement between the first wire and second wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification