Coaxial needle and severing snare
First Claim
1. A device for treating a lesion within a living body, comprising:
- a sheath extending from a proximal end which, in an operative position, is located outside the body, to a distal end which, in the operative position is located within the body;
a fluid injection needle having a tissue piercing tip at a distal end thereof and a fluid injection port at a proximal end thereof, the fluid injection needle extending through the sheath and defining a central lumen which extends from the fluid injection port to the tissue piercing tip;
a snare extending within the central lumen to a loop formed in a distal end of the snare;
a needle actuator for moving the fluid injection needle between a retracted position in which the distal tip is received within the sheath to an injection position in which the distal tip extends distally beyond a distal end of the sheath; and
a snare actuator for moving the snare between a covered position in which the loop is received within the central lumen and an extended position in which the loop extends distally from the central lumen beyond the distal tip.
2 Assignments
0 Petitions
Accused Products
Abstract
A device for treating a lesion comprises a sheath extending from a proximal end which, in an operative position, is located outside the body, to a distal end which, in the operative position is located within the body. A needle extending through the sheath has a tissue piercing distal tip and a central lumen extending through the needle from a proximal port to a distal opening formed in the distal tip and a needle actuator is provided for moving the needle between a retracted position in which the distal tip is received within the sheath to an injection position in which the distal tip extends distally beyond a distal end of the sheath. A snare extends within the lumen to a loop formed in a distal end of the snare and a snare actuator is provided for moving the snare between a covered position in which the loop is received within the lumen and an extended position in which the loop extends distally from the lumen beyond the distal tip.
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Citations
8 Claims
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1. A device for treating a lesion within a living body, comprising:
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a sheath extending from a proximal end which, in an operative position, is located outside the body, to a distal end which, in the operative position is located within the body; a fluid injection needle having a tissue piercing tip at a distal end thereof and a fluid injection port at a proximal end thereof, the fluid injection needle extending through the sheath and defining a central lumen which extends from the fluid injection port to the tissue piercing tip; a snare extending within the central lumen to a loop formed in a distal end of the snare; a needle actuator for moving the fluid injection needle between a retracted position in which the distal tip is received within the sheath to an injection position in which the distal tip extends distally beyond a distal end of the sheath; and a snare actuator for moving the snare between a covered position in which the loop is received within the central lumen and an extended position in which the loop extends distally from the central lumen beyond the distal tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification