Surgical treatment device
First Claim
Patent Images
1. A biotissue excision instrument comprising:
- an elongated sheath having an outer peripheral wall defining an inner cavity therein, and a slit formed in the outer peripheral wall,a loop wire which is inserted in the inner cavity and extending in an elongated direction of the sheath, the loop wire having two elongated portions and a tip bent portion which connects the elongated portions to each other, the elongated portions having separated distal end portions;
an engaging member which detachably engages the tip bent portion of the loop wire to the sheath; and
a manipulating member which is connected to the distal end of one of the elongated portions, and advances said one of the elongated portions to outwardly project a section of said one of the elongated portion in a loop shape through the slit when said tip bent portion of the loop wire is engaged with the engaging member, so that the loop shape section of the wire outwardly extended from the slit encloses a biotissue.
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Accused Products
Abstract
A biotissue excising instrument includes a tubular sheath inserted into a body, manipulator inserted into the sheath through leading end of the manipulator and having a loop portion that can be unfolded and contracted to accommodate biotissue to be excised. A slit is formed leading end the sheath to project and sink loop portion of the treatment portion so that manipulator is advanced or retreated to laterally project or sink the loop portion out of or into the or contract the loop portion, the sheath, and a treatment portion provided at thus excising the biotissue loop portion.
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Citations
21 Claims
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1. A biotissue excision instrument comprising:
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an elongated sheath having an outer peripheral wall defining an inner cavity therein, and a slit formed in the outer peripheral wall, a loop wire which is inserted in the inner cavity and extending in an elongated direction of the sheath, the loop wire having two elongated portions and a tip bent portion which connects the elongated portions to each other, the elongated portions having separated distal end portions; an engaging member which detachably engages the tip bent portion of the loop wire to the sheath; and a manipulating member which is connected to the distal end of one of the elongated portions, and advances said one of the elongated portions to outwardly project a section of said one of the elongated portion in a loop shape through the slit when said tip bent portion of the loop wire is engaged with the engaging member, so that the loop shape section of the wire outwardly extended from the slit encloses a biotissue. - View Dependent Claims (2, 3, 18, 19)
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4. A biotissue excising instrument comprising:
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a loop member having a bent portion; a manipulation member for operating the loop member so that the loop member excises a biotissue; and a sheath having a distal end portion and a proximal end portion, the distal end portion having a cavity therein in which the loop member is received, the sheath having a slit formed in a side thereof, the slit being communicated with the cavity, the cavity of the sheath having an engaging portion which is detachably engaged with the bent portion by elastic deformation of the bent portion, the loop member being positioned in the cavity to be outwardly extendable through the slit in accordance with an operation of the manipulation member; wherein said loop member has a closed loop portion formed by at least one wire, the closed loop portion is outwardly extendable from the slit. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21)
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Specification