Snare injection device
First Claim
Patent Images
1. A snare injection device for performing an endoscopic procedure to remove targeted tissue, the device comprising:
- a) an elongated member having a first channel and a second channel separated by a plastic membrane;
b) a needle system for inserting a needle into said target tissue, said needle system comprising a needle, a hollow actuator tube, and a tube handle, wherein said tube is inserted through said first channel;
c) a snare system for transecting said targeted tissue, said snare system comprising a snare apparatus, an actuating cable, and a snare handle, wherein said cable is inserted through said second channel;
d) a base, wherein said tube and said cable are routed therethrough; and
e) a flexible needle housing positioned between said needle and said elongated member when said needle is in a relaxed position;
f) wherein said needle housing has a continuous inner surface and prevents said needle from penetrating said plastic membrane;
g) further wherein said needle housing is disposed within a distal end of said first channel such that a cross-sectional area of said first channel is non-collapsible and greater than a cross-sectional area of said second channel along an entire length of said needle housing, and a cross-sectional area of said first channel is collapsible along at least a length of said elongated member proximal said needle housing.
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Abstract
A snare injection device for performing endoscopic transection procedures is disclosed. The device includes a snare system and a needle system, each containing actuator components separately routed in one of two channels of an elongated dual lumen. Deployment of the snare and needle are independently operated by two separate handle controls. The device includes needle travel stop and anti-puncture features for safety and ease of use.
76 Citations
15 Claims
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1. A snare injection device for performing an endoscopic procedure to remove targeted tissue, the device comprising:
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a) an elongated member having a first channel and a second channel separated by a plastic membrane; b) a needle system for inserting a needle into said target tissue, said needle system comprising a needle, a hollow actuator tube, and a tube handle, wherein said tube is inserted through said first channel; c) a snare system for transecting said targeted tissue, said snare system comprising a snare apparatus, an actuating cable, and a snare handle, wherein said cable is inserted through said second channel; d) a base, wherein said tube and said cable are routed therethrough; and e) a flexible needle housing positioned between said needle and said elongated member when said needle is in a relaxed position; f) wherein said needle housing has a continuous inner surface and prevents said needle from penetrating said plastic membrane; g) further wherein said needle housing is disposed within a distal end of said first channel such that a cross-sectional area of said first channel is non-collapsible and greater than a cross-sectional area of said second channel along an entire length of said needle housing, and a cross-sectional area of said first channel is collapsible along at least a length of said elongated member proximal said needle housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A snare injection device for performing an endoscopic procedure to remove targeted tissue, the device comprising:
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a) an elongated member having a first channel and a second channel; b) a needle system for inserting a needle into said target tissue, said needle system comprising a needle, a hollow actuator tube, and a tube handle, wherein said tube is inserted through said first channel; c) a snare system for transecting said targeted tissue, said snare system comprising a snare apparatus, an actuating cable, and a snare handle, wherein said cable is inserted through said second channel; d) a base, wherein said tube and said cable are routed therethrough; e) a flexible needle housing positioned between said needle and said first channel of said elongated member when said needle is in a relaxed position; and f) a spring disposed in said base that limits movement of said needle in a direction of said needle housing; g) wherein said needle housing prevents said needle from penetrating said first channel; h) wherein said needle housing has a continuous inner surface and is disposed within a distal end of said first channel such that a cross-sectional area of said second channel is non-collapsible and less than a cross-sectional area of said first channel along a length of said needle housing and a cross-sectional area of said first channel is collapsible relative a cross-sectional area of said second channel along at least a length of said elongated member proximal said needle housing.
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13. A snare injection device for performing an endoscopic procedure to remove targeted tissue, the device comprising:
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a) an elongated member having a first channel and a second channel separated by a plastic membrane; b) a needle system for inserting a needle into said target tissue, said needle system comprising a needle, a hollow actuator tube, and a tube handle, wherein said tube is inserted though said first channel; c) a snare system for transecting said targeted tissue, said snare system comprising a snare apparatus, an actuating cable, and a snare handle, wherein said cable is inserted though said second channel; d) a base, wherein said tube and said cable are routed therethrough; and e) a flexible needle housing positioned between said needle and said elongated member when said needle is in a relaxed position; f) wherein said needle housing acts as a spacer to maintain a constant ratio between a cross-sectional area of said first channel and a cross-sectional area of said second channel along a length of said needle housing, such that a cross-sectional area of said first channel is non-collapsible and greater than a cross-sectional area of said second channel along an entire length of said needle housing, and a cross-sectional area of said first channel is collapsible along a length of said plastic membrane proximal said needle housing.
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14. A snare injection device for performing an endoscopic procedure to remove targeted tissue, the device comprising:
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an elongated member adapted for insertion into an endoscope instrument channel and having a first channel and a second channel separated by a plastic membrane; a needle system for inserting a needle into said target tissue, said needle system comprising a needle, a hollow actuator tube, and a tube handle, wherein said tube is inserted through said first channel; a snare system for transecting said targeted tissue, said snare system comprising a snare apparatus, an actuating cable, and a snare handle, wherein said cable is inserted though said second channel; a base, wherein said tube and said cable are routed therethrough; and a flexible needle housing positioned at a distal end of said first channel; wherein said needle housing has a continuous inner surface and prevents said needle from penetrating said plastic membrane; further wherein said needle housing is disposed within a distal end of said first channel such that a cross-sectional area of said first channel is non-collapsible and greater than a cross-sectional area of said second channel along an entire length of said needle housing, and a cross-sectional area of said first channel is collapsible along at least a length of said elongated member proximal said needle housing. - View Dependent Claims (15)
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Specification