Controlled depth injection device and method
First Claim
Patent Images
1. A catheter, comprising:
- a first elongate shaft having a proximal end, a distal end having a distal tip, and a lumen extending therethrough;
a second elongate shaft disposed within the lumen of the first elongate shaft;
the first elongate shaft including a first helical member comprising a plurality of turns; and
the second elongate shaft including a second helical member comprising a plurality of turns wherein the first helical member is longitudinally slidable within the lumen and the second elongate shaft is longitudinally slidable within the lumen when the first helical member is engaged with the second helical member.
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Abstract
A catheter adapted to deliver therapeutic or diagnostic agents to a target tissue of a human body is disclosed. A catheter in accordance with the present invention comprises a first elongate shaft having a proximal end, a distal end, and a lumen extending therethrough, a second elongate shaft disposed within the lumen of the first elongate shaft, the first elongate shaft including a first helical member comprising a plurality of turns, the second elongate shaft including a second helical member comprising a plurality of turns.
120 Citations
19 Claims
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1. A catheter, comprising:
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a first elongate shaft having a proximal end, a distal end having a distal tip, and a lumen extending therethrough;
a second elongate shaft disposed within the lumen of the first elongate shaft;
the first elongate shaft including a first helical member comprising a plurality of turns; and
the second elongate shaft including a second helical member comprising a plurality of turns wherein the first helical member is longitudinally slidable within the lumen and the second elongate shaft is longitudinally slidable within the lumen when the first helical member is engaged with the second helical member. - View Dependent Claims (2, 3, 4, 5, 6, 7)
a stop coupled to the second helical member, the stop positioned to limit the travel of a distal tip of the second helical member outside of a distal tip of the first helical member.
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8. A catheter, comprising:
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a first elongate shaft having a proximal end, a distal end having a distal tip, and a lumen extending therethrough;
a second elongate shaft disposed within the lumen of the first elongate shaft;
a first helical member comprising a plurality of turns; and
a second helical member comprising a plurality of turns defined by the second elongate shaft wherein the first helical member is longitudinally slidable within the lumen and the second helical member is longitudinally slidable within the lumen when the second helical member is engaged with the first helical member. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A catheter, comprising:
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a first elongate shaft having a proximal end, a distal end having a distal tip, and a lumen extending therethrough;
a second elongate shaft disposed within the lumen of the first elongate shaft;
a first helical member comprising a plurality of turns fixed to the first elongate shaft; and
a second helical member comprising a plurality of turns fixed to the second elongate shaft wherein the second elongate shaft is longitudinally slidable within the second helical member when the second helical member is engaged with the first helical member. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification