Control handle with device advancing mechanism
A catheter having an internal advancing mechanism that can advance stiffening wires or other devices, has a catheter with a catheter body, a tip section distal the catheter body, a device extending through at least the catheter body, and a control handle proximal the catheter body, where the control handle has an advancing mechanism with a threaded member, an adjustment member, and a guided member to which the device is connected, and the advancing mechanism is configured to advance and retract the device along the catheter body as controlled by a user. Each of the threaded member and the adjustment member has a generally cylindrical configuration. The threaded member has an outer surface configured with a helical guide channel. The adjustment member is configured to guide the guided member to move within the helical guide channel to advance and retract the device. The adjustment member can be rotatable over the threaded member by the user to control advancement and retraction of the device. The device may be a stiffener wire, a needle or any other device suitable for advancement and retraction in a catheter.
1. A catheter comprising:
a catheter body;
a device extending through the catheter body; and
a control handle proximal the catheter body, the control handle having an advancing mechanism comprising:
a threaded member,
an adjustment member surrounding the threaded member and comprising a longitudinal slot having proximal and distal ends, and
a guided member between the threaded member and the adjustment member, wherein the device is connected to the guided member, and wherein the longitudinal slot of the adjustment member is configured to guide the guided member to move in a space between the threaded member and the adjustment member to thereby advance and retract the device, the proximal end of the longitudinal slot being configured to limit proximal movement of the guided member within the space between the threaded member and the adjustment member, and the distal end of the longitudinal slot being configured to limit distal movement of the guided member within the space between the threaded member and the adjustment member.
2. A catheter of claim 1 , wherein each of the threaded member and the adjustment member has a generally cylindrical configuration, the threaded member has an outer surface configured with a helical guide channel, and the longitudinal slot of the adjustment member is configured to guide the guided member to move within the helical guide channel to advance and retract the device.
3. A catheter of claim 2 , wherein the adjustment member is rotatable over the threaded member to control advancement and retraction of the device.
4. A catheter of claim 1 , wherein the device is a stiffener wire.
5. A catheter of claim 1 , wherein the device is a needle.
6. A catheter of claim 1 , wherein the device delivers fluid.
7. A catheter of claim 1 , wherein the longitudinal slot of the adjustment member is in an inner surface of the adjustment member and is configured to guide movement of the guided member in a guide channel formed in an outer surface of the threaded member.
8. A catheter of claim 1 , wherein a distal end of the advancing mechanism is located at a proximal end of the control handle, and the adjustment member is mounted over the threaded member.
9. A catheter of claim 1 , wherein selected components extending through the control handle extend through a passage within the adjustment member and the advancing mechanism.
10. A catheter of claim 1 , wherein the control handle has a dedicated passage through which the device passes to connect with the guided member.
11. A catheter of claim 1 , wherein the device is wound about the threaded member and adapted to unwind and rewind as guided by the threaded member in response to rotation of the adjustment member relative to the threaded member.
12. A catheter of claim 1 , wherein the control handle has a thumb control in its distal region and the advancing mechanism in its proximal region.
13. A catheter comprising:
a catheter body;
a control handle comprising an advancing mechanism having a threaded member having a threaded outer circumference defining a channel, an adjustment member mounted onto the threaded member and comprising a longitudinal slot having proximal and distal ends, and a guided member situated between the threaded member and the adjustment member; and
a device connected to the guided member and extending distally therefrom through the control handle and the catheter body, wherein the longitudinal slot of the adjustment member is configured to guide the guided member to move within the channel to wind and unwind the device in the channel to thereby advance and retract the device, the proximal end of the longitudinal slot being configured to limit proximal movement of the guided member within the channel, and the distal end of the longitudinal slot being configured to limit distal movement of the guided member within the channel.
14. A catheter of claim 13 , wherein the adjustment member is configured for rotation relative to the threaded member in one direction to advance the device and in an opposite direction to retract the device.
15. A catheter of claim 13 , wherein the device is a stiffener wire.
16. A catheter of claim 13 , wherein the device is a needle.
17. A catheter of claim 13 , wherein the device delivers fluid.
18. A catheter of claim 13 , wherein each of the threaded member and the adjustment member has a generally cylindrical configuration.
19. A catheter comprising:
a catheter body having an outer wall, proximal and distal ends and at least one lumen extending therethrough;
a control handle comprising a threaded member, an adjustment member mounted on the threaded member and comprising a longitudinal slot having proximal and distal ends, and a guided member situated between the threaded member and the adjustment member; and
a device connected to the guided member and extending distally therefrom through the control handle and the catheter body, wherein the adjustment member is configured for rotation relative to the threaded member to move the guided member in a space between the threaded member and the longitudinal slot of the adjustment member to thereby advance and retract the device, the proximal end of the longitudinal slot being configured to limit proximal movement of the guided member within the space between the threaded member and the adjustment member, and the distal end of the longitudinal slot being configured to limit distal movement of the guided member within the space between the threaded member and the adjustment member.
20. A catheter of claim 19 , wherein a proximal portion of the device is wound about the threaded member and adapted to unwind and rewind following movement of the guided member in response to rotation of the adjustment member relative to the threaded member by a user.
21. A catheter of claim 19 , wherein the device is a stiffener wire.
22. A catheter of claim 19 , wherein the device is a needle.
23. A catheter of claim 19 , wherein the device is configured for tissue contact separately from the tip section.