Medical device control system
A control system for allowing a physician to control the orientation of a medical device or a medical instrument in a variety of directions with one hand. An actuator selectively tensions one or more control cables having ends secured at or adjacent a distal tip of the medical device in order to bend the distal tip in a desired direction. In one embodiment, a physician can adjust the movement of the distal tip in a desired direction without affecting the orientation of the medical device in other directions.
1. A control for selectively orienting a medical device of the type having control cables operably associated with a distal tip of the medical device, comprising:
a single actuator configured for independent longitudinal and rotational movement to direct movement of the distal tip of the medical device;
a body coupled to the single actuator and configured to permit longitudinal and rotational movement of the single actuator;
a first plate coupled to the single actuator that selectively tensions a first control cable when the single actuator is moved longitudinally; and
a second plate coupled to the single actuator that selectively tensions a second control cable and does not tension the first control cable when the single actuator is moved rotationally, wherein movement of the first control cable is independent of movement of the second control cable.
2. The control of claim 1 , wherein at least one of the control cables includes a bowden cable having an outer sheath.
3. The control of claim 1 , further comprising:
a rail mounted to a fixed surface with respect to a patient along which the body can be moved parallel to a longitudinal axis of the rail.
4. The control of claim 3 , further comprising a clamp configured to permit rotation of the body about the longitudinal axis of the rail.
5. The control of claim 1 , further comprising:
an additional actuator configured to control the movement of another set of control cables operably associated with a distal tip of an additional medical device.
6. The control of claim 2 , further comprising a stop plate configured to restrain the movement of the bowden cable.
7. The control of claim 1 , wherein the medical device includes an instrument for performing an examination or procedure on a patient.
8. The control of claim 1 , wherein the medical device is a catheter having one or more lumens through which an instrument can be passed.
9. A method of performing a minimally invasive procedure on a patient with one or more medical devices by:
delivering a medical device to an internal location within the patient; and
selectively controlling the medical device with a control that comprises:
a single actuator configured for independent longitudinal and rotational movement to direct movement of the distal tip of the medical device;
a body coupled to the single actuator and configured to permit longitudinal and rotational movement of the single actuator;
a first plate coupled to the single actuator that selectively tensions a first control cable when the single actuator is moved longitudinally; and
a second plate coupled to the single actuator that selectively tensions a second control cable and does not tension the first control cable when the single actuator is moved rotationally, wherein the movement of the first control cable is independent of movement of the second control cable.
10. The control of claim 1 , wherein the body is further configured to move in at least one direction to direct movement of the distal tip of the medical device.
11. The control of claim 10 , wherein the body is configured for at least one of a rotational movement and a longitudinal movement.
12. The control of claim 1 , wherein the body further includes a slot configured to permit movement of the single actuator in at least two directions.
13. The control of claim 3 , wherein the body includes a clamp configured to permit longitudinal movement of the body along the rail.
14. The control of claim 1 , wherein the body is pivotably coupled to the single actuator by a ball joint.