摘要:
An electrophysiology catheter includes a tube having a proximal end, a distal end, and a lumen therebetween. The tube is preferably comprised of multiple sections of different flexibility, arranged so that the flexibility of the catheter increases from the proximal end to the distal end. There is a first generally hollow electrode member at the distal end. At least one magnetically responsive element is disposed at least partially in the hollow electrode, for orienting the distal end of the catheter with an externally applied magnetic field.
摘要:
A method of turning a medical device with the assistance of an externally applied magnetic field, in a direction with a component in a plane perpendicular to the direction of the externally applied magnetic field. The method includes applying a first torque to the distal end of the medical device by creating a magnetic moment at the distal end of the medical device, and applying a second torque to the distal end of the medical device. The second torque may be created by creating a second magnetic moment in the distal portion of the device spaced from the first, by using an electrostrictive device, by using a stylette inserted into the device, by using a fluid-driven shaped tube, or otherwise.
摘要:
A method of navigating a medical device includes determining the location of a medical device at a point in an operating region in a subject's body, the medical device being responsive to at least one control variable to assume a desired configuration includes storing information representative of the at least one control variable being applied to the medical device at the point, and more preferably storing information representative of the at least one control variable and the device length.
摘要:
A method for controlling a remote navigation system to navigate a medical device in an operating region in a subject is provided, comprising operating the remote navigation system to bring a sensor carried on a medical device successively into a plurality of locations in a predetermined pattern, and using the sensor to sense a physiological property of the subject in each location. At least once thereafter, the method operates the remote navigation system to bring a sensor carried on a medical device successively into a series of locations in a predetermined pattern relative to at least one location selected from the predetermined pattern in the immediate preceding step based upon the sensed physiological property value, and uses the sensor to sense the physiological property in each location.
摘要:
A method of turning a medical device (44), having a magnetically responsive element (46) associated with its distal end, at an operating point (42) within an operating region (40) inside a patient's body from an initial direction to a desired final direction, through the movement of at least one external source magnet (38). The at least one external source magnet (38) is moved in such a way as to change the direction of the distal end of the magnetic medical device (44) from the initial direction to the desired final direction without substantial deviation from the plane containing the initial direction and the desired final direction.
摘要:
A system for magnetically navigating a medical device in an operating region within the body of a patient. The system includes a magnet having a front field projecting from the front of the magnet sufficient to project a magnetic field into the operating region in the patient. The magnet is mounted for the movement between a navigation posistion in which the magnet is located adjacent to the patient with the front of the magnetic generally facing the operating region, and an imaging position in which the magnet is spaced from the patient and the front generally faces away from the operating region.
摘要:
The present invention provides a means for guiding a medical device within the body to approach a target destination. The system and method provide a means for determining a predicted length and orientation, navigating the device to an intermediate point less than the predicted length, determining an error between the projected destination and actual target destination, and successively updating a predicted value of a control variable to yield an orientation within a predetermined distance error before advancing the device the remaining distance to the destination. This provides a physician with the capability of verifying the device will be accurately guided to the target destination without trial and error. A method is also provided for intuitive navigation to targets with limited trial and error based on userapplied device orientation adjustments, where the user chooses the magnitude of the adjustments and the system determines the adjustment direction.
摘要:
An interface for remotely controlling a medical device in a patient's body provides a two dimensional display of a three dimensional rendering of the operating region, and allows the user to select the orientation or location of the distal end of the medical device on the display and then operate a navigation system to cause the distal end of the medical device to approximately assume the selected orientation or location.