Method and apparatus for automated control and steering of multiple medical devices with a single interventional remote navigation system
Methods are provided for automatically actuating and positioning a first medical device in a subject anatomy with a remote medical navigation system together with a localized second medical device that passes through the first device and is also actuated by the remote navigation system to access a desired target location. After an initial calibration step, an exemplary method comprises: (a) determining configurational variables for the first medical device based on a computational model of device deformation and a set of geometrical constraints, and (b) automatically steering the first medical device with the remote navigation system to the computationally determined configuration.
1. A method for automatically actuating and positioning a deflectable sheath device in a subject anatomy with a remote medical navigation system together with a localized second medical device that passes through the deflectable sheath device and is also actuated by the remote medical navigation system to access a desired target location, the method comprising the steps of:
(a) calibrating an initial configuration of the deflectable sheath device by manual adjustment of controls of the remote medical navigation system such that sheath deflection is generated and is visually apparent in an X-ray image, and marking on a graphical user interface a length of the second medical device near the distal tip of the deflectable sheath device,
(b) selecting a desired target location in the subject anatomy to access with the second medical device,
(c) computationally determining a set of degrees of freedom for optimal device configuration of the deflectable sheath device based on a computational model of device deformation and a set of geometrical constraints,
(d) automatically steering the deflectable sheath device with the remote medical navigation system to the computationally determined set of degrees of freedom,
(e) using position and orientation information from at least one of the deflectable sheath device or the second medical device to make automatic feedback controlled adjustments to the configuration of the deflectable sheath device,
(f) repeatedly iterating the feedback-controlled adjustments to the device configuration of the deflectable sheath device until a pre-determined criterion is reached, and
(g) steering the second medical device with the remote medical navigation system to access the desired target location.
2. The method of claim 1 , where steps (b) through (g) are repeatedly applied as different anatomical target locations are selected.
3. The method of claim 1 , where the second medical device is a magnetic ablation catheter.
4. The method of claim 1 , where the step of steering the second medical device is based on generating changes to device actuation variables based on a computational model of the second medical device.
5. The method of claim 1 , where the method of actuation of the deflectable sheath device comprises the change of at least one mechanically driven variable.
6. The method of claim 1 , where the method of actuation of the second medical device comprises the change of a magnetic field variable.
7. The method of claim 1 , where the computational determination of the set of degrees of freedom includes the satisfaction of at least one geometrical constraint involving a distance measure to the desired target location.
8. The method of claim 1 , where the computational determination of a set of degrees of freedom for desired optimal desired device configuration comprises computing updates to at least one of (i) deflection, (ii) rotation, or (iii) length degrees of freedom.
9. The method of claim 1 , where the computational determination of the set of degrees of freedom includes the satisfaction of at least one geometrical constraint involving distal tip alignment with the desired target location.
10. The method of claim 1 , where the step of steering the second medical device is based on generating changes to device actuation variables based on a computational model of the second medical device.