Surgical guide instrument devices and methods
View Patent ↗Systems, devices and methods are described for surgical guide instruments. For example, this disclosure describes surgical guide instruments for assisting in countersinking shelves for deep brain stimulation lead locking mechanisms.
1. A surgical guide instrument, the surgical guide instrument comprising:
a first end having a circular ring that extends around a center aperture and one or more protrusions extending from an outer surface of the circular ring;
a second end having an ovular ring that extends around an ovular aperture, the ovular ring having a bar that extends across the ovular aperture, the bar having a disc centered in the ovular aperture; and
an arm that extends between the first end and the second end.
2. The surgical guide instrument of claim 1 , wherein the arm has one or more angled portions that set a height difference between the first end and the second end.
3. The surgical guide instrument of claim 1 , wherein the one or more protrusions comprises three protrusions positioned at 90-degree intervals from each other.
4. The surgical guide instrument of claim 1 , wherein the disc is configured to fit in a burr hole in a skull of a patient.
5. The surgical guide instrument of claim 4 , wherein the burr hole is drilled through the first end.
6. The surgical guide instrument of claim 1 , wherein the ovular ring defines a drill area within the ovular aperture around the disc for drilling a countersunk shelf.
7. A method of countersinking deep brain stimulator lead anchoring devices, the method comprising:
providing a surgical guide instrument, the surgical guide instrument comprising:
a first end having a circular ring that extends around a center aperture and one or more protrusions extending from an outer surface of the circular ring;
a second end having an ovular ring that extends around an ovular aperture, the ovular ring having a bar that extends across the ovular aperture, the bar having a disc centered in the ovular aperture; and
an arm that extends between the first end and the second end;
aligning the one or more protrusions with centering marks in a treatment area;
drilling a burr hole through the circular ring;
seating the disc in the burr hole; and
drilling a countersunk shelf through the ovular aperture.
8. The method of claim 7 , further comprising:
seating a base ring of a deep brain stimulator lead on the countersunk shelf; and
securing the base ring to the countersunk shelf.