US 12,239,352 B2
Removable split cannula for placement of electrodes
Max Holland Billard, Jacksonville, FL (US); and Perry Twyford, Jacksonville, FL (US)
Assigned to Zimmer Biomet CMF and Thoracic, LLC, Jacksonville, FL (US)
Filed by Zimmer Biomet CMF and Thoracic, LLC, Jacksonville, FL (US)
Filed on Feb. 9, 2022, as Appl. No. 17/668,091.
Claims priority of provisional application 63/147,367, filed on Feb. 9, 2021.
Prior Publication US 2022/0265335 A1, Aug. 25, 2022
Int. Cl. A61B 17/90 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/90 (2021.08) [A61B 17/00234 (2013.01); A61B 2017/00292 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of inserting an electrode into a cranial cavity of a cranium,
the method comprising:
determining a length, between a target within the cranial cavity and a proximal end of a multipiece cannula, of the electrode for insertion of the electrode to the target;
inserting a distal end of the electrode through the cannula supported by an instrument holder of a surgical arm;
positioning the surgical arm such that a distance from the target to the proximal end of the cannula is equal to the length;
feeding the electrode through the cannula and through an anchor bolt into the cranial cavity;
stopping feeding of the electrode through the cannula and into the cranial cavity when the length of the electrode fed into the cavity reaches the length between the proximal end of the multipiece cannula and the target;
removing a separable portion of the cannula from the instrument holder; and
passing a proximal end of the electrode through the cannula and the instrument holder, where the proximal end of the electrode includes a connector that is larger than a guide bore of the cannula.