US 12,262,926 B2
Power modules and methods for bone anchor and stylet insertion
Megan Jeffords, San Diego, CA (US); Ryan Woods, San Diego, CA (US); Naomi Kibrya, San Diego, CA (US); and Matthew Tobias Jacobs, San Diego, CA (US)
Assigned to Nuvasive, Inc., San Diego, CA (US)
Filed by NuVasive, Inc., San Diego, CA (US)
Filed on Nov. 11, 2021, as Appl. No. 17/454,542.
Claims priority of provisional application 63/173,944, filed on Apr. 12, 2021.
Claims priority of provisional application 63/112,816, filed on Nov. 12, 2020.
Prior Publication US 2022/0142681 A1, May 12, 2022
Int. Cl. A61B 17/70 (2006.01)
CPC A61B 17/7082 (2013.01) [A61B 17/7091 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A power module configured for adjustably controlling insertion of a bone anchor and a stylet under power from a motor, the power module comprising:
a driveshaft operatively coupled to the motor and configured to rotate at a first speed equal to a speed of rotation of the motor,
a gear system couplable at a proximal end thereof to the driveshaft, and at a distal end thereof to a medical instrument, wherein:
in a first mode of operation, the gear system is configured to be disengaged from the driveshaft, and
in a second mode of operation, the gear system is configured to engage with the driveshaft, and to reduce the first speed of rotation of the driveshaft to a second speed of rotation that is lower than the first speed, wherein the medical instrument is configured to rotate at the second speed of rotation;
a cover disposed over at least a portion of the power module, wherein the telescopic driveshaft is rotatable relative to the cover, and wherein the first driveshaft member and the third driveshaft member are translationally fixed relative to the cover,
wherein the drive shaft comprises a cannula disposed within the driveshaft, the cannula being configured to engage the stylet within the cannula in the first mode of operation, thereby causing the stylet to rotate at the first speed of rotation,
wherein each of the gear system and the medical instrument include an axially extending cannula through which at least a portion of the stylet extends,
wherein the driveshaft comprises a telescopic driveshaft, and the telescopic driveshaft includes a first driveshaft member, a second driveshaft member, and a third driveshaft member, and
wherein the gear system comprises a sun gear coupled to a distal end of the driveshaft, wherein the sun gear rotates at the first speed of rotation.