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Spinal Screw Insertion Devices and Methods

  • US 20180368893A1
  • Filed: 06/27/2017
  • Published: 12/27/2018
  • Est. Priority Date: 06/27/2017
  • Status: Active Grant
First Claim
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1. An instrument for driving a bone anchor assembly into bone, comprising:

  • a shaft assembly comprising a first handle and an elongate shaft with a distal tip configured to couple to a bone anchor assembly; and

    a stylet adjuster assembly comprising a second handle and a carrier assembly having a plurality of predefined fixed positioning features for allowing a stylet to be releasably coupled to the carrier assembly in at least one predefined fixed position to position a distal tip of the stylet at a desired position relative to the distal tip of the elongate shaft, the carrier assembly being configured to axially translate proximally and distally relative to the shaft assembly in response to rotation of the second handle relative to the elongate shaft, and the carrier assembly being configured to rotate with the shaft assembly in response to rotation of the first handle relative to the second handle.

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