US Patent 10070900 Spondylolisthesis reduction system

An instrument for obtaining spinal rod measurements in situ includes a measurement member, a first indicating member, and a second indicating member. The measurement member measures a length between two spinal implants. The first indicating member couples with the measurement member and includes a first measurement scale coupled with a first shaft for engaging a first spinal implant of the two spinal implants. The second indicating member couples with the measurement member and includes a second measurement scale coupled with a second shaft for engaging a second spinal implant of the two spinal implants.