Hironobu Yamasaki

Evaluation of cervical cord function in cervical spondylotic myelopathy and/or radiculopathy using both segmental conductive spinal-evoked potentials (SEP)

To evaluate the function of the cervical cord and to diagnose the level and severity of cervical cord lesions in myelopathy, both segmental and conductive spinal evoked potentials (SEP) were measured in 73 patients with cervical spondylotic myelopathy and/or radiculopathy. In normal subjects, segmental SEPs consisted of two waves (R and N waves). Ascending conductive SEPs also consisted of two waves (first and second waves). The function of the cervical cord, including roots, grey matter, and white matter, can be measured by the combined method using both segmental and conductive SEPs, and this allows differentiation among radiculopathy and various types of myelopathy.

Short-Term Results of Total Knee Arthroplasty (Axiom)

A retrospective analysis of 40 total knee arthroplasties was performed on cases with a mean 2-year follow up. Axiom total knee prosthesis was used in all cases.At 2 years, the JOA score in OA cases (27 joints) improved from 47 points preoperatively to 79 points postoperatively. RA cases (13 joints) improved from 47 points to 77 points.The mean range of motion for the series went from 93° preoperatively to 107° postoperatively.Radiolucent lines, 2mm or greater in width, were not noted in radiographs.Short-term results were good.