METHOD FOR SPECIFYING SURGICAL CORRECTION OF SPINAL CANAL Russian patent published in 2016 - IPC A61B5/00 A61B6/00 

FIELD: medicine.

SUBSTANCE: method involves pre- and post-surgical spiral computed and magnetic resonance tomography of an involved spine. A height of superjacent spine H_a and subjacent spine H_b are measured. A cross-sectional dimension of the spinal canal of the superjacent spine is measured as a distance from a posterior surface of the vertebral body to an inner surface of the related vertebral arch in a median sagittal plane d_a. A cross-sectional dimension of the spinal canal of the superjacent spine is measured as a distance from a posterior surface of the vertebral body to an inner surface of the related vertebral arch in a median sagittal plane d_a. A cross-sectional dimension of the spinal canal within a maximum narrowing is measured as a pre- d and post-surgical d^* distance from the posterior surface of the vertebral body to the inner surface of the related vertebral arch in the median sagittal plane. A pre- h and post-surgical h^* distance from the posterior surface of the vertebral body to a stenosis factor point farthest from the posterior surface of the vertebral body in the median sagittal plane is measured. A pre- s and post-surgical s^* horizontal half-distance between extreme stenosis factor points on the inner surface of the vertebral arch is measured. A spinal canal surgical correction coefficient K_k, pre- V_d and post-surgical V_d ^* spinal canal volume deficiency coefficients, a pre- V_s and post-surgical V_s ^* volume of a stenosis factor portion penetrating into the spinal canal, non-dimensional variables x and y, x^* and y^* are calculated by formulas. If K_k is more than 0.4, the surgical correction of the spinal canal is considered satisfactory.

EFFECT: method enables the accurate quantitative assessment of the spinal canal stenosis at any level thereof and the accurate qualitative assessment of the surgical correction of the spinal canal by performing spiral computed and magnetic resonance tomography and measuring the most important dimensions that makes it possible to calculate the volume of the stenosis factor portion penetrated into the spinal canal.

4 dwg