METHOD FOR SURGICAL TREATMENT OF HIGH-PARASITIC SPONDYLOLISTHESIS AND DEVICE FOR INSERTION OF OSTEOINDUCTIVE MATERIAL Russian patent published in 2020 - IPC A61B17/56 A61F2/46 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine, namely to traumatology and orthopedics. Method for surgical treatment of high-resolution spondylolisthesis involves posterior internal fixation of the fifth lumbar vertebra (L₅) by transpedicular introduction of screws into displaced vertebra L₅ and the transdisk drive of the screws through the body of the sacral vertebra (S₁), through disk L₅-S₁ in cranioventral part of displaced vertebral body L_5; paired fixation of transpedicular and transdisk screws by bars, transacral interbody spinal fusion L₅-S₁. Transacral interbody spondylosyndesis L₅-S₁ is performed as follows: section of plate of vertebra arch S₁ is resected, on the left dural sack at level S₁-S₂ displaced medially, posterior body wall S₁ is perforated vertebra in the interval between S₁ spine and dural sac, an EOC-controlled channel is formed through a vertebral body S₁ and disk L₅-S₁ into vertebral body L_5. Canal is made so that it blindly terminates in the bones of the body L₅ vertebra. Cannulated tap is used to widen the canal. Hollow tube of the osteoinductive introduction device is screwed into the formed channel, not reaching the channel bottom. Outer thread of hollow tube corresponds to that of cannulated tap. Osteoinductive material is introduced into funnel of hollow tube. Pusher of the osteoinductive introduction device is inserted through the funnel into the tube cavity. Osteoinductive material is pushed into the cavity formed by the bottom and walls of the canal and lower end of the hollow tube, and stamped. When the pusher cone-shaped section stops to reach the funnel walls, the hollow tube is unscrewed. Osteoinductive material is introduced into the tube cavity. Osteoinductive material is pushed into the cavity formed by the channel bottom and the lower end of the hollow tube, and stamped. Channel is filled in the same way without reaching the outer edge. Canal is clogged with hard osteoinductive material and covered with wax. Osteoinductive introduction device is detachable and comprises a guide in the form of a hollow tube with a funnel in the upper part and a thread on the external surface of the hollow tube and a pusher and a handle in the guide. Thread is made along the entire external surface of the hollow tube. In addition, millimeter scale is made on outer surface of guide. Length of the pusher is equal to the length of the hollow tube of the guide. Handle is installed in the upper part of the pusher and is made in the form of a cylinder with a conic section of transition to the pusher rod. Outer surface of the cone-shaped section of the handle corresponds to the inner surface of the funnel of the guide.

EFFECT: creation of a method for stabilization of a movable vertebral segment in surgical treatment of spondylolisthesis and a device for introduction of osteoinductive material free from the above disadvantages; invention enables accurate positioning in a channel at a given depth and controlling the degree of channel filling, which simplifies the process of compacting the osteoplastic material along the entire length of the formed channel and in the disc cavity.

2 cl, 1 ex, 6 dwg