ObjectiveTo explore the clinical efficacy of minimally invasive decompression and internal fixation under the Zista channel in the treatment of multi-segment lumbar spinal stenosis(LSS).

MethodsThe medical records of 64 patients with multi-segment LSS were collected.Thirty patients treated with traditional open decompression and internal fixation, and 34 patients treated with minimally invasive decompression and internal fixation under the Zista channel were divided into the open group and channel group, respectively.The surgical indicators, complications, preoperative and postoperative 3 months and two years pain visual simulation(VAS) score, Japanese Orthopaedic Association(JOA) score, postoperative Oswestry disability index(ODI), MacNab surgery satisfaction evaluation and intervertebral fusion were compared between two groups.

ResultsThe intraoperative blood loss and length of hospital stay in channel group were lower than those in open group(P < 0.01), and the differences of the operation time and complications between two groups were not statistically significant(P>0.05).After 3 months and 2 years of surgery, the VAS score and ODI were significantly lower than those before surgery, and the JOA score was higher than that before surgery in two groups(P < 0.05 to P < 0.01).However, the difference of each index during the follow-up period between two groups was not statistically significant(P>0.05).The differences of the surgical satisfaction and intervertebral fusion rate between two groups was not statistically significant(P>0.05).

ConclusionsThe minimally invasive decompression and internal fixation under the Zista channel in the treatment of LSS can improve the recent pain and limited function of LSS, and has less trauma and faster recovery compared with traditional open surgery.