[Early-middle stage effect of percutaneous spinal endoscopic BEIS technique for lumbar spinal stenosis]

To explore the clinical early-middle stage clinical effect of percutaneous spinal endoscopic with the technique of Broad Easy Immediate Surgery(BEIS) for lumbar spinal stenosis.

The clinical data of 57 patients with lumbar spinal stenosis treated by surgery from June 2015 to June 2016 were retrospectively analyzed, including 32 cases treated by percutaneous spinal endoscopic with the technique of BEIS (minimally invasive group) and 25 cases by posterior approach of lumbar pedicle screws internal fixation and intervertebral disc excision with bone graft fusion surgery (open surgery group). The pre-operative general data such as age, Body Mass Index (BMI) and etc. were analysed and compared. The operation time, intraoperative blood loss, hospitalization time of the two groups were analyzed. Visual analogue score(VAS), Oswestry Disability Index(ODI), Japanese Orthopedic Association Score(JOA) of preoperative and at 1 week, 1 month, 3 months, 6 months after surgery were used to evaluate the clinical outcome of the two group.

All the operations were successful and all the patients recovered smoothly without severe complications, all the wounds got good healing. The pain of the lumbar and lower limb had been improved after surgery. All the patients were followed up more than 6 months with an average of(10.65±3.38) months. There was no significant difference in general data such as age, BMI, and etc. between two groups(P>0.05). There were significant differences in VAS, ODI between two groups at 1 week, 1, 3, 6 months after surgery(P<0.05). The postoperative lumbar pain of the minimally invasive group had been better improved than the open surgery group. However, there was no significant difference in JOA between two groups at 1 week, 1, 3, 6 months after surgery(P>0.05). Intraoperative blood loss and hospitalization time of minimally invasive group was less than that of open surgery group.

BEIS technique has the advantage of less trauma, less bleeding for lumbar stenosis when compared to open surgery. It can better alleviate the postoperative local lumbar pain, and early-middle clinical effect is equivalent to open surgery, so it can be used as a safe and effective surgical treatment for lumbar spinal stenosis.