Application and midterm follow-up of interspinous process spacer (X-Stop) in the treatment of degenerative disc diseases
WANG Bing
YU Xiu-chun
ZHOU Yin
LIANG Jin
ZHANG Jing-tao
HUANG Wei-min
Abstract：Objective To explore the midterm clinical results and surgical indications of interspinous process spacer ( X-Stop ) in the treatment of degenerative disc diseases ( DDD ). Methods From November 2009 to December 2011, a total of 47 patients with single-level DDD underwent interspinous process spacer ( X-Stop ) surgery, who were all followed up for more than 2 years. Their clinical data were retrospectively analyzed. There were 16 males and 31 females, whose mean age was ( 56.3±11.1 ) years. They were diagnosed as lumbar spinal stenosis, prolapse of lumbar intervertebral disc, lumbar spinal instability and so on. The Visual Analogue Scale ( VAS ) and Japanese Orthopedic Association ( JOA ) score ( 29 points ) were used to evaluate the improvement of clinical symptoms, and the scores were recorded preoperatively and in the latest follow-up. Results The mean operation time was 70 min, and the mean blood loss was 67.2 ml ( range:20-300 ml ). The postoperative follow-up time was 37.2 months on average ( range:25-50 months ). Three patients had residual low back pain and lower limb numbness, which were relieved after the conservative treatment. The X-Stop device dropped out behind the spinous process in 3 patients. Among them, a patient had the X-Stop device removed, the other 2 patients with no obvious symptoms received no special treatment. During the follow-up, no other complications were found, such as spinous process fractures, lumbar kyphosis and adjacent segment degeneration. The low back pain JOA scores were increased from ( 13.30±2.79 ) points preoperatively to ( 27.55±1.38 ) points in the latest follow-up, and the differences were statistically signiifcant ( P<0.05 ). The back pain VAS scores were decreased from ( 5.74±0.97 ) points preoperatively to ( 1.06±0.92 ) points in the latest follow-up, and the differences were statistically signiifcant ( P<0.05 ). Conclusions The interspinous process spacer ( X-Stop ) is a more popular choice for DDD, because of its advantages of good clinical results, faster recovery, less trauma and fewer complications. But great attention should be paid in selecting appropriate surgical indications, and its long-term curative outcomes should be further studied.
Keywords：Lumbar vertebraeIntervertebral disc degenerationInternal ifxatorsSurgical proceduresoperative
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 224-229 )