A complication and risk factor analysis of Coflex interlaminar dynamic stabilization
ZHANG Yang-pu
HAI Yong
YANG Jin-cai
ZHOU Li-jin
CHEN Xiao-long
PAN Ai-xing
ZHANG Yao-shen
LIU Chang
Abstract：Objective To summarize the incidence and causes of postoperative complications in patients who underwent Coflex interlaminar dynamic stabilization surgery, and to analyze the risk factors of complications. Methods A retrospective study was conducted. Patients who underwent single-segment decompression and Coflex interlaminar dynamic stabilization implantation from 2007 to 2015 were included. Demographic, clinical and imaging data were collected. The incidence of complications was recorded. Causes and reoperations due to all kinds of complications were summarized. Univariate analysis and multivariate Logistic analysis of all possible factors were used to determine the independent risk factors for the occurrence of complications. Results A total of 164 patients were enrolled in this study. There were 72 males and 92 females with an average age of ( 57.70 ± 12.29 ) years. The mean follow-up time was ( 31.11 ± 20.44 ) months. Lumbar spinal stenosis was diagnosed in 90 cases ( 54.9% ), lumbar disc herniation in 68 cases ( 41.5% ), lumbar spondylolisthesis in 6 cases ( 3.7% ). Surgical segments: 148 cases ( 90.2% ) were of L4-5segments, 5 cases ( 3% ) of L3-4segments, 1 case of L2-3segments ( 0.6% ), 10 cases of L5- S1segments ( 6.1% ). The average operation time was ( 124.02 ± 24.12 ) min. The average bleeding volume was ( 178.48 ± 111.85 ) ml. Complications occurred in 26 patients ( 15.9%, 26 / 164 ): 2 cases ( 7.1% ) were of general surgical complications, 6 cases ( 14.3% ) of direct device-related complications, 19 cases ( 67.9% ) of indirect device-related complications, 1 case ( 3.6% ) of other complications. Ten patients ( 6.1%, 10 / 164 ) underwent revision surgeries. Risk factor analysis showed that the operation time, body mass index ( BMI ), Modic change of Coflex segment's end plate, disc compression of the spinal canal accounted for independent risk factors of the complication occurrence. Conclusions The complication rate of Coflex interlaminar dynamic stabilization is 15.9% and the reoperation rate is 6.1%. The main causes of complications: the degeneration of the original surgical segments and adjacent segments. The independent risk factors of complication occurrence: operation time, BMI, disc compression of the spinal canal, Modic change of surgical segment's end plate.
Keywords：Spinal diseasesLumbar vertebraePostoperative complicationsReoperationRisk factorsNon-fusion technique
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 103-109 )