As a novel minimally invasive technique,percutaneous endoscopic transforaminal lumbar interbody fusion(PETLIF)has been widely used in the treatment of lumbar degenerative diseases.The purpose of this study was to anal...As a novel minimally invasive technique,percutaneous endoscopic transforaminal lumbar interbody fusion(PETLIF)has been widely used in the treatment of lumbar degenerative diseases.The purpose of this study was to analyze these two operation types’biomechanical performances of PE-TLIF and traditional minimally invasive transforaminal lumbar interbody fusion(MIS-TLIF)using the finite element(FE)method.The intact FE models of L4-L5 were established and validated based on the CT images.On this basis,the FE models of MIS-TLIF and PETLIF were established and analyzed.It is demonstrated that for lumbar interbody fusion with the oblique asymmetrically implanted cage under bilateral pedicle screws and rods fixation,such as MIS-TLIF and PE-TLIF,different degrees of articular process resection have no significant effect on the cage subsidence,and the surgical segment can achieve similar stability.In addition,the maximum stress of the L4 inferior endplate of MIS-TLIF and PE-TLIF is greater than that of the L5 superior endplate,which indicates that MIS-TLIF and PE-TLIF can cause cage subsidence in the L4 inferior endplate.展开更多
Objective： To evaluate the lumbar stability and the primary clinical results of unilateral facetectomy, transforaminal lumbar interbody fusion （TLIF） and unilateral pedicle screw fixation by X-Tube system. Methods...Objective： To evaluate the lumbar stability and the primary clinical results of unilateral facetectomy, transforaminal lumbar interbody fusion （TLIF） and unilateral pedicle screw fixation by X-Tube system. Methods： Five human lumbar cadaveric functional spine units（FSU） were obtained and graded facetectomy by 0, 1/4, 1/2, 3/4 and 4/4 were performed respectively on the left articular process of them. The stability of these 5 models was evaluated at flexion, extension, lateral bending and axial rotation. After a serial of biomechanical researches, 23 patients from June 2004 to March 2006 in our department underwent unilateral facetectomy, transforaminal lumbar interbody fusion （posterior lumbar interbody fusion） and unilateral pedicle screw instrumentation by X-Tube system. After general anaesthesia, with the guide of fluoroscopy and using X-Tube system, procedures of unilateral endoscopic facetectomy, spinal nerve root decompression, autologus spongy bone transplantation, one cage oblique insertion and unilateral pedicle screw instrumentation were performed. Results： There was no significant difference in flexion, extension, lateral bending and axial rotation of lumbar motion range after unilateral graded facetectomy. The stability of left/right axial direction was greatly affected when the range of graded facetectomy exceed 1/2. According to the Nakai criteria, for the 23 patients, the clinical result was excellent in 15 （65.2%）, good in 6 （26.1%） and fair in 2 （8.7%）. The fusion rate was 95.6% in excellent and good cases. Although partial absorption of bone grafts was observed in 1 case which might indicate a unsuccessful fusion, there was no loosing and replacement of instrument and no clinical symptoms occurred. Conclusion： The lumbar stability will be affected significantly when the range of graded facetectomy exceeds 1/2. Procedures of unilateral facetectomy, transforaminal lumbar interbody fusion and unilateral pedicle screw fixation is an optional strategy for microsurgical reconstruction, though the indications of the procedure should be carefully restricted.展开更多
基金the National Natural Science Foundation of China(No.11972242,11632013)China Postdoctoral Science Foundation(2020M680913)Shanxi Province Medical Science and Technology Innovation Team Construction Plan(2020TD13).
文摘As a novel minimally invasive technique,percutaneous endoscopic transforaminal lumbar interbody fusion(PETLIF)has been widely used in the treatment of lumbar degenerative diseases.The purpose of this study was to analyze these two operation types’biomechanical performances of PE-TLIF and traditional minimally invasive transforaminal lumbar interbody fusion(MIS-TLIF)using the finite element(FE)method.The intact FE models of L4-L5 were established and validated based on the CT images.On this basis,the FE models of MIS-TLIF and PETLIF were established and analyzed.It is demonstrated that for lumbar interbody fusion with the oblique asymmetrically implanted cage under bilateral pedicle screws and rods fixation,such as MIS-TLIF and PE-TLIF,different degrees of articular process resection have no significant effect on the cage subsidence,and the surgical segment can achieve similar stability.In addition,the maximum stress of the L4 inferior endplate of MIS-TLIF and PE-TLIF is greater than that of the L5 superior endplate,which indicates that MIS-TLIF and PE-TLIF can cause cage subsidence in the L4 inferior endplate.
文摘目的:比较后入路腰椎椎体间融合术(posterior lumbar interbody fusion,PLIF)和经皮内镜下经椎间孔腰椎椎体间融合术(percutaneous endoscopic transforaminal lumbar interbody fusion,PE-TLIF)治疗单节段腰椎管狭窄症的临床疗效及其对椎旁肌的影响。方法:本前瞻性研究纳入本院2019年1月~2022年1月收治的52例L4/5单节段腰椎管狭窄症患者。其中,PLIF组22例,女性10例,男性12例,年龄60.2±10.3岁;PE-TLIF组30例,女性14例,男性16例,年龄60.4±12.3岁。对比两组手术时间、术中出血量、术后引流量、术后卧床时间等围手术期指标;比较术前与术后1d及1周血清肌酸激酶(creatine kinase,CK),术前与术后6个月及12个月多裂肌(multifidus,MF)横截面积(cross-sectional area,CSA)、脂肪浸润(fatty infiltration,FI)评分及肌肉CT密度等椎旁肌评估指标;比较两组患者术前、术后1d、1周、6个月及12个月腰痛视觉模拟评分(visual analogue scale on low back pain,VAS-LBP)、腿痛视觉模拟评分(visual analogue scale on leg pain,VAS-LP)、Oswestry功能障碍指数(Oswestry disability index,ODI)。对两组术后并发症发生情况进行比较,术后12个月根据Bridwell标准评估两组椎间融合情况。结果:PE-TLIF组与PLIF组手术时间(211.2±38.5min vs 98.9±31.6min,P=0.000)、术后卧床时间(25.9±8.3h vs 52.4±14.8h,P=0.001)、术中失血量(112.8±79.6mL vs 232.5±122.5mL,P=0.002)、术后引流量(46.5±28.2mL vs 283.6±142.1mL,P=0.000)相比,差异均具有统计学意义。PE-TLIF组与PLIF组术前、术后6个月及12个月目标节段MF CSA组间比较均无明显差异(P>0.05),两组术前与术后6个月及12个月的目标节段MF CSA组内比较无明显差异(P>0.05)。PE-TLIF组与PLIF组术前、术后6个月目标节段MF FI评分组间比较无统计学差异(P>0.05),术后12个月,PLIF组目标节段MF FI评分较PE-TLIF组高,差异具有统计学意义[3.0(3.0,4.0)vs 3.0(2.8,3.0),P=0.031];PE-TLIF组术前与术后6个月、12个月目标节段MF FI评分组内比较无明显差异(P>0.05),PLIF组术前与术后6个月目标节段MF FI评分组内比较未发现明显差异(P=0.257),而术前与术后12个月比较,差异具有统计学意义[3.0(2.0,3.3)vs 3.0(3.0,4.0),P=0.016]。术前、术后6个月两组患者MF CT密度相比较无明显差异(P>0.05)。术后12个月,PLIF组目标节段MF密度明显降低,差异具有统计学意义[PE-TLIF:34.2(31.8,36.9)HU;PLIF:30.5(28.5,32.1)HU,P=0.000]。组内比较,PE-TLIF组术前与术后6个月、12个月目标节段MF肌肉密度比较差异无显著统计学意义(P>0.05)。PLIF组术前与术后6个月目标节段MF CT密度比较,未发现明显差异(P=0.516),术后12个月较术前明显升高,差异具有统计学意义[34.6(30.5,36.4)HU vs 30.5(28.5,32.5)HU,P=0.017]。PE-TLIF组与PLIF组术前CK值无明显差异(P=0.712)。术后1d、7d,PE-TLIF组CK值低于PLIF组(P<0.05)。PE-TLIF组与PLIF组患者术后随访VAS-LP、VAS-LBP评分以及ODI均优于术前,差异具有统计学意义(P<0.05)。术后1d、7d,PE-TLIF组VAS-LBP评分表现优于PLIF组(P<0.05)。术后6个月、12个月,两组患者的VAS-LBP评分比较无明显差异(P>0.05)。两组患者的VAS-LP评分以及ODI在随访时无明显差异(P>0.05)。两组患者术后并发症发生率比较无统计学差异(P=0.379),术后12个月两组患者椎间融合情况比较无统计学差异(P=0.877)。结论:PE-TLIF治疗单节段腰椎管狭窄症可获得与传统PLIF手术相同的临床疗效,且减小了对椎旁肌的影响,可减轻手术创伤。
文摘Objective： To evaluate the lumbar stability and the primary clinical results of unilateral facetectomy, transforaminal lumbar interbody fusion （TLIF） and unilateral pedicle screw fixation by X-Tube system. Methods： Five human lumbar cadaveric functional spine units（FSU） were obtained and graded facetectomy by 0, 1/4, 1/2, 3/4 and 4/4 were performed respectively on the left articular process of them. The stability of these 5 models was evaluated at flexion, extension, lateral bending and axial rotation. After a serial of biomechanical researches, 23 patients from June 2004 to March 2006 in our department underwent unilateral facetectomy, transforaminal lumbar interbody fusion （posterior lumbar interbody fusion） and unilateral pedicle screw instrumentation by X-Tube system. After general anaesthesia, with the guide of fluoroscopy and using X-Tube system, procedures of unilateral endoscopic facetectomy, spinal nerve root decompression, autologus spongy bone transplantation, one cage oblique insertion and unilateral pedicle screw instrumentation were performed. Results： There was no significant difference in flexion, extension, lateral bending and axial rotation of lumbar motion range after unilateral graded facetectomy. The stability of left/right axial direction was greatly affected when the range of graded facetectomy exceed 1/2. According to the Nakai criteria, for the 23 patients, the clinical result was excellent in 15 （65.2%）, good in 6 （26.1%） and fair in 2 （8.7%）. The fusion rate was 95.6% in excellent and good cases. Although partial absorption of bone grafts was observed in 1 case which might indicate a unsuccessful fusion, there was no loosing and replacement of instrument and no clinical symptoms occurred. Conclusion： The lumbar stability will be affected significantly when the range of graded facetectomy exceeds 1/2. Procedures of unilateral facetectomy, transforaminal lumbar interbody fusion and unilateral pedicle screw fixation is an optional strategy for microsurgical reconstruction, though the indications of the procedure should be carefully restricted.
