论文部分内容阅读
目的:应用MRI技术探讨微创经椎间孔入路腰椎椎体间融合术（minimally invasive surgery transforaminal lumbar interbody fusion，MIS-TLIF）对腰椎多裂肌的影响及其临床意义。方法:选取2016年9月至2019年7月青岛大学附属医院因单节段（L n 3，4、L n 4，5、L n 5Sn 1）单侧症状椎间盘突出症接受MIS-TLIF手术者23例，均于手术前1周内和手术后3、6个月行腰椎MR检查，在轴位T2加权像测量术前及术后椎间盘不同层面对应轴切面的多裂肌截面积（axial section of multifidus muscle cross section area，AxCSA）、长短径线比值（ratio of long and short lines，RLS）、多裂肌脂肪浸润截面积（axial section of muscle fat infiltration cross section area，FLSA）与AxCSA比值记为FLSA/AxCSA。比较患者手术前后腰椎患侧和健侧、病变与非病变节段多裂肌各项指标的变化，观察MIS-TLIF术式对多裂肌形态学的影响。对患者术前及术后6月分别进行患侧肌肉截面核磁共振波谱（magnetic resonance spectroscopy，MRS）测量，对比n 1H谱肌细胞内脂质（intramyocellular lipid，IMCL）与细胞外脂质（extramyocellular lipid，EMCL）积分值比值，评估脂肪浸润的程度。n 结果:单节段腰椎间盘突出症患者术前病变节段AxCSA健侧较患侧大（n t=6.611，n P0.05），术后短期随访双侧肌容积有均等优势。患侧病变节段FLSA/AxCSA术前为9.5%±3.8%，术后3个月为8.7%±1.5%，差异有统计学意义（ n t=3.163，n P 0.05), which suggested bilateral muscle volume equal advantageat short-term follow-up. The FLSA/AxCSA of affected segment before and after 3 months was 9.5%±3.8% and 8.7%±1.5%, and the difference was statistically significant (n t=3.163, n P<0.05); the RLS of affected segment before and after 3 months was 3.3%±0.24% and 2.7%±0.83%, and the difference was statistically significant (n t=3.42, n P<0.05). The medians of EMCL/IMCL before and after 6 months of MRS were 2.010 and 1.475, respectively, and EMCL decreased after 6 months (n Z=0.48, n P<0.05).n Conclusion:Patients with single-segment lumbar disc herniation have different morphology of bilateral multifidus muscle before surgery. MIS-TLIF has little effect on the multifidus muscle of the surgical side. MIS-TLIF significantly reduces extracellular lipid accumulation, promotes intracellular transfer, and increases intracellular fat metabolism. Its retention of muscle attachment points and limited fixation can also reshape compensatory muscle atrophy.