Minimally Invasive Lumbar Pedicle Screw Implantation On Paravertebral Soft Tissue Damage Assessment

ObjectiveAnalysis of Quadrant system combines Sextant system downlink between lumbar vertebral fusion and approved by vertebral side clearance approach combining the intervertebral foramen vertebral fusion (TLIF) between technical differences to the injury of soft tissue, seeking a more minimally invasive surgery for patients.MethodUsing prospective randomized controlled study, selecting guangdong hospital of spine specialist in October2011and October2011-line due to lumbar degenerative disease L4/540cases of patients with lumbar fusion, randomly divided into control group and experimental group20cases each. Experimental line Quadrant system combining Sextant system between lumbar vertebral fusion (10cases of lumbar disc prolapse of lumbar olisthe10cases),12cases of male, female8cases;32~61years old, average48.8years;Control group through vertebral side clearance approach combining the intervertebral foramen between vertebral fusion (TLIF)(12cases of lumbar disc prolapse of lumbar olisthe8cases),12cases of male, female8cases;39~58years old, average50.5years. Comparison of two groups of cases operation time, intraoperative blood loss, postoperative and preoperative and postoperative drain1,4,7level of creatine phosphate kinase (CPK), the evaluation of postoperative patients with more than one year of visual analogue scale (VAS) and Oswestry disability index score.20cases of experimental group and20cases of control group respectively L4/5patients segment level crack more muscle cross-sectional area.ResultPatients have been followed for follow-up time11-14months, an average of12months. Two groups have no postoperative wound infection, cerebrospinal fluid leakage and other complications. Operation time of experimental group and control group were150±20.4min and174±25.2min, there was no significant difference is compared between two groups (P>0.01). Intraoperative blood loss and postoperative of experimental group (120±8.3ml) and (100ml)5.2mm less than the control group (289±72.4ml) and (150±8.4ml), have significant difference (P<0.01). Two groups of preoperative and postoperative1year VAS score and the percentage of ODI two groups of patients before operation were alleviated, there was no significant difference is compared between two groups (P>0.01). Forward experimental group and control group in L4/5operation segment vertebral side muscle area change, respectively was (1135.7±1135.7) and (932.5±160.3) was no significant difference (P>0.01);Between the two groups in L4/5operation segment crack muscle there was no significant difference in survival rate (P>0.01);1,4,7patients postoperative day creatine kinase level is lower than the control group. Experimental group and control group there was no significant change in how torn muscle cross-sectional area, slightly fat. ConelusionAnd approved by vertebral side clearance approach combining the intervertebral foramen between vertebral fusion (TLIF), Quadrant system combining Sextant system downlink lumbar vertebral fusion between vertebral side muscle damage, but the Quadrant system combining Sextant system downlink between lumbar vertebral fusion on vertebral side muscle damage is less than the traditional intervertebral foramen fusion between lumbar vertebral body.