Observation and Clinical Analysis for Cement Leakage after Percutaneous Vertebroplasty and Per-cutaneous Kyphoplasty

Zhang Kai; Wang Ou; Jia Long

Abstract：Objective To observe and analyze for cement leakage after percutaneous vertebroplasty(PVP)and percutane-ous kyphoplasty(PKP)in osteoporotic vertebral compression fracture. Methods From January 2010 to October 2014,78 pa-tients(93 vertebrae)with osteoporotic vertebral compression fracture were treated with PKP and PVP. 31 cases(36 vertebral body)were randomly divided into PVP group;PKP group holds the set of 47 cases(57 vertebral body). Computed tomography (CT)and X-ray was performed to determine and analyze the cement leakage after operation. The patterns of cement leakage were classified as six types:no leakage type;through a cortical defect or para-vertebral vein into the para-spinal tissues;via the needle channel;through a cortical defect into the disc space;leak into spinal canal and mixed cement leakage(including two or more types). Results All patients were analyzed by preoperative and postoperative CT scan in PVP group there were 12 verte-bral bodies(33. 3% )occurred cement leakage,10 vertebral bodies(17. 6% )occurred cement leakage in PKP group. PVP group had 6 para-vertebral type,1 disc type,1 spinal canal type,2 pedicle type and 1 mixed type. PKP group had 5 para-verte-bral type,2 spinal canal type,1 pedicle type and 2 mixed type. 2 patients of mixed type had neural symptoms. After the emer-gency surgery to take out the cement in the spinal canal,neural symptoms were relieved. All of patients were followed up for 3~ 6 months. None of patients had neurologic symptoms and complications again. Conclusion PVP has higher incidence of bone cement leakage than PKP. Para-vertebral type is the most common types,followed by leakage of spinal canal.