Thick cement usage in percutaneous vertebroplasty for malignant vertebral fractures at high risk for cement leakage

To assess the feasibility and safety of transpedicular percutaneous vertebroplasty (PVP) using thick bone cement in patients with intractable metastatic vertebral pain and at high risk for cement leakage.

Unilateral transpedicular PVP using firm bone cement was performed in 77 patients with intractable pain due to vertebral metastases in the thoracolumbar spine, who had one or more relative contraindication to PVP. Primary outcome measures were the severity of pain as assessed on a 100-mm visual analogue scale and daily morphine consumption. Secondary outcome measures were the degree of disability and the incidence of procedure-related adverse outcomes. The outcome measures were assessed at the preoperative visit and at 1 day, 1 week, 4 weeks and 12 weeks after the procedure.

Sixty-three (81.8%) patients completed the 12-week follow-up period. There were 30 men and 33 women, with a mean age of 58±11 (SD) [range: 34-81 years]. Compared with pre-procedure value, all post-procedure pain scores were significantly lower (P<0.0001). Likewise, there was a statistically significant reduction in daily morphine consumption at all follow-up times (P<0.0001). The ambulation score, ADL, and ODI were all significantly lower at all assessment times compared with pre-procedure values (P<0.0001). No serious adverse effects were observed.

PVP using thick bone cement could be administered with reasonable safety to patients suffering from intractable pain caused by vertebral metastases who were at high risk for cement leakage. The procedure was associated with significant improvement of pain and disability.