• Masakazu Hirakawa, Nobuo Kobayashi, Mitsutomi Ishiyama, Sokun Fuwa, Yukihisa Saida, Hiroshi Honda, and Yuji Numaguchi.
• Department of Radiology, St. Luke's International Hospital, Tokyo, Japan. mahira@radiol.med.kyushu-u.ac.jp
• Jpn J Radiol. 2012 Jun 1;30(5):407-14.

PurposeWe evaluated the relationships between pre-procedural radiological findings and short-term pain relief in patients with osteoporotic compression fractures after percutaneous vertebroplasty (PVP).Materials And MethodsA retrospective review of pre-procedural radiological images of 156 patients with painful osteoporotic compression fracture was performed. Pain was measured with a visual analogue scale (VAS). Complete pain relief was defined as a VAS pain score of 0 or 1 at 3 months after PVP. Statistical analyses were conducted to evaluate the relationship between the pre-procedural imaging factors and pain relief using Pearson's chi-squared test. Multivariate logistic regression analysis was also performed.ResultsComplete pain relief was obtained in 45.5% of patients. An intravertebral cleft larger than half the height of the fractured vertebral body (FVB) was a significant key factor in the complete pain relief group after 3 months. Further, ≥40% of the spinal canal occupied by bony fragments of the FVB was related to incomplete pain relief.ConclusionA large intravertebral cleft was a favorable short-term outcome predictor in patients with osteoporotic compression fractures after PVP, while severe protrusion of the FVB causing lumbar spinal canal stenosis was not a favorable short-term outcome predictor of complete pain relief.

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