The failure rate and complications were studied prospectively in 367 p
aediatric and adult patients who had received a thoracic or lumbar par
avertebral block. The overall failure rate was 10.1%; adults 10.7%; ch
ildren 6.2%. The frequency of complications were: hypotension: 4.6%; v
ascular puncture: 3.8%; pleural puncture: 1.1%; pneumothorax: 0.5%. Si
nce these results are similar to those found with alternative methods,
e.g, epidural, intrapleural and intercostal blocks, paravertebral blo
ck can be recommended as an effective, safe technique for unilateral a
nalgesia in both adults and children.