A 30-year-old man with chronic abdominal pain was referred to the Pain
Relief Unit after a course of unsuccesful diagnostic blocks and treat
ments. On admission, history, examination and clinical investigations
were consistent with a large pleural effusion due to a recent attempt
to chatheterise the intercostal space. Pleural drainage confirmed the
diagnosis of haemothorax. Percutaneous intercostal nerve blocks are us
ually considered as safe and simple and no-one to our knowledge has re
ported such a complication.