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MTP block anatomy and paravertebral spread – a reply

MTP block. What remains to be clarified at this stage is how much of the clinical effect of these new thoracic blocks is by spread of local anaesthetic into the paravertebral space, and how much is due to spread in other paraspinal fascial planes, to block cutaneous branches of the thoracic intercostal nerves. The evidence from this study suggests it is likely to be a combination of both of these mechanisms.