Background and aims Erector spinae plane block (ESPB) has been reported to have analgesic effects in a wide area of the ventral primary ramus of the spinal nerve. We examined whether it was useful as an analgesia method in thoracoabdominal aortic aneurysm (TAAA) surgery.

Methods We received informed consent from the patients and approval from the ethics committee of our hospital for the conference report. In a single institutional prospective observational study, the subjects underwent TAAA surgery between March and April 2019. the primary outcome was the Numerical Rating Scale (NRS), and the effect range, meal/drinking start timing, and ICU stay were investigated as secondary outcomes.

Results There were 2 subjects, and they both underwent artificial vascular replacement with 7th intercostal thoracotomy for TAAA (Crawford IV). Before surgery, ESPB was administered from the Th7 transverse process level, and 5 ml/h of 0.2% ropivacaine was administered as postoperative analgesia for 3 days. the postoperative max NRS was 2 and 3, respectively, and the effect range was cold sign Th6-L1, Th3-L3, pinprick Th7-L1, and Th3-L3. Both subjects were extubated the day after the operation, and they also started eating and drinking the day after the operation. They left the ICU 3 days after the operation.

Conclusions ESPB is excellent as analgesia management in TAAA surgery.