Interventional Radiology - Original Article

The value of angio-CT system on splanchnic nerve neurolysis


  • Shinji Wada
  • Yasuaki Arai
  • Miyuki Sone
  • Shunsuke Sugawara
  • Chihiro Itou

Received Date: 23.06.2020 Accepted Date: 15.11.2020 Diagn Interv Radiol 2021;27(3):408-412


We aimed to evaluate the effectiveness and safety of splanchnic nerve neurolysis (SNN) with angio-CT, a hybrid system combining computed tomography (CT) with X-ray fluoroscopy.


Thirty-three SNN procedures with angio-CT performed in 30 patients with severe epigastric cancer pain (11 males and 19 females; median age, 57 years; age range, 19–79 years) between January 2010 and July 2017 were retrospectively evaluated. The primary endpoints were the technical success and adverse event rates. The secondary endpoints included the clinical success rate, defined as a reduction in the numerical rating scale for pain score or a decrease in the consumption of analgesics on day 1 and at 1–2 weeks after the procedure; procedure time; the number of needle punctures; amount of ethanol required; and the distribution of contrast medium in the retrocrural space. These endpoints were compared with previous studies that did not employ the angio-CT system.


The technical success rate was 96.97%. There were two procedure-related adverse events (one retroperitoneal hemorrhage, one pneumothorax). The clinical success rates on day 1 and at 1–2 weeks after the procedure were 84.38% and 87.5%, respectively. The median procedure time was 60 minutes. The median number of needles used was 2. The median amount of ethanol used was 20 mL.


SNN under angio-CT is safe and effective, with excellent technical and clinical success rates and acceptable adverse event rates. These results are comparable with previous studies that did not involve angio-CT. However, the use of angio-CT allows for easier needle positioning and an earlier response to complications compared with conventional methods.