Classic transcrural celiac plexus block simulated on 100 computed tomography images.

STUDY OBJECTIVE: To evaluate intra-abdominal needle trajectories of the classic transcrural celiac plexus block (tCPB) with a simulation technique. DESIGN: Classic tCPB technique cited from 10 latest authoritative textbooks were simulated on abdominal computed tomography images retrospectively. SETTING: University-affiliated community hospital. MEASUREMENTS: One hundred axial computed tomography images across the celiac trunk were retrieved. Three lines simulating classic tCPB were executed on each image. The organs traversed by each line were noted and analyzed. The frequencies of organ traverse were compared with the incidences described in the literature. MAIN RESULTS: All 3 lines traversed various organs with different frequencies. The right side line frequently traversed the right kidney (36%). The left side line always traversed the aorta (100%). The modified line on the right side frequently traversed the inferior vena cava (32%). The highest kidney traverse percentage on both sides and the highest aorta traverse percentage on the right side were observed in pancreatic cancer patients. CONCLUSIONS: Despite uncommon clinical complications, classic tCPB needle placement frequently traversed through several key organs in this simulation series. Organ penetrations could be avoided by needle trajectory adjustment.

Computed tomography celiac trunk topography relating to celiac plexus block.

BACKGROUND AND OBJECTIVES: The celiac plexus is a dense autonomic network surrounding the celiac trunk. To block this plexus, the celiac trunk is a landmark for needle placement. Needles inserted at a distance from the midline, "walking off" the vertebra, may penetrate surrounding organs. We reviewed 200 computed tomography images to investigate the celiac trunk topography relating to the block. METHODS: Two hundred computed tomography images across the celiac trunk were displayed. The celiac emergence level and celiac-aortic-vertebral anatomies were examined. On each image, 2 needle trajectories imitating walking-off technique were placed tangential to the vertebral body passing through the crus of the diaphragm on both sides: L-9s and L-4.5s (9 and 4.5 cm from the midline, respectively). The vital organs traversed by these lines were noted and analyzed. RESULTS: Celiac emergence levels: T11-12, 6.5%; T12, 34%; T12-L1, 31%; L1, 28.5%. Aortic locations: 70% were anterior-left to and 29% were anterior-middle to the vertebra. Celiac runoffs: 63.5% from the aorta anterolaterally on the left, 36% from the midportion. Celiac-aortic-vertebral correlations showed a various distribution in groups; 88% L-9s and 64% L-4.5s on the right side, and 96% L-9s and 88% L-4.5s on the left side traversed different vital organs with various frequencies. CONCLUSIONS: The celiac trunk anatomy varies. Blocking needles walking off the vertebra from a fixed distance frequently traverse vital organs. Previewing celiac-aortic-vertebral topography with a simulating block on individual patient's computed tomography (CT) image for accordant needle placement subsequently is warranted.