20 ga 4 inch ultraplex needle

Bilateral ultrasound-guided ESPBs were performed with the patient in prone position after induction of general anesthesia, prior to surgical incision. Blocks were performed by experienced attending anesthesiologists, all of whom were fellowship-trained in regional anesthesia and were members of a dedicated spine-anesthesia service. A C60 curved array ultrasound probe (FUJIFILM Sonosite, Inc., WA, USA) was placed in parasagittal orientation in the midline to identify the spinous processes. The probe was translated laterally until the tips of the transverse processes were viewed. A 20-Ga 4-inch Ultraplex needle (B. Braun Medical Inc., PA, USA) was placed in-plane and advanced in a cranial-to-caudal direction until the tip was under the erector spinae plane. Depending on patient body mass index (BMI), between 20 and 30 mL 0.25–0.375% bupivacaine was injected bilaterally at the tips of the transverse process/under visual guidance.

Bilateral ultrasound-guided ESPBs were performed with the patient in prone position after induction of GA, prior to surgical incision, as previously described.8 (link) In brief, the tips of the transverse processes at the relevant spinal level were visualized using a C60 curved array ultrasound probe (FUJIFILM Sonosite, Inc., WA, USA). A 20-Ga 4-inch Ultraplex needle (B. Braun Medical Inc., PA, USA) was placed in-plane and advanced in a cranial-to-caudal direction until the tip was under the erector spinae plane. Depending on patient body mass index (BMI), between 20 and 30 mL 0.25–0.375% bupivacaine was injected bilaterally.