Retrolaminar Block Improves Postoperative Gastrointestinal System Functions:

Patients were placed on their side and then T9, T10 vertebrae were marked. After the skin was cleaned and the area was covered with sterile drape. A linear ultrasound probe (6-13 Hz, Hitachi Europe Ltd, Tokyo, Japan) was placed in the middle of the vertebral bodies to image the T9, T10 vertebraes. An experienced anaesthesiologist in RLB performed the procedures with a USG-guided 1-15 Hz convex probe (8-4, Hitachi Europe Ltd, Tokyo, Japan) by in-plane approach. A puncture needle (21Gx100mm, USG-Type CCR, Vygon Co. Ltd. Ecouen, France) was inserted 1 cm from the probe at a 45-degree angle to the skin, targeting the lamina of the desired vertebra. The needle was gently withdrawn to ensure that no blood or cerebrospinal fluid was present. 10 mL of 0.25% bupivacaine (Bupivon®) was injected posterior to each lamina (T9, T10), totalling 20 mL

Patients were placed on their side and then T9, T10 vertebrae were marked. After the skin was cleaned and the area was covered with sterile drape. A linear ultrasound probe (6-13 Hz, Hitachi Europe Ltd, Tokyo, Japan) was placed in the middle of the vertebral bodies to image the T9, T10 vertebraes. An experienced anaesthesiologist in RLB performed the procedures with a USG-guided 1-15 Hz convex probe (8-4, Hitachi Europe Ltd, Tokyo, Japan) by in-plane approach. A puncture needle (21Gx100mm, USG-Type CCR, Vygon Co. Ltd. Ecouen, France) was inserted 1 cm from the probe at a 45-degree angle to the skin, targeting the lamina of the desired vertebra. The needle was gently withdrawn to ensure that no blood or cerebrospinal fluid was present. 10 mL of 0.25% bupivacaine (Bupivon®)was injected posterior to each lamina (T9, T10), totalling 20 mL.