Background and Aims Abdominal wall blocks are frequently used due to the use of blocks that are effective, such as the transversus abdominis plane (TAP) block and the widespread use of ultrasound (US) imaging. We want to present the extraordinary performance of external oblique intercostal block in three different surgeries.

Methods A 30 – 35 year-old male patient was taken to the operating room for open liver surgery. After the surgery, unilateral external oblique intercostal block (EOI) and bilateral TAP block were performed in the supine position, and the catheter was placed under the external oblique muscle. Postoperative analgesia is followed by patient-controlled analgesia through the catheter.

A 35 – 40 year-old male patient was taken to the operating room for laparoscopic liver surgery. After the surgery, unilateral external oblique intercostal block (EOI) and bilateral TAP block were performed supine. The patient had iv tramadol PCA (only bolus dose 10 mg lockout 20 min).

A 25 – 30 year-old male patient was taken to the operating room for laparoscopic bariatric surgery. After the surgery, bilateral external oblique intercostal block (EOI) and bilateral RB were performed supine. The patient had iv tramadol PCA (only bolus dose 10 mg lockout 20 min).

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Abstract B338 Figure 1

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Abstract B338 Figure 2

Results All patients had low NRS scores in the recovery unit. All patients had very low opioid consumption within 72 hours postoperatively. All the patient was satisfied with the quality of analgesia.

Conclusions We think that EOI block will have a significant place in abdominal analgesia, especially in obese patients, due to its wide innervation area and easy application.