Erector Spinae Plane Block Reduces Postoperative Pain Following Laparoscopic Colorectal Operation

.The goal of this study is to evaluate the effect of ultrasound guided erector spinae plane block on postoperative pain and quality of recovery after laparoscopic colon surgery.

• Erector Spinae Plane Block (Procedure): The transducer was placed vertically 3cm lateral to the midline to visualize the muscles of the back, transverse process and the pleura in between the two transverse processes. After local infiltration of the needle insertion site with 2-3 ml of 2% lidocaine needle was inserted in cranial-caudal direction towards the transvers process using in plane technique until the needle cross all the muscles then interfascial injection of 20ml local anesthetics is done after ensuring negative aspiration, the procedure was repeated following the same steps on the other side of the back.
• Intravenous fentanyl patient control device (Procedure): 24-hour fentanyl consumption will be recorded.

Primary outcomes

• numerical rating scale on rest and cough [24 hours after surgery]: In the recovery room, post op 6hours, post op 24 hours

Secondary outcomes

• opioid consumption [24 hours after surgery]: In the recovery room, post op 6hours, post op 24 hours
• Quality of Recovery [1day before operation, post op 24 hours]: pre operative QoR 40 scores compares
• need for analgesics [24 hours after surgery]: Number of patients who required analgesic in the first 24 hour

Sex: All, ages: 20 Years to 70 Years

Inclusion Criteria:

* aged between 20 and 70 years, with an American Society of Anesthesiologists physical status of 1 or 2, who were scheduled for laparoscopic colorectal operation

Exclusion Criteria:

* sensitivity to local anesthetic, bleeding disorders , receiving anticoagulant, body mass index (BMI) over 35/kg/m2 spine or chest wall deformity pregnancy tolerance to opioid analgesics inability to use patient-controlled analgesia (PCA)

• hyunjeong kwack, md,phd, Study director, Gachon University Gil Medical Center