In this study, we aimed to evaluate the erector spina plane (ESP) block method that we used in our clinic with ultrasonography in pediatric cases between 1 month and 2 years of age who underwent laparotomy.

36 patients who will undergo laparotomy between the ages of 1 month and 2 years in ASA ( American Society of Anesthesiologists) I-II class will be included in the study. patients will be divided into 2 groups. Intraoperative erector spina plane block will be applied to the 1st group (group E) and intraoperative local anesthetic infiltration will be applied to the 2nd group (group L). Postoperative pain will be evaluated with the FLACC (face, legs, activity, crying, consolation) scale.

Inclusion Criteria:

• 1 month and 2 years of age
• ASA (American Society of Anesthesiologists) I-II class
• Patients who underwent nephrectomy, pyeloplasty, adrenal tumor excision with unilateral paramedian incision

Exclusion Criteria:

• Patients who underwent laparotomy with a midline incision
• Local infection at the injection site,
• Anatomical anomalies
• Allergies to local anesthetics,
• Coagulopathy,
• Liver, kidney failure patients