Efect of Erector Spina Plane Block on Mastectomy

After breast cancer surgery, more than 60% of patients experience persistent pain.Although opioids are the main method of use in postoperative pain management, there are side effects such as constipation, sedation, respiratory depression, urinary retention, itching, postoperative nausea and vomiting.Erector spina plane block (ESPB) is a technique used in many surgeries for anesthesia and analgesia.It is frequently preferred by anesthesiologists for postoperative analgesia recently because it is easy to apply and no complications are reported in the literature.ESPB with arms of iliocostalis, longissimus and spinalis, is located parallel to the spine, from the back of the skull to the pelvis.The injected local anesthetic is distributed in many levels in the cranio-caudal direction and blocks the intercostal spinal nerves, causing sensory block.Providing the necessary perioperative analgesia due to the complex innervation of the breast tissue is a big controversy among anesthesiologists.Multimodal analgesia methods with various regional blocks are more preferred.ESPB block is also preferred as another method since it provides both perioperative and postoperative analgesia.In studies conducted on cadavers, it has been shown that local analgesia spreads to the paravertebral area when applied under the Erektor Spina muscle.Technically, compared to the paravertebral block,the ESPB has proven to be more reliable and easier in terms of pleural puncture risk. ANI is a monitoring method used in the evaluation of acute nociception and pain.Analyzes the instantaneous changes in heart rate due to the activation of the parasympathetic nervous system using respiratory sinus arrhythmia.A value between 0-100 is obtained.If parasympathetic modulation is very low, a value of 0 is obtained, if it is high, a value of 100 is obtained.ANI detects the noxious stimulus more specifically and sensitively than heart rate and blood pressure changes. Application of anesthesia and having ANI val