Ultrasound Guided Caudal Block for Benign Anal Surgery

Ultrasound Guided Analgesic Caudal Block in Anal Canal Surgery

Interventional study that evaluate analgesia and side effects of Ultrasound guided Caudal block preoperatively in benign canal anal surgery

Postoperative pain is an important symptom in patients after benign anal canal surgery. Caudal block has been described to decrease postoperative pain in this type of surgery. Ultrasound is a tool that facilitates its performance and increases the rate of a successful block.

Objective:

To determine the usefulness of ultrasound guided caudal block in anesthesia and postoperative analgesia in patients scheduled for benign anal surgery. Methods : Interventional study in adult patients that received ultrasound caudal anesthetic block before benign anal surgery. The investigators evaluated analgesic efficacy of this intervention by mean of numeric rating scale ( NRS) for pain after 6, 12 and 24 hours of surgery, rescue analgesia, motor block, urinary retention, surgical conditions and patient satisfaction in postoperative period.

Inclusion Criteria:

• age from 18 to 70 year old patient
• schedule for benign anal surgery ( hemorrhoids, anal fistula, fissure or abcess )
• Caudal analgesic injection before surgery
• Use of ultrasound to guide needle insertion into caudal space

Exclusion Criteria:

• cognitive impairment
• verbal communication impairment
• infection in skin at injection site
• coagulopathy
• technique refusal