Background: Serratus anterior plane block (SPB) is a relatively new regional anesthetic technique that provides long-lasting anesthesia, extended postoperative analgesia, and demonstrates less consumption of opioid analgesic compared to local infiltration anesthesia (LIA). Objective: To compare the outcomes of SPB and LIA as anesthetic techniques among patients undergoing chest tube thoracostomy (CTT) insertion. Design: Cohort study. Setting: Department of Surgery, Southern Philippines Medical Center, from October 2017 to May 2019. Participants: 110 male and female patients aged >18 years old undergoing CTT given either SPB or LIA. Main outcome measures: Mean VAS during the procedure, at PACU, and 4, 8, 12, 16, 18, and 24 hours postoperatively. Main results: Of the 110 patients undergoing CTT in this study, 55 (50%) where under SPB, and the remaining 50% where under LIA. Compared to those under LIA, patients under the SPB group had significantly lower mean VAS during the procedure (4.02 ± 1.43 vs 2.76 ± 1.35; p<0.0001), and at post-anesthesia care unit (4.25 ± 1.87 vs 3.15 ± 1.56; p=0.0010). The mean level of physician's satisfaction on the procedure was significantly higher in the SPB group than in the LIA group (3.56 ± 0.50 vs 2.96 ± 0.33; p<0.0001). The mean dose of fentanyl as supplemental anesthetic agent was significantly higher in the LIA group than those in the SPB group (1.38 ± 0.59 vs 0.95 ± 0.29; p<0.0001). Similarly, the mean dose of nalbuphine, as rescue opioid dose, was significantly higher in the LIA group than in the SPB group (2.16 ± 0.57 vs 1.53 ± 0.57; p<0.0001). Conclusion Patients under SPB who underwent CTT had less pain during the procedure and at the PACU, and used lower doses of the supplemental anesthetic agent (fentanyl) during the procedure, and of the rescue opioid analgesic (nalbuphine), postoperatively.
Anesthesia, Conduction