• Burhan Dost, Cengiz Kaya, Esra Turunc, Hilal Dokmeci, Semih Murat Yucel, and Deniz Karakaya.
• Department of Anesthesiology and Reanimation, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey. burhandost@hotmail.com.
• BMC Anesthesiol. 2022 Sep 16; 22 (1): 295.

BackgroundWe aimed to compare the effectiveness of bilateral erector spinae plane (ESP) block and superficial parasternal intercostal plane (S-PIP) + ESP block in acute post-sternotomy pain following cardiac surgery.MethodsForty-seven patients aged between 18 and 80 years of age with American Society of Anesthesiologists class II-III due to undergo median sternotomy for cardiac surgery were included in this prospective, randomized, double-blinded study. Following randomization into two groups, one group received bilateral ultrasound-guided ESP and the other S-PIP plus ESP block. Morphine consumption within the first 24 h after surgery was the primary outcome of the study while NRS scores at rest, NRS scores when coughing, time taken until extubation, use of rescue analgesic, presence of nausea/vomiting, length of hospital and intensive care unit (ICU) stay, and patient satisfaction were secondary outcome measures.ResultsMorphine use up to 24 h following surgery was statistically significantly different between the ESP block and ESP + S-PIP block groups (18.63 ± 6.60 [15.84-21.41] mg/24 h vs 14.41 ± 5.38 [12.08-16.74] mg/24 h, p = 0.021). The ESP + S-PIP block group had considerably reduced pain scores compared to the ESP block group across all time points. Rescue analgesics were required in 21 (87.5%) patients in the ESP block group and seven (30.4%) in the ESP + S-PIP group (p < 0.001). PONV, length of stay in the ICU and hospital, and time to extubation were similar between groups.ConclusionsIn open cardiac surgery, the combination of ESP and S-PIP blocks lowers pain scores and postoperative morphine requirement of patients.Trial RegistrationClinicaltrials Registration No: NCT05191953, Registration Date: 14/01/2022.© 2022. The Author(s).

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