Comparing the Harmonic Scalpel with Electrocautery in Reducing Postoperative Flap Necrosis and Seroma Formation after Modified Radical Mastectomy in Carcinoma Breast Patients: A Double-Blind Prospective Randomized Control Trail.

Introduction Only a few studies compare the efficacy of the harmonic scalpel and electrocautery in performing mastectomies, and these have mainly compared their intraoperative parameters. But the main concern with electrocautery is the incidence of flap necrosis and seroma formation. Therefore, this study was done to determine if the harmonic scalpel has any advantages over electrocautery in reducing postoperative flap necrosis and seroma formation in patients undergoing a modified radical mastectomy (MRM). Methodology This randomized control trial was carried out over a one-year period in a tertiary care centre in South India. The study patients were randomized into an electrocautery group and a harmonic scalpel group. In the first group, mastectomy including flap and axillary dissection was done using electrocautery. In the second group, a harmonic scalpel was used for dissection. This study compared the efficacy of the harmonic scalpel with electrocautery in terms of postoperative seroma formation and flap necrosis. Various other perioperative parameters like the number of drain days, total drainage volume (in mL), operating time (in minutes), intraoperative blood loss (in mL), and postoperative wound site pain were also studied. During each postoperative visit, the presence of seroma was assessed clinically, and the number of aspirations required for the seroma was also analysed. Results A total of 240 patients were randomized into two groups of 120 patients each. Baseline parameters were comparable across both groups. There were significant differences in the duration of surgery [151.38 mins vs. 112.33 mins; p = 0.001] and intraoperative blood loss [276.25 mL vs.200.13 mL; p = 0.001]. On Postoperative Day (POD) 1, the difference in the mean pain scores [6 vs. 4; p = 0.001] was statistically significant. In addition, the differences in the mean total drainage volume [937.5 mL vs. 470 mL; p = 0.002] and the incidence of seroma during the first follow-up [34.2% vs. 21.7 %; p = 0.030] were statistically significant. The difference in the incidence of flap necrosis on POD 4 [7.5% vs. 4.2%; p = 0.2706] was not statistically significant. None of the patients developed flap necrosis after four days. Conclusion The harmonic scalpel reduces the total drainage volume of seromas, the number of drain days, intraoperative blood loss, duration of surgery, postoperative pain (especially on POD 1 and 5), and incidence of flap necrosis.