Common indications for thyroid surgery include multinodular goiter, single thyroid nodules, and thyroid cancer, making it one of the most common endocrine surgical procedures performed globally. Thyroidectomy is a common procedure, but it demands precise surgical skill because the gland is very vascular and is in close proximity to other important structures including the parathyroid glands and the recurrent laryngeal nerve [1, 2]. Reducing intraoperative blood loss, maintaining a clear surgical field, and preventing postoperative problems are all dependent on effective hemostasis during thyroid surgery [3].

The classic clamp-and-tie technique, in conjunction with electrocautery, has long been used to accomplish hemostasis during thyroid surgery. While these methods do the job, they aren't always quick and could cause more heat damage to nearby buildings. Postoperative discomfort, drainage, and length of hospital stay can all be worsened by taking too long to complete the procedure and manipulating tissues too roughly [4, 5].

Modern surgical techniques have been radically altered by the advent of sophisticated energy gadgets. One ultrasonic surgical tool that can cut and coagulate tissues at the same time is the harmonic scalpel, which uses mechanical vibrations at high frequencies. Reducing smoke production, allowing for precise dissection, and producing minimum lateral heat dispersion are all advantages over electrocautery. These characteristics make it an ideal choice for thyroid surgery, a procedure that places a premium on protecting sensitive tissues [6, 7].

Using a harmonic scalpel during a thyroidectomy has been shown in multiple studies to shorten the operation, decrease intraoperative blood loss, and alleviate postoperative drainage. Meanwhile, the risk of complications like hypocalcemia and recurrent laryngeal nerve injury remains similar. Further evaluation is necessary, nevertheless, due to variances in outcomes across various therapeutic contexts [8, 9].

This study aimed to compare harmonic scalpel with conventional surgical techniques in thyroidectomy at a tertiary referral center. The advantages of harmonic scalpel were evaluated in terms of operative time, blood loss, postoperative recovery, and complications.

This prospective comparison study was performed in the Department of General Surgery at a tertiary referral center for a duration of June 2022 to May 2023. A total of 50 patients receiving thyroid surgery for diverse benign and malignant thyroid diseases were included following the acquisition of informed written consent. The patients were randomly assigned to two groups: Group A (n = 25): Thyroidectomy conducted with the harmonic scalpel. Group B (n = 25): Thyroidectomy executed utilizing traditional methodologies. Inclusion Criteria: • Patients aged ≥18 years undergoing thyroid surgery • Patients diagnosed with benign or malignant thyroid disorders requiring surgical intervention • Patients willing to participate and provide written informed consent Exclusion Criteria: • Patients with previous thyroid surgery (reoperative cases) • Patients with coagulopathy or bleeding disorders • Patients with severe systemic illness unfit for surgery • Patients unwilling to participate in the study • Pregnant patients Statistical Analysis: Data were inputted into Microsoft Excel and evaluated with statistical tools. Continuous variables were represented as mean ± standard deviation (SD), whilst categorical variables were displayed as frequencies and percentages. Comparisons between the two groups were conducted utilizing the Student’s t-test for continuous variables and the Chi-square test or Fisher’s exact test for categorical variables. A p-value less than 0.05 was deemed statistically significant.

Group A (Harmonic Scalpel, n = 25) and Group B (Conventional Technique, n = 25) were the two groups into which 50 patients undergoing thyroid surgery were split. The two groups were compared on a number of postoperative and intraoperative characteristics.

Table 1: Demographic Profile of Patients

The gender and age distributions of the two groups were similar. Since thyroid issues are more common in women, it is not surprising that the majority of patients in both categories were female. There was no discernible variation between the categories (p > 0.05).

Table 2: Operative Time Comparison

In comparison to the conventional group, the harmonic scalpel group had a substantially shorter mean operating time. This proves that harmonic scalpels are more effective during surgery.

Table 3: Intraoperative Blood Loss

Significantly reduced intraoperative blood loss was seen in the harmonic scalpel group compared to the conventional group, indicating greater hemostatic control.

Table 4: Postoperative Outcomes

The harmonic scalpel group showed markedly better postoperative recovery metrics. Faster recovery and improved patient comfort were indicated by shorter hospital stays, less postoperative discomfort, and lower drain output.

Table 5: Postoperative Complications

There was no statistically significant difference in the occurrence of postoperative complications between the two groups. This provides more evidence that using a harmonic scalpel during thyroid surgery is just as safe as using more traditional methods.

The highly vascular thyroid gland and its close proximity to important structures like the parathyroid glands and the recurrent laryngeal nerve (RLN) make thyroidectomy a frequently performed surgical operation that demands careful dissection and efficient hemostasis [10]. The harmonic scalpel is one example of an innovative energy technology that has revolutionized surgery by allowing for coagulation and cutting to occur simultaneously with very little heat spread. Fifty patients having thyroid surgery were compared to traditional methods and the benefits of harmonic scalpel were found [11, 12].

Both groups had similar age distributions and gender distributions, with female patients making up the majority. This finding is in line with the fact that thyroid diseases are more common in women. Because of this comparability, we know that variations in surgical technique, and not in demographics, are responsible for the observed discrepancies in results [13-15].

The study's most noteworthy finding was the statistically significant decrease in operating time (75 ± 10 minutes) in the harmonic scalpel group as compared to the conventional group (105 ± 15 minutes) (p < 0.001). The harmonic scalpel's capacity to coagulate and dissect tissues at the same time is responsible for this decrease, since it does away with the necessity for frequent ligation and instrument changes. Consistent with these results, earlier research has shown that ultrasonic devices can significantly reduce operating times [16-18].

In contrast to the conventional group's intraoperative blood loss of 90 ± 20 mL, the harmonic scalpel group experienced a considerably lesser amount of blood loss of 50 ± 15 mL. The harmonic scalpel's better hemostatic capability is brought to light by this, which helps to create a more visible surgical field and makes dissection safer. Minimal bleeding can obfuscate important anatomical features during thyroid surgery, hence minimizing blood loss is of utmost importance [19, 20].

Additional evidence of the harmonic scalpel's benefits was found in postoperative recovery measures. There was a statistically significant decrease in drain output, postoperative pain levels, and hospital stay time in the harmonic group. There was less tissue manipulation and less lateral thermal injury, which may explain why the postoperative discomfort was less severe (VAS score 3.2 vs. 5.1) [21]. Better intraoperative hemostasis and less tissue damage are also indicated by decreased drain output. The speedier recovery and significant implications for patient satisfaction and healthcare expense savings are shown by the shorter hospital stay (3.5 ± 1 days vs 5 ± 1.2 days), which also suggests a shorter time in the hospital overall [22, 23].

Both groups demonstrated similar outcomes in relation to postoperative complications. There was no statistically significant difference in the rates of RLN injury or hypocalcemia between the two groups, suggesting that the harmonic scalpel can be safely used instead of more traditional procedures. Ultrasonic energy's small thermal dispersion probably helps nearby important buildings stay intact. This confirms what other research has shown: that using a harmonic scalpel does not significantly raise the risk of complications [24, 25].

There are substantial therapeutic benefits to using the harmonic scalpel instead of more traditional methods in thyroid surgery, as shown in the current study. Surgical efficiency and visualization of the operating field were both enhanced by the corresponding decreases in operating time and intraoperative blood loss. In addition, the postoperative outcomes for patients in the harmonic scalpel group were better. They had less drainage volume, lower pain levels, and a shorter hospital stay, all of which indicate that the patients recovered faster and were more comfortable. Crucially, both groups had similar rates of postoperative sequelae such hypocalcemia and recurrent laryngeal nerve damage, proving that the harmonic scalpel is a safe and effective substitute for conventional procedures.

1. Miccoli P, Berti P, Raffaelli M, Materazzi G, Baldacci S, Rossi G. Comparison between harmonic scalpel and conventional technique in thyroid surgery. Ann Surg. 2006;243(4):515–9.
2. Ortega J, Sala C, Flor B, Lledo S. Efficacy and cost-effectiveness of the ultrasonic dissector in thyroid surgery. Eur J Surg. 2004;170(5):321–5.
3. Voutilainen PE, Haglund CH. Ultrasonically activated shears in thyroidectomy. Ann Surg. 2000;231(3):322–8.
4. Siperstein AE, Berber E, Morkoyun E. The use of harmonic scalpel vs conventional knot tying in thyroid surgery. Arch Surg. 2002;137(2):137–42.
5. Defechereux T, Rinken F, Maweja S, Hamoir E, Meurisse M. Evaluation of harmonic scalpel in thyroid surgery. World J Surg. 2003;27(6):671–5.
6. Shemen L. Thyroidectomy using the harmonic scalpel: Analysis of 105 cases. Otolaryngol Head Neck Surg. 2002;127(4):284–8.
7. Kilic M, Keskek M, Ertan T, Yoldas O, Bilgin A, Koc M. Comparison of ultrasonic dissector and conventional methods in thyroid surgery. Int Surg. 2007;92(4):221–5.
8. Yener O, Demir M, Yilmaz A, Yildirim A, Yilmaz KB. Harmonic scalpel compared with conventional technique in thyroid surgery. Int J Surg. 2014;12(10):984–8.
9. Ferri E, Armato E, Spinato G, Spinato R. Focus harmonic scalpel in thyroid surgery. Acta Otorhinolaryngol Ital. 2011;31(2):80–4.
10. Docimo G, Tolone S, Pasquali D, Conzo G, Santini L. Harmonic scalpel in thyroid surgery: Prospective randomized study. BMC Surg. 2012;12(Suppl 1):S2.
11. Kirdak T, Korun N, Ozguc H. Use of harmonic scalpel in thyroidectomy. Int Surg. 2005;90(5):243–7.
12. Lombardi CP, Raffaelli M, De Crea C, Traini E, Oragano L, Sollazzi L, et al. Video-assisted thyroidectomy using harmonic scalpel. Surg Endosc. 2008;22(3):795–9.
13. Dionigi G, Boni L, Rovera F, Rausei S, Dionigi R. Harmonic scalpel in thyroid surgery: Review. Surg Technol Int. 2009;18:33–8.
14. Cheng H, Soleas IM, Ferko NC, Cameron CG, Clymer JW. Meta-analysis of harmonic scalpel vs conventional techniques. J Otolaryngol Head Neck Surg. 2015;44:55.
15. Garas G, Okabayashi K, Ashrafian H, Shetty K, Palazzo F, Tolley N, et al. Which hemostatic device in thyroid surgery? Meta-analysis. Langenbecks Arch Surg. 2013;398(4):509–25.
16. Lang BH, Yih PC, Lo CY. Prospective randomized trial of harmonic scalpel vs conventional thyroidectomy. Ann Surg Oncol. 2010;17(7):1914–20.
17. Ecker T, Carvalho AL, Choe JH, Walosek G, Preuss KJ. Harmonic scalpel in thyroid surgery reduces operative time. World J Surg. 2010;34(2):281–5.
18. Mourad M, Rulli F, Robert A, Scholtes JL, De Meyer M, De Pauw L. Prospective randomized study of ultrasonic scalpel. World J Surg. 2001;25(7):835–9.
19. Yao HS, Wang Q, Wang WJ, Ruan CP. Prospective clinical trial of harmonic scalpel. Chin Med J. 2008;121(24):2467–71.
20. Kiriakopoulos A, Tsakayannis D, Linos D. Use of harmonic scalpel in thyroid surgery. Am J Surg. 2004;187(5):588–91.
21. Cirocchi R, Arezzo A, D’Andrea V, Abraha I, Popivanov G, Randolph J, et al. Meta-analysis of harmonic scalpel vs conventional hemostasis. Surg Oncol. 2019;28:11–20.
22. Ruggiero R, Docimo G, Gubitosi A, Agresti M, Conzo G, et al. Harmonic scalpel vs conventional technique in thyroidectomy. BMC Surg. 2014;14:10.
23. Landman J, Kerbl K, Rehman J, Andreoni C, Humphrey PA, Collyer WC, et al. Evaluation of ultrasonic energy devices. J Urol. 2003;169(6):2213–6.
24. Melck AL, Wiseman SM. Harmonic scalpel in thyroid surgery: Evidence-based review. Curr Opin Otolaryngol Head Neck Surg. 2010;18(2):86–90.
25. Perigli G, Cortesini C, Qirici E, Boni D, Cianchi F. Clinical benefits of harmonic scalpel in thyroidectomy. Updates Surg. 2010;62(3–4):211–5.