Harmonic Scalpel versus Conventional Haemostasis in Neck Dissection: A Prospective Randomized Study

Table 2

Operative and postoperative data in harmonic scalpel (HS) and conventional hemostasis (CH) groups.

	HS group (𝑛=31)	CH group (𝑛=30)	𝑃 value
Operative time (mean ± SD), min
mRND	113.9±17.3	149.5±18.7	<0.001
SND	57.5±14.9	86.1±20.6	<0.001
Intraoperative blood loss, mL
mRND	149.2±26.8	201.9±34.2	<0.001
SND	61.7±20.1	97.9±31.5	<0.001
Total drainage fluid volume, mL
mRND	237.4±12.4	356.1±24.7	<0.001
SND	129.3±28.1	238.9±30.6	<0.001
Postoperative pain
VAS at 24 h
mRND	4.89±1.07	6.82±1.43	<0.001
SND	4.27±1.51	6.35±2.04	<0.001
VAS at 48 h
mRND	1.98±0.96	3.81±1.37	<0.001
SND	1.76±0.82	3.99±1.45	<0.001
VRS at 24 h
mRND	2.91±1.05	4.15±1.94	<0.001
SND	2.84±1.19	4.27±1.59	<0.001
VRS at 48 h
mRND	1.06±0.87	2.73±0.71	<0.001
SND	0.95±0.44	2.85±1.03	<0.001
Mean hospital stay, days
Wide excision	9.2±2.5	10.1±2.8	0.467 NS
Free-flap reconstruction	24.9±3.3	27.1±3.4	0.579 NS
Partial laryngectomy	25.1±2.9	28.0±2.7	0.418 NS
Total laryngectomy	16.7±2.1	17.4±3.0	0.799 NS
Shoulder syndrome
Pain score (VAS)
mRND	3.46±0.22	3.35±0.15	0.924 NS
SND	1.15±0.18	1.27±0.33	0.871 NS
Motion score (VAS)
mRND	2.14±0.51	2.21±0.47	0.916 NS
SND	1.18±0.44	1.06±0.12	0.949 NS