Table 2.

Comparison of outcome variables between harmonic and electrocautery groups

Variable	Harmonic (n = 36)	Electrocautery (n = 36)	p
- Duration of surgery (hours)	2.63± 0.41	1.75 ± 0.26	0.0001 a
- Blood loss (ml)	69.4 ± 25.1	255.5 ±41.6	0.002 a
- Total drain volume (ml)	1277.8 ± 172.5	3300 ±167.5	0.002 a
- Duration of drains (days)	13.3 ± 1.13	17.9 ± 1.64	0.001 a
- Complications
Wound infection	2 (5.6%)	8 (22.2%)	0.569 b
Delayed Healing	2 (5.6%)	8 (22.2%)	0.569 b
Flap necrosis	0	5 (27.8%)	0.435 b
Hematoma	2 (5.6%)	7 (19.4%)	0.164 b
Re-accumulation of seroma after drain removal	3 (8.3%)	12 (33.3%)	0.003 b

^at test

^bχ² test