Tissue pad degradation of ultrasonic device may enhance thermal injury and impair its sealing performance in liver surgery

Table 1 Tissue pad degradation of H-HD1000i and H-1100 after 300 repeated activations

	H-HD1000i	H-1100
1st experiment (mm)	0.59	0.06
2nd experiment (mm)	0.42	0.09
Mean (mm)	0.51	0.08

Table 2 Vessel sealing performance after 300 repeated activations. Values are presented as median (range) or n (%)

	H-HD1000i	H-1100	P value
Vessel sealing spead (sec.)	5.1 (3.9-5.9)	4.9 (3.2-5.2)	0.21
Vessel burst pressure < 700 mmHg	4 (40)	0 (0)	0.09