Figure 2

Epicardial petechial bleeding following NPWT at -120 mmHg after 12 and 24 hours, with and without a rigid barrier disc between the heart and the sternum. The area affected by petechial bleeding was measured. Results are presented as the mean of 8 values ± SEM. It can be seen that the area of epicardial bleeding was larger when NPWT had been performed without the rigid disc.