Comparison of fluid removal using the two dressings, measured after 1, 5 and 10 minutes during NPWT at −50 (A), −75 (B) and −125 mmHg (C), using 1000 ml albumin solution. The results are shown as means ± SEM of six experiments. Statistical analysis was performed using the Mann–Whitney test. Significance was defined as P < 0·05 (*) and P > 0·05 (not significant, n.s.).