Figure 5.

Plasma kallikrein activity in wound exudates of healing and non-healing human wounds. Plasma kallikrein activity was quantified in wound exudates obtained from normally healing wounds collected during the early (days 1–4 after injury) or late (days 8–25 after injury) phase of healing and from non-healing wounds as well as in blood serum of wounded patients; each dot represents plasma kallikrein activity in wound exudate or serum obtained from a different patient. Early healing versus blood serum, *P < 0.04; non-healing versus blood serum, *P < 0.05; early phase healing versus late phase healing, *P < 0.001; non-healing versus late phase healing, *P < 0.002.