Abstract
Objective: To evaluate the effect of topical haemoglobin spray on treatment response and wound-closure rates in patients with chronic venous leg ulcers. Method: A linear regression model was used to forecast healing outcomes over a 12-month period.
Simulated data were taken from normal distributions based on post-hoc analysis of a 72-patient study in non-healing and worsening wounds (36 patients receiving standard care and 36 receiving standard care plus topical haemoglobin spray). Using a simulated 25,000 'patients' from each group, the proportion of wound closure over time was projected.
Results: Simulation results predicted a 55% wound closure rate at six months in the haemoglobin group, compared with 4% in the standard care group. Over a 12-month simulation period, a 43% overall reduction in wound burden was predicted.
With the haemoglobin spray, 85% of wounds were expected to heal in 12 months, compared with 13% in the standard care group. Conclusion: Topical haemoglobin spray promises a more effective treatment for chronic venous leg ulcers than standard care alone in wounds that are non-healing or worsening.
Further research is required to validate these predictions and to identify achievable outcomes in other chronic wound types.