Bone marrow attracted our attention as a potentially beneficial material for the treatment of
wounds, because it contains multipotential progenitor cells and produces
growth factors. We impregnated autologous bone marrow cells on to a
collagen matrix that had been used for the treatment of chronic
wounds. The bone marrow-impregnated
collagen matrix was then as a
biomaterial scaffold for the treatment of
wounds. This study was designed with the aim of clinically evaluating the effects of bone marrow-impregnated
collagen matrix on wound healing of
venous ulcers. We applied the matrix in 15 patients with chronic
venous ulcers, and evaluated the transcutaneous
oxygen tension (TcPO(2)) and vascular density. The application of the matrix induced healthy granulation tissue. All patients were given a split-thickness skin graft on to the induced granulation tissue, and have remained free from complications for more than eight months since the treatment. The mean (SD) vascular density at the
ulcer base increased after the treatment (before 0.011 (0.006) mm(2)/mm(2), after 0.064 (0.036) mm(2)/mm(2), p < 0.001). The periwound TcPO(2) values tended to increase (before 17.1 (12.7) mmHg, after 30.6 (13.4) mmHg, p < 0.001). Our results have shown the efficacy of bone marrow-impregnated
collagen matrix for the treatment of intractable
venous ulcers.