Methods, compositions, and treatment protocols for treating ischemic wounds and inflammatory conditions in a patient. The treatment protocols comprise or consist of using a modified collagen gel (MCG) to promote healing of ischemic wounds and reduce inflammation at the wound site and in other inflammatory conditions. The modified collagen gel comprises generally a dispersion of collagens in an aqueous matrix comprising water and glycerine, where the amount of Type I collagen is greater than the amount of Type II and Type III collagens in the gel.