Method for preparing an improved hemostatic agent and method of employing the same

A method comprising modifying one of the group consisting of collagen substance or a collagen-like substance to render the surface charge thereof effectively more positive, and applying the thusly modified substance to control bleeding, the substance being modified by covalent modification.

A method of preparing a hemostatic agent comprising modifying one of the groups consisting of collagen substance or a collagen-like substance by dissolving the substance in water and modifying the thusly dissolved substance to render the surface charge thereof effectively more positive than prior to modification, and freezing and drying the thusly modified substance.

A method of preparing a hemostatic agent comprising modifying one of the groups consisting of collagen substance or a collagen-like substance to render the surface charge thereof effectively more positive, the substance being modified by covalent modification.