Disclosed is a biocompatible, hemostatic, cross-linked gelatin composition comprising a biocompatible material comprising cross-linked gelatin and a sufficient amount of wetting agent to permit uniform wetting of the sponge in the presence of an aqueous solution. The lower redox potential electrochromic compounds makes a large contribution to the absorbancy of the electrochromic medium despite being present in only minor concentration. A ratio of each component of the emulsified composition can be obtained by accurately adjusting the amounts of raw materials such as milk, whole milk powders, butter, cheese, cream, condensed milk, butter oil, butter milk and butter milk powders serving as a milk fat source and a milk protein source; a disaccharide alcohol; an emulsifier; and moisture. The data transfers between a requesting device and solid-state storage function as cache for one or more HCNV storage devices, and the data transfers may include one or more of data, metadata, and metadata indexes. The retainer further includes one or more retention mechanisms that inhibit axial movement of the catheter relative to the retainer when the catheter is secured therein.