Abstract: A cannula guide device that can provide a secure and safe transfusion treatment is disclosed, comprising a cannula assembly and a needle assembly. The cannula assembly includes a cannula and a cannula holder, and the needle assembly includes a guide needle and a needle holder. The cannula guide device is characterized in that a rotary cannula arrangement is provided to steadily send the cannula relative to the guide needle toward a patient without generating a repulsive force on the needle holder to avoid pulling out the guide needle accidentally.

Abstract: A contact lens disinfecting composition in solid form for addition to water comprises a contact lens disinfecting agent which is a source of hydrogen peroxide when in water, such as sodium percarbonate; an inactivating agent in delayed-release form such as sodium thiosulphate; and a color change indicator.