Patent ID: 8354064

Claim:
An apparatus for producing liposomes, comprising: a particle diameter regulating unit for regulating the particle diameter of liposomes by membrane emulsification or shear force emulsification, the particle diameter regulating unit having an inlet and an outlet; a supply flow channel to supply the particle diameter regulating unit with a solution under processing containing a liposome-forming lipid, the supply flow channel being formed integrally with the particle diameter regulating unit through the inlet; a discharge flow channel to discharge from the particle diameter regulating unit a liposome-containing solution under processing containing the liposomes, the discharge flow channel being formed integrally with the particle diameter regulating unit through the outlet; the supply flow channel having an input port through which the solution under processing containing the liposome-forming lipid is put into the supply flow channel; wherein the discharge flow channel has a first light-transmitting part at least a portion of which is made of material transparent to light, and also has at least a first light transmittance measuring unit which measures the light transmittance of the liposome-containing solution under processing by directing light to the first light-transmitting part from the outside of the first light-transmitting part; and the first light-transmitting part and the first light transmittance measuring unit obtaining the particle diameter of liposomes contained in the liposome-containing solution under processing by utilizing a preliminarily acquired correlation between the light transmittance and the particle diameter of liposomes which is applied to the measured light transmittance of the liposome-containing solution.