Screen changing device, and system and method of reducing the size of living tissue in using the same

A screen changing device comprising:

• a first housing comprising
• a first base,
• an outer wall connected to the first base,
• an inner wall connected to the first base and being opposite to the outer wall,
• a first space defined between the outer wall and the inner wall,
• a second space defined by the inner wall,
• a first connector disposed on the outer wall, and
• a second connector disposed on the inner wall and in the second space;
• a second housing comprising
• a second base,
• a supporting wall connected to the second base and disposed in the first space, and
• a plurality of recesses arranged in a circumferential direction of the supporting wall;
• and
• a plurality of screens disposed in the plurality of recesses, respectively, and configured to reduce a size of a living tissue,
• a body cap disposed between the inner wall and the second base,
• wherein the second housing is configured to be rotated with respect to the first housing from a first configuration, in the first configuration, a first screen of the plurality of screens is aligned with the first connector and the second connector to a second configuration, in the second configuration, the first screen is not aligned with the first connector and the second connector and a second screen of the plurality of screens is aligned with the first connector and the second connector.