Producing sterile surgical slush using complex rotational motion

A method for making surgical slush;

• the method comprising:
• placing an amount of fluid within a receptacle with a bottom wall and a cylindrical vertical wall;
• the fluid comprising water and salt;
• the amount of fluid placed into the receptacle being insufficient to cover all of the cylindrical vertical wall;
• reversibly attaching the receptacle to a platform;
• rotating the platform around a first axis that runs perpendicular through the platform while
• rotating the platform around an orbital axis parallel to the first axis to impose a complex motion upon the fluid within the receptacle as there is rotation around the first axis during rotation around the orbital axis;
• and
• the complex motion occurring while at least a portion of the cylindrical vertical wall is exposed to air cooled below a freezing temperature for the fluid contained in the receptacle to cool the fluid to form a surgical slush.