Medical system

A medical system comprising:

• a device for removing an object in a body cavity, the device including:
• a shaft portion including a rotatable drive shaft,
• a motor configured to rotate the drive shaft, and
• a cutter attached to a distal end of the drive shaft and configured to perform a cutting operation on the object when the drive shaft is rotated by the motor;
• one or more sensors each configured to detect a physical quantity related to the cutting operation;
• and
• a controller configured to:
• determine one or more cutting parameters for the cutting operation based on the physical quantity detected by each of the one or more sensors, and
• control the motor to rotate the drive shaft according to the determined one or more cutting parameters, wherein
• one of the one or more sensors is configured to detect sound produced by the cutter or the motor,
• the controller is configured to determine the one or more cutting parameters based on the detected sound,
• the controller is configured to perform a machine learning algorithm to obtain a function suitable for determining the one or more cutting parameters from the physical quantity, the algorithm including:
• (a) determining first cutting parameters based on a first physical quantity using the function,
• (b) calculating a score for the first cutting parameters based on a second physical quantity that is detected after the cutting operation is performed according to the first cutting parameters, and
• (c) updating the function based on the calculated score, and
• the controller repeats steps (a)-(c) until the calculated score reaches a particular score.