Assistance system, assistance method, assistance program, and recording medium having assistance program recorded thereon

An assistance system for assisting a doctor by proposing a shape of a catheter to be used for a surgery of a patient, the system comprising:

• a schedule information acquisition unit that acquires disease information on the surgery and a blood vessel information relating to a shape of a portion capable of applying a backup force to the catheter by coming into contact with the catheter in a blood vessel of the patient;
• a past information acquisition unit that acquires a shape of a catheter used for a past similar surgery having disease information coinciding with that of the surgery and having blood vessel information similar to that of the surgery;
• and
• a proposal unit that corrects the shape of the catheter used for the past similar surgery, based on a comparison result obtained by comparing the blood vessel information on the surgery with the blood vessel information on the past similar surgery, and that proposes the catheter having the corrected shape, as the catheter to be used for the surgery.