老人阑尾炎手术两年后,发现其腹内有约3厘米金属针一支,并经手术取出。医方则以金属针为普通缝衣针,并非手术所遗留而拒绝承担责任。在双方均无充分证据证明的情形下,该如何认定?[案情回放]两年前的一天晚上,56岁的耿阿姨因持续腹痛被家人送到某区人民医院。经检查确诊为“阑尾炎”。翌日上午医生给耿阿姨进行阑尾切除手术。术后第3天,耿 Two years after the operation of treating appendicitis in the elderly, one of the metal pins of about 3 cm in the abdomen was found and removed surgically. Medical is the metal needle as an ordinary sewing needle, not left by surgery and refuse to take responsibility. In the absence of sufficient evidence on both sides of the situation, how to identify? [Case] ​​two nights ago, one night two days ago, 56-year-old Geng Aunt due to persistent abdominal pain was sent by the family to a district People’s Hospital. After examination confirmed as “appendicitis ”. The next morning, the doctor gave Geng Aunt appendectomy. After 3 days, Geng