[Did Seikyo Sugita Perform Two Surgical Operations under Ether Anesthesia in 1855?]

Although Seikyou Sugita is said to have provided ether anesthesia for two surgical oprations in 1855 including the scur resection of burned fingers of a man and the resection of a breast cancer of a woman. The details of his administration of the drug were not known because he did not describe these cases at all. According to Treatise on Inhalation of Ether written in 1863 by Shinryo Tsuboi, Sugita failed to provide successful general anesthesia using ether for these patients. The ether he used was prepared by Ryuho Shima, and the failures were likely to be due to impure nature of the agent.