Robotic instruments outside the surgical field can cause problems: A case of critical bleeding during robotic distal pancreatectomy.

Robotic surgery has technical advantages including high optical magnification and articulation of forceps. However, the surgical field tends to be narrow due to the high magnification, and the forceps have no tactile sensation. A case of severe intraoperative bleeding from the splenic artery during robotic distal pancreatectomy is presented, with a video. A man in his 80s with a cystic tumor located at the pancreatic tail underwent robotic distal pancreatectomy. During mobilization of the pancreatic tail by an inferior approach, the root of the splenic artery was injured by the joints of the robotic instruments located outside the surgical field and the bleeding became uncontrollable under the robotic operation. It is important to always be aware of what the forceps are in contact with outside the surgical field. While dissecting the left subdiaphragmatic area in robotic distal pancreatectomy, the root area of splenic artery tends to be outside the surgical field. More attention should be paid to the positional relationship between the forceps trajectory and the major blood vessels by checking the surgical field from a distant view on a regular basis.

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