According to the reporter, during procedure a laparoscopic low anterior resection, the surgeon tighten purse-string around the anvil and inserted the instrument from the anal then tried to connect the anvil to trocar; however could not.The surgeon said that the orange band was covered; however, they did not hear the click sound and the anvil disengaged from the trocar easily.The procedure was completed with another device.Additional tissue resection was required due to the issue.The status of the patient was reported as no problem.
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