rectal cannula

例句：

1. 1. The patient was given a rectal cannula to help him relieve his constipation.
   患者被给予直肠导管以帮助他缓解便秘。
2. 2.During the procedure, the doctor inserted a rectal cannula into the patient's rectum.
   在手术过程中，医生将直肠导管插入患者的直肠。
3. 3.The patient needed to have a rectal cannula inserted to facilitate the removal of the tumor.
   患者需要插入直肠导管以便于取出肿瘤。