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观察了90例新生儿直肠的动脉和神经分布。盆膈以下的肛管由肛门血管和神经供应,盆膈上方的肠管由直肠上、下动脉分布,但仅42.2%的例子存在直肠下动脉。直肠上动脉终支进入直肠壁的位置相当于3个主痔所在的线上,距肛门约为2cm。直肠壶腹两侧的下腹下丛的下端约距肛门2.5cm,它与肠壁之间隔有直肠筋膜,如沿筋膜内面游离直肠,可避免损伤此丛。
The rectal arteries and nerves were observed in 90 neonates. The anal canal below the pelvic floor is supplied by the anal vasculature and nerves. The bowel above the pelvic floor is distributed by the superior and inferior rectal arteries, but only 42.2% of the cases present with the inferior rectal artery. The location of the distal rectal artery into the rectal wall corresponds to the line of the three main hemorrhoids, about 2cm from the anus. Lower extremity under the ampulla on both sides of the rectum ampulla between the anus 2.5cm from the anus, it is separated from the wall with a rectal fascia, such as the internal rectum along the fascia to avoid damage to the plexus.