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  • Title: Eelectron microscopic examination of the rabbit oviductal ampulla following microsurgical end-to-end anastomosis.
    Author: Patton DL, Halbert SA.
    Journal: Fertil Steril; 1979 Dec; 32(6):691-6. PubMed ID: 510571.
    Abstract:
    The endosalpinx of both normal and microsurgically reconstructed ampullae in rabbit oviducts was examined by scanning and transmission electron microscopy following ovum transport studies. Tall, longitudinal mucusal folds ran continuously throughout the lumina of normal ampullae and were clearly interrupted at the incision site in the reconstructed oviducts. In both normal and surgically repaired tubes the endosalpinx was covered with long, slender cilia and bulbous processes of secretory cells with microvillous surfaces. Intracellular examination of these epithelial cells suggested no abnormal structure or function. These observations indicate that the epithelium on the severed ends of the endosalpinx healed completely within 1 month following ampullary anastomosis. Since no luminal obstruction was observed, the interruption and misalignment of the mucosal folds appear to be the cause of the impaired ciliary transport of cumulus masses observed in these oviducts. When species differences in tubal structure and function are considered, it appears likely that ampullary-ampullary anastomosis could hinder egg transport and fertility in women. Scanning and transmission electron microscopy were used to study the endosalpinx of both normal and microsurgically reconstructed ampullae in rabbit oviducts; the ampullae examined had been used in ovum transport studies. The lumina of normal ampullae showed tall longitudinal mucosal folds which ran continuously throughout the organ; these mucosal folds were clearly interrupted at the site of incision in reconstructed specimens. In both normal and surgically repaired tubes, long slender cilia and bulbous processes of secretory cells with microvillous surfaces covered the endosalpinx. These epithelial cells showed no abnormal structure or function upon intracellular examination. Therefore, it seems that the epithelium on the severed ends of the endosalpinx healed completely within 1 month of ampullary reanastomosis. The interruption and resulting misalignment of the mucosal folds seem responsible for the impaired ciliary transport of cumulus masses through oviducts since no luminal obstruction was observed. Though these experiments were performed in rabbit oviducts, it seems likely that ampullary-ampullary anastomosis in women could hinder ovum transport and fertility.
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