Ureteral Regeneration Following Experimental Segmental Resection

Histological and Urographic Findings in the Autotransplanted Ureter without Kidney in Dogs: Preliminary Report

“…The bone metaplasia found, which is attributable to microtrauma tism and ischemia, was already observed by several au Devine et al [4] used the ureter as an allogenic and autologous free graft without encouraging results. Of the 7 autologous grafts, 3 sloughed with necrosis and 4 were contracted with fibrosis, bone metaplasia and absence of thors when studying ureteral regeneration [20] or autolo gous ureter free graft in dogs [4], The peristalsis observed in our series may be attributed to the existence of a multilocated system of pyelocaliceal pacemaker [16], or to the passage of waves through the suture. The latter has been demonstrated in dogs 23-28 days after the operation [19,22],…”

Restoration of the continuity of dog ureter after resection of its 5 cm middle segment

“…Pre-operatively, blood analysis, a plain abdominal X-ray catheter and this work was followed by other studies, some undertaken after longitudinal incision of the and intravenous urography were carried out; they were repeated post-operatively and supplemented by ureter-ureter [1][2][3][4][5][6][7][8][9][10][11][12], or after partial excision of its wall with the formation of a window [11,13], as well as after opyelography. Laparotomy was undertaken through a full-length the resection of a short segment [1,2,[14][15][16][17]. Ureteric mucosa regenerated within 7-14 days [1,2,4,9-midline abdominal incision and a 5 cm long section of ureter was removed from the middle.…”

“…Huffman Unlike 'regeneration', i.e. the restitution of the primary structure and function of an altered organ, the term et al [16] observed no regeneration of the muscular coat after excision of a segment of ureter. Other investigators 'repair' refers to replacement of the damaged or destroyed part of an organ by a scar of connective tissue.…”

Smooth muscle cell regeneration in repair of gastric anastomosis in the dog

“…A large number of experi-mental studies supports the fact that, in mammals, defects of the smooth muscle tissue are repaired chiefly by fibrous connective tissue proliferation (McMinn, 1954(McMinn, , 1969Healey et al, 1961;Huffman et al, 1956;Schwarz et al, 1938;Siegel, 1952). There is some evidence, however, of a regeneration of smooth muscle cells --mainly in the uterine wall (Hooker, 1941 ;Hess, 1953 ;Greenhill, 1960), as well as in the blood vessels (Crawford, 1956;Buck, 1961;Jurukova and Rohr, 1968;Jurukova and Knieriem, 1970;Hassler, 1970), the ureters (Oppenheimer and Hinman, 1955;Weaver and Henderson, 1954;Hinman et al, 1963) and in the gastro-intestinal tract (Jones, 1957;Herman et al, 1964;Zetterlund, 1967).…”