title: Anatomical Relationship Between the Kidney Collecting System and the Intrarenal Arteries in the Sheep: Contribution for a New Urological Model.
abstract: Previous studies have demonstrated that the pig collecting system heals after partial nephrectomy without closure. Recently, a study in sheep showed that partial nephrectomy without closure of the collecting system resulted in urinary leakage and urinoma. The aim of this study was to present detailed anatomical findings on the intrarenal anatomy of the sheep. Forty two kidneys were used to produce tridimensional endocasts of the collecting system together with the intrarenal arteries. A renal pelvis which displayed 11-19 (mean of 16) renal recesses was present. There were no calices present. The renal artery was singular in each kidney and gave two primary branches one to the dorsal surface and one to ventral surface. Dorsal and ventral branches of the renal artery were classified based on the relationship between their branching pattern and the collecting system as: type I (cranial and caudal segmental arteries), type II (cranial, middle and caudal segmental arteries) or type III (cranial, cranial middle, caudal middle, and caudal segmental arteries). Type I was the most common branching pattern for the dorsal and ventral branches of the renal artery. The arterial supply of the caudal pole of the sheep kidney supports its use as an experimental model due to the similarity to the human kidney. However, the lack of a retropelvic artery discourages the use of the cranial pole in experiments in which the arteries are an important aspect to be considered.
authors.affiliation: Urogenital Research Unity, State University of Rio De Janeiro, Rio De Janeiro, Brazil.
authors.forename: Gabriela Faria
authors.initials: GF
authors.lastname: Buys-Gonçalves
authors.affiliation: Urogenital Research Unity, State University of Rio De Janeiro, Rio De Janeiro, Brazil.
authors.forename: Diogo Benchimol
authors.initials: DB
authors.lastname: De Souza
authors.affiliation: Urogenital Research Unity, State University of Rio De Janeiro, Rio De Janeiro, Brazil.
authors.forename: Francisco José Barcellos
authors.initials: FJ
authors.lastname: Sampaio
authors.affiliation: Urogenital Research Unity, State University of Rio De Janeiro, Rio De Janeiro, Brazil.|Department of Morphology, Fluminense Federal University, Niterói, Rio De Janeiro, Brazil.
authors.forename: Marco Aurélio
authors.initials: MA
authors.lastname: Pereira-Sampaio
mesh_terms: D000818:Animals; D006801:Humans; D007668:Kidney / Q000033:anatomy & histology* / Q000098:blood supply; D007685:Kidney Tubules, Collecting / Q000033:anatomy & histology*; D008953:Models, Anatomic; D012077:Renal Artery / Q000033:anatomy & histology*; D012756:Sheep / Q000033:anatomy & histology*
keywords: anatomy; animal model; collecting system; intrarenal arteries; sheep kidney