Anatomical Transverse Helical CT Study of The Postprostate Part of The Rabbit Urethra

Background/Aim: The male urethra in domestic mammals is composed of pelvic and penile part. The pelvic part consists of preprostate and prostate part.The aim of the study was to present data for helical СТ visualization of the rabbit postprostate urethra. Material and Method: Ten mature clinically healthy male New Zealand white rabbits were studied. The animals were anesthetized. The bone landmarks at the helical СТ study were identified. The peroral and parenteral contrast agents were administered. A whole body multi-slice helical computed tomography scanner was used. Result and Conclusion: СТ scan of the pelvis in the transverse plane through the third, fourth sacral and first coccygeal vertebra, body of ischiadic and ischiadic symphysis visualized the following: urethral hypoattenuated lumen was dorsal to the pelvic symphysis; the urethral lumen’s shape was ovoid with regular contours and flattened dorsoventral; the urethral wall was relatively hyperattenuated, compared to the close soft tissues, except the rectal finding. The study creates a detail picture for the postprostate urethra that shows the method’s benefits.

Anahtar Kelimeler:

Anatomy, Helical CT, Rabbit, Urethra.

Tavşanda urethra’nın postprostatik bölümünün bilgisayarlı tomografik anatomisi

Özbilgi/Amaç: Erkek hayvanlarda urethra, pars pelvina ve pars penina olmak üzere iki bölümde incelenir. Pars pelvina ise pars preprostatica ve pars prostatica urethra olma üzere ikiye ayrılır. Bu çalışmanın amacı tavşanlarda postprostatik urethra’nın bilgisayarlı tomografik görüntülerinin sunulmasıdır. Materyal ve Metot: Bu çalışmada 10 adet sağlıklı erkek Yeni zellanda tavşanı kullanıldı. Hayvanlar anesteziye alındı. Tomografik görüntülerde kemik bölgeleri belirlendi. Oral ve parenteral yolla kontrast madde verildi. Çok kesitli helikal bilgisayarlı tomografi ile tüm vücut tarandı. Bulgular ve Sonuç: Pelvis bölgesinin üçüncü ve dördüncü sacral vertebra ve birinci caudal vertebra hizasından geçen transversal tomografik kesitlerinde, öncelikle corpus osssis ischii ve symphysis ischiadica belirlendi. Bunu takiben sypmhisis’in dorsalinde düşük yoğunlukta urethra lumeni belirlendi. Lumenin şekli, kenarları belirgin dorsoventral yönlü düzleşen ovoid olarak belirlendi, Urethra duvarı daha çevresindeki yumuşak dokulara göre daha yüksek yoğunlukta görülüyordu. Bu çalışmada kullanılan metot ile postprotatik urethra detaylı bir şekilde görüntülenebilmiştir..

Keywords:

Anatomi, Helikal BT, Tavşan, Urethra.,

PDF

___

Ali M, Safriel Y, Sclafani S and Schulze R (2003). CT Signs of Urethral Injury. RadioGraphics, 23, 951–966.
Baskin L, Erol A, Jegatheesan P, Li Y, Liu W and Cunha G (2001). Urethral seam formation and hypospadias. Cell and Tissue Research, 305, 379-387.
Braun U, Schnetzler C, Augsburger H, Bettschart R and Ohlerth S (2014). Computed tomography of the abdomen of calves during the fi rst 105 days of life: III. Urinary tract and adrenal glands. Schweiz Arch Tierheilkd, 156, 237-47.
Dimitrov R and Toneva Y (2006). Computed tomography imaging of the pelvic urethra in male cats. Trakia Journal of Sciences, 4, 14-17.
Dimitrov R, Toneva J, Stamatova K and Yonkova P (2009). Computed tomographic study on the pelvic urethra in the male rabbit. Uludag Univ J Fac Vet Med, 28, 9-14.
Dimitrov R (2013). Anatomical Imaging Analysis of the Prostate gland in Rabbit (Oryctolagus cuniculus) - Helical computed tomography study. Revue de Médecine Vétérinaire, 164, 245-251.
Doumanian L (2010). Evaluation and Treatment of Urethral Stricture Disease. Current Bladder Dysfunction Reports, 5, 198-204.
Hiorns M (2011). Imaging of the urinary tract: the role of CT and MRI. Pediatric Nephrology, 26, 59–68.
Kajbafzadeh A, Jangouk P and Ahmadi Yazdiр C (2005). Anterior urethral valve associated with posterior urethral valves. Journal of Pediatric Urology, 1, 433-435.
Kawashima A, Sandler C, Wasserman N, LeRoy A, King B and Goldman St (2004). Imaging of Urethral Disease: A Pictorial Review. RadioGraphics, 24, S195–216.
International Committee on Veeterinary Gros Anatomical Nomenclature (I C V G A N), General Assembly of the World Association of Veterinary Anatomists (W A V A) (2012). Nomina Anatomica Veterinaria. Fifth ed. Published by the Editorial Committee, U S A.
Rockall A and Vinnicombe S (2007): Section 3 The abdomen and pelvis. Chapter 6 The renal tract retroperitoneum and pelvis. In: Applied Radiological Anatomy for Medical Students. Cambridge University Press, Cambridge UK, pp.47-63.
Skaff M, Pinto E, Leite K and Almeida F (2012). Development of a rabbit’s urethral sphincter deficiency animal model for anatomical-functional evaluation. International Brazilian Journal of Urology, 38, 17-24.
Stamatova-Yovcheva K, Dimitrov R, Yonkova P, Russenov A, Yovchev D and Kostov D (2012). Comparative imaging study of domestic rabbit liver (Oryctolagus cuniculus). Trakia Journal of Sciences, 10, 57-63.
Stamatova-Yovcheva K, Dimitrov R, Toneva Y, Yonkova P, Kostov D, Rusenov A, Uzunova K and Yordanova V (2013). Helical computed tomography application in rabbit liver anatomy: comparison with frozen cross-sectional cuts. Turkish Journal of Veterinary and Animal Science, 37, 553-558.
Stolzenburg J, Neuhaus J, Liatsikos E, Schwalenberg T, Ludewig E and Ganzer R (2006). Histomorphology of canine urethral sphincter systems, including three-dimensional reconstruction and magnetic resonance imaging. Urology, 67, 624-630.
Uthamanthil R, Hachem R,Gagea M, Reitzel R, Borne A and Tinkey P (2013). Urinary Catheterization of Male Rabbits: A New Technique and a Review of Urogenital Anatomy. Journal of the American Association for Laboratory Animal Science, 52, 180–185.
Vásquez B and del Sol M (2002). Prostatic complex in the rabbit (Oryctolagus cuniculus). Revista chilena de anatomía, 20, 175-180.