Scrivani P V, Chew D J, Buffington C A, Kendall M, Léveillé R
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus 43210, USA.
J Am Vet Med Assoc. 1997 Sep 15;211(6):741-8.
To describe results of retrograde urethrography in cats with idiopathic, nonobstructive lower urinary tract disease (LUTD), to review the normal anatomy of the feline urethra, and to relate anatomy observed radiographically to the pathogenesis and diagnosis of LUTD in cats.
Retrospective case series and anatomic study.
53 cats with signs of nonobstructive LUTD for which an underlying cause could not be determined. Results for these cats were compared with those for 6 healthy female cats undergoing urethrocystoscopy for another study and 6 male cats without a history of LUTD undergoing necropsy examination.
Medical records, results of positive-contrast retrograde urethrography (cats with idiopathic, nonobstructive LUTD) and urethrocystoscopy (healthy female cats), and necropsy findings (healthy male cats) were reviewed.
Abnormalities were not detected during urethrocystoscopy, dissection, or urethrography. Previously, the urethra in male cats has been described simply as a long tube that tapers caudally, and the only structures consistently differentiated by radiography have been pelvic and penile parts. In this study, the seminal colliculus, isthmus of the urethra, preprostatic part of the urethra, and urethral crest were consistently observed in male cats in addition to pelvic and penile parts. The urethral crest also was observed in the comparatively simple female urethra.
During retrograde urethrography in cats, prior distention of the bladder with positive-contrast medium may obscure radiographic signs associated with normal anatomic structures. Knowledge of urethral anatomy and radiographic signs associated with idiopathic, nonobstructive LUTD in cats should improve understanding of the pathogenesis and diagnosis of this disease.
描述特发性、非梗阻性下尿路疾病（LUTD）猫的逆行尿道造影结果，回顾猫尿道的正常解剖结构，并将影像学观察到的解剖结构与猫LUTD的发病机制和诊断相关联。
回顾性病例系列研究和解剖学研究。
53只出现非梗阻性LUTD体征且无法确定潜在病因的猫。将这些猫的结果与另外6只因另一项研究接受尿道膀胱镜检查的健康母猫以及6只无LUTD病史的公猫尸检结果进行比较。
回顾病历、阳性造影剂逆行尿道造影结果（特发性、非梗阻性LUTD猫）、尿道膀胱镜检查结果（健康母猫）以及尸检结果（健康公猫）。
在尿道膀胱镜检查、解剖或尿道造影过程中均未检测到异常。此前，公猫尿道仅被描述为一条向尾端逐渐变细的长管，影像学上唯一能持续区分的结构是盆腔部和阴茎部。在本研究中，除盆腔部和阴茎部外，在公猫中还始终观察到精阜、尿道峡部、尿道前列腺前部和尿道嵴。在相对简单的母猫尿道中也观察到了尿道嵴。
在猫的逆行尿道造影过程中，用阳性造影剂预先充盈膀胱可能会掩盖与正常解剖结构相关的影像学征象。了解猫特发性、非梗阻性LUTD的尿道解剖结构和影像学征象应有助于提高对该疾病发病机制和诊断的理解。
