Slunsky Pavel, Brunnberg Mathias, Lodersted Shenja, Brunnberg Leo
Small Animal Clinic, Faculty of Veterinary Medicine, Free University of Berlin, Berlin, Germany.
J Feline Med Surg. 2018 Jan;20(1):38-44. doi: 10.1177/1098612X17709645. Epub 2017 May 22.
Objectives The objective of this study was to quantify the changes in the diameter of the vertebral canal in the lumbosacral and sacrococcygeal column (L6-Co2) in cats in dorsal and ventral recumbency, simulating real body positioning during a perineal urethrostomy. Methods Twenty-one male feline cadavers were enrolled in the study. All feline cadavers were evaluated by CT. Examinations were performed with the cadaver in a neutral position and dorsal and ventral recumbency. Sagittal vertebral canal diameters (VCDs) were obtained by measuring the distance between the ventral and dorsal aspects of the vertebral canal in the middle of the intervertebral space. Results A comparison of the VCDs between L6 and L7, L7 and S1, S3 and Co1 and Co1 and Co2 in neutral position vs dorsal recumbency revealed a reduction of 0.27 mm (14.6%; P <0.001) between S3 and Co1 and 0.26 mm (18.1%; P <0.001) between Co1 and Co2. No differences were seen when comparing L6-L7 and L7-S1. The VCDs were decreased in all segments when comparing neutral with ventral recumbency. This study revealed a reduction of 0.13 mm between L6 and L7 (3.3%; P = 0.003), 0.14 mm between L7 and S1 (4.1%; P = 0.003), 0.61 mm between S3 and Co1 (32.5%; P <0.001) and 0.63 mm between Co1 and Co2 (44.1%; P <0.001). Comparison of the VCD between dorsal and ventral recumbency in L6-L7, L7-S1, S3-Co1 and Co1-Co2 revealed a decrease in the VCDs in ventral recumbency of 0.13 mm (3.3%; P <0.001), 0.12 mm (3.6%; P <0.001), 0.34 mm (21.0%; P <0.001) and 0.37 mm (31.7%; P <0.001), respectively. Conclusions and relevance The results provide evidence that, from an anatomical point of view, perineal urethrostomy performed in dorsal recumbency is superior to ventral recumbency, but further clinical studies to verify these findings are necessary.
目的 本研究的目的是量化猫在仰卧位和俯卧位时腰骶部及骶尾柱（L6-Co2）椎管直径的变化，模拟会阴尿道造口术期间的实际体位。方法 21只雄性猫尸体纳入本研究。所有猫尸体均通过CT进行评估。检查在尸体处于中立位、仰卧位和俯卧位时进行。矢状位椎管直径（VCD）通过测量椎间隙中部椎管腹侧和背侧之间的距离获得。结果 中立位与仰卧位相比，L6与L7、L7与S1、S3与Co1以及Co1与Co2之间的VCD比较显示，S3与Co1之间减少了0.27mm（14.6%；P<0.001），Co1与Co2之间减少了0.26mm（18.1%；P<0.001）。比较L6-L7和L7-S1时未见差异。中立位与俯卧位相比，所有节段的VCD均减小。本研究显示，L6与L7之间减少了0.13mm（3.3%；P = 0.003），L7与S1之间减少了0.14mm（4.1%；P = 0.003），S3与Co1之间减少了0.61mm（32.5%；P<0.001），Co1与Co2之间减少了0.63mm（44.1%；P<0.001）。L6-L7、L7-S1、S3-Co1和Co1-Co2仰卧位与俯卧位的VCD比较显示，仰卧位时VCD分别减少了0.13mm（3.3%；P<0.001）、0.12mm（3.6%；P<0.001）、0.34mm（21.0%；P<0.001）和0.37mm（31.7%；P<0.001）。结论及相关性 结果表明，从解剖学角度来看，仰卧位进行会阴尿道造口术优于俯卧位，但需要进一步的临床研究来验证这些发现。
