Oui Heejin, Oh Juyeon, Keh Seoyeon, Lee Gahyun, Jeon Sunghoon, Kim Hyunwook, Yoon Junghee, Choi Jihye
College of Veterinary Medicine, Chonnam National University, Gwangju, 500-757.
Vet Radiol Ultrasound. 2015 May-Jun;56(3):251-6. doi: 10.1111/vru.12234. Epub 2014 Dec 28.
This study reassessed the previously reported radiographic method of comparing pulmonary vessels versus rib diameter for differentiating healthy dogs and dogs with mitral regurgitation. The width of the right cranial pulmonary artery and vein at the fourth rib level, right caudal pulmonary artery and vein at the ninth rib level, and the diameters of the fourth rib and ninth rib were measured in prospectively recruited healthy dogs (n = 40) and retrospectively recruited dogs with mitral regurgitation (n = 58). In healthy dogs, the pulmonary arteries and accompanying veins were similar in size. The cranial lobar vessels were smaller than the fourth rib. However, 67.5% of right caudal pulmonary artery diameters and 65% of vein diameters were larger than the ninth rib in healthy dogs. The right caudal pulmonary vein diameter in dogs with mitral regurgitation, particularly those within moderate and severe grades, was significantly larger than that in healthy dogs (P < 0.001). The comparative method used to detect enlargement of the right caudal pulmonary vein relative to the accompanying pulmonary artery had the highest sensitivity (80.2%) and specificity (82.5%) for predicting mitral regurgitation. A cut-off of 1.22 when applying the ninth rib criterion had better specificity (73%) than the most used value ≤ 1 (89.7% sensitivity and 63.8% specificity), although it has less sensitivity (73%). We recommend using the accompanying pulmonary artery and 1.22 × the diameter of the ninth rib as a radiographic criterion for assessing the size of the right caudal pulmonary vein and differentiating healthy dogs from those with mitral regurgitation.
本研究重新评估了先前报道的通过比较肺血管与肋骨直径来区分健康犬和二尖瓣反流犬的影像学方法。在前瞻性招募的健康犬（n = 40）和回顾性招募的二尖瓣反流犬（n = 58）中，测量了第四肋骨水平的右头侧肺动脉和静脉、第九肋骨水平的右尾侧肺动脉和静脉以及第四肋骨和第九肋骨的直径。在健康犬中，肺动脉及其伴行静脉大小相似。头叶血管小于第四肋骨。然而，在健康犬中，67.5%的右尾侧肺动脉直径和65%的静脉直径大于第九肋骨。二尖瓣反流犬，尤其是中度和重度等级的犬，其右尾侧肺静脉直径显著大于健康犬（P < 0.001）。用于检测右尾侧肺静脉相对于伴行肺动脉增大的比较方法在预测二尖瓣反流方面具有最高的敏感性（80.2%）和特异性（82.5%）。应用第九肋骨标准时，截断值为1.22时的特异性（73%）优于最常用的值≤1（敏感性89.7%，特异性63.8%），尽管其敏感性较低（73%）。我们建议使用伴行肺动脉和1.22×第九肋骨直径作为影像学标准，以评估右尾侧肺静脉大小并区分健康犬和二尖瓣反流犬。
