Parry B W, McCarthy M A, Anderson G A, Gay C C
Am J Vet Res. 1982 Jan;43(1):50-4.
The influence of occlusive bladder width on blood pressure, measured indirectly using a doppler ultrasound technique at the middle coccygeal artery, was studied in 6 anesthetized horses. The relationship was investigated on tails with and without hair, and the optimum bladder width (BW)/tail girth (TG) ratio was determined for systolic pressure (SP) and diastolic pressure (DP), with the data grouped as unclipped tails (TT-1), clipped tails (TT-2), and both unclipped and clipped tails collectively (TTB). The optimum BW/TG ratios for SP and DP were 0.296 and 0.866 for TT-1, 0.376 and 1.156 for TT-2, and 0.339 and 0.983 for TTB, respectively. Despite the differences in optimal BW/TG ratios between TT-1 and TT-2, their regression equations were not significantly (P less than 0.05) different and therefore, data could be considered as TTB. The regression equations for TTB showed that a BW/TG ratio of 0.482 underestimated SP and overestimated DP by approximately 8.8%. In mature Thoroughbreds (mean TG 21.5 cm), this value corresponded to a BW of 10.4 cm. Blood pressure measured directly in the greater metatarsal artery was significantly different from that measured directly in the middle coccygeal artery in individual horses, but when averaged over all horses, there was no significant difference between the 2 sites.
在6匹麻醉的马身上，研究了使用多普勒超声技术在尾中动脉间接测量的闭塞气囊宽度对血压的影响。研究了有毛和无毛尾巴的这种关系，并确定了收缩压（SP）和舒张压（DP）的最佳气囊宽度（BW）/尾围（TG）比值，数据分为未剪毛尾巴（TT - 1）、剪毛尾巴（TT - 2）以及未剪毛和剪毛尾巴合并（TTB）。TT - 1的SP和DP的最佳BW/TG比值分别为0.296和0.866，TT - 2为0.376和1.156，TTB为0.339和0.983。尽管TT - 1和TT - 2的最佳BW/TG比值存在差异，但它们的回归方程无显著差异（P小于0.05），因此，数据可视为TTB。TTB的回归方程表明，BW/TG比值为0.482时，低估SP约8.8%，高估DP约8.8%。在成年纯种马（平均TG 21.5厘米）中，该值对应BW为10.4厘米。在个体马匹中，在大跖骨动脉直接测量的血压与在尾中动脉直接测量的血压有显著差异，但对所有马匹进行平均时，两个部位之间无显著差异。
