大鼠主要皮动脉的形态计量学及其相互关系

Morphometry and their relationship of the main cutaneous arteries in rats

目的探讨大鼠主要皮动脉的形态计量学特征及其血流动力学特点。方法 SD大鼠12只,行一次性全身血管造影并配合利用Photoshop与Scion Image等电脑图像处理技术,分析不同类型皮动脉的供血范围、血管密度变化趋势及其供血趋向性等。结果 6个主要皮动脉的平均外径为(0.53±0.12)mm,其营养体区周长为(18.74±4.84)cm,平均血管密度为(391.31±76.58)灰度/(像素·厘米厚度);皮动脉外径与其营养体区周长呈正相关,其回归方程为:y=32.441x+1.233(r=0.851,n=54,P<0.01)。结论大鼠皮动脉外径和其营养区域的周长成正比,相同外径的皮动脉,其营养区域的周长相等,区域形状越接近于圆其面积越大。轴型血管营养皮瓣的平均血管密度高于分支型血管。

Objective To describe the morphometric and hemodynamic characteristics of main cutaneous arteries of rats. Methods The anatomy of cutaneous arteries was studied using a modified lead oxide-gelatin injection technique in 12 rats. Angiograms were assembled with Adobe Photoshop and analyzed with Scion Image Beta to determine the scope of blood supply, the trend in blood vessel density and blood supply. Results The main source vessels contributed a summed mean of 6 cutaneous arteries in the rat trunk, with a mean emerging vessel diameter of （0. 53 ±0. 12）mm,the perimeter of the skin that could potentially be supplied by the cutaneous artery averaged （18.74 ±4.84）cm, and its mean vascular density was （391.31 ±76.58） gray value/（ pixel· mm）. It was positive correlation between the diameter and its supplying perimeter, the linear regression was y = 32. 441x ＋ 1. 233 （ r = 0. 851, n = 54, P 〈 0.01 ）. Conclusion The diameter and the perimeter of its nutrient region is directly proportional. In the case of the same perimeter, nutritional distribution is more close to the regional round, the greater the area of nutrition. The mean vascular density of the skin flap supplied by axial artery is higher than the one supplied by branch-style artery.