Hasegawa K, Pereira B P, Pho R W
Department of Orthopaedic Surgery, The National University of Singapore, Lower Kent Ridge Road, Singapore S119074.
J Hand Surg Am. 2001 Mar;26(2):283-90. doi: 10.1053/jhsu.2001.21519.
The organization of the microvasculature of the dorsal human fingertip based on a vascular corrosion cast was examined using a stereoscopic microscope. The variations of the superficial capillary network of the 3 specialized areas of skin of the dorsal fingertip (the nail bed, the nail matrix, and the nail fold) are described. In the nail bed numerous capillary loops were observed arising from a deeper regular arrangement of sagittally aligned, parallel rows of vessels. The size and direction of inclination of the capillary loops varied, getting longer and more inclined to the nail bed distally, with the longest capillary loops seen at the hyponychium. There were no capillary loops at the nail matrix region, but there was a single, layered, rectangular plexus of capillaries in the plane of the nail matrix. This extended distally to sagittally stretched coils of vessels that straightened out as the nail matrix enters the nail bed region. At the edge of the proximal nail fold the capillary loops looked like fine bristles and were approximately 3 times shorter than those found on the nail bed and hyponychium. This study provides a baseline for future work in understanding the changes in the microvasculature of the dorsal fingertip due to injury or pathology.
使用体视显微镜检查了基于血管铸型的人类指尖背侧微血管结构。描述了指尖背侧3个特殊皮肤区域（甲床、甲母质和甲襞）表面毛细血管网络的变化。在甲床中，观察到许多毛细血管袢起源于更深层的、呈矢状排列的平行血管排的规则排列。毛细血管袢的大小和倾斜方向各不相同，向远端甲床方向变得更长且更倾斜，在甲下皮可见最长的毛细血管袢。甲母质区域没有毛细血管袢，但在甲母质平面有单层的矩形毛细血管丛。它向远端延伸至矢状伸展的血管盘绕，随着甲母质进入甲床区域，这些血管盘绕变直。在近端甲襞边缘，毛细血管袢看起来像细刷毛，比甲床和甲下皮的毛细血管袢短约3倍。本研究为未来理解指尖背侧微血管因损伤或病理变化提供了基线。
