Kraus B L, Kirker-Head C A, Kraus K H, Jakowski R M, Steckel R R
Department of Surgery, Tufts University, School of Veterinary Medicine, North Grafton, MA 01536, USA.
Vet Surg. 1995 Mar-Apr;24(2):102-11. doi: 10.1111/j.1532-950x.1995.tb01303.x.
The vascular and microvascular anatomy of the equine deep digital flexor tendon (DDFT) within the digital sheath was studied by injecting the vasculature with either colored latex or barium sulphate for radiographic, microangiographic, histologic, and computed tomographic (CT) evaluation. Consecutive 4-mm thick two-dimensional CT slice data were reconstructed to 3-dimensional volumetric images to enhance spatial evaluation of the blood supply. Gross dissection and angiographic studies identified three major vascular sources. Above the fetlock, the DDFT was supplied by either a branch of the medial palmar artery (Arteriae digitalis palmaris communis II) or a branch of the medial palmar digital artery (A. digitalis [palmaris propria III] medialis). Below the fetlock, the DDFT was supplied by branches from the lateral and medial palmar branches to the proximal phalanx (Ramus palmaris phalangis proximalis). The most distal aspect of the tendon received small branches from the medial and lateral palmar digital arteries. Using histology and microangigraphy we observed an extensive and uniform intratendinous vascular network above and below the fetlock, with a relatively avascular region of tendon palmar to the fetlock. The most distal 2.0 to 2.5 cm of the tendon within the sheath was heavily infiltrated with fibrocartilage along its dorsal aspect.
通过向血管内注射彩色乳胶或硫酸钡，对马指深屈肌腱（DDFT）在腱鞘内的血管和微血管解剖结构进行研究，以进行放射学、微血管造影、组织学和计算机断层扫描（CT）评估。将连续的4毫米厚二维CT切片数据重建为三维容积图像，以增强对血供的空间评估。大体解剖和血管造影研究确定了三个主要血管来源。在球节上方，DDFT由掌内侧动脉（指总掌侧动脉II）的一个分支或掌内侧指动脉（指掌侧固有动脉III内侧）的一个分支供血。在球节下方，DDFT由掌侧外侧和内侧分支至近节指骨（掌侧指骨近端支）的分支供血。肌腱的最远端部分接受来自掌内侧和外侧指动脉的小分支。通过组织学和微血管造影，我们观察到在球节上方和下方有广泛且均匀的腱内血管网络，球节掌侧的肌腱有一个相对无血管的区域。腱鞘内肌腱最远端2.0至2.5厘米沿其背侧被纤维软骨大量浸润。
