After controlling for age and gender , the team found associations between a smaller ratio of retinal arterioles and venules with mri findings , including prevalent infarcts , worsening white matter grade , and incident infarct 在对年龄和性别进行控制后，研究小组在磁共振结果中发现较小比率视网膜小动脉和小静脉之间的联系，包括普遍的梗塞，恶化的白质程度，以及偶发的梗塞。
( 2 ) common integument tissue venous vessel network can be divided into five layers from superficial layer to deep layer : cutaneous papillary layer , hypopapillary layer , hypodermis layer , subdermal layer and deep fascia layer . the artery branch and arteriole that shallowed up from hypopapillar layer get to papillar layer to form vessel network , circuitous and twisted , reflux and anastomose to become postcapillary micro veins and endothelial venule , then anastomose each other and accompanied with artery to enter hypo 小静脉伴行动脉进入皮下组织层、深筋膜层，并与皮下组织层和深筋膜层动脉分支的伴行静脉汇合，分别形成皮下组织层、深筋膜层静脉网，进而汇入轴心动脉的伴行静脉。而真皮下血管网中与动脉不伴行的微静脉汇合成为小静脉，并逐渐聚集增粗，汇合加入浅非伴行静脉属支或即为属支的起点。
