硬铝 动静脉 管状器官 (DAVF)
Overview
硬铝 arteriovenous fistulas (DAVFs) are rare, abnormal connections between arteries and veins in the dura, the protective membrane covering the brain and spinal cord. These abnormal vessels divert blood from the normal paths. If the volume of diverted blood flow is large, tissue downstream may not receive an adequate blood and oxygen supply. DAVFs are part of a group of conditions called 动静脉畸形.
An unusually heavy blood flow can lead to aneurysms (weakened spots in the blood vessel wall), 会破裂.
DAVFs can be caused by head trauma, infection, surgery or blood clots in the brain (thrombosis). 有些人天生就有davf.
Some DAVFs are life threatening and may cause headaches, seizures or, if they rupture, strokes. Others are benign and go undetected until discovered during treatment for other conditions.
Our approach to dural arteriovenous fistulae
加州大学旧金山分校, dural arteriovenous fistulas are diagnosed and treated by an expert team of neurologists, 神经外科十大赌博平台排行榜和神经放射学家. 我们提供全方位的治疗, including minimally invasive surgery to block blood flow to the DAVF and radiosurgery, a noninvasive procedure that uses a precisely targeted, high dose of radiation to destroy blood vessels feeding the DAVF.
奖 & 识别
-
是全国顶尖的十大赌博平台排行榜之一
-
加州最好，排名第一. 神经病学全国排名第二 & 神经外科
迹象 & 症状
The 症状 of dural arteriovenous fistulae (DAVF) can vary widely, 取决于瘘管的位置. Some DAVFs have no 症状 at all and aren't discovered until patients are evaluated for other neurological or vascular conditions.
一些常见症状包括:
- 头痛. 头痛 are among the most common 症状 with all types of DAVFs
- 耳鸣. An unusual ringing or humming in the ears may be symptom, particularly when the DAVF is near the ear. Some patients hear a pulsating noise caused by blood flow through the fistula.
- 类似中风的症状. All types of DAVFs can cause stroke-like 症状 and seizures, if they rupture. Bleeding in the brain is the most serious side effect and can cause permanent disability or death.
- 视力问题. 当daf位于眼睛附近时, 病人常抱怨视力受损, 眼睛红肿, 鼻窦充血.
诊断
The following tests may be used to diagnose your dural arteriovenous fistulae (DAVF) and help identify its size, 位置和血流模式.
- 脑血管造影术. 这 x射线检查 shows the structure of blood vessels and is the most important test in diagnosing DAVF. A harmless dye, visible on X-rays, is injected into an artery that supplies blood to the brain. As the dye flows through blood vessels to the brain, it will show any obstructions or leaks.
- 计算机断层扫描(CT). 在这个测试中， x射线 are used to create a 3-D image of the brain and may help identify any bleeding or hemorrhage. 获得更精确的血管图像, the cerebral angiography and magnetic resonance angiography (MRA) are performed.
- 磁共振血管造影(MRA). An MRA uses magnetic resonance imaging to create detailed images of blood vessels. 利用强磁场, it generates a 3-D image of the brain to detect, diagnose and aid the treatment of DAVFs and other vascular disorders. 在某些情况下, a dye is injected intravenously.
治疗
Treatment for dural arteriovenous fistulae (DAVF) depends on the blood vessels involved. 血管内技术, which are minimally invasive procedures that are performed through the blood vessels, 已经开发出安全治疗达夫的方法了吗.
一种方法, 称为栓塞, reduces blood flow to the DAVF by obstructing surrounding blood vessels. 在这个过程中, the DAVF is filled with specially designed coils, 堵塞血管的胶状物或球体.
Some fistulas can't be completely blocked with embolization and may require surgery to disconnect or close them. 在某些情况下, doctors may try to close the fistula with what's called stereotactic radiosurgery or the 伽玛刀.
加州大学旧金山分校健康 medical specialists have reviewed this information. It is for educational purposes only and is not intended to replace the advice of your doctor or other health care provider. We encourage you to discuss any questions or concerns you may have with your provider.
