Definition
Establishing a suitable vascular pathway is a prerequisite for blood dialysis.
The ideal vascular passage should meet the following conditions:
1 blood flow reaches 100 ~ 300ml / min;
2 can be used repeatedly, easy to operate, and patient The daily life has little impact;
3 security, not easy to occur, thrombosis, infection, etc., good cardiovascular stability.
Classification
1, temporary vascular passage
(1) Outer fistula
(2) direct Piercing vein
(3) intravenous indwelling catheter
two, permanent vascular passage
(1) moving - intravenous Mercail: The most safe, the longest application time, the most wide range of vascular pathways.
(b) Vascular transplantation.
Common complications of permanent vascular passages are: thrombosis, infection, increase the heart burden caused by heart failure, distal ischemia, pseudohetic aneurysm, etc., the thrombus is the main cause of failure of the vascular passage. Early thrombosis after surgery should be repeated as soon as possible to remove thrombosis and eliminate incentives. The thrombosis formed in long-term use has existence of vascular stenosis, low blood pressure, high coagulation state, etc., is difficult to handle, often causes fistula.