Majority of hemodialysis patients are complicated by cardiovascular and cerebrovascular diseases, here we take a look at the blood dialysis hypotension why most but mainly has the following number of points;
1.Lack Hypovolemia : hypotension during dialysis majority with an excess of dehydration, so that blood volume sharply landing concerned within a very short time, an excess of ultrafiltration, causing the stroke volume and the output decreased, those conditions may be due to the emergence of:
(1) error ultrafiltration volume measure;
(2) dialysis patients reporting more weight for more than water;
(3) vascular access for poor venous, venous hypertension in positive caused the dialysis pressure increased ultrafiltration volume is too more, causing a lack of blood volume, but also more common in dialysis prior to blood volume lack, such as eating less sodium diet, nausea, vomiting, blood pressure medication and blood vessels to dilate and treatment.
2.Long-term use of low-sodium dialysate: dialysate sodium concentration lower than the plasma, resulting in lower serum sodium, plasma osmolality landing, body fluids into the cell, so hypovolemia.
3. Dialysis weight gain clear: timely in blood the amount of weight landed beyond the applicable discount more than 5% of the body weight before, prone to low blood pressure, increased body weight should be controlled below 4% between dialysis.
4. Unstable blood dialysis patient's vascular function: room Britain, pericarditis, endotoxin, infection and bleeding easily lead to hypotension.
Autonomic nervous function obstacles
Most of the ultrafiltration caused by excessive hypotension occurred in 1 hour after dialysis beginning, in the ultrafiltration certain amount without additional liquid, due to the dialysis membranes and allergic toxin-induced hypotension, occur earlier, more than the number of kinds of elements at the same time there , the timing of hypotension
