Why Hemodialysis patients have low blood pressure

Most hemodialysis patients are complicated by cardiovascular and cerebrovascular diseases, let's take a look at the majority of hemodialysis hypotension reasons, but mainly has the following number of points;
1 volume deficiency: the majority of hypotension during hemodialysis with an excess of dehydration to the sharp decline in blood volume in a very short period of time excessive ultrafiltration, causing the volume and cardiac output decrease may be due to the appearance of those conditions: (a) the amount of the error estimate for ultrafiltration; (2) more water for dialysis patients and overstatement weight; (3) poor venous vascular access, so that venous hypertension caused increased pressure dialysis, ultrafiltration volume is too more, causing a lack of blood volume, but also more common in dialysis before a blood volume deficiency, such as eating less, low sodium diet, nausea, vomiting, blood pressure medication and vasodilator agents treatment.
(2) long-term use low sodium dialysate: dialysate sodium concentration lower than the plasma, resulting in lower serum sodium, plasma osmolality landing, body fluids into the cell, to hypovolemia.
3 weight gain between dialysis clearly: in the blood beyond the proper amount of timely landing weight before discount more than 5% of body weight, prone to low blood pressure, weight gain between dialysis therefore should be controlled below 4%.
4 blood vessel function unstable dialysis patients: atrial Britain, pericarditis, endotoxin, infection and bleeding easily lead to hypotension.
5 autonomic function disorders
Hypotension caused by excessive ultrafiltration occurs mostly after 1 hour at the beginning of dialysis, ultrafiltration does not add a certain amount of liquid, the dialysis membrane and allergic toxin induced hypotension, then appeared earlier, these elements exist many kinds of , then the timing of hypotension increases.