As mentioned, low blood pressure occur in 30% to 40% of cases during dialysis, while in the dialysis interval, low blood pressure often in patients on long-term dialysis with the appearance of 5% to 10%. There are a few reasons for low blood pressure during dialysis.
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Decreased blood volume
In the late stages of kidney disease, diabetic nephropathy in particular, the blood vessels are damaged and become difficult to contract and relax. When the water is removed in dialysis, blood vessels fail in contracts, which causes low blood pressure.
If heart disease occur in patients with heart disease, their heart function and heart rate are messy. With not enough effective blood volume in their body, there is more blood in the peripheral blood circulation to compensate for water removed in dialysis, low blood pressure going. Furthermore, anemia in patients with kidney disease also make weak heart muscles in contracts and pump more blood the heart, blood pressure decreases due to lack of blood.
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More water removed during dialysis
If dry weight is drafted lower than it should be, more water will be removed from the blood of patients during dialysis and their blood volume decreases, which causes low blood pressure. The dry weight is the weight after dialysis when patients feel fresh without shortness of breath, swelling, thirst and other discomforts. Low dry weight causes dehydration and decrease blood pressure in dialysis, while the top of dry weight will deposit the excess water in the body and swelling are still not alleviated after dialysis.
other reasons
dialysate Acetate plays a role in limiting contraction of heart muscles, relaxing blood vessels and reducing the volume of blood in one direction. The same goes for hypotensive before dialysis and temperature of the dialysate during dialysis. Hypotensive can effectively prevent the blood vessels contract, while high temperatures dialysate to relax the blood vessels in the skin and reduce the peripheral blood volume. What's worse, high temperature will weaken the sensitivity of blood vessels and make them fail in the volume of comment today in the blood.
