Causes of Low Blood Pressure after Dialysis
What causes low blood pressure after or during dialysis? Low blood pressure also can be called Hypotension which refers to the decreased impact on blood vessel wall. Low blood pressure is the most common complication of dialysis and also one of the leading causes of death among people who are on dialysis. Well, we all hear about high blood pressure occurs easily when kidney is damaged and why blood pressure decreases when kidney failure patients to do dialysis or after dialysis?
In cases of kidney failure, blood pressure increases due to increase of rennin which is a hormone and normally secreted by kidney. When kidney tissues are injured for some reasons, large amounts of rennin will be secreted. High rennin level in the body will strengthen the activity of angiotensin which has function of shrinking blood vessels. Besides, with the decrease of renal filtration function, large amounts of fluid build up in the blood vessels and this also increase blood pressure. Tight control of high blood pressure helps to slow down illness progression, so ACE inhibitors and ARBs are always used to control blood pressure by kidney disease patients.
Dialysis is a medical procedure which can help to clear harmful substances away from blood. However, dialysis does not work as well as our kidney, as during this process, not only harmful substances, but also some nutrition are removed as well. Removing too much weight at one time can cause quick decrease of bloodstream in kidney, and thus lead to low blood pressure. To prevent this condition, having a proper control of the dry weight is very important. In addition, aside from quick removal of too much weight, taking antihypertensive pills before dialysis also should be blamed for low blood pressure. As we have mentioned above, to have a tight control of high blood pressure, medications like ACE inhibitors and ARBs are always applied. These medications are helpful; however, for kidney failure patients who are on dialysis, they need to regular the dose of medications before dialysis, otherwise, low blood pressure will be caused. How much antihypertensive are needed generally depends on the specific illness condition.
For low blood pressure caused by dialysis, it is usually accompanied by dizziness, increase in pulse, cold skin and chest pain and so on. When these discomforts occur, dialysis patients should be alter about their blood pressure, so as to take measures timely and prevent further problems effectively.
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