Objective To analyze the blood volume status of dialysis hypotension and non-dialysis hypotension in hemodialysis patients.
Methods Fifty-one patients with maintenance hemodialysis were divided into hypotension group (23 patients) and control group (28 patients) according to auompanied with or not symptomatic hypotension during dialysis in last three months. The blood volume, blood pressure and heart rate of hemodialysis patients were analyzed retrospectively. Results The interdialytic weight gain and ultrafiltration volume of hypotension group were significantly higher than control group (P<0.02). A comparison between intradialytic hypotesion group and none hypotension group showed significant difference in blood volume less, blood pressure decrease and heart rate increase during hemodialysis (P<0.05). Conclusion The immediate cause of intradialytic hypotension is intravascular hypovolemia related to the dialysis procedure. Particularly in patients with a compromised cardiovascular system, the risk of hypotension is high. We conclude that administration of fluid is an effective method in maintaining BP and in presering BV in hypotension-prone dialysis patients.