Abstract:
Objective To explore the role of modified airtight blood return method in reducing the risk of thrombosis of arteriovenous fistula in patients with maintenance hemodialysis.
Methods A total of 50 patients with regular hemodialysis from November 2021 to October 2022 were selected as research objects. From November 2021 to April 2022, the patients with traditional airtight bidirectional blood return method were included in control group, while the patients with modified airtight blood return method from May 2022 to October 2022 were included in modified group. The blood pressure after removing the dialyzer, compression time at the arteriovenous fistula puncture site after removing the dialyzer, fistula leakage rate, incidence of thrombus, residual red blood cells in the dialyzer, total time for blood return and physiological saline volume used for blood return were compared between the two methods.
Results In the modified group, blood return volume after removing the dialyzer, blood return time after removing the dialyzer, blood pressure after removing the dialyzer, compression time at the arteriovenous fistula puncture site after removing the dialyzer, fistula leakage rate, physiological saline volume used for blood return after removing the dialyzer, incidence of internal fistula thrombosis, and residual red blood cells in the dialyzer tube were significantly lower or shorter than those in the control group (P < 0.05).
Conclusion Modified airtight blood return method can shorten the blood return time after removing the dialyzer, decrease the consumption of 0.9% sodium chloride solution, reduce the fistula leakage rate, shorten the compression time at the arteriovenous fistula puncture site after removing the dialyzer, reduce residual red blood cells in the dialyzer tube after removing the dialyzer, and fully reduce the blood viscosity in the local area of the internal fistula under the condition of blood return with equivalent physiological saline.
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