Abstract: Objective To investigate the effect of different speed of perioperative fluid infusion on rate of platelet aggregation during percutaneous coronary intervention. Methods 60 patients accepted percutaneous coronary intervention (PCI) were divided into 2 groups. The control group (n=30) accepted fluid infusion in speed of 1.5~2 ml/kg·h, while the trial group (n=30) with the speed of 6~9 ml//kg·h after coronary arteriongraphy. Their blood pressure, heart beat, rate of platelet aggregation and osmotic pressure of plasma were recorded. Results It was not significantly different in rate of platelet aggregation before and 4 h after operation in the control group (P>0.05), and it was significantly lower 4 h and 1 d after operation in the trial group (P<0.05). Conclusion Fast fluid infusion perioperatively can lower the rate of platelet aggregation, which may improve the success of PCI and reduce the acute thrombosis

Key words: percutaneous coronary intervention, speed of fluid infusion, rate of platelet aggregation, nursing