Objective To explore the correlation of the TIAM2 functional gene mutations with the bleeding events in patients with coronary heart disease who undergone PCI and postoperative taken anti-platelet drug clopi-dogrel. Methods One hundred and twenty Chinese Han patients who had undergone PCI and postoperative taken anti-platelet drug clopidogrel were orderly enrolled from Guangdong General Hospital. Followed for 6 months after PCI, PCR sequencing was applied to test TIAM2 promoter region genotyping assay. Results After follow-up six months , 113 cases were remained lost of 7 cases , , including 19 cases with bleeding and 94 cases without bleed-ing; Bleeding risk in patients with diabetes mellitus (OR=3.115) or taking statins (OR=11.539), may be high, but there was no significant difference (P > 0.05); TIAM2 promoter region had three variants (c.3168+3116C>T, c.3168+3261A>G,c.3168+3596A>C), including wild-type, heterozygous, and homozygous. The probability of pa-tients with bleeding were 36.84%, 52.63%and 10.53%, and there is a certain chain of state , but the genotype was not significantly correlated with bleeding events of clopidogrel antiplatelet therapy (P>0.05). Conclusion Clopi-dogrel antiplatelet therapy bleeding events were not significantly correlated with TIAM2 functional gene mutation.

BACKGROUND:The mechanical valves used in the adult Luo-Ye pump have a large size and great destruction to blood, which are not suitable for infant ventricular assist pump. Therefore, designing and producing a high molecular valve with smal size and low incidence of thrombosis is a research hotspot. OBJECTIVE:To design and produce a valve of 20 mL infant Luo-Ye pump, and to test its basic functions and fatigue properties. METHODS:The size and shape of valve was designed with MASTERCAM software, polyurethane valve was obtained through producing the valve model and plastic injection;the static leakage, pressure drop and fatigue resistance of polyurethane valve were tested according to the ISO5840 requirements. RESULTS AND CONCLUSION:The polyurethane trefoil valve was produced, but the failure rate of plastic injection was high;the basic function of the trefoil valve met the ISO5840 requirements bascial y;after continuously operated 1.0×107 times, stroke volume of 20 mL Luo-Ye pump was changed 5.2%, and two polyurethane valves and valve leaflets did not change and damage. Polyurethane trefoil valve was designed and produced successful y;polyurethane valves could meet the needs of 20 mL Luo-Ye pump, which already have the ability to clinical trials.