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Objeetive To investigate the relationships of CYP2C19 genotype polymorphism with platelet inhibition rate and clopidogrel low responsiveness in patients taking percutaneous coronary intervention (PCI) during perioperative administration of clopidogrel.Methods 404 patients taking clopidogrel after PCI were included from February 2016 to February 2017.They were divided into three groups:fast metaboliszer,moderate metaboliszer and slow metabolizer,according to the CYP2C19 genotype.Platelet inhibition rate induced by adenosine diphosphate (ADP) was detected by thrombelastogram,platelet inhibition rate ＜ 30％ was defined as clopidogrel low responsiveness (CLR) group and the relationships between the three groups were analyzed in view of CYP2C19 genotype and the platelet inhibition rate and the clopidogrel low responsiveness.Results (1) The proportions of the three groups was 45.5％,45.3％ and 9.2％ in the 404 patients,no statistically significant difference among the three groups in general data (age,sex,platelet,hypertension,diabetes mellitus,hyperlipidemia) (P ＞ 0.05).(2) There was no statistically significant difference in the platelet inhibition rate between the three groups (P =0.312).(3) There was no significant difference in the clopidogrel low responsiveness between the three groups (P =0.295),with the fast metabolizer group vs.intermediate metabolizer (P =0.522),the fast metabolizer group vs.the slow metabolizer (P =0.117) and the intermediate metabolizer group vs.slow metabolizer (P =0.255).Conclusion There is no correlation of CYP2C19 genotype with platelet inhibition rate and clopidogrel low responsiveness in patients taking clopidogrel after PCI.Only the detection of CYP2C19 genotype may not accurately predict the antiplatelet aggregative activity of clopidogrel.
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Objective To investigate the ultrasonic appearance of peripheral neurilemmoma.Methods Ultrasonic appearances of 43 patients with 46 neurilemmomas confirmed by surgery and pathology were analyzed retrospectively and compared with their MRI and pathological features.Results Forty-five neurilemmomas were with regular shape and clear boundary,except one at the root of nerve C4 that was irregular in shape and unclear in boundary,like adumbbell.Sonography showed that there were 30 neurilemmomas displaying as solid tumors,15 as cystic and solid,and 1 as entirely cystic.Posterior echoenhancement,target sign,rat tail sign and vessels accompanying sign were found in 39,21,23 and 17 neurilemmomas,respectively.There were 4 neurilemmomas with ultrasound blood flow grade 0,9 with grade Ⅰ,22 with gradeⅡ,and 11 with grade Ⅲ.The target signs were found in 21 cases (21/46,45.6％) and 26 cases (26/46,56.5 ％) by ultrasound and MRI,respectively.The capability of ultrasound finding the target sign in neurilemmoma was comparable to MRI(Kappa =0.527,P ＜0.001).The diagnostic accuracy rate of neurilemmoma by ultrasonography was 73.9％(34/46).Conclusions The ultrasound has a relatively high detection of the target sign in neurilemmoma,which may provide a new basis for the ultrasonic diagnosis of neurilemmoma.