腹部创伤定点超声(FAST)和CT在闭合性腹腔脏器损伤诊断中的价值比较

探究并比较腹部创伤定点超声(FAST)和CT在闭合性腹腔脏器损伤中的诊断价值。方法:筛选我院2017年5月—2022年5月收治的90例闭合性腹腔脏器损伤患者,分别对其开展FAST以及CT诊断,以手术结果为金标准,对比2种检测方式的诊断符合率,对比腹部创伤定点超声与CT诊断时间,将90例患者按照预后情况区分为休克组(n=51)和未休克组(n=39),对比2组患者下腔静脉-塌陷指数(IVC-CI)、休克指数的差异,最后通过绘制ROC曲线的方式计算IVC-CI与休克指数对闭合性腹腔脏器损伤患者休克预测价值。结果:腹部创伤定点超声与CT诊断在肾损伤、脾破裂、肝破裂、空腔脏器破裂等腹部损伤类型的诊断准确率方面组间比较无差异(P>0.05);腹部创伤定点超声诊断时间平均为(7.02±3.01)分钟,低于CT诊断的(25.13±2.98)分钟,差异具有统计学意义(P<0.05);休克组患者的IVC-CI指数、休克指数均较未休克组更高,组间差异具有统计学意义(P<0.05);休克指数对腹部创伤患者休克预测曲线下面积(AUC)为0.8547(95%CI=0.7559-0.9535,P<0.0001),IVC-CI对腹部创伤患者休克预测AUC为0.8451(95%CI=0.7535-0.9368,P<0.0001)。结论:对于闭合性腹腔脏器损伤患者,腹部创伤定点超声与CT诊断准确率相当,但腹部创伤定点超声诊断时间更短,同时腹部创伤定点超声定量指标如IVC-CI指数、休克指数能更好的预测闭合性腹腔脏器损伤患者休克的发生,建议临床推广运用。

SI、TRI联合检测在预测急性冠状动脉综合征并发心源性休克中的应用价值分析

探讨SI、TRI联合检测在预测急性冠状动脉综合征并发心源性休克中的应用价值。方法:选取2020年4月至2021年5月我院收治的需行PCI治疗的患者30例,30例患者均行SI、TRI联合检测。观察比较SI检测、SI和TRI联合检测结果与GRACE结果;分析SI和TRI联合检测结果预测急性冠状动脉综合征并发心源性休克中的效能。结果:SI检测、SI和TRI联合检测诊断良、恶性的结果与GRACE结果一致的分别为15个、6个;19个、7个,(P<0.05);SI和TRI联合检测的灵敏度(88.89%)、特异度(85.71%)、AUC(0.768)显著优于SI检测(66.67%、62.50%、0.705),(P<0.05)。结论:SI、TRI联合检测在预测急性冠状动脉综合征并发心源性休克中具有一定应用价值。

A measurement-device-independent quantum key distribution protocol with a heralded single photon source

With a heralded single photon source(HSPS), a measurement-device-independent quantum key distribution(MDIQKD) protocol is proposed, combined with a three-intensity decoy-state method. HSPS has the two-mode characteristic, one mode is used as signal mode, and the other is used as heralded mode to reduce the influence of the dark count. The lower bound of the yield and the upper bound of the error rate are deduced and the performance of the MDI-QKD protocol with an HSPS is analyzed. The simulation results show that the MDI-QKD protocol with an HSPS can achieve a key generation rate and a secure transmission distance which are close to the theoretical limits of the protocol with a single photon source(SPS). Moreover, the key generation rate will improve with the raise of the senders' detection efficiency. The key generation rate of the MDI-QKD protocol with an HSPS is a little less than that of the MDI-QKD protocol with a weak coherent source(WCS) in the close range, but will exceed the latter in the far range. Furthermore, a farther transmission distance is obtained due to the two-mode characteristic of HSPS.