摘要：Atrial fibrillation is an “invisible killer” of human health. It often induces high-risk diseases, such as myocardial infarction, stroke, and heart failure. Fortunately, atrial fibrillation can be diagnosed and treated early. Low-level vagus nerve stimulation(LL-VNS) is a promising therapeutic method for atrial fibrillation. However, some fundamental challenges still need to be overcome in terms of flexibility,miniaturization, and long-term service of bioelectric stimulation devices. Here, we designed a closedloop self-powered LL-VNS system that can monitor the patient’s pulse wave status in real time and conduct stimulation impulses automatically during the development of atrial fibrillation. The implant is a hybrid nanogenerator(H-NG), which is flexible, light weight, and simple, even without electronic circuits,components, and batteries. The maximum output of the H-NG was 14.8 V and 17.8 μA(peak to peak). In the in vivo effect verification study, the atrial fibrillation duration significantly decreased by 90% after LLVNS therapy, and myocardial fibrosis and atrial connexin levels were effectively improved. Notably, the anti-inflammatory effect triggered by mediating the NF-κB and AP-1 pathways in our therapeutic system is observed. Overall, this implantable bioelectronic device is expected to be used for self-powerability,intelligentization, portability for management, and therapy of chronic diseases.

摘要：目的探讨以Schiempflug原理设计的Pentacam眼前节分析仪和以Placido盘为基础的Keratron Scout角膜地形图仪测量角膜前表面曲率的重复性,并分析两种仪器测量结果的一致性。方法随机数字表法随机选取于2018年1月1~30日在我院眼视光中心行角膜激光近视矫正术前检查的69例患者,所有受试者由同一检查者分别采用Pentacam眼前节分析仪和Keratron Scout角膜地形图仪重复测量3次,两种仪器测量顺序随机,记录患者平坦轴角膜曲率(Kf)、陡峭轴角膜曲率(Ks)和平均角膜曲率(Km),采用变异系数(CV%)、组内相关系数(ICC)(95%CI)和Cronbach’s Alpha系数评价两种仪器测量结果的可重复性,t检验比较两种仪器测量结果的差异,Pearson相关分析法分析其相关性;Bland-Altman图分析一致性界限范围。结果3次重复测量时,Pentacam眼前节分析仪测量Kf的CV为0.39%,ICC(95CI%)为0.811(0.651~0.907),Cronbach’s Alpha系数为0.935,Ks的CV为0.28%,ICC为0.975(0.959~0.985),Cronbach’s Alpha系数为0.991,Km的CV为0.25%,ICC为0.944(0.911~0.967),Cronbach’s Alpha系数为0.981;Keratron Scout角膜地形图仪测量Kf的CV为0.43%,ICC为0.820(0.678~0.951),Cronbach’s Alpha系数为0.967,Ks的CV为0.47%,ICC为0.937(0.908~0.959),Cronbach’s Alpha系数为0.978,Km的CV为0.39%,ICC为0.937(0.907~0.958),Cronbach’s Alpha系数为0.978。Pentacam眼前节分析仪和Keratron Scout角膜地形图仪测量Kf、Ks和Km的结果差异无统计学意义(Kf:P=0.187;Ks:P=0.721;Km:P=0.169),两种仪器测得结果有相关性(Kf:r=0.622,P=0.000;Ks:r=0.980,P=0.000;Km:r=0.983,P=0.000),Kf的95%Lo Al为-0.43~0.40D,Ks的95%Lo Al为-0.56~0.59 D,Km的95%LoAl-0.46~0.39 D。结论以Schiempflug原理设计的Pentacam眼前节分析仪和以Placido盘为基础的Keratron Scout角膜地形图仪测量角膜屈光手术患者角膜前表面曲率均具有良好的可重复性,两种仪器测量得角膜前表面曲率结果准确,一致性好,可以相互验证。

摘要：目的建立凝血试验自动审核方案,验证并应用于常规凝血检验。方法采用实验室信息管理系统(LIS)、检测设备和中间软件联合构建自动审核实施方案。采用数据库模拟运行和人工审核的方式对历史检验报告进行自动审核规则验证。评估实施凝血自动审核方案后与人工审核之间实验室内周转时间(TAT)情况。结果构建的自动审核方案涉及9项凝血检验项目,在LIS中设计了13条自动审核规则。在2018年12月至2019年11月期间临床实践应用中,98.86%的检验报告执行了自动审核程序,检验报告自动审核通过率为73.66%,26.34%检验报告被系统拦截后人工审核。凝血检验单项平均通过率为89.26%,其中PT通过率(97.75%)最高,D-dimer通过率(69.38%)最低。实施自动审核后的实验室内TAT中位数和第90百分位值分别较未自动审核时缩短5 min和15 min。实施自动审核期间,自动审核的凝血检验报告TAT的中位数和第90百分位值较人工审核分别缩短22 min和27 min。结论构建的自动审核方案在临床实施后可缩短实验室内TAT,提高工作效率。