急性缺血性脑卒中改良ASITN/SIR侧支循环评分与CTP灌注参数的相关性分析

目的探讨急性缺血性脑卒中(AIS)改良美国介入和治疗神经放射学协会/介入放射学协会(ASITN/SIR)侧支循环评分与CT灌注成像(CTP)参数的相关性。方法选取我院急诊入院且发病时间<6 h的AIS患者192例,均进行多模态CT检查。统计基于CTA下改良ASITN/SIR侧支循环评分评估侧支循环,分析侧支循环情况与CTP灌注参数。结果192例AIS患者侧支循环良好127例(占66.1%,侧支循环良好组),侧支循环差65例(33.9%,侧支循环差组),每例患者CT检查的总辐射剂量范围为4.9~6.2 mSv,平均为5.9 mSv;改良ASITN/SIR侧支循环评分与梗死核心体积差异有统计学意义(Spearman’s rho=-0.469,P=0.005<0.05),与低灌注区及严重低灌注区均差异有统计学意义(Spearman’s rho分别为-0.314、-0.429,P分别为0.040、0.009,均<0.05),与不匹配率差异有统计学意义(Spearman’s rho=0.308,P=0.038<0.05);相对于侧支循环良好组,侧支循环差组患者梗死核心、低灌注及严重低灌注区体积明显更大,差异有统计学意义(P<0.05),不匹配率、相对脑血流量、相对脑血容量、相对平均通过时间及相对最大峰值时间明显更低(或小),差异有统计学意义(P<0.05)。结论基于CTA的改良ASITN/SIR侧支循环评分可较好地评估AIS患者侧支循环状态,且改良ASITN/SIR侧支循环评分与CTP灌注参数显著相关。

DUAL ASPECTS OF THE QUASITRIANGULAR BIALGEBRAS AND THE BRAIDED BIALGEBRAS

It is shown that the dual bialgebra of any quasitriangular bialgebra is braided, and the dual bialgebra of some braided bialgebra is quasitriangular.Also it is proved that every nondegenerate finite dimensional braided (dually, quasitriangular) bialgebra has an antipode.

Nakayama automorphisms of PBW deformations and Hopf actions

Poincaré-Birkhoff-Witt(PBW)deformations of Artin-Schelter regular algebras are skew CalabiYau.We prove that the Nakayama automorphisms of such PBW deformations can be obtained from their homogenizations.Some Calabi-Yau properties are generalized without Koszul assumption.We also show that the Nakayama automorphisms of such PBW deformations control Hopf actions on them.