应变-血压指数评价2型糖尿病患者中型动脉弹性的初步研究

目的 探讨应用应变-血压指数评价2型糖尿病患者肱动脉和胫前动脉弹性的临床价值及可行性.方法 随机选取2型糖尿病患者46例作为病例组,健康志愿者50例作为对照组.应用应变和应变率成像对肱动脉和胫前动脉进行检查.通过应变和应变率成像获得肱动脉和胫前动脉的最大圆周应变,同时测量被检者肱动脉和胫前动脉血压,肱动脉和胫前动脉的应变-血压指数=最大圆周应变/(局部收缩压-局部舒张压)/局部舒张压]×100%,胫-肱指数=胫前动脉的应变-血压指数/肱动脉应变-血压指数,踝肱指数=胫前动脉收缩压/肱动脉收缩压.将病例组和对照组的参数进行对比分析.结果 2型糖尿病患者的胫前动脉应变-血压指数和胫-肱指数明显低于对照组,差异有统计学意义(P<0.05),而2型糖尿病患者的肱动脉应变-血压指数略低对照组,但差异无统计学意义(P>0.05).两组间的踝肱指数差异无统计学意义(P>0.05).结论 应变-血压指数可以作为评价2型糖尿病患者中型动脉弹性改变的新指标,胫-肱指数可以反映2型糖尿病患者胫前动脉和肱动脉弹性变化的相对差异.

Preliminary study on elasticity of medium-sized artery in patients with type 2 diabetes through strain-blood pressure index

Objective To investigate the clinical value and the feasibility of strain-blood pressure index(SBPI) in assessing the elasticity of brachial artery and anterior tibial artery in patients with type 2 diabetes mellitus. Methods Forty-six type 2 diabetic patients and 50 healthy volunteers were involved. Maxmum of circumferential strain (CSmax) of brachial artery and anterior tibial artery were acquired through strain and strain rate imaging(Xstrain). Local systolic blood pressure(LSBP) and local diastolic blood pressure(LDBP) of brachial artery and anterior tibial artery were measured at the same time. SBPI,tibial-brachial index (TBI), and ankle-brachial index(ABI) were calculated, SBPI = CSmax/(LSBP-LDBP) /LDBP]×100%,TBI = SBPI of anterior tibial artery/SBPI of brachial artery, ABI = LSBP of anterior tibial artery/LSBP of brachial artery. Parameters were compared between the case group and the control group. Results SBPI of anterior tibial artery and TBI had significant difference between the case group and the control group( P < 0.05), while SBPI of brachial and ABI had no significant difference( P >0. 05).Conclusions SBPI might be a new index for evaluating the elasticity of medium-sized arteries in patients with type 2 diabetes, and different changes caused by type 2 diabetes between brachial artery and anterior tibial artery could be reflected by TBI.