Brain Behav. 2012 May;2(3):231-6. doi: 10.1002/brb3.46.
Between 5% and 37% of patients are not suitable for transtemporal insonation with transcranial Doppler (TCD). This unsuitability is particularly frequent in elderly females and non-Caucasians. We aim to evaluate TCD efficiency in a mixed Hispanic population in Santiago, Chile and to determine whether factors associated with the presence of optimal windows depend exclusively on patient-related elements. Seven hundred forty-nine patients were evaluated with power mode TCD. Optimal temporal windows (TWs) included detection of the middle, anterior, posterior cerebral arteries and terminal carotid. The patient's age and sex, the location of the examination, the time of day, whether the test was conducted on weekends and whether mechanical ventilation was used were recorded. Percentages of optimal windows were calculated. Examinations were deemed ideal if both TWs were optimal. TWs were obtained in 82% of cases. In univariate analyses, male sex (P < 0.001), an age below 60 years (P < 0.0001) and mechanical ventilation (P= 0.04) correlated with ideal TWs. Using logistic regression where dependent variable was a non-ideal window only male sex odds ratio (OR) 2.3 (1.51-3.45) and age below 60 OR 13.8 (7.8-24.6) were statistically significant. Our findings indicate that Hispanic populations have detection rates for TWs similar to Europeans and are affected by patient-related elements.
5%至 37%的患者不适合经颞窗(transcranial Doppler，TCD)超声检查。这种不适合的情况在老年女性和非白种人中尤为常见。我们旨在评估智利圣地亚哥的混合西班牙裔人群中 TCD 的效率，并确定与最佳窗口存在相关的因素是否仅取决于患者相关因素。749 名患者接受了功率模式 TCD 检查。最佳颞窗(temporal windows，TWs)包括检测大脑中动脉、大脑前动脉、大脑后动脉和颈内动脉终末段。记录了患者的年龄和性别、检查地点、一天中的时间、周末是否进行检查以及是否使用机械通气等因素。计算了最佳窗口的百分比。如果两个 TW 都最佳，则认为检查是理想的。82%的情况下获得了 TWs。在单因素分析中，男性(P < 0.001)、年龄低于 60 岁(P < 0.0001)和机械通气(P= 0.04)与理想 TWs 相关。在仅以非理想 TW 为因变量的逻辑回归中，男性的优势比(odds ratio，OR)为 2.3(1.51-3.45)，年龄低于 60 岁的 OR 为 13.8(7.8-24.6)，均具有统计学意义。我们的发现表明，西班牙裔人群的 TW 检测率与欧洲人群相似，并且受患者相关因素的影响。
