摘要
目的利用超声心动图定位右心房中心点在体表的位置，为用无创方法准确测定中心静脉压提供基准点。方法通过CT三维重建技术，对30例进行胸部CT检查的患者定位右心房中心点位置；依据空间几何原理，通过超声心动图定位右心房中心点，并标记于前胸壁；将超声定位点与CT定位点对比，用二者间绝对距离、垂直距离、整个操作时间来评估测量的准确性和可行性。结果平均绝对距离为0．76cm（95％可信区间：0．62～0．81cm），平均垂直距离为0．16cm（95％可信区间：-0．02～0．34cm），平均操作时间为43．80s（95％可信区间：40．01～47．40s）。结论依据空间几何原理的超声定位法可以准确、简便地定位右心房中心点在体表的位置，将有助于提高中心静脉压无创测定的准确性。
Objective To propose an accurate method of noninvasive determination of central venous pressure（CVP） by locating the central point of right atrium （RA） using echocardiography. Methods Through the 3D reconstruction, the accurate positions of RA of 30 patients who had been examined by multislice 3-dimensional computed tomography for chest imaging were recorded. Based on solid geometric principles,the central point in RA was located by echocardiography and then compared with CT location point. The accuracy and feasibility were assessed by absolute distance （Da）, vertical distance （Dv） and the whole time of location （T） between the two points. Results Mean Da,Dv and T of the whole subjects were 0.76 cm （95% CI.-0.62 to 0.81 cm）, 0.16 cm （95% CI： - 0.02 to 0.34 cm）, and 43.80 s （95% CI：40.01 to 47.40 s）, respectively. Conclusions The echocardiographic method on the basis of solid geometry proposed in this study could be used to locate the central point in RA accurately and simply. Thus it would he helpful to improve the accuracy of noninvasive determination of central venous pressure.
出处
《中华超声影像学杂志》
CSCD
北大核心
2015年第4期291-293,共3页
Chinese Journal of Ultrasonography
基金
国家自然科学基金（31400803）
关键词
超声心动描记术
右心房中心点
Echocardiography
Central point of right atrium
