Richardson J R, Ferguson J, Hiscox J, Rawles J
Royal Aberdeen Children's Hospital.
J Accid Emerg Med. 1998 Sep;15(5):304-7. doi: 10.1136/emj.15.5.304.
Stroke distance, the systolic velocity integral of aortic blood flow, is a linear analogue of stroke volume; its product with heart rate is minute distance, analogous to cardiac output.
To investigate the feasibility of assessing cardiac output in children with a simple non-invasive Doppler ultrasound technique, and to determine the normal range of values.
Peak aortic blood velocity, stroke distance, and minute distance were measured through the suprasternal window in 166 children (mean age 9.6 years, range 2-14) using a portable non-imaging Doppler ultrasound instrument.
The technique was well tolerated by all the children participating. Mean peak aortic blood velocity was 138 cm/s and was independent of age. Mean stroke distance was 31.8 cm and showed a small but significant increase with age; mean minute distance was 2490 cm and fell with age, as did heart rate.
Suprasternal Doppler ultrasound measurement of stroke distance is a convenient, well tolerated, non-invasive technique for the assessment of cardiac output in children. The normal range of values during childhood has been established. The technique has great potential for assessing hypovolaemia in children.
搏出距离，即主动脉血流的收缩期速度积分，是每搏输出量的线性类似物；其与心率的乘积为每分钟距离，类似于心输出量。
探讨用一种简单的无创多普勒超声技术评估儿童心输出量的可行性，并确定其正常范围值。
使用便携式非成像多普勒超声仪，通过胸骨上窝窗口测量了166名儿童（平均年龄9.6岁，范围2 - 14岁）的主动脉血流峰值速度、搏出距离和每分钟距离。
所有参与的儿童对该技术耐受性良好。主动脉血流平均峰值速度为138厘米/秒，且与年龄无关。平均搏出距离为31.8厘米，随年龄有小幅但显著的增加；平均每分钟距离为2490厘米，随年龄下降，心率也如此。
胸骨上窝多普勒超声测量搏出距离是一种方便、耐受性良好的无创技术，用于评估儿童的心输出量。已确定儿童期的正常范围值。该技术在评估儿童低血容量方面具有很大潜力。
