Valerio Jiménez O S, Moon J K, Jensen C L, Vohra F A, Sheng H P
Department of Paediatrics, Baylor College of Medicine, Houston, TX 77030.
J Biomed Eng. 1993 Mar;15(2):91-8. doi: 10.1016/0141-5425(93)90036-x.
An acoustic plethysmograph has been developed to provide routine total body volume measurements of pre-term (1.5-3.0 kg) infants. It operates near 50 Hz and is excited by band-limited 25 Hz span noise. Excitation, measurement, analysis, and environment are computer controlled for greater accuracy, speed, and objectivity in volume determinations. Performance tests produced volume measurements with a mean per cent error (+/- SD) of 0.77 +/- 0.66% for two phantoms with volumes of 2880 and 2130 cm3. Ten, one-minute volume measurements were obtained for 14 infants over a 20 to 30 min period. Their mean density was 1.061 +/- 0.028 g cm-3 and their weight ranged from 1294 to 2025 g.
一种声学体积描记仪已被开发出来，用于对早产（体重1.5 - 3.0千克）婴儿进行常规的全身体积测量。它在50赫兹附近运行，并由带宽限制为25赫兹的噪声激发。激发、测量、分析和环境均由计算机控制，以便在体积测定中实现更高的准确性、速度和客观性。性能测试对两个体积分别为2880立方厘米和2130立方厘米的模型进行体积测量，平均百分比误差（±标准差）为0.77±0.66%。在20到30分钟的时间段内，对14名婴儿进行了十次每次一分钟的体积测量。他们的平均密度为1.061±0.028克/立方厘米，体重范围在1294至2025克之间。
