Wiley R S, Wolfenson L B, Shepard L S
Comput Biomed Res. 1983 Feb;16(1):44-58. doi: 10.1016/0010-4809(83)90006-x.
An automated microcomputer system for monitoring heart rate and systolic time intervals (STI)--preejection period (PEP), left ventricular ejection time (LVET), and PEP/LVET--was implemented. The system, employing esophageal accelerometry, is economical and simple to operate. Being light and compact, it is therefore portable. The accuracy and reliability are no less than considerably more costly systems. The set of systolic time intervals can be measured and output in 6 sec. The system offers the advantage of monitoring STI in a larger number of surgical patients than do traditional systems due to its esophageal transducer.
实现了一种用于监测心率和收缩期时间间期（STI）——射血前期（PEP）、左心室射血时间（LVET）以及PEP/LVET——的自动化微型计算机系统。该系统采用食管加速度测量法，经济且操作简单。因其轻巧紧凑，所以便于携带。其准确性和可靠性不低于成本高得多的系统。收缩期时间间期集可在6秒内测量并输出。由于其食管换能器，该系统相比传统系统能够在更多外科手术患者中监测STI。
