Perry S G, Nathan A W, Cochrane T, Gosling P T, Camm A J
J Med Eng Technol. 1982 Nov-Dec;6(6):231-5. doi: 10.3109/03091908209041208.
A compact, portable recording system has been developed to record pulmonary-artery pressure in ambulatory patients. A transducer mounted on the tip of a conventional cardiac catheter is inserted percutaneously and positioned in the main pulmonary artery. Analogue circuitry, including peak and trough detectors, pre-processes the pressure/voltage waveform to yield sampled values for the systolic and diastolic pressures. Systolic and diastolic values sampled every 30 s are digitized and stored in CMOS semiconductor memory. Data acquired over a prolonged period is transferred to a microcomputer for permanent storage and subsequent analysis. Five patients were each successfully monitored for at least 24 h. The zero-level drift was less than 1% and gain stability was also better than 1% over 48 h. This device allows practical, safe, reliable and prolonged pressure recording and has wide-ranging clinical potential.
已开发出一种紧凑、便携式记录系统，用于记录动态监测患者的肺动脉压力。将安装在传统心导管尖端的传感器经皮插入并置于主肺动脉中。包括峰值和谷值检测器在内的模拟电路对压力/电压波形进行预处理，以得出收缩压和舒张压的采样值。每30秒采样一次的收缩压和舒张压值被数字化并存储在CMOS半导体存储器中。长时间采集的数据被传输到微型计算机进行永久存储和后续分析。五名患者均成功监测至少24小时。零位漂移小于1%，增益稳定性在48小时内也优于1%。该设备可实现实用、安全、可靠且长时间的压力记录，具有广泛的临床应用潜力。
