Fetal Monitoring by Using TV Game Machine at Patient's Home

利用最流行的电视游戏机，结合新开发的紧凑型遥测胎儿监护仪，安全、经济地开展了患者家中胎儿监护，该胎儿监护仪发送3mhz连续波（c-w）多普勒信号，同时获得子宫收缩，尺寸为77X57X21 mm的口袋大小，发射55-710 MHz FM波，天线同时转换为多普勒信号引线。通过电子方式将病人的终端与游戏机分离，建立了安全、廉价的监测系统。在实际使用中，在准备好并激活终端后，患者只需将卡带盒插入电视游戏机的插座中，在一块紧凑的单板上包含FM接收器、A/D转换器、附加PROM、时钟等电路。胎率的测量是通过连续计算自相关系数来实现的，并在电路板上专门编写了ROM。通过这些简单的程序，电视机就可以转换成胎儿家庭监护装置，连续指示胎儿的心率模式和子宫收缩情况。系统开发中最昂贵的部分是软件编程，包括将复杂的数据处理软件翻译成特定的游戏机语言。将生物医学数据显示到电视游戏机中，在将缓慢移动的胎心率表达到具体移动的“游戏场景”和“人物”中也存在一定的困难。即使增加一些其他功能，如数据存储或患者家与医院之间的双向数据传输，该系统的总成本也可以估计为最低，并且可以很容易地保证患者的安全。综上所述，通过将家庭电视游戏机改造为具有遥测紧凑型前端，建立了具有成本效益的患者家庭胎儿监测系统。

Fetal monitoring at patients' home has been safely and economically launched by utilizing most popular TV game machines, combined with newly developed compact-sized and telemetric fetal monitor, which sends 3 MHz continuous wave (c-w) Doppler signal and simultaneously obtaining the uterine contraction with the pocketable size of 77X57X21 mm, transmitting 55-710 MHz FM waves with the antenna which is simultaneously converted to the lead wire of Doppler signals.By electronically separating the patient's terminal from game machines, safe and inexpensive monitoring has been established. In practical use, after preparing and activating the terminal, patients should simply insert the cassette case into the receptacle of TV game machine, containing FM receiver , A/D converter, additional PROM, clock and other circuits on a compact single board. Fetal rate measurement has been afforded by the continuous calculation of autocorrelation coefficients, with the specially programmed ROM on the board. By these simple procedures, TV machine can be converted into a fetal home monitoring device, continuously designating the fetal heart rate patterns and uterine contractions.Most expensive portion of the system development consists in the programming of software including the translation of complicated data processing software into the specific game machine language. The display of the biomedical data into TV game machine also causes some difficulties in expressing the slow moving fetal heart rate into the specifically moving "game scene" and "characters". Total cost of the system can be estimated minimum and the safety of the patients can be easily assured, even by adding some other functions such as a data-storage, or a bidirectional data-transferring between the patient's home and hospital. As a conclusion, cost effective fetal monitoring system at the patients' home has been established by modifying a Home TV game machine with a telemetric compact front end.