Studies on the development of telemedicine network system in the disaster emergency medical treatment

我们尝试开发了日本第一个无线传输系统，使用400 MHz带宽的电波来观察救护车上的样子。虽然现在有很多类似的设备，但不可能通过安装在救护车上来操作它。由于这些系统工作在高频段，而电波功率又受到国内法律的限制，要想实现这种系统的实际运行，电波功率应该很大。因此，有必要从根本上降低频带范围。然而，当频段降低时，放在电波上的信息量会减少，从而使救护车上的图像传输变得非常困难。在此基础上，尝试解决了高功率与大信息量之间的矛盾，并取得了较好的效果。首先，该系统的优点是在初始成本内不需要运行成本。在许多情况下，通信费成为一个问题，因为它是在一年中按预算运营的。在该系统中，除了患者的重要数据外，我们还可以免费了解救护车上的情况。其次，即使是在大范围灾难等移动运营商的通信基础设施不起作用的时候，由于使用了原有的无线基础设施，该系统也不受影响。结果表明，该系统可以作为远程医疗网络系统应用于灾难紧急医疗。

We tried the development of the first wireless transmission system in Japan that used the electric wave of 400MHz bandwidth to observe the appearance in the ambulance. Though a lot of similar equipment exist now, it is not possible to operate it by installing it in the ambulance. Because these operate in a high frequency band region, and the electric wave power is limited by the domestic law.For practicable operation of such a system, the electric wave power should be large. Therefore, it is necessary to lower the frequency band region basically. However, the volume of information put on the electric wave will decrease when the frequency band region is lowered, consequentially, transmitting the appearance in the ambulance becomes very difficult. Then, we tried to the conflicting problem of making to high power and securing to the telephotography volume of information, and achieved the result.First, the advantage of this system is that the running cost is unnecessary only in an initial cost. In many cases, the communication charge becomes a problem because it is operated by the budget during year. In this system, we can know the appearance in the ambulance in addition to patient's vital data free of charge.Secondarily, even if it is time when it doesn't function the communication infrastructure of the mobile carrier like the large area disaster etc., this system is unaffected because an original wireless infrastructure is used.Result, this system is useful as the telemedicine network system in the disaster emergency medical treatment.