SAFETY FEATURES FOR USE IN MEDICAL DEVICES

A therapy system for applying an electrical signal to an internal anatomical feature of a patient includes an implantable component and an external component. The medical device can be checked for safety issues by periodically initiating a sequence of tests of an H-bridge circuit, and, during each test, monitoring a current flow through a sensing resistor electrically connected between a sensing connection of the H-bridge circuit and a ground. Current flow through the sensing resistor indicates that both series electrical switches within at least one of the two pairs of series electrical switches are active during that test. 将电信号施加于患者的内部解剖学特征部位的治疗系统包括可植入部件和外部组件。通过周期性地启动H-桥电路的系列测试，以及在每次测试期间，监视流过电连接在H-桥电路的感测连接件与地之间的感测电阻器的电流可以对医疗设备作安全性检验。流过感测电阻器的电流指示两对串联电开关的至少对内的两个串联电开关在那种测试期间是有效的。