The wireless implantable/intracavity micromanometer (WIMM) system was designed to fulfill the unmet need for a chronic bladder pressure sensing device in urological fields such as urodynamics for diagnosis and neuromodulation for bladder control. Neuromodulation in particular would benefit from a wireless bladder pressure sensor which could provide real-time pressure feedback to an implanted stimulator, resulting in greater bladder capacity while using less power. The WIMM uses custom integrated circuitry, a MEMS transducer, and a wireless antenna to transmit pressure telemetry at a rate of 10 Hz. Aggressive power management techniques yield an average current draw of 9 μ A from a 3.6-Volt micro-battery, which minimizes the implant size. Automatic pressure offset cancellation circuits maximize the sensing dynamic range to account for drifting pressure offset due to environmental factors, and a custom telemetry protocol allows transmission with minimum overhead. Wireless operation of the WIMM has demonstrated that the external receiver can receive the telemetry packets, and the low power consumption allows for at least 24 hours of operation with a 4-hour wireless recharge session.

中文翻译：

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用于慢性膀胱压力监测的无线、超低功耗植入式传感器

无线植入式/腔内微压计 (WIMM) 系统旨在满足泌尿科领域对慢性膀胱压力传感设备的未满足需求，例如用于诊断的尿动力学和用于膀胱控制的神经调节。特别是神经调节将受益于无线膀胱压力传感器，该传感器可以向植入的刺激器提供实时压力反馈，从而在使用更少功率的同时获得更大的膀胱容量。WIMM 使用定制集成电路、MEMS 传感器和无线天线以 10 Hz 的速率传输压力遥测。积极的电源管理技术产生的平均电流消耗为 9μA 来自 3.6 伏微型电池，可最大限度地减小植入物尺寸。自动压力偏移消除电路最大限度地提高传感动态范围，以解决由于环境因素引起的漂移压力偏移，并且自定义遥测协议允许以最小开销进行传输。WIMM 的无线操作已经证明外部接收器可以接收遥测数据包，并且低功耗允许至少 24 小时的操作和 4 小时的无线充电会话。