Abstract:

BACKGROUND: To date, the method for detecting endoleaks after endovascular abdominal aortic aneurysm stent repair include spiral computed tomography (CT) scan, artery angiography, magnetic resonance imaging, or duplex ultrasound scanning. But all the results are judged by the image indirectly and cannot examine the endoleaks directly and efficiently. The shortages exist, such as miss diagnosis, complicate to operate, high cost and another disadvantages to patients.
OBJECTIVE: To measure the pressure in cavity by using the implantable wireless invasive telemetric pressure sensor in order to diagnose the occurrence of endoleaks after endovascular abdominal aortic aneurysm stent repair
METHODS: The implantable wireless pressure detection system consisted of an invasive telemetric pressure sensor, power transmitting coil, data recorder and data processing station. The implantable wireless invasive telemetric pressure sensor could detect the blood pressure in tumor cavity. The implantable wireless invasive telemetric pressure sensor was composed of the wireless energy receiving module, the power management module, the sensor module, the signal conditioning module, the microcontroller and the radio frequency communication module.
RESULTS AND CONCLUSION: The prototype has been made and the in vitro blood test experiment has been carried out. Through the simulation test, the feasibility and effectiveness of the pressure telemetry for the wireless pressure sensors has been verified preliminary.