| الوصف: |
Electronic biopsy sensing needle caught researchers’ interest as they cause minimal damage to patient’s viscera and vascular tissues and utilize AC voltage to measure the bioimpedance changes in pathological tissue. Researchers have studied the application of bioimpedance sensing in needle-based devices to diagnose cancer, extravasation, and neuromuscular disease. Electrical Impedance Spectroscopy and Electrochemical Impedance Spectroscopy (EIS) have been selected technique to analyse the electrical properties of bio-tissues. Biopsy sensing needles are classified into conventional needles and novel needles, differing in their structure and technique application. Conventional needles consisted of an inner element (a metal wire) and an outer element (a metal cannula), which are electrically isolated. The majority of novel needles are comprised of new sensors/electrodes on the surface of the needle shaft, with the needles being fabricated using new materials and methods. Novel techniques such as RF wirelessly powering, ultrasonic wirelessly powering, and electrolytic non-thermal ablation were researched in RF ablation. This review paper focuses on presenting the applications of electronic needles in medical diagnosis and treatment. The experiment results of pathological detection by conventional sensing needles are presented. Then, the structure, material, fabrication methods, and test results of novel sensing needles are introduced. Furthermore, novel tissue discrimination methods and novel RF ablation needles are introduced. Finally challenges and future work are discussed. |
