|
CARTO is a brand-name medical system used in cardiac electrophysiology. It is produced by Biosense-Webster, a subsidiary of Johnson & Johnson.〔(The Hindu )〕〔(Denver Post )〕 Their main product is the CARTO 3 EP navigation system, which is designed to visualise the real-time calculated position and orientation of a specialised RF ablation catheter within the patient’s heart. The goal of this technology is to minimise radiation exposure during fluoroscopy, increase the accuracy of targeted RF ablation and reacquisition of pacing sites for re-ablation.〔Kistler P, Ho S, Rajappan K, et al 2007, ‘Electrophysiologic and Anatomic Characterization of Sites Resistant to Electrical Isolation During Circumferential Pulmonary Vein Ablation for Atrial Fibrillation: A Prospective Study’, Journal of Cardiovascular Electrophysiology, vol. 18, no. 12 (2007) pp. 1282-1288〕〔Jais P, Weerasooriya R, Shah D, et al 2001, ‘Ablation therapy for atrial fibrillation (AF): Past, Present and Future’, Cardiovascular Research, vol. 54 (2002) pp.337-346 〕 ==System Operation== The CARTO navigation system calculates the position and orientation of the catheter tip, using three known magnetic sources as references.〔Calkins H, Jais P, Steinberg J 2008, A Practical Approach to Catheter Ablation of Atrial Fibrillation, Illustrated 1st Edn, Lippincott Williams & Wilkins, pp 82-117〕 The CARTO system uses static magnetic fields that are calibrated and computer controlled. Due to the nature of magnetic fields, the orientation may also be calculated while the tip is stationary. By calculating the strength and orientation of the magnetic fields at a given location, the x,y,z position may be calculated along with the roll, pitch, yaw orientation. The system is typically described anecdotally as similar to the GPS unit in a car, and it operates on several of the same principles. The GPS satellite network operates by transmitting the location and reference time on each satellite via a radio signal, allowing the user's GPS device to triangulate its position from multiple satellites. An inherent limitation is that neither system can determine the orientation unless the user is moving. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「CARTO」の詳細全文を読む スポンサード リンク
|