Grooved catheter with recessed flushing hole

Medical devices and methods of using the same are disclosed. The medical device may include an elongate catheter body defining a longitudinal axis and a distal tip electrode coupled to a distal end of the elongate catheter body. The distal tip electrode may have an outer surface, a cavity, a proximal end, a distal end, and a wall having a plurality of apertures connecting the outer surface and the cavity, where the apertures are arranged in a grid. A wall of the distal tip electrode may have a plurality of longitudinal grooves and a plurality of circumferential grooves formed in the wall such that each longitudinal groove extends substantially parallel to the longitudinal axis and has at least two apertures positioned with the respective longitudinal groove, and each circumferential groove intersects at least one of the longitudinal grooves, to define an aperture at such an intersection. 本发明公开了医疗装置及其使用方法。该医疗装置可包括限定纵向轴线的细长导管主体和联接到该细长导管主体的远侧端部的远侧尖端电极。该远侧尖端电极可具有外表面、腔体、近侧端部、远侧端部和壁，该壁具有连接外表面和腔体的多个孔口，其中孔口以网格的形式布置。远