发明名称 Steerable guidewire with soft adjustable tip.
摘要 <p>A steerable guidewire for guiding a catheter includes an elongate hollow shaft (20) having a distal core wire (32) mounted at its distal end. The distal core wire (32) tapers in a distal direction and has a flexible distal tip (40). The core wire (32) is received within a helical coil (24) mounted to the distal end of the guidewire, the distal tip (40) of the core wire (32) being attached to the distal tip (36) of the helical coil (24). A pull wire (44) extends the length of the guidewire through the hollow shaft (20) and the helical coil (24) and is connected, eccentrically, to the distal tip (36) of the helical coil (24) by a small diameter internal spring (50), the proximal end of which is attached to the distal end (52) of the pull wire (44) and the distal end of which is attached to the distal end (36) of the helical coil (24). Pulling on the pull wire (44) causes the distal tip of the guidewire to assume a curved configuration. The resilience of the internal spring (50), however, permits the distal tip of the guidewire to assume a more straightened configuration even while the pull wire (44) is tensioned whereby the distal tip of the guidewire may yield to conform to irregularities in a patient's vasculature.</p>
申请公布号 EP0377269(A1) 申请公布日期 1990.07.11
申请号 EP19890307555 申请日期 1989.07.25
申请人 C.R. BARD, INC. 发明人 PALERMO, THOMAS J.
分类号 A61M25/01;A61B6/00;A61M25/00;A61M25/09 主分类号 A61M25/01
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