System and method for catheter placement in blood vessels of a human patient
Large bore catheter having flexible tip construction
Localized heat applying medical device
Arterial catheter means
Reinforced balloon dilatation catheter with slitted exchange sleeve and method
ApplicationNo. 204802 filed on 03/02/1994
US Classes:604/102.02, Lumen extending from aperture proximal of inflated means to distal end604/525, Providing varying degrees of flexibility along longitudinal axis604/528, With means to advance or steer catheter, excluding remotely controlled devices604/913, DILATORS MADE OF SWELLABLE MATERIAL [A61M 29/02]606/194Inserted in vascular system
ExaminersPrimary: Yasko, John D.
Assistant: Cermak, Adam J.
Attorney, Agent or Firm
Foreign Patent References
International ClassesA61M 029/02
AbstractAn over-the-wire balloon dilatation catheter has a stainless steel hypotube catheter shaft, an intermediate sleeve section bonded to the shaft and a distal balloon section connected to the sleeve section. The sleeve section is formed from relatively flexible polymer materials and includes an inner core tube which defines a guide wire lumen extending only through a distal portion of the catheter (including its sleeve and balloon sections) to facilitate fast balloon catheter exchanges. A distal end of the hypotube shaft is crimped laterally and the core tube is nested and bonded within the crimp to provide a proximal outlet for the guide wire lumen. The hypotube shaft provides an inflation lumen for the balloon, with the inflation lumen being continued as an annular inflation lumen through the sleeve section where an outer sleeve is bonded about the core tube and extends from the distal end of the hypotube shaft to the balloon section. A kink-resistant coil structure extends distally from the distal end of the hypotube shaft to provide a gradual change in stiffness along the length of the catheter from the relatively stiff hypotube shaft to the relatively flexible distal portion of the catheter.