Catheter and support cannula assembly

摘要

A system includes a catheter (100) and a support cannula (200) within the catheter. The catheter includes a tapered tip (122) and a body (124) extending proximally therefrom. The catheter tip may have a smaller inner diameter than the catheter body. The support cannula includes a tip disposed within the catheter tip such that the support cannula tip does not extend distally beyond the catheter distal end and a support segment extending proximally from the support cannula tip and disposed within the catheter body such that the catheter body remains in a non-stretched configuration. An outer diameter of the cannula tip may correspond to the inner diameter of the catheter tip. An outer diameter of the support segment may correspond to the inner diameter of the catheter body. The support segment may extend proximally to at least a proximal end of a perforated segment of the catheter body.