BUMPED DILATOR TIP

摘要

The disclosure provides a dilator with a tip that has a bump, an assembly comprising the dilator and a sheath, and methods of use, where the bump on the tip is configured to reduce or minimize damage to the sheath, and to prevent trauma to a patient during insertion or removal.

主权项

1. A dilator-sheath in combination comprising:
an elongate tubular sheath, wherein the sheath comprises a sheath body, a sheath proximal end, and a sheath distal tip or end, wherein the sheath body has an inner or lumenal radius and the distal sheath tip has an inner or lumenal radius, wherein the sheath proximal end comprises a sheath housing with an aperture; said dilator-sheath combination further comprising a dilator having an elongate dilator shaft including a proximal end and a distal tip, wherein the dilator has a dilator hub at its proximal end, wherein the distal tip of the dilator comprises a radially enlarged dilation member (dilator bump), wherein the dilator bump comprises a proximal taper that increases in radius when moving from the proximal to distal direction, and wherein dilator bump also comprises a distal taper that decreases radius when moving from the proximal to distal direction, where dilator-sheath has longitudinal axis, and radius is measurable from longitudinal axis, wherein the dilator bump has a maximal radius, as measurable at a point between the proximal taper and the distal taper, wherein the dilator bump is capable of being passed through the elongate tubular sheath.