Guidewire with hypotube and internal insert

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C604S247000, C604S095030

Reexamination Certificate

active

06638267

ABSTRACT:

BACKGROUND OF THE INVENTION
Elongated guiding members are widely used in medical procedures. A common example are the guidewires used to locate intravascular devices such as angioplasty catheters. Since guidewires must traverse the peripheral and tortuous coronary in order to reach the desired treatment location, they must exhibit a number of important characteristics. Specifically, a guidewire should have sufficient strength and elasticity to impart suitable pushability, trackability, torqueability, flexibility and handleability.
It has proven challenging to maximize these functional characteristics while maintaining the necessary overall dimensions. One prior art guidewire design utilizes a proximal hypotube portion. Although this design offers advantages, it also suffers from certain drawbacks. Most significantly, the use of a hypotube increases the chance the guidewire will kink as it is being advanced within the vasculature or through a guiding catheter. In addition, due to the reduced cross sectional area relative to a solid wire of the same outer diameter, such hypotube guidewires generally suffer from similarly reduced torqueability.
Thus, there is a need for an elongated guiding member with a proximal hypotube portion having improved performance characteristics. Specifically, there is a need for a hypotube guidewire with enhanced pushability that reduces the chance of kinking. There is also a need for a guidewire with a proximal hypotube shaft that transmits torque more efficiently than conventional guidewires formed from a hypotube. This invention satisfies these and other needs.
SUMMARY OF THE INVENTION
The invention is directed to an elongated guiding member for medical devices such as a guidewire having an elongated proximal hypotube portion with an internal insert disposed within the interior hypotube and a relatively short solid core distal portion. The insert may be composed of metals such as stainless steel, shape memory/superelastic materials such as nickel-titanium alloys, composite materials or polymeric materials. Preferably, the solid distal core portion has a swaged or plunge ground proximal end that may be inserted into the distal end of the proximal hypotube portion. The proximal and distal core portions are secured by mechanical means or by adhesive, solder, brazing, welding or other suitable means. The proximal hypotube portion of the guiding members of the invention preferably are provide with a low friction coating.


REFERENCES:
patent: 4940062 (1990-07-01), Hampton et al.
patent: RE34466 (1993-12-01), Taylor et al.
patent: 5328472 (1994-07-01), Steinke et al.
patent: 5389087 (1995-02-01), Miraki
patent: 5480382 (1996-01-01), Hammerslag et al.
patent: 5549556 (1996-08-01), Ndondo-Lay et al.
patent: 5741429 (1998-04-01), Donadio, III et al.
patent: 5820571 (1998-10-01), Erades et al.
patent: 6027863 (2000-02-01), Donadio, III
patent: 6068623 (2000-05-01), Zadno-Azizi et al.
patent: 6217567 (2001-04-01), Zadno-Azizi et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Guidewire with hypotube and internal insert does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Guidewire with hypotube and internal insert, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Guidewire with hypotube and internal insert will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3125338

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.