1. Field of the Invention
The present invention generally relates to a medical device and method for deploying multiple wire guides percutaneously into a blood vessel.
2. Description of Related Art
The Seldinger technique has been used successfully for many years to introduce wire guides percutaneously into a blood or other vessel of humans and animals. The technique is popular because minimal trauma is introduced to the surrounding tissue. According to the technique, a needle is introduced into a vessel. A straightened wire guide is inserted into the vessel through the needle. After the wire guide is advanced into the vessel, the needle may be removed over the wire guide and the wire guide secured to limit further advancement into the vessel. Subsequently, a dilator may be advanced over the wire into the insertion point to open up the site and facilitate introduction of other medical devices, such as catheters. Two wire guides may be implemented adjacent to each other in some procedures. In such instances, the secondary wire guide is typically introduced after the first and then advanced to the same destination. Each wire guide may have different characteristics and is advanced separately through the vasculature to the region of interest. For example, the secondary wire guide may be stiffer than the first. Individually advancing each wire guide through tortuous vessels can be time consuming and introduce additional trauma to the vessel.
In view of the above, it is apparent that there exists a need for a medical device and improved method for sequentially deploying multiple wire guides in adjacent relationship.
In satisfying the above need, as well as overcoming the enumerated drawbacks and other limitations of the related art, the present invention provides a medical device and improved method for deploying multiple wire guides.
The medical device includes a secondary wire guide and an advancement device. The advancement device has a tubular portion with a distal opening and a proximal opening. An edge region of the tubular portion forms the distal opening. A primary wire guide extends through the tubular portion. The secondary wire guide also extends into the tubular portion and has a distal portion configured to engage the edge region of the tubular portion. Accordingly, the secondary wire guide is advanced as the advancement device is translated into the blood vessel.
In another aspect of the present invention, the distal portion of the guide tubular body engages the tip of the secondary wire guide. In addition, a width of the distal portion is greater than a width of the distal opening less the diameter of the primary wire guide. Alternatively, the width of the distal portion may be simply greater than the width of the distal opening.
In another aspect of the present invention, the advancement device includes a handle portion that extends proximally from the tubular portion. Further, the handle portion of the advancement device has a unique marker with respect to the primary wire guide and the secondary wire guide. Further, the unique marker may include a color absent from the primary and secondary wire guide, or the unique marker may be a tactile marker.
In another aspect of the present invention, the secondary wire guide may be attached to the advancement device through a melt bond or adhesive.
Further objects, features and advantages of this invention will become readily apparent to persons skilled in the art after a review of the following description, with reference to the drawings and claims that are appended to and form a part of this specification.
Referring now to
In the embodiment shown, the primary wire guide 12 is generally quite flexible and is introduced percutaneously into a blood or other vessel, for example a biliary tract, urinary tract, gastrointestinal tract, airway, etc. The primary wire guide 12 extends through the advancement device 16. The secondary wire guide 14 also extends through the advancement device 16 and generally is advanced to the same region of interest as the primary wire guide 12. The advancement device 16 has a tubular portion 17. The tubular portion 17 includes a proximal opening 18 and a distal opening 20. An edge portion 22 of the advancement device 16 forms the distal opening 20. The secondary wire guide 14 extends into the distal opening 20 through the tubular portion 17 and out of the proximal opening 18. A distal portion 24, shown as the tip of the secondary wire guide 14, is configured to engage the edge portion 22 of the advancement device 16. To aid during advancement of the secondary wire guide 14, the distal portion 24 may be made of a radiopaque material, or the tubular portion 17 may be made of a radiopaque material, or the edge portion 22 may be made of a radiopaque material, or any combination of these. Accordingly, as the advancement device 16 is advanced over the primary wire guide 12, the distal portion 24 will engage the advancement device 16 thereby advancing the secondary wire guide 14 therewith. Further, a guiding catheter 28 may be provided to facilitate translation of the advancement device 16 which reduces trauma to the blood or other vessel 30. To facilitate manipulation of the advancement device 16, a handle portion 26 extends from the tubular portion 17 and is accessible external the blood or other vessel 30 to allow manipulation by the clinician.
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To facilitate engagement of the distal portion 24 of the secondary wire guide 14 with the advancement device 16, the distal portion 24 may have a width greater than the width of the distal opening 20 of the advancement device 16 as shown in
Now referring to
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Also shown in
Alternatively, in another embodiment shown in
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As a person skilled in the art will readily appreciate, the above description is meant as an illustration of implementation of the principles this invention. This description is not intended to limit the scope or application of this invention in that the invention is susceptible to modification, variation and change, without departing from the spirit of this invention, as defined in the following claims.
This application claims the benefit of U.S. provisional application 60/695,495, filed Jun. 30, 2005.
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