Automatic-sealing balloon-filling catheter system
Valve assemblies for use with expandable devices that are positioned within remote cavities and more particularly relates to the catheters/conduits used to inflate these devices with fluid.
1. A valve assembly for use with a balloon device having a fluid port, the valve assembly comprising:
a jacket member having an outer surface and an interior channel;
a wall anchor configured to be positioned adjacent to the fluid port, the wall anchor having an interior passage that receives the jacket member to secure a portion of the balloon device therebetween;
a conduit extending through the interior channel of the jacket member, the conduit having a fill end and a balloon end, with a fill opening located therebetween, wherein the balloon end is occluded such that fluid can pass between the fill end and the fill opening wherein a portion of the conduit and the interior channel are sized to create a sliding resistance therebetween;
the conduit having an interference region between the fill opening and the balloon end, such that when the conduit moves within the interior channel to position the interference region into the interior channel the interference region becomes secured therein and seals the valve by moving the fill opening through or out of the interior channel; and
a weakened section on the conduit and located towards the interference region, wherein a tensile strength of the weakened section permits a pulling force on the conduit to overcome the sliding resistance and move the conduit within the interior channel but causes failure of the conduit at the weakened section when the pulling force pulls the conduit subsequent to the interference region being secured in the interior channel.
2. The valve assembly of claim 1 , where the jacket member comprises an elongated cylindrical shape.
3. The valve assembly of claim 1 , where the balloon end of the conduit includes a cylindrical plug having an external shaft diameter equal to or greater than an interior diameter of the conduit.
4. The valve assembly of claim 3 , where the cylindrical plug comprises a plug head sized to prevent movement through the interior channel of the conduit.
5. The valve assembly of claim 3 , wherein the cylindrical plug comprises at least one tooth comprising a tapered shape that increases a force required to remove the plug from the conduit.
6. The valve assembly of claim 1 , wherein the conduit includes a spherical plug in the balloon end of the conduit, where an external diameter of the spherical plug is equal to or greater than an interior diameter of the conduit.
7. The valve assembly of claim 1 , wherein the interference region is adjacent to the balloon end.
8. The valve assembly of claim 1 , wherein the weakened section is located between the fill end and the interference region.
9. The valve assembly of claim 1 , where the interior channel of the jacket member includes at least one engaging element that reduces an interior diameter of the interior channel, wherein the interference region locks with the at least one engaging element to seal the interior channel of the jacket member.
10. The valve assembly of claim 1 , wherein the wall anchor comprises a flared end adjacent to the balloon device.
11. The valve assembly of claim 1 , where the conduit includes a plurality of fill openings.
12. The valve assembly of claim 1 , wherein the portion of the balloon device extending into the interior passage of the wall anchor extends to at least a length of the jacket member.
13. The valve assembly of claim 1 , wherein a proximal face of the wall anchor is adjacent to but unconnected with a wall of the balloon device.
14. The valve assembly of claim 1 , wherein a friction fit between the conduit and the interior passage of the jacket member creates a resistance between the conduit and interior passage of the jacket member that permits movement of the balloon device upon pulling the conduit.
15. A balloon device comprising:
a balloon layer defining a reservoir, the reservoir having a fluid port;
a jacket member having an outer surface and an interior channel;
a wall anchor positioned within the reservoir and adjacent to the fluid port, the wall anchor having an interior passage that receives the jacket member to secure a portion of the balloon layer therebetween;
a conduit extending through the interior channel of the jacket member, the conduit having a fill end and a balloon end, with a fill opening located therebetween, wherein the balloon end is occluded such that fluid can pass between the fill end and the fill opening wherein a portion of the conduit and the interior channel are sized to create a sliding resistance therebetween;
the conduit having an interference region between the fill opening and the balloon end and located within the reservoir, such that when the conduit moves within the interior channel to position the interference region into the interior channel the interference region becomes secured therein and seals the valve by moving the fill opening through or out of the interior channel; and
a weakened section on the conduit and located towards the interference region, wherein a tensile strength of the weakened section permits a pulling force on the conduit to overcome the sliding resistance and move the conduit within the interior channel but causes failure of the conduit at the weakened section when the pulling force pulls the conduit subsequent to the interference region being secured in the interior channel.
16. The balloon device of claim 15 , where the jacket member comprises an elongated cylindrical shape.
17. The balloon device of claim 15 , where the balloon end of the conduit includes a cylindrical plug having an external shaft diameter equal to or greater than an interior diameter of the conduit.
18. The balloon device of claim 17 , where the cylindrical plug comprises a plug head sized to prevent movement through the interior channel of the conduit.
19. The balloon device of claim 17 , wherein the cylindrical plug comprises at least one tooth comprising a tapered shape that increases a force required to remove the plug from the conduit.
20. The balloon device of claim 15 , wherein the conduit includes a spherical plug in the balloon end of the conduit, where an external diameter of the spherical plug is equal to or greater than an interior diameter of the conduit.
21. The balloon device of claim 15 , wherein the interference region is adjacent to the balloon end.
22. The balloon device of claim 15 , wherein the weakened section is located between the fill end and the interference region.
23. The balloon device of claim 15 , where the interior channel of the jacket member includes at least one engaging element that reduces an interior diameter of the interior channel, wherein the interference region locks with the at least one engaging element to seal the interior channel of the jacket member.
24. The balloon device of claim 15 , wherein the wall anchor comprises a flared end adjacent to the balloon device.
25. The balloon device of claim 15 , where the conduit includes a plurality of fill openings.
26. The balloon device of claim 15 , wherein the portion of the balloon device extending into the interior passage of the wall anchor extends to at least a length of the jacket member.
27. The balloon device of claim 15 , wherein a proximal face of the wall anchor is adjacent to but unconnected with a wall of the balloon device.
28. The balloon device of claim 15 , wherein a friction fit between the conduit and the interior passage of the jacket member creates a resistance between the conduit and interior passage of the jacket member that permits movement of the balloon device upon pulling the conduit.