Circulatory system access preservation system
First Claim
1. An access device comprising:
- (a) a cylindrical cannulation assembly, said cylindrical cannulation assembly comprising a cannulation cylinder comprising an insertion point at a first end;
(b) a cylindrical conduit assembly, said cylindrical conduit assembly comprising a cylindrical conduit and at least one alignment sleeve section to facilitate alignment of said cylindrical conduit within said cannulation cylinder and the easy sliding engagement of said cylindrical conduit within said cannulation cylinder, wherein at least one of said at least one alignment sleeve sections comprises an alignment sleeve section vent to vent air trapped in enclosed spaces between said cylindrical conduit assembly and cylindrical cannulation assembly, said cylindrical conduit telescopically positioned within said cannulation cylinder such that,(1) at a first position (to be used before and during cannulation), a first end of said cylindrical conduit, said first end being a substantially smooth right circular cylinder, is positioned a rearward distance from said insertion point to facilitate cannulation, and,(2) at a second position (to be used after cannulation), said first end of said cylindrical conduit is positioned within said cannulation cylinder substantially at or forward of said insertion point; and
(c) a locking mechanism to secure the position of said cylindrical conduit relative to said cannulation cylinder at either said first position or said second position.
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Accused Products
Abstract
An access device is disclosed that comprises two main assemblies. The first assembly is the cylindrical cannulation assembly. This is the needle-point-bearing assembly which facilitates cannulation (i.e., insertion of the assembly into the arm of the patient). The cylindrical cannulation assembly comprises a cannulation cylinder which has an insertion point (i.e., the needle puncture point) at a first end. The second main assembly of the invention is the cylindrical conduit assembly. This is the assembly that facilitates fluid flow during treatment free of the worry that the very needle which facilitated access will internally lacerate the blood vessel. The cylindrical conduit assembly comprises a cylindrical conduit which is telescopically positioned within the cannulation cylinder. The cannulation cylinder and cylindrical conduit longitudinally move relative to one another.
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Citations
12 Claims
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1. An access device comprising:
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(a) a cylindrical cannulation assembly, said cylindrical cannulation assembly comprising a cannulation cylinder comprising an insertion point at a first end; (b) a cylindrical conduit assembly, said cylindrical conduit assembly comprising a cylindrical conduit and at least one alignment sleeve section to facilitate alignment of said cylindrical conduit within said cannulation cylinder and the easy sliding engagement of said cylindrical conduit within said cannulation cylinder, wherein at least one of said at least one alignment sleeve sections comprises an alignment sleeve section vent to vent air trapped in enclosed spaces between said cylindrical conduit assembly and cylindrical cannulation assembly, said cylindrical conduit telescopically positioned within said cannulation cylinder such that, (1) at a first position (to be used before and during cannulation), a first end of said cylindrical conduit, said first end being a substantially smooth right circular cylinder, is positioned a rearward distance from said insertion point to facilitate cannulation, and, (2) at a second position (to be used after cannulation), said first end of said cylindrical conduit is positioned within said cannulation cylinder substantially at or forward of said insertion point; and (c) a locking mechanism to secure the position of said cylindrical conduit relative to said cannulation cylinder at either said first position or said second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An access device comprising:
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(a) a cylindrical cannulation assembly, said cylindrical cannulation assembly comprising a cannulation cylinder comprising an insertion point at a first end; (b) a cylindrical conduit assembly, said cylindrical conduit assembly comprising a cylindrical conduit fitted with at least one alignment sleeve section to facilitate alignment of said cylindrical conduit within said cannulation cylinder and the easy sliding engagement of said cylindrical conduit within said cannulation cylinder, said cylindrical conduit telescopically positioned within said cannulation cylinder such that, (1) at a first position (to be used before and during cannulation), a first end of said cylindrical conduit, said first end being a substantially smooth right circular cylinder, is positioned a rearward distance from said insertion point to facilitate cannulation, and, (2) at a second position (to be used after cannulation), said first end of said cylindrical conduit is positioned within said cannulation cylinder substantially at or forward of said insertion point; and (c) a locking mechanism to secure the position of said cylindrical conduit relative to said cannulation cylinder at either said first position or said second position, said locking mechanism comprising a dimple on at least one of said at least one alignment sleeve sections, and an axially aligned cannulation locking hole, axially aligned steady state locking hole, and an axially aligned but rotationally displaced translation slot on an insertion assembly gripping sleeve fitted to said cannulation cylinder, such that, at said first position, said dimple is positioned within said cannulation locking hole, and, at said second position, said dimple is positioned within said steady state locking hole wherein (d) said cylindrical cannulation assembly comprises a cylindrical seal in tight engagement with the outer surface of said cylindrical conduit and in close proximity with the end opposite said first end of said cannulation cylinder so as to prevent continuous fluid communication through the annulus defined between the outer surface of said cylindrical conduit and the inner surface defined of said cannulation cylinder. - View Dependent Claims (11, 12)
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Specification