VASCULAR ACCESS
First Claim
Patent Images
1. A device comprising:
- a hollow needle defining a side hole and having;
a bore so sized as to receive a guidewire; and
a sharpened distal tip distal to the side hole;
a dilator coaxially mounted on the needle thereby defining a first space between the dilator and needle, the first space communicating with the hollow needle bore through the side hole so that a fluid, if any, exiting the side hole may flow to the first space; and
a sheath coaxially mounted on the dilator;
wherein;
at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that fluid, if any, inside the device, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a cavity containing the fluid;
the dilator is slideably displaceable relative to the sheath; and
the dilator includes a proximal portion and a distal portion, the distal portion having a larger cross-sectional area than the proximal portion.
2 Assignments
0 Petitions
Accused Products
Abstract
A device may include a hollow needle, a dilator mounted coaxially on the needle, and a sheath mounted coaxially on the dilator. The dilator may be slideably displaceable relative to the sheath.
232 Citations
27 Claims
-
1. A device comprising:
-
a hollow needle defining a side hole and having; a bore so sized as to receive a guidewire; and a sharpened distal tip distal to the side hole; a dilator coaxially mounted on the needle thereby defining a first space between the dilator and needle, the first space communicating with the hollow needle bore through the side hole so that a fluid, if any, exiting the side hole may flow to the first space; and a sheath coaxially mounted on the dilator; wherein; at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that fluid, if any, inside the device, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a cavity containing the fluid; the dilator is slideably displaceable relative to the sheath; and the dilator includes a proximal portion and a distal portion, the distal portion having a larger cross-sectional area than the proximal portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. (canceled)
-
9. A device comprising:
-
a hollow needle defining a side hole and having; a bore so sized as to receive a guidewire; and a sharpened distal tip distal to the side hole; a needle hub attached to a proximal end of the needle and defining a lumen sized and positioned to receive a guidewire; a dilator coaxially mounted on the needle thereby defining a first space between the dilator and needle, the first space communicating with the hollow needle bore through the side hole so that a fluid, if any, exiting the side hole may flow to the first space; and a sheath coaxially mounted on the dilator; wherein; at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that fluid, if any, inside the device, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a cavity containing the fluid; the dilator is slideably displaceable relative to the sheath; and wherein the needle hub is transitionable between a first state in which the lumen is so patent as to allow the guidewire to slide freely through the needle hub and a second state in which the lumen is so obstructed as to clamp the guidewire in the needle hub. - View Dependent Claims (10, 11, 12, 13)
-
-
14. A device comprising:
-
a hollow needle defining a side hole and having; a bore so sized as to receive a guidewire; and a sharpened distal tip distal to the side hole; a guidewire having a distal end and being so preloaded that the guidewire distal end terminates proximal to the needle side hole and does not obstruct the needle side hole; a dilator coaxially mounted on the needle thereby defining a first space between the dilator and needle, the first space communicating with the hollow needle bore through the side hole so that a fluid, if any, exiting the side hole may flow to the first space; and a sheath coaxially mounted on the dilator; wherein; at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that fluid, if any, inside the device, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a cavity containing the fluid; and the dilator is slideably displaceable relative to the sheath. - View Dependent Claims (15, 16, 17, 19, 20, 21)
-
-
18. A device comprising:
-
a hollow needle defining a side hole and having; a bore so sized as to receive a guidewire; and a sharpened distal tip distal to the side hole; a pressure gauge in fluid communication with the needle side hole; a dilator coaxially mounted on the needle thereby defining a first space between the dilator and needle, the first space communicating with the hollow needle bore through the side hole so that a fluid, if any, exiting the side hole may flow to the first space; and a sheath coaxially mounted on the dilator; wherein; at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that fluid, if any, inside the device, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a cavity containing the fluid; and the dilator is slideably displaceable relative to the sheath.
-
-
22. A method comprising:
-
providing a device comprising; a hollow needle defining a side hole and having; a bore so sized as to receive a guidewire; and a sharpened distal tip distal to the side hole; a guidewire having a distal end and being so preloaded that the guidewire distal end terminates proximal to the needle side hole and does not obstruct the needle side hole; a dilator coaxially mounted on the needle thereby defining a first space between the dilator and needle, the first space communicating with the hollow needle bore through the side hole so that a fluid, if any, exiting the side hole may flow to the first space; and a sheath coaxially mounted on the dilator; wherein; at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that fluid, if any, inside the device, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a cavity containing the fluid; and the dilator is slideably displaceable relative to the sheath; introducing the distal tip of the hollow needle into a cavity; advancing the guidewire through the distal tip of the needle into the cavity; advancing the dilator and sheath together over the needle into the cavity; and removing the needle and the dilator, thereby leaving the sheath in place to provide access to the cavity. - View Dependent Claims (23, 24, 25, 26)
-
-
27. (canceled)
Specification