Vascular access device
First Claim
Patent Images
1. A preassembled vascular access device, the device comprising:
- a hollow needle having a bore and a sharpened distal tip and defining a side hole proximal to the distal tip;
a guidewire preloaded in the needle;
a dilator coaxially mounted on the needle thereby defining a first annular space between the dilator and needle, the first annular space communicating with the hollow needle bore through the side hole so that blood, if any, exiting the side hole may flow to the first annular space; and
a sheath coaxially mounted on the dilator thereby defining a second annular space between the sheath and the dilator or between the sheath and the needle;
wherein at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that blood, if any, in at least one of the annular spaces, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a blood vessel; and
wherein the dilator is slideably displaceable relative to the sheath.
2 Assignments
0 Petitions
Accused Products
Abstract
A vascular access system comprises a needle having a distal tip and a proximal fitting section and a dilator having a solid distal section connected to a solid proximal section and an annular recess therebetween, the dilator having a passageway so that the dilator is coaxially positioned around the needle. The needle has at least one opening positioned proximal to its distal tip so that, when the distal end of the needle enters a blood vessel, blood enters the annular recess to show the operator that access has been achieved. Optionally, a sheath having a distal tip, a proximal fitting section, and a lumen sufficient to coaxially fit over the dilator.
-
Citations
36 Claims
-
1. A preassembled vascular access device, the device comprising:
-
a hollow needle having a bore and a sharpened distal tip and defining a side hole proximal to the distal tip; a guidewire preloaded in the needle; a dilator coaxially mounted on the needle thereby defining a first annular space between the dilator and needle, the first annular space communicating with the hollow needle bore through the side hole so that blood, if any, exiting the side hole may flow to the first annular space; and a sheath coaxially mounted on the dilator thereby defining a second annular space between the sheath and the dilator or between the sheath and the needle; wherein at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that blood, if any, in at least one of the annular spaces, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a blood vessel; and wherein the dilator is slideably displaceable relative to the sheath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A method of gaining access to a patient'"'"'s blood vessel, comprising:
-
providing a preassembled vascular access device, the device comprising; a hollow needle having a bore and a sharpened distal tip and defining a side hole proximal to the distal tip; a guidewire preloaded in the needle; a dilator coaxially mounted on the needle thereby defining a first annular space between the dilator and needle, the first annular space communicating with the hollow needle bore through the side hole so that blood, if any, exiting the side hole may flow to the first annular space; and a sheath coaxially mounted on the dilator thereby defining a second annular space between the sheath and the dilator or between the sheath and the needle; introducing the distal tip of the hollow needle into the patient'"'"'s blood vessel; threading the preloaded guidewire though the distal tip of the needle into the blood vessel; advancing the dilator and sheath together over the needle into the blood vessel; and removing the guidewire, the needle, and the dilator, thereby leaving the sheath in place to provide access to the patient'"'"'s blood vessel. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
-
-
36. A preassembled vascular access device, the device comprising:
-
a hollow needle having a bore and a sharpened distal tip and defining a side hole proximal to the distal tip; a guidewire preloaded in the needle; a dilator coaxially mounted on the needle thereby defining a first annular space between the dilator and needle, the first annular space communicating with the hollow needle bore through the side hole so that blood, if any, exiting the side hole may flow to the first annular space, the dilator comprising a distal dilation section having a double cone configuration; and a sheath coaxially mounted on the dilator thereby defining a second annular space between the sheath and the dilator or between the sheath and the needle; wherein at least one of the dilator and sheath is clear, semi-opaque, or translucent, so that blood, if any, in at least one of the annular spaces, may be visualized through the dilator and/or sheath to confirm proper placement of the needle in a blood vessel.
-
Specification