Introducer components, assemblies, and methods thereof
Disclosed are introducer components, assemblies, and methods. For example, an introducer assembly can include a syringe and a needle assembly fluidly connected thereto. The needle assembly can include a needle and an access guidewire-advancement mechanism mounted on a proximal linear portion of a needle shaft of the needle. The needle shaft can include a sigmoid portion between a distal linear portion of the needle shaft and the proximal linear portion as well as a port in a transition from the sigmoid portion to the distal linear portion of the needle shaft. An access guidewire can be loaded in both the access guidewire-advancement mechanism and a needle-shaft lumen in the distal linear portion of the needle shaft in a ready-to-deploy state of the introducer assembly. In this way, the access guidewire can be immediately advanced into a blood-vessel lumen upon establishing a needle tract thereto with the needle.
1 . An introducer assembly, comprising:
a syringe;
a needle assembly fluidly connected to the syringe, the needle assembly including:
a needle including:
a needle shaft including:
a sigmoid portion between a distal linear portion and a proximal linear portion; and
a port in a transition from the sigmoid portion of the needle shaft to the distal linear portion of the needle shaft; and
a needle hub over the proximal linear portion of the needle shaft; and
an access guidewire-advancement mechanism mounted on the proximal linear portion of the needle shaft distal of the needle hub; and
an access guidewire loaded in both the access guidewire-advancement mechanism and a needle-shaft lumen in the distal linear portion of the needle shaft in a ready-to-deploy state of the introducer assembly.
2 . The introducer assembly of claim 1 , wherein the access guidewire extends along a barrel wall of the syringe, through the access guidewire-advancement mechanism, through the port in the needle shaft, and into the needle-shaft lumen in the distal linear portion of the needle shaft without appreciably bending, a distal end of the access guidewire disposed just proximal of a needle tip in the distal linear portion of the needle shaft in the ready-to-deploy state of the introducer assembly.
3 . The introducer assembly of claim 1 , wherein the access guidewire includes a ‘J’-shaped guidewire tip that assumes a straightened state in the ready-to-deploy state of the introducer assembly and a curved state when the ‘J’-shaped guidewire tip is advanced beyond a distal end of the needle shaft in a deployed state of the introducer assembly.
4 . The introducer assembly of claim 1 , wherein the access guidewire includes a bare-wire portion and a wound-wire portion proximal of the bare-wire portion, the bare-wire portion distally extending through the port in at least the ready-to-deploy state of the introducer assembly.
5 . The introducer assembly of claim 1 , wherein the access guidewire includes a proximal portion proximally extending from the access guidewire-advancement mechanism in the ready-to-deploy state of the introducer assembly, the proximal portion of the access guidewire disposed in a sterile barrier configured to maintain sterility of the access guidewire.
6 . The introducer assembly of claim 1 , wherein the port includes a valve configured to form a fluid-tight seal around the access guidewire.
7 . The introducer assembly of claim 6 , wherein the valve includes a split septum compressed in the port.
8 . The introducer assembly of claim 1 , wherein the access guidewire-advancement mechanism includes a thumbwheel device configured to advance the access guidewire when the access guidewire is pressed into a thumbwheel and the thumbwheel is rotated.
9 . The introducer assembly of claim 1 , wherein the needle hub further includes a needle-hub connector including a needle-hub bore in a proximal portion of the needle hub, a syringe tip of the syringe disposed in the needle-hub bore, thereby fluidly connecting the needle to the syringe.
10 . A needle assembly, comprising:
a needle including:
a needle shaft including:
a sigmoid portion between a distal linear portion and a proximal linear portion; and
a port in a transition from the sigmoid portion of the needle shaft to the distal linear portion of the needle shaft, wherein the port includes a valve configured to form a fluid-tight seal around an access guidewire; and
a needle hub over the proximal linear portion of the needle shaft.
11 . The needle assembly of claim 10 , further comprising an access guidewire-advancement mechanism over the proximal linear portion of the needle shaft distal of the needle hub.
12 . The needle assembly of claim 10 , wherein the valve includes a split septum compressed in the port.
13 . The needle assembly of claim 11 , wherein the access guidewire-advancement mechanism includes a thumbwheel device configured to advance the access guidewire when the access guidewire is pressed into a thumbwheel and the thumbwheel is rotated.
14 . A method for securing vascular access, comprising:
obtaining an introducer assembly, the introducer assembly including:
a syringe; and
a needle assembly fluidly connected to the syringe, the needle assembly including:
a needle having a sigmoid portion between a distal linear portion and a proximal linear portion with a port in a transition from the sigmoid portion of a needle shaft to the distal linear portion of the needle shaft; and
an access guidewire-advancement mechanism mounted on the proximal linear portion of the needle shaft, distal of a needle hub for advancing an access guidewire into a blood-vessel lumen of a patient;
establishing a needle tract from an area of skin to the blood-vessel lumen with the needle; and
advancing at least a guidewire tip of the access guidewire into the blood-vessel lumen for securing the vascular access.
15 . The method of claim 14 , further comprising adjusting the introducer assembly such that the introducer assembly is in a ready-to-deploy state thereof with the guidewire tip of the access guidewire disposed just proximal of a needle tip in the distal linear portion of the needle shaft for advancing the access guidewire into the blood-vessel lumen immediately upon establishing the needle tract.
16 . The method of claim 15 , wherein the access guidewire extends along a barrel wall of the syringe, through the access guidewire-advancement mechanism, through the port in the needle shaft, and into a needle-shaft lumen in the distal linear portion of the needle shaft without appreciably bending in the ready-to-deploy state of the introducer assembly.
17 . The method of claim 14 , wherein advancing the access guidewire into the blood-vessel lumen includes rotating a thumbwheel of the access guidewire-advancement mechanism while the access guidewire is pressed against the thumbwheel.
18 . The method of claim 14 , wherein advancing the access guidewire into the blood-vessel lumen allows the guidewire tip of the access guidewire to transition from a straightened state in the needle shaft to a curved state in the blood-vessel lumen.
19 . The method of claim 14 , further comprising withdrawing a plunger from a barrel of the syringe to create a slight vacuum before reaching the blood-vessel lumen, the slight vacuum ensuring blood flashes back into at least a syringe tip to confirm establishing the needle tract.
20 . The method of claim 14 , further comprising aspirating blood with the syringe to confirm establishing the needle tract, a valve disposed in the port configured to form a fluid-tight seal around a bare-wire portion of the access guidewire for maintaining a vacuum during aspirating of the blood with the syringe.
21 . The method of claim 14 , further comprising withdrawing the needle from the patient leaving the access guidewire in the blood-vessel lumen.
22 . The method of claim 21 , wherein withdrawing the needle includes holding the access guidewire in place at or near the area of skin including the needle tract while withdrawing the needle over a proximal portion of the access guidewire.
23 . The method of claim 21 , further comprising disconnecting the needle from the syringe before withdrawing the needle from the patient.
24 . The method of claim 21 , further comprising bleeding air into the port while withdrawing the needle from the patient by pushing the access guidewire to a side of the port, the bleeding of air into the port obviating disconnecting the needle from the syringe.