Couplers and assemblies thereof for rapidly insertable central catheters
Disclosed herein are couplers and assemblies thereof for rapidly insertable central catheters (“RICCs”). For example, a coupler assembly can include an introducer needle and a coupler coupled together. The introducer needle can include a needle hub over both a needle shaft and a sheath over the needle shaft. The needle shaft can include a longitudinal needle slot extending through a distal needle tip. The sheath can seal the needle slot thereunder except for the needle slot under a sheath opening in a proximal portion of the sheath. The needle hub can include a needle-hub clip. The coupler can include a coupler housing and an extension arm connected to the coupler housing. The needle-hub clip can be clipped onto the coupler housing in at least a ready-to-deploy state of the coupler assembly. The extension arm can be configured for attaching a proximal end of an access guidewire thereto.
1 . A rapidly insertable central catheter (“RICC”) insertion assembly, comprising:
a RICC;
an introducer needle including:
a needle shaft including a longitudinal needle slot extending from a proximal portion of the needle shaft through a distal needle tip;
a sheath over the needle shaft sealing the needle slot thereunder except for a portion of the needle slot under a sheath opening in a proximal portion of the sheath; and
a needle hub over the proximal portion of the needle shaft and the proximal portion of the sheath;
an access guidewire including:
a proximal portion including a proximal end; and
a distal portion including a distal end disposed in the introducer needle just proximal of the distal needle tip in at least a ready-to-deploy state of the RICC insertion assembly; and
a coupler coupling the RICC, the introducer needle, and the access guidewire together, the coupler including:
a coupler housing onto which a securing means for securing the needle hub to the coupler housing secures the needle hub to the coupler housing in at least the ready-to-deploy state of the RICC insertion assembly, wherein the securing means for securing the needle hub to the coupler housing is a needle-hub clip, the needle-hub clip clipped onto the coupler housing in at least the ready-to-deploy state of the RICC insertion assembly; and
and an extension arm connected to the coupler housing to which extension arm the proximal end of the access guidewire is attached, the extension arm terminating with an extension-arm clip configured as a socket into which a proximal end of a Luer connector of the RICC is inserted to clip the extension-arm clip onto the Luer connector, and the proximal end and the distal end of the access guidewire enforcing a loop in the access guidewire over which the RICC is disposed in at least the ready-to-deploy state of the RICC insertion assembly.
2 . The RICC insertion assembly according to claim 1 , wherein the needle-hub clip is integral with the needle hub.
3 . The RICC insertion assembly according to claim 1 , wherein the needle-hub clip includes a single levered clip arm distally extending over the needle hub from a fulcrum connecting the single levered clip arm to a remainder of the needle hub, the single levered clip arm including a protrusion extending from a distal portion thereof configured to engage with a recess in a corresponding side of the coupler housing when the single levered clip arm is clipped onto the coupler housing and disengage from the recess when a proximal portion of the single levered clip arm is pressed in toward a centerline of the needle hub.
4 . The RICC insertion assembly according to claim 1 , wherein the needle-hub clip includes a pair of levered clip arms distally extending over opposite sides of the needle hub from a corresponding pair of fulcrums connecting the pair of single levered clip arms to a remainder of the needle hub, each clip arm of the pair of clip arms including a protrusion extending from a distal portion thereof configured to engage with a recess in a corresponding side of the coupler housing to clip the needle hub onto the coupler housing and disengage from the recess when a proximal portion of the clip arm is pressed in toward a centerline of the needle hub.
5 . The RICC insertion assembly according to claim 1 , wherein the coupler housing includes a longitudinal coupler-housing slot in a side of the coupler housing opposite the extension arm, opening in a same direction as the needle slot of the needle shaft, the coupler-housing slot configured to allow the access guidewire to escape from the coupler housing during withdrawal of the introducer needle from the coupler by the needle hub.
6 . The RICC insertion assembly according to claim 5 , wherein the coupler housing includes a thumb depression in the side of the coupler housing including the coupler-housing slot, the thumb depression configured for pressing the access guidewire therein with a thumb to hold the access guidewire in place during at least a percutaneous puncture with the introducer needle or withdrawal of the introducer needle from the coupler by the needle hub.
7 . The RICC insertion assembly according to claim 6 , wherein the coupler-housing slot partially extends into the thumb depression such that the distal portion of the access guidewire extends into the thumb depression in at least the ready-to-deploy state of the RICC insertion assembly.
8 . The RICC insertion assembly according to claim 6 , wherein a surface of the thumb depression is textured.
9 . The RICC insertion assembly according to claim 6 , wherein the coupler housing includes a finger depression in a side of the coupler housing opposite the thumb depression, the finger depression configured for cradling the RICC insertion assembly thereby with a finger while pressing the access guidewire into the thumb depression with the thumb during at least the percutaneous puncture with the introducer needle or withdrawal of the introducer needle from the coupler by the needle hub.
10 . The RICC insertion assembly according to claim 1 , wherein the extension arm is integral with the coupler housing.
11 . The RICC insertion assembly according to claim 1 , wherein the extension-arm clip is clipped onto the Luer connector of the RICC in at least the ready-to-deploy state of the RICC insertion assembly, the proximal portion of the access guidewire extending from the Luer connector, through a center of the extension-arm clip, and to a guidewire attachment point of the extension arm to which the proximal end of the access guidewire is attached.
12 . The RICC insertion assembly according to claim 11 , wherein the extension arm includes an extension-arm opening through opposite sides of the extension arm between the extension-arm clip and a connecting portion of the extension arm connecting the extension arm to a remainder of the coupler housing, the extension-arm opening configured to provide a window through which the access guidewire is visualized for confirmation that the access guidewire is attached to the guidewire attachment point of the extension arm.
13 . The RICC insertion assembly according to claim 1 , wherein the coupler housing includes a needle-hub receptacle in a proximal portion of the coupler housing into which needle-hub receptacle a distal portion of the needle hub is inserted in at least the ready-to-deploy state of the RICC insertion assembly.
14 . The RICC insertion assembly according to claim 1 , the coupler further including a valve module disposed in a valve-module compartment of the coupler housing sealing around the proximal portion of the sheath and the distal portion of the access guidewire that extends through the sheath opening in at least the ready-to-deploy state of the RICC insertion assembly, thereby enabling leak-free aspiration through the introducer needle.
15 . The RICC insertion assembly according to claim 14 , wherein the valve module includes an integrated blade disposed in the needle slot under a distal end of the sheath opening, the integrated blade including a distal-facing blade edge configured to cut the sheath off the needle shaft during withdrawal of the introducer needle from the coupler by the needle hub, thereby allowing the access guidewire to escape from the needle shaft by way of the needle slot thereof.
16 . The RICC insertion assembly according to claim 1 , further comprising a syringe fluidly coupled to the introducer needle in at least the ready-to-deploy state of the RICC insertion assembly.
17 . A coupler assembly for a rapidly insertable central catheter (“RICC”) insertion assembly, comprising:
an introducer needle including:
a needle shaft including a longitudinal needle slot extending from a proximal portion of the needle shaft through a distal needle tip;
a sheath over the needle shaft sealing the needle slot thereunder except for a portion of the needle slot under a sheath opening in a proximal portion of the sheath; and
a needle hub over the proximal portion of the needle shaft and the proximal portion of the sheath, the needle hub including a needle-hub clip; and
a coupler coupled together with the introducer needle, the coupler including:
a coupler housing onto which the needle-hub clip is clipped in at least a ready-to-deploy state of the coupler assembly; and
an extension arm connected to the coupler housing, the extension arm configured for attaching a proximal end of an access guidewire thereto, and the extension arm terminating with an extension-arm clip configured as a socket into which a proximal end of a Luer connector of the RICC insertion assembly is inserted to clip the extension-arm clip onto the Luer connector.
18 . The coupler assembly according to claim 17 , wherein the needle-hub clip includes a pair of levered clip arms distally extending over opposite sides of the needle hub from a corresponding pair of fulcrums connecting the levered clip arms to a remainder of the needle hub, each clip arm of the pair of clip arms including a protrusion extending from a distal portion thereof configured to engage with a recess in a corresponding side of the coupler housing to clip the needle hub onto the coupler housing and disengage from the recess when a proximal portion of the clip arm is pressed in toward a centerline of the needle hub.
19 . The coupler assembly according to claim 17 , wherein the coupler housing includes a longitudinal coupler-housing slot in a side of the coupler housing opposite the extension arm, opening in a same direction as the needle slot of the needle shaft, the coupler-housing slot configured to allow the access guidewire to escape from the coupler housing when the access guidewire is disposed therein.
20 . The coupler assembly according to claim 19 , wherein the coupler housing includes a thumb depression in the side of the coupler housing including the coupler-housing slot such that the coupler-housing slot partially extends into the thumb depression, the thumb depression configured for pressing the access guidewire therein with a thumb to hold the access guidewire in place when the access guidewire is disposed in the coupler housing.
21 . The coupler assembly according to claim 20 , wherein the coupler housing includes a finger depression in a side of the coupler housing opposite the thumb depression, the finger depression configured for cradling the coupler assembly thereby with a finger while pressing the access guidewire into the thumb depression with the thumb when the access guidewire is disposed in the coupler housing.
22 . The coupler assembly according to claim 17 , wherein the extension arm includes an extension-arm opening through opposite sides of the extension arm between the extension-arm clip and a connecting portion of the extension arm connecting the extension arm to a remainder of the coupler housing, the extension-arm opening configured to provide a window through which the access guidewire is visualized for confirmation that the access guidewire is attached to a guidewire attachment point of the extension arm when the access guidewire should be attached thereto.
23 . The coupler assembly according to claim 17 , wherein the coupler housing includes a needle-hub receptacle in a proximal portion of the coupler housing into which a distal portion of the needle hub is inserted in at least the ready-to-deploy state of the coupler assembly.
24 . The coupler assembly according to claim 17 , the coupler further including a valve module disposed in a valve-module compartment of the coupler housing sealing around the proximal portion of the sheath and the access guidewire when the access guidewire extends through the sheath opening, thereby enabling leak-free aspiration through the introducer needle.
25 . The coupler assembly according to claim 24 , wherein the valve module includes an integrated blade disposed in the needle slot under a distal end of the sheath opening, the integrated blade including a distal-facing blade edge configured to cut the sheath off the needle shaft during withdrawal of the introducer needle from the coupler by the needle hub.