Valve modules and methods for introducer assemblies and rapidly insertable central-catheter insertion assemblies
Rapidly insertable central-catheter (“RICC”) insertion assemblies and associated methods include valve modules. For example, a RICC insertion assembly can include a RICC, an introducer needle, and an access guidewire coupled together by a coupler in which a valve module is disposed. The introducer needle includes a needle shaft having a longitudinal needle slot and a sheath over the needle shaft sealing the needle slot thereunder except for that under a sheath opening of the sheath. The valve module includes an elastomeric gasket encircling at least a portion of a valve-module compartment of the coupler housing. In a ready-to-deploy state of the RICC insertion assembly, the gasket is compressed in the valve-module compartment around both the introducer needle and the access guidewire where the access guidewire extends from the sheath opening, thereby creating a substantially air-tight space within the gasket around the introducer needle and the access guidewire.
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; and
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;
a coupler coupling the RICC and the introducer needle together, the coupler including:
a coupler housing including a valve-module compartment; and
a valve module disposed in the valve-module compartment of the coupler housing, the valve module including:
an elastomeric gasket encircling at least a portion of the valve-module compartment of the coupler housing along a length of the valve-module compartment, the gasket in the valve-module compartment compressed around a proximal portion of the introducer needle in a ready-to-deploy state of the RICC insertion assembly to create a substantially air-tight space within the gasket around the proximal portion of the introducer needle; and
an access guidewire including:
a distal portion passing into the introducer needle through both the sheath opening of the sheath and the needle slot of the needle shaft, the gasket in the valve-module compartment also compressed around the distal portion of the access guidewire in the ready-to-deploy state of the RICC insertion assembly to create the substantially air-tight space within the gasket around the distal portion of the access guidewire; and
a distal end disposed in the introducer needle just proximal of a needle tip in a distal end of the introducer needle.
2 . The RICC insertion assembly of claim 1 , wherein the gasket is formed of a unitary piece.
3 . The RICC insertion assembly of claim 2 , wherein the gasket includes a proximal needle through-hole through a proximal-end portion of the gasket and a distal needle through-hole aligned with the proximal needle through-hole through a distal-end portion of the gasket, the proximal portion of the introducer needle passing through both the proximal needle through-hole and the distal needle through-hole in the ready-to-deploy state of the RICC insertion assembly.
4 . The RICC insertion assembly of claim 3 , wherein the gasket includes an access-guidewire channel through the proximal-end portion of the gasket, the access-guidewire channel forming an acute angle with the proximal needle through-hole, thereby directing the distal portion of the access guidewire into the proximal portion of the introducer needle through both the sheath opening of the sheath and the needle slot of the needle shaft.
5 . The RICC insertion assembly of claim 4 , wherein the access-guidewire channel is coincident with a terminal portion of a longitudinal slit through a top portion of the gasket.
6 . The RICC insertion assembly of claim 5 , wherein the access-guidewire channel has an inner diameter commensurate with an outer diameter of the access guidewire.
7 . The RICC insertion assembly of claim 5 , wherein the distal needle through-hole is coincident with a second terminal portion of the longitudinal slit through the top portion of the gasket.
8 . The RICC insertion assembly of claim 7 , wherein the distal needle through-hole has an inner diameter commensurate with an outer diameter of the introducer needle.
9 . The RICC insertion assembly of claim 5 , wherein the longitudinal slit is configured to separate and allow the access guidewire to escape from the top portion of the gasket when compression on the gasket is relieved and the introducer needle is withdrawn from the coupler.
10 . The RICC insertion assembly of claim 1 , wherein the gasket is formed of two complementary pieces of the gasket mated together.
11 . The RICC insertion assembly of claim 10 , wherein the gasket is substantially symmetric along a longitudinal plane of symmetry through a majority of the gasket, the two complementary pieces of the gasket substantially being mirror images of each other.
12 . The RICC insertion assembly of claim 10 , wherein the gasket is asymmetric, the two complementary pieces of the gasket not related to each other by any symmetry operation.
13 . The RICC insertion assembly of claim 10 , wherein the gasket includes a proximal needle through-hole through a proximal-end portion of the gasket and a distal needle through-hole aligned with the proximal needle through-hole through a distal-end portion of the gasket, each through-hole of the proximal needle through-hole and the distal needle through-hole formed between the two complementary pieces of the gasket mated together, and the proximal portion of the introducer needle passing through both the proximal needle through-hole and the distal needle through-hole in the ready-to-deploy state of the RICC insertion assembly.
14 . The RICC insertion assembly of claim 13 , wherein the gasket includes an access-guidewire channel through the proximal-end portion of the gasket, the access-guidewire channel formed between the two complementary pieces of the gasket mated together, and the access-guidewire channel forming an acute angle with the proximal needle through-hole, thereby directing the distal portion of the access guidewire into the introducer needle through both the sheath opening of the sheath and the needle slot of the needle shaft.
15 . The RICC insertion assembly of claim 10 , wherein the two complementary pieces of the gasket are configured to separate and allow the access guidewire to escape from the gasket when compression on the gasket is relieved and the introducer needle is withdrawn from the coupler.
16 . The RICC insertion assembly of claim 1 , wherein the gasket approximates a rectangle in a side-on view of the gasket.
17 . The RICC insertion assembly of claim 1 , wherein the gasket approximates a right trapezoid in a side-on view of the gasket.
18 . The RICC insertion assembly of claim 1 , the coupler further including a blade coupled to the coupler housing, the blade extending into the valve module through the gasket such that a distal facing blade edge is disposed in the needle slot of the needle shaft under a distal end of the sheath opening of the sheath for cutting the sheath off the needle shaft as the introducer needle is withdrawn from the coupler, thereby allowing the access guidewire to escape from the needle shaft through the needle slot.
19 . The RICC insertion assembly of claim 1 , wherein the coupler housing includes a longitudinal coupler-housing slot configured to allow the access guidewire to escape from the coupler housing when the introducer needle is withdrawn from the coupler.
20 . The RICC insertion assembly of claim 1 , the coupler further including a compression clip over complementary mated pieces of the coupler housing, the compression clip configured to compress the gasket in the valve-module compartment.
21 . The RICC insertion assembly of claim 1 , the coupler further including one or more lubricant wells including a lubricant, one or more lubricant receptors configured to receive or redistribute the lubricant, or a combination thereof.
22 . The RICC insertion assembly of claim 1 , further comprising:
a syringe fluidly coupled to the introducer needle in the ready-to-deploy state of the RICC insertion assembly.