Connector hub apparatus for catheter and methods of use
A hub assembly is provided for accommodating a medical professional to grip and manipulate two components of a catheter hub and move one component longitudinally relative to the other, then removably engaging the two components of the catheter hub to restrict movement there between. The two catheter hub components include a proximal hub and a distal hub. The proximal hub and the distal hub are configured to removably engage with one another. The proximal hub is affixed to a first catheter member, such as a multi-lumen catheter, while the distal hub is affixed to a second catheter member, such as a sheath. The first catheter member and the second catheter member are cooperatively engaged and concentric with one another. Relative movement of the proximal and distal hubs translates into relative movement of the first and second catheter members.
1. A catheter hub apparatus comprising:
a. a distal hub member coupled to a proximal end of a catheter sheath having a sheath lumen, the distal hub member comprising a body member having an inner body lumen passing through the body member, the inner body lumen of the body member being in communication with the sheath lumen, a side port defining a side-branching lumen in the distal hub member communicating with the inner body lumen, and at least one proximal hub engagement member comprising a resilient arm member projecting proximally from the body member;
b. a proximal hub member fixedly coupled to a proximal end of a catheter, the catheter being disposed and reciprocally movable within the sheath lumen, the proximal hub member comprising a housing having an inner chamber having a distal opening configured to accept the at least one proximal hub engagement member therein, and a catch opening formed through an outer wall of the proximal hub member configured to allow the at least one proximal hub engagement member to removably engage therein, thereby engaging the distal hub member with the proximal hub member and creating a removable coupling there between;
c. a core member coupled to the proximal hub member and within the inner chamber thereof, the core member comprising a generally tubular member having a central core lumen, an annular recess circumferentially positioned on the core member, a first annular taper formed at a distal end of the core member and a second annular taper intermediate the annular recess and a flange at a proximal end of the core member, wherein the proximal end of the catheter is coupled in fluid flow communication with the central core lumen;
d. a seal disposed within the distal hub member and positioned to receive the core member when the proximal hub member and distal hub member are in engagement; and
e. a hemostasis valve disposed within the distal hub member distal to the seal, the hemostasis valve being positioned to accept the catheter passing there through.
2. The catheter hub apparatus of claim 1 , wherein the resilient arm member deflects inward to pass into the proximal hub member.
3. The catheter hub apparatus of claim 2 , wherein the resilient arm member is biased radially outward and resiliently returns to its original position when engaged with the catch opening.
4. The catheter hub of claim 1 , wherein the resilient arm member has a tab configured to protrude through the aperture of the catch opening.
5. The catheter hub of claim 4 , wherein the tab is a radially-extending tab of the resilient arm member that includes an aperture in the protruding section of the radially-extending tab.
6. The catheter hub of claim 1 , wherein the central core lumen further comprises a distal section having a first diameter and a proximal section having a second diameter, wherein the second diameter is greater than the first diameter.
7. The catheter hub of claim 6 , further comprising a UV-curable resin disposed within the proximal section of the longitudinal lumen of the core member.
8. The catheter hub of claim 7 , wherein the wall of the core member is a UV-transparent material.
9. The catheter hub of claim 1 , wherein the core member is molded as an integral part of the proximal hub member.
10. The catheter hub of claim 1 , wherein the core member further comprises a first annular taper formed at the distal end of the core member and a second annular taper intermediate the annular recess and the flange is at a proximal end of the core member, and the proximal hub member has a proximal opening at a proximal end thereof that accommodates the core there through, with the flange seating the core member within the proximal opening.
11. The catheter hub of claim 1 , wherein the inner body lumen of the distal hub member further comprises a first expanded section and a second expanded section, the second expanded section includes a diameter larger than the first expanded section, wherein the hemostatis valve seats within the second expanded section of the inner body lumen.
12. The catheter hub of claim 11 , wherein the inner body lumen of the distal hub member further comprises a third expanded section configured to seat the seal.