Catheter connection and repair system

A catheter connection system for effecting a fluid-tight coupling and a mechanical joinder between a medical device that accommodates fluid flow therethrough an end of a catheter having an outer wall with an exterior surface and an interior surface, the interior surface of the outer wall of the catheter defining a longitudinally extending fluid flow lumen therein, said connection system being capable of being manipulated by a user into an assembled condition, and said connection system comprising:

• an elongated a coupling hub including a catheter connection stem attached at the proximal end thereof to the medical device and having a distal end remote therefrom configured to be receivable in an end of the lumen of the catheter, said connection stem enclosing a fluid passageway extending between said proximal end and a distal end of the connection stem, said fluid passageway communicating with the medical device at said proximal end of said connection stem;
• wherein the connection stem further comprises a frustoconical barb formed on an exterior of said distal end of said connection stem, the outer surface of said barb enlarging radially outwardly from the distal end of said connection stem in a direction toward a shoulder of said barb, said barb terminating at said shoulder thereof in an annular barrier wall encircling said connection stem;
• and
• a catheter securement collar having an internal bore sized to receive said connection stem and to advance proximally relative to the exterior of the connection stem via coupling to the coupling hub into said assembled condition of said connection system;
• a catheter locking ring formed on the internal bore of said securement collar remote from said proximal end thereof;
• wherein the coupling hub, the securement collar and the frustoconical barb, in the assembled condition of the connection system, are structured for subjecting a portion of the outer wall of the catheter disposed between said interior surface of said locking ring and said cylindrical portion of said connection stem to a condition of maximum compression produced in the outer wall of the catheter by said connection system.

A catheter connection system for effecting a fluid-tight coupling and a mechanical joinder between a medical device that accommodates fluid flow therethrough and a free end of a catheter having an outer wall with an exterior surface and an interior surface, the interior surface of the outer wall of the catheter defining a longitudinally extending fluid flow lumen within the catheter, said connection system being capable of being manipulated by a user into an assembled condition, and said connection system comprising:

• an elongated a coupling hub including a catheter connection stem attached at the proximal end thereof to the medical device and having a distal end remote therefrom configured to be receivable in an end of the lumen of the catheter, said connection stem enclosing a fluid passageway extending between said proximal end and a distal end of the connection stem, said fluid passageway communicating with the medical device at said proximal end of said connection stem;
• a catheter securement collar having an internal bore sized to receive said connection stem and to advance proximally relative to the exterior of the connection stem via coupling to the coupling hub from said distal end thereof into said assembled condition of said connection system;
• wherein the internal bore of the securement collar includes a purchase enhancement region, the purchase enhancement region located intermediate the proximal and distal ends thereof;
• and
• wherein the internal diameter of the purchase enhancement region of the internal bore of the securement collar increases in a proximal direction longitudinally along the securement collar more rapidly than any increase in the outer diameter of the exterior of the connection stem radially adjacent the purchase enhancement region.

A catheter connection system for effecting a fluid-tight coupling and a mechanical joinder between a medical device that accommodates fluid flow therethrough and an end of a catheter having an outer wall with an exterior surface and an interior surface, the interior surface of the outer wall of the catheter defining a longitudinally extending fluid flow lumen therein, said connection system being capable of being manipulated by a user into an assembled condition, and the connection system comprising:

• a coupling hub including a catheter connection stem attached at the proximal end thereof to the medical device and having a distal end remote therefrom configured to be receivable in an end of the lumen of the catheter, said connection stem enclosing a fluid passageway extending between a proximal end and a distal end of the connection stem, said fluid passageway communicating with the medical device at said proximal end of said connection stem and with the exterior of the connection stem at a location positioned inside the lumen of the catheter when the distal end of the connection stem is received therein, the connection stem comprising:
• a first set of threads on the exterior of the proximal end of the connection stem;
• an enlargement formed on an exterior of the connection stem, the enlargement extending between a distal end and a proximal end thereof and terminating at the proximal end in a barrier wall encircling the connection stem:
• a catheter securement collar having an internal bore sized to receive said connection stem and to advance proximally relative to the exterior of the connection stem via coupling to the coupling hub into said assembled condition of said connection system, said securement collar further comprising:
• a proximal end;
• a second set of threads on said internal bore of said securement collar, said second set of threads being configured to cooperate with said first set of threads for rotatingly advancing said securement collar proximally along said exterior of said connection stem into said assembled condition of said connection system;
• and
• a distal end located at a longitudinal distance said securement collar from said second set of threads, said longitudinal distance being less than the longitudinal distance of said tip of said distal end of said connection stem from said first set of threads, in said assembled condition of said connection system said internal bore of said securement collar proximal of said distal end of said securement collar cooperating with said exterior of said connection stem to form a void encircling said connection stem interior of said connection system, said void having an enlarged closed proximal end and a smaller distal end opening to said exterior of said connection system between said distal end of said securement collar and said exterior of said connection stem;
• wherein a distal end of the securement collar, in the assembled condition of the connection system, is positioned adjacent to the barrier wall of the connection stem.

A catheter connection system for effecting a fluid-tight coupling and a mechanical joinder between a medical device that accommodates fluid flow therethrough and an end of a catheter having an outer wall with an exterior surface and an interior surface, the interior surface of the outer wall of the catheter defining a longitudinally extending fluid flow lumen therein, said connection system being capable of being manipulated by a user into an assembled condition, and said connection system comprising:

• a coupling hub including an elongated catheter connection stem attached at the proximal end thereof to the medical device and having a distal end remote therefrom configured to be receivable in the lumen of the catheter, said connection stem enclosing a fluid passageway extending between said proximal end and the tip of said distal end thereof, said fluid passageway communicating with the medical device at said proximal end of said connection stem, said connection stem comprising:
• a cylindrical portion of said connection stem proximal of said tip of said distal end of said connection stem, the outer surface of said cylindrical portion being concentrically disposed about a longitudinal axis of said connection stem;
• a first set of threads on said exterior of said connection stem adjacent to and proximal of said cylindrical portion thereof;
• an enlargement formed on the exterior of said distal end of said connection stem proximal of and adjacent to said cylindrical portion, said enlargement terminating at a proximal end thereof in a barrier wall encircling said connection stem;
• a catheter securement collar having an internal bore sized to receive said connection stem and to advance proximally relative to the exterior of the connection stem via coupling to the coupling hub into said assembled condition of said connection system, said securement collar comprising:
• a second set of threads on a portion of said internal bore of said securement collar encircling and opposing said first set of threads on said connection stem in said assembled condition of said connection system, said second set of threads being configured to cooperate with said first set of threads in rotatingly advancing said securement collar proximally along said exterior of said connection stem into said assembled condition of said connection system;
• and
• a distal end located at a longitudinal distance along said securement collar from said second set of threads, said longitudinal distance being less than the longitudinal extent of said cylindrical portion of said connection stem.

A catheter connection system for effecting a fluid-tight coupling and a mechanical joinder between a medical device that accommodates fluid flow therethrough and an end of a cardiovascular access catheter having an outer wall with an exterior surface and an interior surface, the interior surface of the outer wall of the catheter defining a longitudinally extending fluid flow lumen therein, said connection system being capable of being manipulated by a user into an assembled condition, and said connection system comprising:

• a coupling hub including a catheter connection stem attached at the proximal end thereof to the medical device and having a distal end remote therefrom configured to be receivable in an end of the lumen of the catheter, said connection stem enclosing a fluid passageway extending between said proximal end and a distal end of the connection stem, said fluid passageway communicating with the medical device at said proximal end of said connection stem;
• wherein the connection stem further comprises a barb formed on the exterior of said distal end of said connection stem, the outer surface of said barb enlarging radially outwardly from the distal end of said connection stem proximally from said tip of said distal end of said connection stem to a shoulder of said barb, said barb terminating at said shoulder thereof in a barrier wall oriented generally perpendicularly to a longitudinal axis of said connection stem, said barrier wall having a circular inner periphery and an outer periphery coincident with the radially outward limit of said shoulder of said barb;
• a catheter securement collar having an internal bore sized to receive said connection stem and to advance proximally along said exterior thereof from said distal end thereof into said assembled condition of said connection system;
• wherein the securement collar further comprises a proximal end capable of engaging said exterior of said connection stem in said assembled condition of said connection system;
• and
• wherein the coupling hub, the barb, and the securement collar, in the assembled condition of the connection system, are structured for urging a portion of the outer wall of the catheter against said outer surface of said cylindrical portion of said connection stem to create, thereat, in a portion of the outer wall of the catheter, a longitudinally uniform condition of maximum compression.

A catheter connection system for effecting a fluid-tight coupling and a mechanical joinder between a medical device that accommodates fluid flow therethrough and an end of a catheter having an outer wall with an exterior surface and an interior surface, the interior surface of the outer wall of the catheter defining a longitudinally extending fluid flow lumen therein, said connection system being capable of being manipulated by a user into an assembled condition, and said connection system comprising:

• a coupling hub including a catheter connection stem attached at the proximal end thereof to the medical device and having a distal end remote therefrom configured to be receivable in an end of the lumen of the catheter, said connection stem enclosing a fluid passageway extending between said proximal end and a distal end of the connection stem, said fluid passageway communicating with the medical device at said proximal end of said connection stem;
• wherein the connection stem further comprises a barb formed on the exterior of said distal end of said connection stem, the outer surface of said barb enlarging radially outwardly from the distal end of said connection stem proximally to a shoulder of said barb;
• and
• a catheter securement collar having an internal bore sized to receive said connection stem and to advance proximally relative to the exterior of the connection stem via coupling to the coupling hub into said assembled condition of said connection system, wherein the securement collar further comprises:
• a proximal end;
• a catheter locking ring on the interior of said securement collar remote from said proximal end thereof, said locking ring having a cylindrical interior surface, wherein a minimum radius of said interior surface is greater than a maximum radius of said barb;
• and
• a second set of threads on said internal bore of said securement collar, said second set of threads being configured to cooperate with said first set of threads in rotatingly advancing the securement collar proximally along said exterior of said connection stem into said assembled condition of said connection system;
• wherein a distal end of the securement collar, in the assembled condition of the connection system, is positioned adjacent to the barrier wall of the connection stem.

A catheter connection system for effecting a fluid-tight coupling and a mechanical joinder between a medical device that accommodates fluid flow therethrough and an end of a catheter having an outer wall with an exterior surface and an interior surface, the interior surface of the outer wall of the catheter defining a longitudinally extending fluid flow lumen therein, the connection system being capable of being manipulated by a user into an assembled condition, and the connection system comprising:

• a coupling hub including a catheter connection stem attached at the proximal end thereof to the medical device and having a distal end remote therefrom configured to be receivable in an end of the lumen of the catheter, said connection stem enclosing a fluid passageway extending between a proximal end and a distal end of the connection stem, said fluid passageway communicating with the medical device at said proximal end of said connection stem;
• an enlargement formed on an exterior of the connection stem, the enlargement extending between a distal end and a proximal end thereof and terminating at the proximal end in a barrier wall encircling the connection stem;
• and
• a catheter securement collar having an internal bore sized to receive said connection stem and to advance proximally relative to the exterior of the connection stem via coupling to the coupling hub into said assembled condition of said connection system, the securement collar comprising:
• a proximal end;
• and
• a catheter locking ring on the interior of said securement collar distal of and remote from said proximal end thereof, said locking ring comprising a cylindrical interior surface concentrically disposed about said longitudinal axis of said securement collar, wherein a minimum radius of said interior surface is greater than a maximum radius of said enlargement;
• wherein a distal end of the securement collar, in the assembled condition of the connection system, is positioned adjacent to the barrier wall of the connection stem.