Angiographic syringe and connector for joining a catheter thereto

• US 4,573,978 A
• Filed: 03/15/1984
• Issued: 03/04/1986
• Est. Priority Date: 03/15/1984
• Status: Expired due to Fees

• Current Assignee: Medrad Incorporated (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Reilly, David M.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US06/680,407
• Time in Patent Office: 719 Days
• Field of Search: 604/240, 604/241, 604/280, 604/283, 604/905, 285/122, 285/332, 285/328
• US Class Current: 604/240
• CPC Class Codes: A61M 2039/1027 Quick-acting type connectors
• CPC Class Codes: A61M 2039/1033 Swivel nut connectors, e.g. threaded connectors, bayonet-connectors
• CPC Class Codes: A61M 39/10 Tube connectors; Tube couplings A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014
• CPC Class Codes: F16L 37/084 combined with automatic locking
• CPC Class Codes: F16L 37/0985 the flexible hook extending radially inwardly from an outer part and engaging a bead, recess or the like on an inner part F16L37/0982 takes precedence

Abstract

An angiographic syringe and a connector for effecting the connection of a catheter to the syringe is disclosed. The connector is a tubular member that engages the syringe at the discharge end and removably engages a suitable end member of a catheter. In the preferred embodiment, the connector is a hollow single-piece structure with tabs at one end for engaging the discharge end of the syringe. A track in the discharge end permits purely rotational movement of the connector about the syringe and eliminates any translational movement thereon. The other end of the connector employs an inner thread to engage the corresponding end of the catheter. Rotational movement of the connector about the discharge end of the syringe draws the catheter into tight engagement therewith, eliminating any rotational movement of either the syringe or catheter.

Claims

1. A syringe assembly for introducing fluids into the body of an animal and connectable with a catheter, said assembly comprising:

a syringe having a tubular body with an outwardly extending flange at one end, a piston slidably positioned in said body, a discharge extension, an intermediate portion connecting said tubular body and said discharge extension, said discharge extension including engagement means for engaging a connector thereto, and an outlet from said discharge extension;

a connector comprising a hollow tubular body having a first and second end and an intermediate portion defining the axial spacing between said first and second ends, said connector including first attachment means positioned internally on said first end and disposed for engaging said discharge extension engagement means, and second attachment means positioned internally on said second end and disposed for engaging said catheter; and

said first attachment means designed to rotatably engage said discharge extension engagement means so as to permit purely rotational movement of said connector about said discharge extension and preclude translational movement thereon.

2. An assembly as defined in claim 1, wherein said discharge extension includes guide means for axially guiding said connector into position on said discharge extension.

3. An assembly as defined in claim 2, wherein said guide means includes a conically shaped portion of said discharge extension, the taper of said conically shaped portion extending outwardly from said engagement means toward said outlet so as to permit the gradual acceptance of the first attachment means of said connector as said connector traverses axially across said outlet toward said engagement means.

4. An assembly as defined in claim 3, wherein said engagement means comprises a track in said discharge extension, said track disposed adjacent to said conically shaped portion in the direction of said tubular body.

5. An assembly as defined in claim 4, wherein said first attachment means comprises first and second tabs, said tabs disposed opposite one another.

6. An assembly as defined in claim 5, wherein said second attachment means comprises a multiple start thread for engaging said catheter, thereby permitting attachment of said catheter by rotating said connector about said discharge extension causing said catheter to become threadly engaged with said connector so as to avoid twisting either said syringe or said catheter.

7. An assembly as defined in claim 6, wherein said intermediate portion includes window portions adjacent said first and second tabs to facilite rotational movement of said connector and increase flexibility of said intermediate portion.

16. A syringe assembly as defined in claim 1, wherein said hollow tubular body is of integral one-piece construction, said connector first attachment means is formed internally on said first end of said hollow tubular body and rotatably receives said discharge extension engagement means in said first end of said body, and said connector second attachment means is formed internally on said second end of said hollow tubular body for receiving a portion of said catheter in said second end of said body.

8. A connector for securely interconnecting a catheter and a syringe, said connector comprising:

a hollow tubular body having a first and second end and an intermediate portion defining the axial spacing between said first and second ends;

said hollow tubular body including first attachment means positioned internally on said first end and disposed for engaging said syringe, and second attachment means positioned internally on said second end and disposed for engaging said catheter; and

said first attachment means designed to rotatably engage said syringe so as to permit purely rotational movement of said connector about said syringe and preclude translational movement thereon.

9. A connector as defined in claim 8, wherein said first attachment means comprises first and second tabs, said tabs disposed opposite one another.

10. A connector as defined in claim 9, wherein said second attachment means comprises a multiple start thread for engaging said catheter, thereby permitting attachment of said catheter by rotating said connector about said syringe causing said catheter to become threadly engaged with said connector so as to avoid twisting either said syringe or said catheter.

11. A connector as defined in claim 10, wherein said intermediate portion includes window portions adJacent said first and second tabs to facilite rotational movement of said connector and increase flexibility of said intermediate portion.

17. A connector as defined in claim 8, wherein said hollow tubular body is of integral one-piece construction, said first attachment means is formed internally on said first and of said hollow tubular body for receiving a portion of said syringe in said first end, and said second attachment means is formed internally on said second end of said hollow tubular body for receiving a portion of said catheter in said second end.

12. An angiographic syringe for introducing fluids into the body of an animal for use in combination with a catheter and a syringe-catheter connector having a first attachment means for engaging with a syringe, said syringe comprising:

a tubular body having an outwardly extending flange at one end;

a piston slidably positioned in said body;

a discharge extension;

an intermediate portion connecting said tubular body and said discharge extension;

said discharge extension including engagement means for engaging a connector thereto;

an outlet from said discharge extension; and

said engagement means designed such that said first attachment means of said connector rotatably engages therewith, thereby permitting only rotational movement of said connector about said discharge extension and precluding translational movement thereon.

13. A syringe as defined in claim 12, wherein said discharge extension includes guide means for axially guiding said connector into position on said discharge extension.

14. A syringe as defined in claim 13, wherein said guide means includes a conically shaped portion of said discharge extension, the taper of said conically shaped portion extending outwardly from said engagement means toward said outlet so as to permit the gradual acceptance of the first attachment means of said connector as said connector traverses axially across said outlet toward said engagement means.

15. A syringe as defined in claim 14, wherein said engagement means comprises a track in said discharge extension, said track disposed adjacent to said conically shaped portion in the direction of said tubular body.