Catheter connector including seal ring and method

• US 6,562,023 B1
• Filed: 01/16/2001
• Issued: 05/13/2003
• Est. Priority Date: 04/23/1999
• Status: Active Grant

• Current Assignee: Smiths Medical ASD, Inc. (Smiths Group International Holdings Ltd.)
• Original Assignee: Deltek, Inc. (Roper Technologies, Inc.)
• Inventors: Beling, William L., Marrs, James C., Cai, Chad Qinsheng, Puryear, Harry A.
• Primary Examiner(s): Huson, Gregory
• Assistant Examiner(s): Ramana, Anuradha
• Application Number:
  US09/673,709
• Time in Patent Office: 847 Days
• Field of Search: 285/371, 604/93.01, 604/175, 604/533-539, 604/288.04, 604/288.01
• US Class Current: 604/533
• CPC Class Codes: A61M 2039/0211 with multiple chambers in a single site
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276

Abstract

A catheter connector includes an outlet tube (34, 36), and a compression seal (140) defining an undulating shape to product ring seals during use. A cam slot formed on a lever arm is useable in locking a locking sleeve (120) of the connector. The lever arm acts as a compensating mechanism for over compression of the seal. The catheter tip (32a) is received in a tip recess (92) of the connector. The connector is useable on an implanted port (20), including a dual port with parallel outlet tubes (34, 36), and a dual lumen catheter (24).

Claims

1. A connector for a catheter comprising:

a base arrangement including;

two tubes extending from the base arrangement and each terminating at an end, each tube sized to be received inside the catheter;

a surface surrounding both of the tubes positioned to engage a first end of a compression seal; and

a bayonet extending from the base arrangement; and

a locking sleeve engageable with the base arrangement and rotatable relative thereto, the locking sleeve including an outer body and a compression seal received within the outer body, the compression seal having first and second ends, the outer body including an inner shoulder positioned to engage the second end of the compression seal, the outer body including a cam slot for receiving the bayonet, the cam slot including an angled portion, the cam slot including an overcenter portion, the locking sleeve including a compensating mechanism for allowing further rotation of the locking sleeve at an over compression condition of the compression seal, the compression seal engageable with the catheter to seal the catheter to the tubes when the locking sleeve is mounted to the base arrangement.

2. The connector of claim 1, wherein a portion of the cam slot is defined by a movable lever arm of the outer body, the moveable lever arm forming at least a portion of the compensating mechanism.

3. The connector of claim 1, wherein the compression seal includes an undulating configuration in an uncompressed state, wherein the compression seal has an inner surface and an outer surface each defining an undulating shape.

4. The connector of claim 1, wherein the base arrangement defines a catheter tip recess having a generally cylindrical inner surface, and a stop surface, the catheter tip surrounded by the inner surface, and the tip engageable with the stop surface.

5. The connector of claim 4, wherein the base arrangement defines an inspection hole communicating with the catheter tip recess to allow viewing of the catheter tip positioned in the catheter tip recess before the locking sleeve is mounted to the base arrangement.

6. The connector of claim 1, wherein the base arrangement forms a portion of an implantable port including a resealable septum.

7. The connector of claim 1, wherein the base arrangement includes two bayonets, and wherein the locking sleeve includes two cam slots, each cam slot defined by a moveable lever arm.

8. The connector of claim 1, wherein the tubes define back-to-back general D shapes.

9. A connector for a dual lumen catheter comprising:

a) a base arrangement including;

1) two tubes extending from the base arrangement and each terminating at an end, each tube sized to be received inside the catheter, each end defining a general D shape, each D shape facing back-to-back with the other D shape, each D shape having rounded corners;

2) a surface surrounding both of the tubes positioned to engage a first end of a compression seal;

3) a bayonet extending from the base arrangement;

4) the base arrangement defining a catheter tip recess having a generally cylindrical inner surface, and a stop surface positioned adjacent to the outlet tubes;

b) a locking member mountable to the base arrangement and rotatable relative thereto, the locking member including a surface to engage a second end of a compression seal, the locking member including a cam slot for receiving the bayonet, the cam slot including an angled portion, the cam slot including an overcenter portion;

c) a compression seal positioned between the surface of the base arrangement and the surface of the locking member, the compression seal having first and second ends, the compression seal including an undulating configuration in an uncompressed state, wherein the compression seal has an inner surface and an outer surface each defining an undulating shape, the compression seal engageable with the catheter to seal the catheter to the tubes when the locking member is mounted to the base arrangement, the catheter tip surrounded by the inner surface and engageable with the stop surface; and

d) a compensating mechanism for allowing further rotation of the locking member at an overcompression condition of the compression seal.

10. A method of using a catheter connector, comprising the steps of:

providing a base arrangement of the connector including a tube and a bayonet;

positioning a catheter on the tube;

providing a locking sleeve lockable to the base arrangement, the locking sleeve including a compression seal compressible between the locking sleeve and the base arrangement, the locking ring including a cam slot on a lever arm, the cam slot including a detent;

engaging the cam slot with the bayonet;

compressing the seal between the locking sleeve and the base arrangement; and

moving the lever arm as the bayonet is moved along the cam slot to the detent.

11. The method of claim 10, wherein the base arrangement includes two tubes, each having a general D shape.