Antibacterial medical tubing connector

• US 5,782,808 A
• Filed: 07/05/1996
• Issued: 07/21/1998
• Est. Priority Date: 02/14/1994
• Status: Expired due to Fees

• Current Assignee: Fresenius USA Incorporated (Fresenius SE & Co. KGaA)
• Original Assignee: Fresenius USA Incorporated (Fresenius SE & Co. KGaA)
• Inventors: Folden, Thomas I.
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): Nguyen, At
• Application Number:
  US08/672,225
• Time in Patent Office: 746 Days
• Field of Search: 604/265, 604/266, 604/280, 604/283, 604/264, 604/905, 285/331, 285/355, 285/390, 285/423, 285/921, 138/155
• US Class Current: 604/265
• CPC Class Codes: A61M 2039/1033 Swivel nut connectors, e.g. threaded connectors, bayonet-connectors
• CPC Class Codes: A61M 2039/1066 having protection means, e.g. sliding sleeve to protect connector itself, shrouds to protect a needle present in the connector, protective housing, isolating sheath
• CPC Class Codes: A61M 39/16 having provision for disinfection or sterilisation A61M39/143 takes precedence; methods or apparatus for disinfection or sterilisation A61L2/00
• CPC Class Codes: Y10S 604/905 Aseptic connectors or couplings, e.g. frangible, piercable

Abstract

An antimicrobial tubing connector for medical procedures, especially for extracorporeal connections as in peritoneal dialysis and hemodialysis tubing sets. A male portion includes a central tube surrounded by a sleeve radially spaced apart from the central tube to define an annular space. A mating female portion includes a tubular body which receives the central tube of the male portion and which is received by the annular space. A set of O-ring seals and mating threads produces a secure fluid-tight connection. An antimicrobial agent such as silver is deposited on one or more of several surfaces, preferably by a durable process such as ion assisted deposition, to prevent touch contamination. Either or both of the male and female portions may be capped with a separate cap, which may also receive the antimicrobial agent.

Claims

1. A method for connecting and establishing fluid communication between a first tubing segment and a second tubing segment, comprising attaching to the first tubing segment a first connector portion having a central tube with a radially inner surface for flowing the fluid, a radially outer surface and an end, and the first portion further having a sleeve extending around the central tube, the sleeve having a radially inner surface spaced radially apart from the central tube to define an annular space between the central tube and the sleeve;

attaching to the second tubing segment a second connector portion, the second connector portion having a tubular body with a radially inner surface to receive said first portion central tube and a radially outer surface which is received by said annular space, wherein an antimicrobial composition is on at least one of said radially inner surface of the central tube, said radially outer surface of the central tube, said radially inner surface of the sleeve, said radially inner surface of the tubular body, and said radially outer surface of the tubular body;

said antimicrobial composition including silver and being applied by ion assisted deposition; and

attaching the first connecter portion to the second connector portion to establish fluid communication therethrough, by urging the first connector portion and the second connector portion together so that the tubular body is received by the annular space and the central tube is received by the tubular body.

2. The method of claim 1, wherein the first connector portion includes threads and the second connector portion includes mating threads, and further comprising securing the connection between the first connector portion and the second connector portion by engaging said first connector portion threads with said second connector portion threads.

3. The method of claim 2, further comprising disconnecting said first connector portion and said second connector portion by disengaging said first connector portion threads from said second connector portion threads;

and capping at least one of said first connector portion and said second connector portion with a threaded cap.

4. A method for connecting and establishing fluid communication between a first tubing segment and a second tubing segment, comprising attaching to the first tubing segment a first connector portion having a central tube with a radially inner surface for flowing the fluid, a radially outer surface and an end, and the first portion further having a sleeve extending around the central tube, the sleeve having a radially inner surface spaced radially apart from the central tube to define an annular space between the central tube and the sleeve;

attaching to the second tubing segment a second connector portion, the second connector portion having a tubular body with a radially inner surface to receive said first portion central tube and a radially outer surface which is received by said annular space, wherein an antimicrobial composition is on at least one of said radially inner surface of the central tube, said radially outer surface of the central tube, said radially inner surface of the sleeve, said radially inner surface of the tubular body, and said radially outer surface of the tubular body; and

attaching the first connecter portion to the second connector portion to establish fluid communication therethrough, by urging the first connector portion and the second connector portion together so that the tubular body is received by the annular space and the central tube is received by the tubular body;

wherein the attaching step utilizes a first O-ring seal positioned between the second portion and the first portion, said first O-ring seal being on one of the radially outer surface of the central tube and the radially inner surface of the tubular body and being sealingly engageable with the other of the radially outer surface of the central tube and the radially inner surface of the tubular body; and

a second O-ring seal positioned between the second portion and the first portion further resulting a fluid-tight seal therebetween.

5. The method of claim 4, wherein the second O-ring seal is on one of the radially outer surface of the tubular body and the radially inner surface of the sleeve, to sealing engage the radially outer surface of the second portion tubular body and the radially inner surface of the sleeve.

6. The method of claim 4, wherein the first connector portion includes threads and the second connector portion includes mating threads, and further comprising securing the connection between the first connector portion and the second connector portion by engaging said first connector portion threads with said second connector portion threads.

7. The method of claim 6, further comprising disconnecting said first connector portion and said second connector portion by disengaging said first connector portion threads from said second connector portion threads;

and capping at least one of said first connector portion and said second connector portion with a threaded cap.