Disinfecting caps having an extendable feature and related systems and methods

• US 8,343,112 B2
• Filed: 11/30/2010
• Issued: 01/01/2013
• Est. Priority Date: 10/30/2009
• Status: Active Grant

• Current Assignee: Merit Medical Systems, Inc.
• Original Assignee: Catheter Connections Incorporated (Merit Medical Systems, Inc.), University of Utah Research Foundation (State of Utah)
• Inventors: Solomon, Donald D., Ferguson, F. Mark, Bandis, Steven, Mercer, James, Howlett, Michael, Hitchcock, Robert
• Primary Examiner(s): Sirmons, Kevin C
• Assistant Examiner(s): CARPENTER, WILLIAM R
• Application Number:
  US12/956,704
• Publication Number:
  US 20110217212A1
• Time in Patent Office: 763 Days
• Field of Search: 604/905, 604/29, 604/283, 604/256, 604/403, 604/533, 424/292, 424/28, 220/380
• US Class Current: 604/256
• CPC Class Codes: A61L 2/18 Liquid substances or solutions comprising solids or dissolved gases
• CPC Class Codes: A61M 2207/00 Methods of manufacture, assembly or production
• CPC Class Codes: A61M 39/162 with antiseptic agent incorporated within the connector
• CPC Class Codes: A61M 39/165 Shrouds or protectors for aseptically enclosing the connector
• CPC Class Codes: A61M 39/20 Closure caps or plugs for connectors or open ends of tubes
• CPC Class Codes: B65D 41/02 Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
• CPC Class Codes: Y10S 604/905 Aseptic connectors or couplings, e.g. frangible, piercable

Abstract

Some assemblies can include a male cap and a female cap, each of which can be used to cover separated medical connectors. In certain arrangements, a male cap can include a movable carriage that transitions from a retracted position when an assembly with which the male cap is associated is in a closed state to an extended position when the assembly is in an open state.

Claims

1. A cap configured to disinfect a medical connector, the cap comprising:

an outer housing that defines a proximal end, a distal end, and a cavity that extends from the proximal end toward the distal end; and

an inner housing disposed within the outer housing, the inner housing comprising a connection interface that is configured to connect the inner housing to a medical connector, the inner housing defining a chamber having therein an antiseptic, a sealing member and a first biasing member, wherein the sealing member is configured to form a seal with a portion of a medical connector that is inserted into the chamber, and wherein the first biasing member is configured to urge the sealing member in a proximal direction toward an open end of the chamber;

a second biasing member that is coupled with each of the outer and inner housings, wherein the second biasing member is configured to bias the inner housing toward the extended position;

wherein the cap is configured to transition from a pre-use state, in which the inner housing is in a retracted position relative to the outer housing, to a connection-ready state, in which the inner housing is in an extended position relative to the outer housing, wherein the retracted position of the inner housing is closer to the distal end of the outer housing than is the extended position.

2. The cap of claim 1, wherein the proximal end of the outer housing defines a connection interface that is configured to couple with a second cap so as to form a closed assembly.

3. The cap of claim 2, wherein the connection interface is configured to form a fluid-tight seal with the second cap so as to prevent evaporative loss of the antiseptic from the assembly.

4. The cap of claim 2, wherein the connection interface of the inner housing comprises threading.

5. The cap of claim 4, wherein the connection interface defined by the proximal end of the outer housing is devoid of threading.

6. The cap of claim 1, wherein the second biasing member comprises a compression spring.

7. The cap of claim 1, wherein the second biasing member is connected to the inner housing such that the biasing member is configured to inhibit the inner housing from being removed from the outer housing.

8. The cap of claim 7, wherein the second biasing member is in a state of equilibrium when the inner housing is in the extended position.

9. The cap of claim 1, wherein the sealing member is configured to move within the chamber as a male protrusion of a medical connector is inserted into the chamber so as to cause antiseptic to move from one side of the sealing member to another side of the sealing member and into contact with at least a portion of the male protrusion.

10. The cap of claim 1, wherein the first biasing member forces the sealing member into contact with a shelf portion of the inner housing so as to form a seal that prevents evaporative loss of antiseptic from the chamber when the cap is in a pre-use state.

11. The cap of claim 1, wherein the first biasing member comprises a resilient pad that includes at least a portion of the antiseptic therein.

12. The cap of claim 11, wherein the first biasing member further comprises a resilient support member.

13. The cap of claim 1, wherein a proximal end of the inner housing is at an interior of the cavity of the outer housing when the inner housing is in the retracted position, and wherein the proximal end of the inner housing is at an exterior of the outer housing when the inner housing is in the extended position.

14. The cap of claim 1, wherein the inner housing comprises a proximal projection that defines at least a portion of the chamber, and wherein the connection interface of the inner housing comprises threading disposed at an outwardly facing surface of the projection.

15. The cap of claim 1, wherein the outer housing comprises a first movement constraining member and the inner housing comprises a second movement constraining member that is configured to cooperate with the first movement constraining member so as to limit relative movement between the outer and inner housings.

16. The cap of claim 15, wherein the first and second movement constraining members are configured to limit or prevent rotation between the outer and inner housings.

17. The cap of claim 15, wherein the first and second movement constraining members are configured to prevent removal of the inner housing from the outer housing.

18. The cap of claim 15, wherein the first and second movement constraining members are configured to allow a controlled rotation between the outer and inner housings.

19. The cap of claim 15, wherein one of the first and second movement constraining members comprises a spline and the other of the first and second movement constraining members comprises a channel that is sized and shaped to receive the spline therein.

20. The cap of claim 19, wherein each of the spline and the channel defines a helical shape.

21. The cap of claim 1, wherein the outer and inner housings comprise a pair of stopping surfaces that are configured to cooperate with each other to prevent the inner housing from being moved entirely out of the outer housing.

22. The cap of claim 1, further comprising a latching system that is configured to maintain the inner housing in the extended position.

23. The cap of claim 22, wherein one or more of the inner housing and the outer housing comprise at least a portion of the latching system.

24. The cap of claim 22, wherein the second biasing member comprises at least a portion of the latching system.

25. The cap of claim 1, wherein an additional cap is coupled with the cap when the inner housing is in the retracted position, and wherein a connection between the inner housing and the additional cap is configured to move the inner housing from the retracted position to the extended position.

26. The cap of claim 25, wherein the additional cap comprises a connection interface that is configured to couple the additional cap with a medical connector, and wherein the connection interface of the additional cap is coupled with the connection interface of the inner housing when the inner housing is in the retracted position.

27. The cap of claim 25, wherein the connection between the inner housing and the additional cap comprises one or more of a snap fit, a friction fit, and heat stake.

28. The cap of claim 1, wherein the connection interface of the inner housing is configured to complementarily engage a connection interface of a medical connector such that, when the connection interfaces of the inner housing and the medical connector engage each other, the inner housing is drawn into the extended position relative to the outer housing.

29. An assembly configured to disinfect one or more medical connectors, the assembly comprising:

a female-disinfecting cap that comprises a housing that defines a first connection interface; and

a male-disinfecting cap that comprises;

an outer housing that defines a proximal end, a distal end, and a cavity that extends from the proximal end toward the distal end, wherein the outer housing defines a second connection interface that is configured to cooperate with the first connection interface of the female cap to couple the male and female caps with each other;

an inner housing positioned within the cavity of the outer housing, the inner housing comprising a third connection interface that is configured to connect the inner housing to a medical connector, the inner housing defining a chamber having a sealing member and a first biasing member, wherein the sealing member is configured to form a seal with a portion of a medical connector that is inserted into the chamber, and wherein the first biasing member is configured to urge the sealing member in a proximal direction toward an open end of the chamber; and

a second biasing member that is coupled with each of the outer and inner housings,

wherein the second, biasing member is configured to bias the inner housing toward an extended position, wherein, when the assembly is in a pre-use state in which the male and female caps are coupled with each other, a portion of the female cap contacts the inner housing of the male cap so as to maintain the inner housing of the male cap in a retracted position relative to the outer housing of the male cap, and

wherein the assembly is configured such that upon separation of the male and female-disinfecting caps from each other, the second biasing member is configured to urge the inner housing to the extended position.

30. An assembly configured to disinfect one or more medical connectors, the assembly comprising:

a female-disinfecting cap that comprises a housing that defines a first connection interface; and

a male-disinfecting cap that comprises;

an outer housing that defines a proximal end, a distal end, and a cavity that extends from the proximal end toward the distal end, wherein the outer housing defines a second connection interface that is configured to cooperate with the first connection interface of the female cap to couple the male and female-disinfecting caps with each other to form a closed assembly; and

an inner housing positioned within the cavity of the outer housing and movable relative thereto and comprising a third connection interface having threading configured to connect the inner houusing to a medical connector;

wherein, when the assembly is in a pre-use state in which the male and female disinfecting caps are coupled with each other, the inner housing of the male-disinfecting cap is maintained in a retracted position relative to the outer housing, and

wherein the assembly is configured such that during or after separation of the male and female-disinfecting caps from each other, the inner housing of the male-disinfecting cap can be moved to and retained in an extended position relative to the outer housing.

31. A cap configured to disinfect a medical connector, the cap comprising:

an outer housing that defines a proximal end, a distal end, and a cavity that extends from the proximal end toward the distal end;

an inner housing disposed within the outer housing, the inner housing comprising a connection interface that is configured to connect the inner housing to a medical connector, the inner housing defining a chamber having therein an antiseptic, a sealing member and a biasing member, wherein the sealing member is configured to form a seal with a portion of a medical connector that is inserted into the chamber, and wherein the biasing member is configured to urge the sealing member in a proximal direction toward an open end of the chamber; and

means for transitioning the inner housing from a retracted position relative to the outer housing to an extended position relative to the outer housing, wherein the retracted position of the inner housing is closer to the distal end of the outer housing than is the extended position.

32. A cap configured to disinfect a medical connector, the cap comprising:

an outer housing that defines a proximal end, a distal end, and a cavity that extends from the proximal end toward the distal end;

wherein the outer housing defines a first connection interface to couple with a second cap so as to form a closed assembly; and

an inner housing disposed within the outer housing, the inner housing comprising a second connection interface having threading configured to connect the inner housing to a medical connector, the inner housing defining a chamber having an antiseptic therein; and

wherein the cap is configured to transition from a pre-use state, in which the inner housing is in a retracted position relative to the outer housing, to a connection-ready state, in which the inner housing is in an extended position relative to the outer housing, wherein the retracted position of the inner housing is closer to the distal end of the outer housing than is the extended position.

33. A cap configured to disinfect a medical connector, the cap comprising:

an outer housing that defines a proximal end, a distal end, and a cavity that extends from the proximal end toward the distal end; and

an inner housing disposed within the outer housing, the inner housing comprising a proximal projection defining at least a portion of the chamber and a connection interface having outwardly disposed threading to connect the inner housing to a medical connector, the inner housing defining a chamber having an antiseptic therein; and

wherein the cap is configured to transition from a pre-use state, in which the inner housing is in a retracted position relative to the outer housing, to a connection-ready state, in which the inner housing is in an extended position relative to the outer housing, wherein the retracted position of the inner housing is closer to the distal end of the outer housing than is the extended position.

34. An assembly configured to disinfect one or more medical connectors, the assembly comprising:

a female-disinfecting cap that comprises a housing that defines a first connection interface; and

a male-disinfecting cap that comprises;

an outer housing that defines a proximal end, a distal end, and a cavity, wherein the outer housing defines a first connection interface that is configured to cooperate with the second connection interface of the female cap to couple the male and female-disinfecting caps with each other to form a closed assembly; and

an inner housing disposed within the outer housing, the inner housing comprising a proximal projection defining at least a portion of the chamber, the proximal projection having an outwardly disposed third connection interface having threading to connect the inner housing to a medical connector, the inner housing defining a chamber having an antiseptic therein; and

wherein, when the assembly is in a pre-use state in which the male and female disinfecting caps are coupled with each other, the inner housing of the male cap is maintained in a retracted position relative to the outer housing; and

wherein the assembly is configured such that during or after separation of the male and female disinfecting caps from each other, the inner housing of the male-disinfecting cap can be moved to and retained in an extended position relative to the outer housing.