Adapter and method of attachment for “LUER LOK” receptacles
An adapter for a “LUER LOK” receptacle includes a housing having an internal recess configured to engage a hub of the receptacle. The adapter also includes a fitting attached to the housing, and to a medical instrument such as a cannula or a needle. The fitting includes a tapered recess configured to engage a tapered post of the receptacle. The fitting also includes a male end portion configured to engage female threads on the hub of the receptacle. The male end portion can include threads or alternately a flange. The adapter strengthens and rigidifies the receptacle, and allows the medical instrument to be aggressively manipulated, with less chance of damage to the receptacle and fluid leakage therefrom. In an alternate embodiment adapter, the tapered post of the receptacle is removed to provide an enlarged opening for the receptacle. The enlarged opening permits fluids, tissue and cells to be transferred with less damage and less resistance. A method for attaching the medical instrument to the receptacle includes the steps of: providing the adapter with the medical instrument, then attaching the adapter to the receptacle using aligning, pressing and twisting steps.
This application claims the benefit of U.S. Provisional Application No. 60/206,799 filed May 25, 2000, of U.S. Provisional Application No. 60/241,156 filed Oct. 18, 2000 and of U.S. Provisional Application No. 60/241,442 filed Oct. 19, 2000.
FIELD OF THE INVENTIONThis invention relates generally to medical equipment, and more particularly to an adapter for “LUER LOK” receptacles, and to a method of attachment to “LUER LOK” receptacles.
BACKGROUND OF THE INVENTIONOne well known receptacle used to connect and establish fluid communication between different medical components is known as a “LUER LOK”. “LUER LOK” receptacles are widely used to connect syringes to medical instruments, such as needles and cannulas, and to connect medical conduits to one another. In addition, “LUER LOK” receptacles have a standard configuration that allows different sizes and types of instruments to be connected to the same receptacle.
Referring to
The receptacle 12 also includes a tapered post 22 located partially within the hub 18 but which extends outside of the confines of the hub 18. As with the outside diameter of the hub 18 the outside surface of the tapered post 22 is also smooth. The tapered post 22 is sometimes referred to as the “male” portion of the receptacle 12, and is sometimes referred to as a “LUER” tapered coupling. Typically, the hub 18, the tapered post 22, and the barrel 14, all comprise a same plastic material, which is molded into a unitary structure using an injection molding process.
Referring to
Referring to
This conventional “LUER LOK” receptacle 12 is used effectively throughout the world, but still has several disadvantages. One disadvantage is that the receptacle 12 is prone to crack and break, particularly at the intersection 36 (
This situation is compounded by cannulas, or other instruments, which are relatively long, or which require aggressive manipulation by medical personnel. For example, harvesting of tissue and cells from different organs of the body, requires relatively long cannulas and aggressive manipulation by physicians, which can damage the receptacle 12. In addition, the twisting motion required to lock the cannula 24 to the receptacle 12, can cause the hub 18 to expand outwardly during engagement of the male threads 32 on the cannula 24 with the female threads 20 on the receptacle 12. This expansion can also cause cracking and breaking to occur, or can cause micro cracks that lead to cracking and breaking.
Another disadvantage of the conventional “LUER LOK” receptacle 12 is that the inside diameter (ID-
The present invention is directed to an adapter for “LUER LOK” receptacles which functions to strengthen, to rigidify, to prevent spreading, and to prevent cracking of the receptacle. In addition, the adapter can be used to increase the inside diameter of the receptacle, such that medical fluids and/or harvested cells and tissue, can be more effectively processed.
SUMMARY OF THE INVENTIONIn accordance with the present invention, an adapter for a “LUER LOK” receptacle, and a method for attaching a medical instrument to the receptacle, are provided.
The “LUER LOK” receptacle can be molded on a first medical instrument, such as a syringe, substantially as previously described. The receptacle includes a cylindrical hub having a smooth outside diameter, and a threaded inside diameter having female threads. The receptacle also includes a tapered post located partially within the hub, but extending outside of the confines of the hub.
The adapter is configured for attachment to the receptacle, and functions to strengthen and rigidify the receptacle. The adapter includes a generally cylindrical housing, which preferably comprises a rigid material such as metal, hard plastic or a composite. The housing includes a cylindrical recess configured to slip over the outside diameter of the hub on the receptacle. The inside diameter of the recess is sized relative to the outside diameter of the hub to provide a press fit, and also to seal the mating surfaces. Alternately, rather than a press fit, the inside diameter of the recess can be threaded with cutting threads adapted to cut mating threads on the outside diameter of the hub.
The adapter also includes a fitting which is attached to the housing, and to a second medical instrument, such as a cannula or a needle, having an internal conduit. The fitting includes an internal conduit in flow communication with the internal conduit on the second medical instrument. The fitting also includes a male end portion located within the recess, configured to engage the female threads on the hub of the receptacle. The male end portion can include male threads on an outside diameter thereof configured to threadably engage the female threads on the hub. Alternately the male end portion can have a flange, termed herein as a “butterfly”, which is configured to engage the female threads on the hub. The fitting also includes a tapered recess in the male end portion configured to slip over the tapered post on the receptacle. As with the recess in the housing, the tapered recess is sized relative to the tapered post to provide a press fit, and also to seal the mating surfaces.
For attaching the adapter to the receptacle, the recess on the housing of the adapter is slid onto the hub on the receptacle (or alternately threaded onto the hub in the threaded embodiment). At the same time, the tapered post on the receptacle is slid into the tapered recess on the fitting of the adapter. The housing of the adapter is then twisted, such that the male end portion on the fitting engages the female threads on the hub. As thus attached, the recess in the housing encircles the hub on the receptacle to rigidify and prevent spreading of the hub. In addition, a first fluid tight seal is formed between the male end portion on the fitting and the female threads on the hub, a second fluid tight seal is formed between the tapered post and the tapered recess, and a rigidifying seal is formed between the recess and the hub. The rigidifying seal is not necessarily fluid tight but is configured to provide a rigidifying structure, and to prevent movement of the first and second fluid tight seals.
In an alternate embodiment of the adapter, the tapered post on the receptacle is removed, such that an enlarged opening is provided on the first medical instrument. In addition, the second medical instrument, and the fitting on the adapter, are provided with internal conduits having diameters matching that of the enlarged opening. The alternate embodiment adapter also includes a housing having a recess configured to slip over, or alternately to cut threads on the outside diameter of the hub of the receptacle. The enlarged opening permits fluids, tissue and cells to be transferred through the receptacle with less resistance and less damage.
The method for attaching the medical instrument to the receptacle includes the step of providing the adapter with the housing, the fitting, and the second medical instrument as described above. The method also includes the steps of slipping (or alternately threading) the recess in the housing to the outside diameter of the hub on the adapter, and slipping the tapered post on the receptacle into the tapered recess in the fitting. In addition, the method includes the step of twisting the housing to threadably engage the threads (or the flange) on the male end portion of the fitting with the female threads on the hub.
Referring to
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The medical instrument 46 can comprise any conventional instrument, such as a cannula configured to extract tissue from a patient, or a needle configured to inject a solution into a patient. The medical instrument 46 preferably comprises a metal such as stainless steel, and includes an inside diameter 66 in flow communication with the internal conduit 62 in the fitting 44 and with the inside of the barrel 14 of the syringe 10.
Referring to
In addition to forming the rigidifying seal, the recess 50 supports the entire outside diameter of the hub 18 and prevents the hub 18 from spreading. This rigidified structure allows the medical instrument 46 to be manipulated more aggressively, and decreases the likelihood of the hub 18 or other elements of the receptacle 12 from cracking or breaking. The rigidified structure also protects the fluid tight seals from movement and damage, and helps to prevent fluids, vacuum or pressure from leaking through the fluid tight seals.
Referring to
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The butterfly adapter 40BU includes a housing 42BU, and a fitting 44BU attached to the housing 42BU. The butterfly adapter 40BU also includes a medical instrument 46BU attached to the housing 42BU. In addition, the housing 42BU includes a recess 50BU configured to form a rigidifying seal with a hub 18 (
The fitting 44BU includes a male end portion 60BU configured to form an annular recess 50BU substantially as previously described. The male end portion 60BU includes a flange 82BU which is configured to threadably engage the threaded inside diameter 20 (
Referring to
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The adapter 40B also includes a medical instrument 46B attached to the housing 40B substantially as previously described for medical instrument 46. However, the instrument 46B has an inside diameter that matches the inside diameter ID2 of the enlarged opening 78. The enlarged opening 78 permits increased volumes of fluids, and/or body tissue, such as harvested cells, to be passed through the medical instrument 46B with less resistance, such that less effort is required for medical technicians. In addition, the enlarged opening allows fluids to be transferred with less damage to the fluid. This is of particular importance to fluids containing cells harvested from the body.
Thus the invention provides an adapter for “LUER LOK” receptacles, and a method for attaching medical instruments to “LUER LOK” receptacles. Although the invention has been described with reference to certain preferred embodiments, as will be apparent to those skilled in the art, certain changes and modifications can be made without departing from the scope of the invention as defined by the following claims.
Claims
1. An adapter for a medical receptacle having a hub with an outside diameter and a threaded inside diameter, and a tapered post within the hub, the adapter comprising:
- a housing comprising a recess configured to encircle, seal and rigidify the outside diameter of the hub of the receptacle; and
- a fitting attached to the housing comprising an internal conduit, a tapered recess aligned with the internal conduit configured to engage the tapered post, and a male end portion configured to engage the threaded inside diameter of the hub of the receptacle.
2. The adapter of claim 1 wherein the medical receptacle comprises a syringe.
3. The adapter of claim 1 wherein the male end portion comprises An adapter for a medical receptacle having a hub with an outside diameter and a threaded inside diameter, and a tapered post within the hub, the adapter comprising:
- a housing comprising a housing recess configured to encircle, seal and rigidify the outside diameter of the hub of the receptacle; and
- a fitting attached to the housing comprising an internal conduit, a tapered recess aligned with the internal conduit configured to engage the tapered post, and a male end portion comprising a flange configured to threadably engage the threaded inside diameter of the hub of the receptacle.
4. The adapter of claim 1 3 further comprising a medical instrument attached to the housing in flow communication with the internal conduit.
5. The adapter of claim 1 3 wherein the housing recess is configured to press fit to the outside diameter of the hub of the receptacle.
6. The adapter of claim 1 3 wherein the housing recess comprises cutting threads configured to cut mating threads on the outside diameter of the hub of the receptacle.
7. The adapter of claim 1 3 wherein the housing recess comprises a tapered portion and is configured to form a fluid tight seal with the outside diameter of the hub of the receptacle.
8. An adapter for a medical receptacle having a hub with an outside diameter and a threaded inside diameter, and a tapered post within the hub, the adapter comprising:
- a housing comprising a recess configured to encircle the outside diameter of the hub of the receptacle, to rigidify the hub of the receptacle, and to prevent the hub of the receptacle from spreading; and
- a fitting attached to the housing comprising a portion within the recess having a plurality of male threads configured to engage the threaded inside diameter of the hub of the receptacle, a tapered recess in the portion configured to engage the tapered post, and an internal conduit extending from the tapered recess.
9. The adapter of claim 8 further comprising a medical instrument attached to the housing in flow communication with the internal conduit.
10. The adapter of claim 8 further comprising An adapter for a medical receptacle having a hub with an outside diameter and a threaded inside diameter, and a tapered post within the hub having an outside surface and an inside diameter, the adapter comprising:
- a housing comprising a housing recess configured to encircle the outside diameter of the hub of the receptacle, to rigidify the hub of the receptacle, and to prevent the hub of the receptacle from spreading;
- a fitting attached to the housing comprising a portion within the housing recess having a plurality of male threads configured to engage the threaded inside diameter of the hub of the receptacle, a tapered recess in the portion configured to sealingly engage the outside surface of the tapered post within the inside diameter of the tapered post open in flow communication with an internal conduit extending from the tapered recess; and
- a cannula or a needle attached to the housing in flow communication with the internal conduit.
11. The adapter of claim 8 10 wherein the medical receptacle comprises a syringe.
12. The adapter of claim 8 10 wherein the housing recess is configured to thread to the outside diameter of the hub of the receptacle.
13. The adapter of claim 8 10 wherein the housing recess is configured to form a fluid tight seal with the outside diameter of the hub of the receptacle.
14. An adapter for a medical receptacle having a hub with female threads and a tapered post within the hub having an outside surface and an internal opening, the adapter comprising:
- a housing comprising a housing recess configured to encircle the hub of the receptacle to form a rigidifying seal; and
- a fitting attached to the housing having a first portion within the housing recess and a second portion extending from the housing,
- the fitting comprising a plurality of male threads on an outside surface of the first portion configured to engage the female threads on the hub of the receptacle to form a first fluid tight seal, a tapered recess in the first portion configured to sealingly engage the outside surface of the tapered post to form a second fluid tight seal with the internal opening open, and an internal conduit extending through the first portion and the second portion configured for flow communication with the internal opening in the tapered post,
- the rigidifying seal configured to prevent movement of the first fluid tight seal and the second fluid tight seal.
15. The adapter of claim 14 further comprising a medical instrument attached to the second portion of the fitting having an inside diameter in flow communication with the internal conduit.
16. The adapter of claim 14 wherein the housing recess is configured to form a press fit with an outside diameter of the hub of the receptacle and to rigidify and prevent the hub from spreading.
17. The adapter of claim 14 wherein the housing recess comprises a plurality of threads configured to cut mating threads on an outside diameter of the hub of the receptacle.
18. The adapter of claim 14 wherein the housing recess comprises a tapered portion configured to form a fluid tight seal with an outside diameter of the hub of the receptacle.
19. The adapter of claim 14 wherein the fitting is configured to form an annular recess in the housing recess having a thickness approximately equal to a wall thickness of the hub of the receptacle.
20. An adapter for a medical receptacle having a hub with female threads and a tapered post within the hub having an outside surface and an internal opening, the adapter comprising:
- a housing comprising a housing recess configured to encircle, seal and rigidify the hub of the receptacle; and
- a fitting attached to the housing having a first portion within the housing recess and a second portion extending from the housing,
- the fitting comprising at least one flange on an outside surface of the first portion configured to engage the female threads on the hub of the receptacle, a tapered recess in the first portion configured to sealingly engage the outside surface of the tapered post to form a fluid tight seal with the internal opening open, and an internal conduit extending through the first portion and the second portion configured for flow communication with the internal opening in the tapered post.
21. The adapter of claim 20 wherein the housing recess comprises a tapered portion and is configured to form a second fluid tight seal with the hub of the receptacle.
22. In a medical receptacle having a hub with an outside diameter and a threaded inside diameter, and a tapered post within the hub having an outside surface and an inside diameter, a method for attaching a medical instrument to the receptacle comprising:
- providing an adapter comprising: a housing comprising a housing recess configured to encircle, seal and rigidify the outside diameter of the hub; and a fitting attached to the housing comprising a first portion within the housing recess having a male end portion configured to engage the threaded inside diameter of the hub, a tapered recess in the male end portion configured to sealingly engage the outside surface of the tapered post with the inside diameter open, a second portion attached to the medical instrument, and an internal conduit in flow communication with the inside diameter of the tapered post and with the medical instrument;
- engaging the outside diameter of the hub with the housing recess;
- sealingly engaging the outside surface of the tapered post with the tapered recess to form a fluid tight seal therebetween leaving the inside diameter open; and
- twisting the housing to engage the male end portion on the fitting to the threaded inside diameter of the hub.
23. The method of claim 22 wherein the male end portion comprises a plurality of threads.
24. The method of claim 22 wherein the male end portion comprises at least one flange.
25. The method of claim 22 wherein the engaging the outside diameter step comprises press fitting the housing recess to the outside diameter of the hub.
26. The method of claim 22 wherein the engaging the outside diameter step comprises threading the housing recess to the outside diameter of the hub.
27. In a medical receptacle having a hub with an outside diameter and a threaded inside diameter, and a tapered post within the hub, a method for attaching a medical instrument to the receptacle comprising:
- removing the tapered post to form an enlarged opening;
- providing an adapter attached to the instrument, the adapter comprising a recess configured to encircle, seal and rigidify the outside diameter of the hub; and
- engaging the outside diameter of the hub with the recess.
28. The method of claim 27 wherein the engaging step comprises press fitting the recess to the outside diameter of the hub.
29. The method of claim 27 wherein the engaging step comprises providing the recess with cutting threads and then forming mating threads on the outside diameter of the hub using the cutting threads.
30. The method of claim 27 wherein the engaging step comprises providing the recess with a tapered portion and then forming a fluid tight seal with the outside diameter of the hub using the tapered portion.
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Type: Grant
Filed: Mar 6, 2008
Date of Patent: Aug 21, 2012
Assignee: Mary Lucille Pilkington Trust (San Diego, CA)
Inventors: Johnnie M. Johnson (San Diego, CA), Marc Pilkington (Mesa, AZ)
Primary Examiner: Kevin C Sirmons
Assistant Examiner: William Carpenter
Attorney: Stephen A. Gratton
Application Number: 12/043,861
International Classification: A61M 5/178 (20060101);