|Publication number||USRE39499 E1|
|Application number||US 09/998,991|
|Publication date||Feb 27, 2007|
|Filing date||Nov 29, 2001|
|Priority date||Jan 15, 1998|
|Publication number||09998991, 998991, US RE39499 E1, US RE39499E1, US-E1-RE39499, USRE39499 E1, USRE39499E1|
|Inventors||Nicholas Sandor Racz|
|Original Assignee||Epimed International, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (30), Referenced by (22), Classifications (18), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application is a divisional of application Ser. No. 09/007,460, filed Jan. 15, 1998, now U.S. Pat. No. 5,993,437, issued Nov. 30, 1999.
This invention generally relates to connectors for catheters which introduce fluids into body cavities. More specifically, the invention relates to devices disposed within catheter connectors which prevent the dislocation of a catheter tube from a catheter connector.
Catheter connectors are well known. One such device, which is commonly referred to as a “Tuohy-Borst” connector, includes two threaded members which enclose an elongated, compressible O-ring. In use of that device, a catheter tube is inserted into one of the connector members and inserted through a channel defined by the O-ring. Upon engagement of the two threaded members, the O-ring is longitudinally compressed, decreasing the cross-sectional diameter of the channel and frictionally securing the catheter tube therein.
A similar device is disclosed in U.S. Pat. No. 5,053,015 to Gross (Oct. 1,1991). The catheter connector of Gross includes a body member, into which a catheter tube is insertable, a compression member which locks into the body member upon interconnection therewith, and a compressible, elongated plug disposed in the body member. In use of that device, a catheter tube is inserted into the body member and through a channel of the elongated plug. Upon engagement of the body and compression members, the elongated plug is compressed, which decreases the cross-sectional diameter of the channel and frictionally secures the catheter tube therein. The connector assembly of Gross also includes a slip washer, which merely facilitates the rotational interconnection of the body and compression members (i.e., by screwing the complementary threaded body and compression members together).
Such devices are somewhat problematic in that the sole use of a compressible member having a channel formed therethrough may be insufficient to adequately secure a catheter tube within the connector especially if the catheter surface gets wet before insertion of the catheter tube into the connector.
Although the previously-described catheter connectors work well for many applications, it has been found that an additional catheter tube-securing element prevents dislocation of a catheter tube from the catheter connector to an even greater degree.
The invention thus includes a compressible lock washer which is useful in a catheter connector. As the lock washer is compressed, the cross-sectional diameter of a tube receptacle formed centrally therethrough decreases, thus securing a tube placed therein. In use, a catheter tube is inserted into a catheter connector assembly, including the lock washer disposed therein. Upon interconnection of the catheter connector members, the lock washer is compressed, decreasing the cross-sectional diameter of the tube receptacle and engaging the catheter tube which runs therethrough.
In another aspect, the invention includes a catheter connector assembly including a compressible lock washer, as previously described, and methods for manufacturing the lock washer and connector.
In the drawings, which depict presently preferred embodiments of the invention and in which like reference numerals refer to like parts in different views:
As shown in
The distal end of the cap 22 includes a body and may also include an elongated cylindrical extension, which is referred to as an alignment element 48. The body of the cap 22 defines an elongated lumen 40 that is open to the proximal end of the cap and extends approximately centrally through the cap and into the alignment element 48 thereof. The alignment element 48 includes an end wall 56, thus lumen 40 includes a closed end. The cap 22 also includes a center member receptacle 51 formed in the distal end thereof of receiving and engaging the proximal end of the center member 24 (i.e., locking element 49, described below). The center member receptacle 51 include an interconnect component 50 (e.g., a LEUR LOCK™ receptacle) formed therein.
The center member 24, which is also referred to as a second member for simplicity, is a generally hollow cylindrical member including a body that defines a lumen 44 entirely therethrough. An insertion member receptacle 26 is disposed about the periphery of the center member 24, proximate the distal end of the same. The insertion member receptacle 26 is configured to receive the proximal end of the insertion member 28 and interconnect therewith (e.g., by threads). The proximal end of the center member 24 includes a hollow, cylindrical extension, which is referred to as a locking element 49. The proximal end of the lumen 44 is defined by locking element 49 and is configured to receive the alignment element 48 of the cap 22. The cross-sectional diameter of the lumen 44 may decrease near the distal end of the center member 24. The locking element 49 includes locking elements 52 (e.g., LEUR LOCK™ extensions) adjacent the distal end thereof, which are configured to engage the interconnect component 50 of the cap 22.
The insertion member 28, which is also referred to as a first member for simplicity, is also a generally hollow cylindrical member including a body that defines an elongated lumen 30 through the center thereof, a distal end 54, and a substantially round aperture 42 formed approximately centrally through the distal end. The proximal end of the insertion member 28 includes an interconnection component 46 (e.g., external threading) that is complementary to a first receptacle 26 (which includes, e.g., internal threading) and configured to interconnect therewith. The lumen 30 is configured to receive a gasket 32. The distal end aperture 42 is configured to facilitate the insertion of a catheter tube 58 therethrough.
The lock washer 60 and gasket 32 are disposed within the lumen 30 of the insertion member 28 and are held into place by the interconnection of the insertion member 28 with the center member 24. In order to interconnect the center member 24 and the insertion member 28, the interconnection component 46 of the insert member 28 is inserted into and engaged by the receptacle 26 of the distal end of the center member 24.
With reference to
Referring now to
Each tube engagement flange 64A′, 64B′, 64C′, 64D′ is a resilient member that includes a central tip 66A′, 66B′, 66C′, 66D′. Preferably, the central tips 66A-D′ are collectively configured to receive a catheter tube 58 (see
Webs 68′A, 68′B, 68°C, 68′D are collapsible, resilient elements which facilitate the transition of the tube engagement flanges 64A′, 64B′, 64C′, 64D′, and therefore the lock washer 60′, from the engaged state to the relaxed state following the release of a transverse load thereon. While the lock washer 60′ is in the engaged sate, as depicted in
Referring again to
With continued reference to
Although shown in use as a catheter connector, the invention may also be used to establish and maintain a fluidic connect between other types of tubes.
After being apprised of the devices according to the invention, methods of making them will become readily apparent to those of skill in the art. For instance, a lock washer can be made from a hypoallergenic, firm, resilient plastic material such as acrylonitrile butadiene styrene (ABS), acetyl, nylon, polycarbonate, polyesters, polyethylene, polypropylene, polystyrene, polysulfone, polyurethane, and polyvinyl chloride (PVC). Likewise, a cap, insertion member, and center member may be manufactured from similar materials and by methods which are readily apparent to those of skill in the art. The gasket can be made from a hypoallergenic, collapsible, resilient, low durometer elastomeric material such as a urethane.
Furthermore, the lock washer and connector assembly might otherwise be modified. For instance, in its relaxed state, the lock washer may have a substantially hemispherical appearance. The tube engagement flanges will typically number from three to eight per each lock washer. The connector disclosed herein will work with most types of catheters. The lock washer disclosed herein will work with most Tuohy-Borst catheter connectors. The size of the lock washer and connector will be chosen dependent on the size of the catheter. Typically however, for epidural applications, the lock washer has a diameter of less than about 1 cm and the catheter tube secured thereby has outer diameter of about one mm. As another example, an element other than the described cap, such as a LEUR LOCK™ syringe, may be joined to the connector.
Although the invention has been described with regard to certain preferred embodiments, the scope of the invention is to be defined by the appended claims.
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|U.S. Classification||604/534, 411/512, 411/531, 411/161, 604/905, 128/912|
|International Classification||F16B39/24, F16B21/00, A61M39/12, A61M25/18, A61M39/06, A61M25/16|
|Cooperative Classification||A61M39/0613, A61M39/12, A61M2039/1027, A61M2039/062|
|European Classification||A61M39/12, A61M39/06D|
|Nov 29, 2006||AS||Assignment|
Owner name: EPIMED INTERNATIONAL, INC., NEW YORK
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RACZ, N. SANDOR;REEL/FRAME:018562/0242
Effective date: 20061129
|Apr 30, 2008||FPAY||Fee payment|
Year of fee payment: 8
|Jul 9, 2012||AS||Assignment|
Owner name: CUSTOM MEDICAL APPLICATIONS, INC., NEW YORK
Free format text: NUNC PRO TUNC ASSIGNMENT - EFFECTIVE JULY 1, 2004;ASSIGNOR:EPIMED INTERNATIONAL, INC.;REEL/FRAME:028527/0538
Effective date: 20120629
|Aug 8, 2012||FPAY||Fee payment|
Year of fee payment: 12