Needle-based medical device including needle guide
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Publication Number
US-8496628-B2
Publication Date
2013-07-30
Expiration Date
Abstract
A needle-based medical device including a needle guide and a method for constructing the same are disclosed. The needle-based medical device includes a tube having a first lumen; a needle guide which is dimensioned to be inserted into the lumen of the tube, and a needle. The needle is inserted such that an end is positioned in the needle guide. A glue may also be provided to secure the needle guide to the tube. In one embodiment, the tube may be made of extruded plastic.
Core Innovation
The invention relates to a needle-based medical device having a needle hub assembly in which a tube having a first lumen cooperates with a needle guide. The needle guide includes a cylindrical body with an outer surface that is dimensioned to be inserted at least partially into the first lumen, and the needle guide further includes a second lumen. The cylindrical body has at least one rib extending longitudinally in a distal direction from a distal end of the cylindrical body and the needle guide includes a glue well.
A first annular space is defined between the outer surface of the cylindrical body and the first lumen of the tube, while a needle having a proximal end is positioned in the second lumen. Glue is used to secure the proximal end of the needle to the second lumen and to secure the needle guide to the tube, where the glue is in contact with the second lumen, the proximal end of the needle, the outer surface of the cylindrical body, and the first lumen. The glue well and the defined annular space establish the locations of glue contact around the interfaces between the needle, the needle guide cylindrical body, and the tube.
The rib arrangement and fit of the needle guide into the tube lumen support coaxial alignment and retention, and a flange provides a depth stop for insertion. The assembly includes glue to flow by capillary action into the annular space and then be cured, and further embodiments describe assembly options for needle and glue access during manufacturing, including structures such as cutouts or detachable needle-shield portions. The disclosed needle hub concept includes hermetic sealing in some embodiments.
Claims Coverage
The independent claim set includes 1 independent claim. This claim provides coverage for a needle-based medical device with a specific needle hub assembly architecture including a tube with a first lumen, a needle guide with a cylindrical body, a second lumen, longitudinal rib(s), and a glue well, and glue securing the needle proximal end and the needle guide to the tube with glue contact across defined luminal and annular interfaces.
Tube with first lumen and needle hub assembly
A needle-based medical device having a needle hub assembly including a tube having a first lumen.
Needle guide with cylindrical body, second lumen, longitudinal ribs, and glue well
A needle guide including a cylindrical body having an outer surface dimensioned to be inserted at least partially into the first lumen, a second lumen, at least one rib extending longitudinally in a distal direction from a distal end of the cylindrical body, and a glue well.
First annular space between needle guide outer surface and tube first lumen
A first annular space defined between the outer surface of the cylindrical body and the first lumen of the tube.
Needle proximal end positioned in the needle guide second lumen
A needle having a proximal end positioned in the second lumen.
Glue securing with defined glue contact surfaces
Glue to secure the proximal end of the needle to the second lumen and the needle guide to the tube, the glue being in contact with the second lumen, the proximal end of the needle, the outer surface of the cylindrical body, and the first lumen.
Overall, the independent claim coverage centers on the cooperative geometry of the tube first lumen and needle guide cylindrical body, including longitudinal rib(s) and a glue well, the placement of the needle proximal end in the needle guide second lumen, and the use of glue that contacts both luminal and annular interfaces to secure the needle and needle guide to the tube.
Stated Advantages
The rib arrangement and fit of the needle guide into the tube lumen support coaxial alignment and retention.
The flange provides a depth stop for insertion.
Glue flows by capillary action into the annular space and then is cured.
The disclosed needle hub concept includes hermetic sealing in some embodiments.
Documented Applications
Needle and glue access during manufacturing, including structures such as cutouts or detachable needle-shield portions.
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