Antimicrobial inserts for medical devices

Patent metadata

Field	Value
Publication number	US-11291749-B2
Application number	US-202017009473-A
Country	US
Kind code	B2
Filing date	Sep 1, 2020
Priority date	Feb 20, 2014
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Inserts can be formed with elution characteristics to cause the inserts to elute an antimicrobial agent when subject to a fluid within a medical device. An insert can be formed with a desired geometry to allow the insert to be compression fit within a medical device to prevent the insert from moving or becoming dislodged once inserted into the medical device. The material may also be hygroscopic so that the insert swells when subject to a fluid thereby enhancing the compression fit of the device within the medical device. In some cases, the material can be reinforced using an internal structure. Inserts can be formed in many ways including by casting, thermoforming, or extrusion. In some cases, the inserts can be formed using a peel-away sleeve or material. The peel-away sleeves can be formed of a non-sticky material which facilitates removal of the inserts once the inserts have cured.

First claim

The invention claimed is:

1. A method for forming an insert within a medical device, the method comprising:
providing a medical device having a partially tapered inner surface, wherein a distal portion of the partially tapered inner surface comprises interior walls that are parallel;
inserting a tapered mandrel into an interior of the medical device, the tapered mandrel having a luer taper that is approximately equal to a luer taper of a tapered portion of the partially tapered inner surface, an outer surface of the tapered mandrel forming a sealed interface with the tapered portion of the partially tapered inner surface, a distal end of the tapered mandrel forming a sealed interface with a distal end surface of the distal portion of the partially tapered inner surface, wherein a wedge-shaped gap is provided between the outer surface of the tapered mandrel and the parallel interior walls of the partially tapered inner surface;
injecting an antimicrobial material into the wedge-shaped gap;
curing the antimicrobial material; and
remove the tapered mandrel.

2. The method of claim 1 , wherein the base material matrix is cured using one of: UV curing, heat curing, or heat forming.

3. The method of claim 1 , further comprising a step for providing an injection port though a wall surface of the medical device, wherein the injection port is in fluid communication with the wedge-shaped gap.

4. The method of claim 1 , further comprising:
coating the outer surface of the tapered mandrel with a releasing agent prior to inserting the tapered mandrel within the interior of the medical device.

Assignees

• Becton Dickinson Co

Inventors

• Bihlmaier Bryan Fred
• Harding Weston F
• Lin Janice
• Liu Huibin
• Shevgoor Siddarth K
• Burkholz Jonathan Karl
• Ma Yiping
• Zhou Ming

Classifications

• A61L29/14

  Materials characterised by their function or physical properties {, e.g. lubricating compositions} · CPC title

• A61M31/00

  Devices for introducing or retaining media, e.g. remedies, in cavities of the body (A61M25/00 takes precedence {; introducing or retaining ophthalmic products into the ocular cavities A61F9/0008}) · CPC title

• A61L2300/404

  Biocides, antimicrobial agents, antiseptic agents · CPC title

• A61L29/06

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• A61L2300/206

  Biguanides, e.g. chlorohexidine · CPC title