Medical Articles with Microstructured Surface
Medical diagnostic devices or components thereof are described that comprise a microstructured surface that comprises peak structures and adjacent valleys wherein the valleys have a maximum width ranging from 1 to 1000 microns and the peak structures. In some embodiments (e.g. for improved cleanability) the peak structures of the microstructured surface have a side wall angle of greater than 10 degrees. The peak structures may comprise two or more facets such as in the case of a linear array of prisms or an array of cube-comers elements. The microstructured surface of the medical diagnostic device typically comes in contact with multiple patients during normal use of the device, such as a stethoscope diaphragm. The microstructured surface exhibits better microorganism (e.g. bacteria) removal when cleaned and/or provides a reduction in microbial touch transfer. Also described are methods of making and methods of use.
1 . A medical diagnostic device or component thereof, comprising a microstructured surface that comprises peak structures and adjacent valleys wherein the valleys have a maximum width ranging from 1 to 1000 microns.
2 . The device of claim 1 wherein the microstructured surface of the medical diagnostic device comes in contact with multiple patients during normal use of the device.
3 . (canceled)
4 . The device of claim 1 wherein a sensor of the medical diagnostic device comprises the microstructured surface and the sensor has an acoustic diagnostic property that is substantially equal to the same medical diagnostic device or component thereof lacking the microstructured surface.
5 . (canceled)
6 . The device of claim 1 wherein the sensor is a stethoscope diaphragm.
7 . The device of claim 6 wherein the stethoscope diaphragm has a transfer function frequency response curve over a frequency range of 20 to 2000 hertz that is substantially equal to the same diaphragm lacking the microstructured surface.
8 . The device of claim 6 wherein the tubing and/or ear tips of a stethoscope further comprise the microstructured surface.
9 . The device of claim 1 wherein the microstructured surface is integral with the medical diagnostic device or component thereof.
10 . The device of claim 1 wherein the microstructured surface is disposed on a film and the film is bonded to the medical diagnostic device or component thereof.
11 . The device of claim 1 wherein the microstructured surface provides a reduction in microorganism touch transfer of at least 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 95, or 99%.
12 . The device of claim 1 wherein the peak structures of the microstructured surface have a side wall angle of greater than 10 degrees.
13 . The device of claim 1 wherein the facets form continuous or semi-continuous surfaces in the same direction and the valleys lack intersecting walls.
14 . (canceled)
15 . The device of claim 1 wherein the microstructured surface is free of flat surface area that is parallel to the planar base layer or the peak structures and/or valleys are truncated such that the microstructured surface comprises less than 50, 40, 30, 20 or 10% of flat surface area that is parallel to the planar base layer.
16 . (canceled)
17 . The device of claim 1 wherein the microstructured surface provides a log 10 reduction of microorganism (e.g. bacteria) of at least 2, 3, 4, 5, 6, 7 or 8 after cleaning.
18 . (canceled)
19 . The device of claim 1 wherein the peak structures comprise two or more facets.
20 . (canceled)
21 . The device of claim 1 wherein the microstructured surface comprises a linear array of prisms or an array of cube-corners elements.
22 . The device of claim 1 wherein the valleys have a maximum width of 10 microns to 250 microns.
23 . The device of claim 1 wherein peak structures have an apex that is sharp, rounded or truncated and the peak structures have an apex angle ranging from 20 to 120 degrees.
24 - 30 . (canceled)
31 . The device claim 1 wherein at least 50, 60, 70, 80, 90% of the microstructured surface comprises cleaning solution 1-3 minutes after applying the cleaning solution to the microstructured surface.
32 . The device claim 1 wherein the microstructured surface has a Sbi/Svi of greater than 3 and less than 90.
33 . (canceled)
34 . The device claim 1 wherein the microstuctured surface does not comprise a fluorinated or polydimethylsiloxane material.