US 12,109,369 B2
Medical instrument and device having echogenic markings
Holger Gunkel, Rudolstadt (DE)
Assigned to Thüringisches Institute für Textile- und Kunstostoff-Forschung e.V., Rudolstadt (DE)
Filed by THÜRINGISCHES INSTITUT FÜR TEXTIL—UND KUNSTSTOFF—FORSCHUNG E.V., Rudolstadt (DE)
Filed on May 13, 2020, as Appl. No. 15/930,619.
Claims priority of application No. 10 2019 112 606.1 (DE), filed on May 14, 2019.
Prior Publication US 2020/0360660 A1, Nov. 19, 2020
Int. Cl. A61M 25/00 (2006.01); A61B 90/00 (2016.01); A61L 27/40 (2006.01); A61M 5/00 (2006.01); A61M 25/01 (2006.01); B29C 48/00 (2019.01); B29C 48/09 (2019.01); B29C 48/21 (2019.01); B29K 75/00 (2006.01); B29K 509/02 (2006.01); B29L 31/00 (2006.01)
CPC A61M 25/0045 (2013.01) [A61B 90/39 (2016.02); A61L 27/40 (2013.01); A61M 5/007 (2013.01); A61M 25/0009 (2013.01); A61M 25/0108 (2013.01); B29C 48/0023 (2019.02); B29C 48/022 (2019.02); B29C 48/09 (2019.02); B29C 48/21 (2019.02); A61B 2090/3925 (2016.02); A61L 2420/08 (2013.01); B29K 2075/00 (2013.01); B29K 2509/02 (2013.01); B29L 2031/7542 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A medical device having an echogenic marking, the device comprising an element having a tubular shape, said element comprising an outer polymer layer and at least one inner polymer layer, and at least the outer polymer layer has a smooth surface,
wherein the outer polymer layer is transparent to laser radiation and at least one inner polymer layer contains laser additives comprised of laser absorbers,
the echogenic marking is comprised of closed cavities or bubbles in the at least one inner polymer layer containing laser additives, with the closed cavities or bubbles having been generated by the laser additives under an action of laser radiation,
the laser absorbers have particle sizes in the range of <300 nm, and
the bubbles or closed cavities have a diameter of 5 to 50 μm and a spherical or partially spherical shape.