US 12,144,971 B2
Device for temporarily, locally applying fluids
Sebastian Vogt, Wehrheim (DE); and Thomas Kluge, Wehrheim (DE)
Assigned to Heraeus Medical GmbH, Wehrheim (DE)
Filed by Heraeus Medical GmbH, Wehrheim (DE)
Filed on Sep. 18, 2020, as Appl. No. 17/025,653.
Claims priority of application No. 19198038 (EP), filed on Sep. 18, 2019; and application No. 20153853 (EP), filed on Jan. 27, 2020.
Prior Publication US 2021/0077739 A1, Mar. 18, 2021
Int. Cl. A61M 5/315 (2006.01); A61M 5/31 (2006.01)
CPC A61M 5/31511 (2013.01) [A61M 5/31525 (2013.01); A61M 5/31576 (2013.01); A61M 2005/3128 (2013.01); A61M 2205/02 (2013.01); A61M 2205/32 (2013.01); A61M 2205/3334 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A device for locally applying a medical fluid, comprising
a tube, the tube being flexibly deformable and comprising a tube wall;
wherein the tube comprises a plurality of openings in the tube wall, the plurality of openings connecting an inner line of the tube to the surroundings of the tube, and the tube being closed at a distal tube end of the tube;
wherein a proximal tube end of the tube is liquid-permeably connected or connectable to a container for the medical fluid such that the medical fluid from the container can be pushed through the proximal tube end of the tube into the inner line of the tube and can be pushed out through the plurality of openings into the surroundings of the tube; and
wherein the device comprises an outer sleeve for fluid-tightly closing a subset of the plurality of openings, the outer sleeve being axially movably arranged around the tube, and the outer sleeve being shorter than the tube such that the distal openings that are not part of the closed subset of the plurality of openings are exposed; and
wherein the tube wall comprises an outer wall that is made of a first material and is arranged radially externally, and the tube wall comprises an inner wall that is made of a second material, is arranged radially internally and delimits the inner line of the tube, wherein the outer wall and the inner wall are rigidly interconnected and such that the first and second materials allow the outer and inner walls to respond differently to physical or chemical parameters, wherein the plurality of openings in the inner wall or the outer wall are slot-shaped and have an open cross section which, when hydrostatic pressure of 500 kPa is applied by the medical fluid, is larger by a factor of two or more than when pressure is not applied.