ATRAUMATIC ASPIRATING CATHETER Russian patent published in 2014 - IPC A61M1/00 A61M25/00 A61M16/04 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to aspirating catheters for aspiration of mucus and other flowing media and excretions at least from part of patient's respiratory ways, namely from tracheabronchial ways. Aspirating catheter contains case and multiple holes. Case is mainly tube-shaped with cavity formed inside it, and contains external surface, distal tip with hole, connected with cavity, proximal end with hole, connected with cavity and made with possibility of connection to source of underpressure. Multiple holes are located near distal end of said case. Holes have edges and area. Ratio of area of holes to area of external surface of catheter between edges of holes constitutes from 28 to 42 percent. Said holes are separated with transverse elements. Said transverse elements are bent outwards when brought in contact with object. In the second version of aspirating catheter implementation distal tip has multitude of located with equal spaces holes, positioned near distal tip and separated with transverse elements, bending outwards when catheter contacts with surface. Catheter possesses force of interaction which is at least 35 percent less than analogous catheter, made from the same material but without holes. In the third version of implementation aspirating catheter is made with strap, starting at the distance approximately from 1 mm to 3 mm from distal tip of catheter and continuing proximally for the distance approximately from 4 to 6 mm. Area of open holes constitutes approximately from 28 to 42 percent of said strap area.

EFFECT: technical result, achieved by claimed invention, consists in the following: holes become less susceptible to clogging, which makes it possible to achieve less traumatic force of aspiration in the course of procedure, and in addition, cause less traumas, when catheter encounters an obstacle such as sensitive tissue.

14 cl, 9 tbl, 13 dwg