US 11,925,744 B2
Medical flushing pump comprising two suction lines
Christian Hunger, Oranienburg (DE); Lucile Tartivel, Berlin (DE); Jan Hendrik Carstens, Berlin (DE); Mike Plessner, Friesack (DE); Nils Gelbert, Berlin (DE); Stan Schnuettgen, Berlin (DE); Oliver Rath, Berlin (DE); and Thomas Christmann, Berlin (DE)
Assigned to W.O.M. WORLD OF MEDICINE GMBH, Berlin (DE)
Appl. No. 17/311,389
Filed by W.O.M. WORLD OF MEDICINE GMBH, Berlin (DE)
PCT Filed Dec. 4, 2019, PCT No. PCT/DE2019/000312
§ 371(c)(1), (2) Date Jun. 7, 2021,
PCT Pub. No. WO2020/114534, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 10 2018 009 537.2 (DE), filed on Dec. 7, 2018; and application No. 10 2019 004 629.3 (DE), filed on Jul. 5, 2019.
Prior Publication US 2022/0023524 A1, Jan. 27, 2022
Int. Cl. A61M 1/00 (2006.01)
CPC A61M 1/743 (2021.05) [A61M 1/60 (2021.05); A61M 1/77 (2021.05)] 1 Claim
OG exemplary drawing
 
1. A device for flushing a body cavity (K), comprising
(i) a storage container (1) for the flushing liq¬uid,
(ii) a supply line (2),
(iii) a controlled roller wheel pump (3),
(iv) a controlled vacuum pump (4),
(v) a first medical instrument (5) with a first suction line (6),
(vi) a second medical instrument (7) with a second suction line (8),
(vii) optionally a third suction line (9) with a throttle (10),
(viii) a first pinch valve (11) at the first suction line (6),
(ix) a second pinch valve (12) at the second suction line (8),
(x) a waste container (13), connected to the first suction line (6), second suction line (8), and optional third suction line (9), and to the controlled vacuum pump (4),
characterized by that the first pinch valve (11) and the second pinch valve (12) are coupled in an anti¬parallel manner,
wherein the antiparallel coupling takes place such that the first and the second pinch valves (11, 12) are formed by pinch elements that are respectively attached on two gear racks (14, 15), and the two gear racks (14, 15) are coupled to each other by means of a gear wheel (16), so that they are moved for an antiparallel movement,
wherein one or more position sensors (19) provided at the gear wheel (16) and/or the two gear racks (14, 15), which enables, at any point of time, an absolute determination of a position of the gear wheel (16) and the two gear racks (14, 15) moved thereby,
wherein the gear wheel (16) is driven by a motor-gear combination which is selected such that a speed of travel of the two gear racks (14, 15) is maximum in the phases, in which there is no contact of the pinch elements or the two gear racks with a tube to be pinched and that a reduction of the speed of the two gear racks to 50% in the last 10 to 20% of the travel, until the tube is completely pinched, is performed, and
wherein the motor-gear combination driving the gear wheel (16) which in turn move the two gear racks (14, 15) provides a speed-of-travel profile, in which for a short travel before the tube contact, the speed of travel is reduced, and at an occasion of tube contact of one of the two gear racks an increase of speed of travel occurs, with a subsequent continuous reduction to zero in the position, in which the tube is completely pinched.