US 12,121,669 B2
Assisted fluid drainage system
Eric A. Rehm, Lawrenceville, GA (US)
Assigned to C. R. Bard, Inc., Franklin Lakes, NJ (US)
Filed by C. R. Bard, Inc., Franklin Lakes, NJ (US)
Filed on Jul. 12, 2021, as Appl. No. 17/373,568.
Claims priority of provisional application 63/065,917, filed on Aug. 14, 2020.
Prior Publication US 2022/0047842 A1, Feb. 17, 2022
Int. Cl. A61M 25/00 (2006.01)
CPC A61M 25/00 (2013.01) [A61M 25/0017 (2013.01); A61M 2025/0019 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A fluid drainage system, comprising:
a catheter configured to drain a fluid from a patient;
a collection container configured to remain external to the patient; and
a drainage tube configured to remain external to the patient and defining a lumen, configured to provide fluid communication between the catheter and the collection container, and including:
a distal ejector pump disposed in-line with the lumen proximate the catheter; and
a proximal ejector pump disposed in-line with the lumen proximate the collection container,
wherein the distal ejector pump or the proximal ejector pump is configured to urge the fluid through the drainage tube while the drainage tube remains in fluid communication with the catheter,
wherein the distal ejector pump or the proximal ejector pump includes a converging section, a diffuser section, and a diverging section,
wherein a diameter of the diffuser section is less than a diameter of one of the converging section or the diverging section,
wherein the diverging section includes a stepped expansion portion, and
wherein a drive nozzle provides a drive fluid at the stepped expansion portion.