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US 2020/0138560 A1Published application
Flow modification in body lumens
AssigneeNephronyx Ltd.
InventorsSagy KARAVANY, Eyal TEICHMAN
Life of this patent
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Abstract
The devices and methods described herein include an implantable body lumen fluid flow modulator including an upstream flow accelerator separated by a gap from a downstream flow decelerator. The gap is a pathway to entrain additional fluid from a branch lumen(s) into the fluid stream flowing from the upstream flow accelerator to the downstream flow decelerator.
Claims21
1-24. (canceled)
A device for altering fluid flow through a body lumen coupled to a branch lumen, the device comprising:
- a flow modulator configured to be positioned within the body lumen, the flow modulator comprising an upstream diverging portion, an upstream nozzle, and a downstream diffuser, the upstream nozzle having an inlet, an outlet, and a cross-sectional flow area that converges from the inlet towards the outlet, the downstream diffuser having an entry, an exit, and a cross-sectional flow area that diverges from the entry towards the exit, the flow modulator defining a gap between the inlet of the upstream nozzle and the exit of the downstream diffuser,
- wherein the flow modulator is configured to receive a fluid stream through the upstream diverging portion, accelerate the fluid stream passing through the upstream nozzle towards the downstream diffuser to generate a low pressure region in a vicinity of the gap and to entrain additional fluid from the branch lumen into the fluid stream as the fluid stream passes into the entry of the downstream diffuser.
A method for altering fluid flow through a body lumen coupled to a branch lumen, the method comprising:
- positioning a flow modulator within a body lumen, the flow modulator comprising an upstream diverging portion, an upstream nozzle, and a downstream diffuser, the upstream nozzle being positioned in a first body lumen portion and having an inlet, an outlet, and a cross-sectional flow area that converges from the inlet towards the outlet, the downstream diffuser being positioned in a second body lumen portion and having an entry, an exit, and a cross-sectional flow area that diverges from the entry towards the exit, the flow modulator defining a gap between the inlet of the upstream nozzle and the exit of the downstream diffuser;
- receiving a fluid stream through the upstream diverging portion;
- and
- accelerating the fluid stream passing through the upstream nozzle towards the downstream diffuser to generate a low pressure region in the vicinity of the gap and to entrain additional fluid from the branch lumen into the fluid stream as the fluid stream passes into the entry of the downstream diffuser.
1 more element
Dependencies are inferred from the claim text.