Devices and methods for treating edema
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United States of America Patent
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Aug 15, 2023
Grant Date -
Sep 3, 2020
app pub date -
Feb 26, 2020
filing date -
Feb 26, 2019
priority date (Note) -
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Abstract
The disclosure relates to devices and methods for the treatment of edema using a purge-free system. The invention provides devices and methods useful for treating edema by means of an indwelling catheter that is placed in a blood vessel of a patient and used to pump blood to cause a decrease in pressure at an outlet of a lymphatic duct. The catheter pumps blood by means of an impeller but is purge-free in that the catheter does not include a system for purging or flushing catheter components with a purge fluid. The purge-free catheter avoids blood-related mechanical complications such as clotting or thrombosis by means of an impermeable sleeve or shroud that protects moving parts of the impeller drive system.
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