Surgery – Blood drawn and replaced or treated and returned to body – Constituent removed from blood and remainder returned to body
Reexamination Certificate
2003-08-27
2008-07-15
Zalukaeva, Tatyana (Department: 3761)
Surgery
Blood drawn and replaced or treated and returned to body
Constituent removed from blood and remainder returned to body
C604S006110, C604S004010, C210S645000, C210S739000, C210S741000
Reexamination Certificate
active
07399289
ABSTRACT:
A method and system for the extracorporeal treatment of blood to remove fluid from the fluid overloaded patient is disclosed that non-invasively measures osmotic pressure across a filter membrane of a blood filter. The filter is permeable to water and electrolytes, but not to blood protein. The osmotic pressure indicates the protein concentration in the blood. Osmotic pressure is used to detect when hypotension is about to occur in a patient, as a result of excessive blood volume reduction during treatment of the blood. Using the osmotic pressure measurement as a feedback signal, the rate of fluid extraction is automatically controlled to achieve the desired clinical outcome and avoid precipitating a hypotensive crisis in the patient.
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Gelfand Mark
Levin Howard R.
O'Mahony John J.
CHF Solutions Inc.
Deak Leslie
Nixon & Vanderhye P.C.
Zalukaeva Tatyana
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