Apparatus and method for automatically controlling hemodialysis at a pre-selected ultrafiltration rate
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United States of America Patent
Stats
-
Jun 24, 1980
Grant Date -
N/A
app pub date -
Nov 6, 1978
filing date -
Nov 6, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus for and method of automatically controlling the quantity and rate of liquid removed from blood during hemodialysis. The apparatus supplies dialysate in a single pass system in a closed, controlled volume circuit which includes an above atmospheric pressure portion and a below atmospheric pressure portion. The above atmospheric pressure portion includes a pair of chambers for alternate supply to and removal of the dialysate from the below atmospheric pressure portion which contains an artificial kidney and a third means for removing fresh dialysate from the above atmospheric pressure portion; the below atmospheric pressure portion includes means which isolates the kidney containing portion and restores pressure to spent dialysate to a pressure at least equal to or higher than the pressure of the dialysate fed into said closed circuit; the above atmospheric circuit also includes means for removing gas from the spent dialysate prior to filling the spent dialysate removal chamber before discard.
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