Method and apparatus for sterilization of a centrifugal pump
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United States of America Patent
Stats
-
Feb 17, 1987
Grant Date -
N/A
app pub date -
Sep 10, 1984
filing date -
Sep 10, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A centrifugal blood pump has a face seal between a pump housing wall and a hub of an impeller which provides upon assembly a gas permeable seal at a seal interface surrounding a shaft defining the rotational axis of the impeller. This seal separates a blood pumping chamber from a separate chamber housing lubricants and bearings for impeller rotation. Prior to rotation of the impeller, the blood pump is sterilized by exposure to ethylene oxide gas which passes through the gas permeable seal interface to also sterilize the interior of the bearing chamber in the pump. Upon rotation of the impeller, the seal interface, which is perpendicular to the axis, is converted to a gas and liquid impermeable seal.
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