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After many years
of experience in designing I/A systems I know that no other system
allows such subtle flow control like a state of the art peristaltic
pump does. On the other hand, the simplicity of a venturi system
is convincing and nothing matches its responsiveness and instant
vacuum power. Since both, flow and vacuum control, have their merits
for different surgical manoeuvres and techniques, we decided to
make the two systems available in their genuine form on the OS3,
switchable at any time during surgery. Quite a difficult
task! Especially because I also wanted to combine this with direct
non contaminating sensing of vacuum in the peristaltic mode.
It took me months
to design and optimalize the key elements for this: a twin pump
and a venturi/ peristaltic hybrid cassette with a novel integrated
sensor element. I always kept the operating staff and the surgeons
in my mind who shall enjoy simplicity of handling and who shall
benefit from perfect AC stability and responsiveness. Too bad, few
people only will be able to imagine how much creativity and efforts
were put into this unique design. But what looks simple at the end,
is always the result of a long process of refinement.
OS3 I/A system
with venturi and peristaltic pump, cassette, valves, pressure sensor
and liquid level detector
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