A medical lavage apparatus for body cavities comprising a housing having parallel irrigation and aspiration cylinders with captive plungers extending in bores thereof from a first end and pairs of check-valves positioned in parallel, smaller, offset cylinders located at second ends such that reciprocal...http://www.google.de/patents/US5667500?utm_source=gb-gplus-sharePatent US5667500 - Medical lavage apparatus and methods
