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Methods and apparatus for liquid, gas, and gas plasma sterilization of items. The apparatus includes two chambers and a holder to connectorlessly secure a lumened instrument such that a first portion of the lumened instrument lies in the first chamber and a second portion of the instrument lies in t

Methods and apparatus for liquid, gas, and gas plasma sterilization of items. The apparatus includes two chambers and a holder to connectorlessly secure a lumened instrument such that a first portion of the lumened instrument lies in the first chamber and a second portion of the instrument lies in the second chamber, a liquid medium contained within the two chambers, and pumping means for simultaneously increasing fluid pressure within the first chamber of said container while decreasing fluid pressure within the second chamber of the container in a reciprocating fashion. The pumping means displaces at least a total internal volume of the liquid medium through the lumen for a given highest volume of a lumened instrument during a stroke.

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1. A push/pull reprocessor configured to surge a liquid medium back-and-forth through a lumened instrument, comprising: a) a container having a first chamber and a second chamber, said container having a pressure sensor in each chamber and a holder that connectorlessly secures said lumened instrumen

1. A push/pull reprocessor configured to surge a liquid medium back-and-forth through a lumened instrument, comprising: a) a container having a first chamber and a second chamber, said container having a pressure sensor in each chamber and a holder that connectorlessly secures said lumened instrument such that a first portion of said lumened instrument lies in said first chamber and a second portion of said lumened instrument lies in said second chamber; and,b) pumping means, wherein said pumping means is configured to generate, in response to said pressure sensor in each chamber, a stroke that displaces at least a total internal volume of the liquid medium through a given highest lumen volume of said lumened instrument secured in said container. 2. The push/pull reprocessor of claim 1, wherein said pumping means is configured to generate a substantially constant pressure within both chambers of said container in response to said pressure sensor. 3. The push/pull reprocessor of claim 1, further including a baffle plug that allows flow between the lumened instrument being held and an opening of the plug, thereby creating a turbulent flow to clean the lumened instrument exterior. 4. A push/pull reprocessor configured to surge a liquid medium back-and-forth through a lumened instrument, comprising: a) a container having a first chamber and a second chamber, said container having a pressure sensor in each chamber and a holder that connectorlessly secures said lumened instrument such that a first portion of said lumened instrument lies in said first chamber and a second portion of said lumened instrument lies in said second chamber; and,b) pumping means, wherein said pumping means is configured to vary its motor speed as needed in response to said pressure sensor in each chamber to ensure that a pressure within each chamber remains substantially constant during said surge of the liquid medium back-and-forth completely through the lumened instrument. 5. The push/pull reprocessor of claim 4, further including a baffle plug that allows flow between the lumened instrument being held and an opening of the plug, thereby creating a turbulent flow to clean the lumened instrument exterior.