Surgery – Means for introducing or removing material from body for... – Material introduced into and removed from body through...
Patent
1996-05-31
1998-10-27
Mendez, Manuel
Surgery
Means for introducing or removing material from body for...
Material introduced into and removed from body through...
604140, A61M 100
Patent
active
058272194
ABSTRACT:
The present invention provides a number of pumping systems and injection systems particularly useful for injecting a liquid medium into a patient. In general, the pumping systems comprise a removable pumping unit. The removable pumping unit includes means for pressurizing the liquid medium via the rotational displacement of the liquid medium. The present invention also provides a pumping system comprising a pumping unit for pressurizing the liquid medium and a feedback-controlled drive means in connection with the pumping unit for providing a controlled powered drive to the pumping unit. The pumping system further comprises a flow meter for measuring the flow rate of the pressurized liquid medium exiting the pumping system and control means in communicative connection with the drive means for providing a control signal to control the powered drive provided to the pumping unit. The control means is suitable to receive a feedback signal from the flow meter corresponding to the flow rate of the pressurized liquid medium exiting the pumping unit. The control signal provided to the drive means is a function of the feedback signal.
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Havrilla Joseph B.
Hirschman Alan D.
Uber, III Arthur E.
Bradley Gregory L.
Medrad Inc.
Mendez Manuel
Stubenvoll Gretchen Platt
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