Medical Pump

a pump and medical technology, applied in the field of medical pumps, can solve the problems of unsatisfactory pump efficiency and adjustment, and the cutting medium must be completely sterile, and achieve the effect of convenient improvement of cutting performance and simple construction
US20090060764A1Inactive Publication Date: 2009-03-05ERBE ELEKTROMEDIZIN GMBH
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ERBE ELEKTROMEDIZIN GMBH
Publication Date
2009-03-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

Medical pumps for water jet surgery are known. The invention relates to a pump comprising at least two pistons provided with piston rods for displacing the pistons in cylinders and for coupling to a pump actuation device, a cylinder head for closing the cylinders, and valve means for respectively connecting a pressure chamber in the cylinder to at least one fluid inlet and at least one fluid outlet. Said fluid outlet is connected to the fluid inlet in a communicating manner by means of an adjustable pressure regulating valve, in such a way that the pressure in the fluid outlet can be limited to a predetermined maximum value so that operation of the pump can be.
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Description

RELATED U.S. APPLICATIONS

[0001] Not applicable.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

[0002] Not applicable.REFERENCE TO MICROFICHE APPENDIX

[0003] Not applicable.FIELD OF THE INVENTION

[0004] The invention relates to a medical pump, in particular for water jet surgery.BACKGROUND OF THE INVENTION

[0005] Water jet surgery has been used for some time in liver surgery as this organ, like no other, has tissue structures of different firmness (parenchyma, blood vessels and bile ducts) and the applied water jet separates the tissue being cut, yet leaves the blood vessels and bile ducts undamaged. Naturally, a precise control of the cutting pressure is required for this.

[0006] A further problem of water jet surgery is that the cutting medium must be totally sterile (e.g. Ringer solution) as the liquid comes into contact with body tissue in the closest and most intensive way possible. Ordinary problems such as high reliability, simplicity and economic manufacture must also be...

Claims

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