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

Inactive Publication Date: 2009-03-05
ERBE ELEKTROMEDIZIN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The invention provides a medical pump, in particular for water jet surgery, which despite simple construction and suitability for single use facilitates improved cutting performance.

Problems solved by technology

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 considered.
The pump efficiency as well as its adjustment, however, are unsatisfactory.

Method used

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Embodiment Construction

[0028]The same reference numbers will be used for the same parts and parts with the same function.

[0029]A pump actuation device 10 is intended for the embodiment of the invention shown in FIG. 1, which encompasses a motor control 15 for the control of two motors 11,11′, which are connected via gearing 12, 12′ and clutch devices 13, 13′ to the piston rods 25,25′. One operator B can operate the motor control 15 with suitable switches (foot switch or finger switch), so that the motors 11, 11′ displace the piston rods 25, 25′ and thus the pistons 22, 22′ in the cylinders 21, 21′ of pump unit 20 alternately via the described train, so that the volume of the pressure chambers 16, 16′ of the pump unit 20 is alternately enlarged and reduced.

[0030]In order to seal the pressure chambers 16, 16′ and the pistons 22, 22′ in relation to the cylinders 21, 21′ seals 23, 23′ are provided at the pistons 22, 22′. Moreover, the piston rods 25, 25′ maintain sterility with cup seals 24, 24′, which are fi...

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PUM

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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.

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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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B19/02A61B17/32A61M1/00F04B1/16F04B49/22
CPCA61B17/3203F04B53/007F04B49/035F04B1/02
Inventor MITZLAFF, LOTHARKUEHNER, RALFHAGG, MARTINQUECK, JOCHEN
Owner ERBE ELEKTROMEDIZIN GMBH
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