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Medical pump

A technology of medical pumps and pistons, which is applied in the field of medical pumps, can solve problems such as efficiency regulation not meeting the requirements, and achieve the effects of economical manufacturing costs, easy manufacturing, and high operational safety

Inactive Publication Date: 2007-06-13
ERBE ELEKTROMEDIZIN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the efficiency of the pump and its regulation do not meet the requirements

Method used

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Embodiment Construction

[0026] The same reference numerals will be used for the same components and components with the same functions.

[0027] A pump drive 10 is used for the embodiment of the present invention as shown in FIG. 13' is connected to piston rods 25, 25'. The operator B can operate the engine controller 15 with the appropriate switch (foot switch or hand switch) so that the engine 11, 11' moves the piston rods 25, 25' and thus alternately moves the cylinders 21, 21 of the pump unit 20 'Inside the pistons 22, 22', so that the volume of the pressure chambers 16, 16' of the pump unit 20 expands and contracts alternately.

[0028] In order to seal the pressure chambers 16, 16' and the pistons 22, 22' relative to the cylinders 21, 21', seals 23, 23' are provided on the pistons 22, 22'. Furthermore, the piston rods 25, 25' are maintained hygienically by means of cup seals 24, 24'; , 25'. Thus, without the cup seals 24, 24', bacteria from the ambient air stay on the inner walls of the cyl...

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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 devices 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 pre-definable maximum value. In this way, the inventive medical pump can be easily regulated.

Description

technical field [0001] The invention relates to a medical pump, especially a medical pump used in water jet operation. Background technique [0002] Waterjet surgery has been used for some time in liver surgery because the liver, unlike other organs, has tissue structures of varying degrees of firmness (soft tissue, blood vessels, and bile ducts) that are used to cut and separate said tissue without damaging it blood vessels and bile ducts. Of course, precise control of the cutting pressure is required for this. [0003] A further problem with waterjet surgery is that the cutting medium must be perfectly hygienic (eg Ringer's solution) when the fluid contacts body tissue in as close and intense a manner as possible. General issues such as high reliability, simplicity and low manufacturing cost must also be considered. [0004] Medical pumps for waterjet surgery are known from US 6,216,573 B1 and DE 203 09 616 U1, where the medical pumps are interchangeable and are thus on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/32A61M1/00F04B1/16F04B49/22
CPCF04B49/035A61B17/3203F04B1/02F04B53/007
Inventor 洛塔尔·米茨拉夫拉尔夫·屈纳马丁·哈格约亨·奎克
Owner ERBE ELEKTROMEDIZIN GMBH
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