Unlock instant, AI-driven research and patent intelligence for your innovation.

Device and method for transporting medicinal liquids

A technology for transporting fluid and volume, which is applied in the field of equipment for transporting medicinal fluids, and can solve problems such as high equipment costs and inability to achieve accuracy.

Active Publication Date: 2008-06-18
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accuracy in this range also cannot be achieved with better calibration due to dependence on input and output pressure and on existing time drift
[0008] This leads to the problem of requiring special pumps to ensure accuracy especially for small delivery volumes, which would involve the disadvantage of higher equipment outlays

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for transporting medicinal liquids
  • Device and method for transporting medicinal liquids
  • Device and method for transporting medicinal liquids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] FIG. 3 shows the error characteristic of a diaphragm pump with a maximum delivery volume of 1200 μl per stroke. The change in the curve shows the deviation of the delivery volume in μl from the desired delivery volume as a function of the desired delivery volume in μl. The iso-error lines show deviations of 1% of the delivered volume from the expected delivered volume, for upper (+1%) and lower (-1%) deviations.

[0035] FIG. 3 shows that in the case of a larger expected delivery volume, the deviation of the actual value from the expected value is relatively small, so that the accuracy of the delivery is satisfactory.

[0036] Figure 3 also shows that inaccurate delivery is obtained especially in the range below 600 μl. The accuracies obtained here lie in the range of the +1% equal error line.

[0037] In the desired delivered volume range of below 200 μl and above 300 μl, the sucked-in volume is discharged in a single delivery stroke, which corresponds to the aforement...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A device and a method for delivering fluids, preferably for delivering medical fluids, such as in the field of dialysis, include at least one pump designed as a displacement pump and at least one control unit that controls the operation of the pump. The pump is actuated by the control unit such that during a suction stroke in a first operating condition the pump takes in a volume exceeding a desired delivery volume for the purpose of discharging a desired delivery volume, and discharges portions of the volume taken in by performing a plurality of partial delivery strokes in the form of partial volumes which are smaller than the volume taken in.

Description

technical field [0001] The invention relates to a device for conveying fluids, preferably pharmaceutical fluids, comprising at least one pump designed as a displacement pump and at least one control unit for controlling the operation of the pump. Background technique [0002] Positive displacement pumps are known to be used in many fields, for example in the field of medical engineering. Dialysis machines are known, for example, in which the dialysate is prepared with the aid of a positive displacement pump. In such dialysis machines, the dialysate is prepared from ultrapure water (RO water) and one or more concentrates containing the required electrolytes and other components. Ultrapure water and concentrate are mixed in the proper ratio. The mixing ratio between ultrapure water and concentrate can be, for example, approximately 34:1 or 44:1. Of course other ratios are also conceivable. [0003] Concentrate delivery is often carried out by means of diaphragm pumps opera...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F04B13/00F04B43/02A61M1/16F04B49/06
CPCF04B13/00A61M1/1656
Inventor 阿尔弗雷德·加格尔彼得·伊姆霍夫
Owner FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH