Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1998-02-24
1999-10-19
McDermott, Corrine
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604131, A61M 100
Patent
active
059680148
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an injection method and apparatus capable of operating continuously.
In certain medical applications or certain medical examinations, such as radiological scanning (using X-rays or nuclear magnetic resonance (NMR)), it is necessary to inject the patient.
In some cases the injection must be performed continuously on the same patient, and in other cases the apparatus must be quickly reusable so as to make it possible to pass very quickly from one patient to another, i.e. without any need to reinstall the entire injection apparatus. It is therefore desirable to optimize the time required for preparing injection between patients.
In addition, the injection liquid is sometimes expensive, so it is necessary to have apparatus suitable for limiting losses of liquid during injection, in particular when changing the bottle containing the liquid.
It would be even more advantageous to use all of the contents of an injection bottle over a plurality of patients and to inject each patient with the quantity of liquid that turns out to be necessary during the examination.
The various injection apparatuses that have been in use until now do not satisfy the conditions specified above: the quantity of substance provided has been that required for examination of one patient. In the event of this quantity turning out to be insufficient it has been impossible to add more substance without interrupting injection, and when the quantity has been excessive, the left over substance has had to be discarded because of the risk of contamination.
An object of the injection apparatus of the invention is to remedy the drawbacks of prior art apparatuses as mentioned above.
According to the invention, this object is achieved by the fact that the injection apparatus comprises two independent feed sources of at least one liquid to be injected into a patient via a tube, said injection apparatus comprising, for each feed source, interrupter means for interrupting the flow of the liquid and detection means for detecting that injection of the liquid contained in the feed source has terminated, said interrupter means being controlled by said detection means.
The following advantageous dispositions are also preferably adopted: comprising: upstream injection apparatus constituted by a first feed tube, a second feed tube, and for each of the injection bottles, respective link means, each of the first and second feed tubes being connected by the link means to one of the injection bottles; and downstream injection apparatus comprising a downstream tube and pump means for pumping the liquid, said downstream tube connecting said pump means to the patient; secured to the first and second feeder tubes capable of being connected to the pump means; said downstream injection apparatus returning into said upstream injection apparatus; and means, on the other hand, are interconnected by connection means that simultaneously perform fixing and establish liquid flow.
In another aspect, the invention provides a method in which changeover from one feed source to the other is performed automatically due to the fact that said means for detecting that injection of the liquid contained in the feed source has terminated cause the interrupter means for interrupting the flow of liquid from said feed source to close and also cause the interrupter means of the other feed source to open.
The invention will be better understood and secondary characteristics and advantages thereof will appear on reading the following description of an embodiment given by way of example.
Naturally the description and the drawings are given solely by way of non-limiting indication.
Reference is made to the accompanying drawings, in which:
FIG. 1 is an exploded view in partial section showing the various parts to be interconnected of the injection apparatus of the invention;
FIG. 2 is an enlarged view of certain parts of FIG. 1;
FIG. 3 is a section view of coupling means on line III--III in FIG. 2; and
FIG. 4 is a diagram of the support element on which the parts of FIG. 1
REFERENCES:
patent: 4395260 (1983-07-01), Todd et al.
patent: 5322500 (1994-06-01), Johnson et al.
patent: 5328463 (1994-07-01), Barton et al.
Bouvier Bernard
Neftel Frederic
Debiotech S.A.
McDermott Corrine
Rodriguez Cris L.
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