Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-09-29
1996-08-27
Hirsch, Paul J.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
A61M 5142
Patent
active
055495621
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The subject of the present invention is an autonomous apparatus for injecting a patient by infusion of a liquid contained in an infusion bag, the device including means for expelling the liquid from the said bag and for injecting it into the patient.
An application will be described hereinbelow for human infusion. It will be understood that the device of the invention may also find an application in the veterinary field.
The problem posed consists of injecting a patient, in general but without limitation at the scene of a road accident or other casuality, with a liquid by infusion. In general, the liquid is a biological liquid making it possible to compensate for the various water losses of the patient (for example a state of shock).
Conventionally, the liquid is contained in an infusion bag suspended from a bracket, or held by hand at least temporarily by the personnel administering treatment, from which it flows simply by the effect of gravity.
Although this configuration is perfectly functional in a hospital environment, the same is not true during emergency assistance, especially outdoors, for example at the time of road or other accidents.
To this end, a certain number of autonomous infusion devices have already been proposed, directly joined to a limb of the patient (arm or leg) or suspended therefrom by some means (belt clip, etc.).
None of tile known devices is entirely satisfactory.
Thus, in document FR-2,561,923, a device of this type is proposed, in which the infusion liquid is expelled from a bag by a piston actuated by a spring.
This device has the drawback of resorting to non-standard infusion bags and of exerting on the bag a pressure (force) which is not constant and which does not permit an even flow rate of the infusion liquid.
Similarly, document FR-2,570,949 describes a device of the same type for a standard infusion bag, in which the liquid is expelled by compressed air pressure. The bag is arranged in a leaktight chamber. It has not yet been possible to use these devices suitably, because of problems of leaktightness and regulation of the flow rate of the gas pressure.
Such devices furthermore require a pressure reducer and are therefore relatively expensive.
SUMMARY OF THE INVENTION
It is the object of the present invention to overcome these various drawbacks of the devices of the prior art, by allowing: and operating under the following conditions:
The objectives obtained with an autonomous apparatus for injecting a patient by infusion of a liquid contained in an infusion bag, the device including means for expelling the liquid from the bag and for injecting it into the patient, wherein the expulsion means includes a plate on which the infusion bag is arranged, the plate being arranged in a box fitted with a lid which can be folded down onto the plate. The plate is pressed by an elastic means primed by closing the lid and which tends to push the plate back toward the lid so as to expel the liquid from the infusion bag.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood with the aid of the description given hereinbelow of one embodiment, given by way of non-limiting example, with reference to the attached drawings, in which:
FIG. 1 is a view of the device of the invention in side elevation, with the lid open;
FIG. 2 is a perspective view of the elastic pressing means of the plate.
DETAILED DESCRIPTION OF THE INVENTION
The infusion device, generally labelled (1), essentially comprises:
The elements linked with the injection of the product have not been represented.
In operation, the infusion bag is arranged on the plate and the lid (4) is closed using the handle (7). This simple movement primes the mechanism (6) which, by virtue of the elastic means, tends to push the plate back (upward) in order to expel the liquid to be infused from the bag (which is sandwiched between the plate and the lid).
The mechanism (6) will now be described with reference to FIG. 2.
The mechanism is composed of four arms (8, 9, 10, 11) articulated
REFERENCES:
patent: 3565292 (1971-02-01), Jinotti
patent: 3734351 (1973-05-01), Gaudin
patent: 3895741 (1975-07-01), Nugent
patent: 4157771 (1979-06-01), Smith
patent: 4504267 (1985-03-01), Parmelee et al.
patent: 4557728 (1985-12-01), Sealfon et al.
patent: 5328477 (1994-07-01), Sitko
Boisson Michel
Piclin Jean-Jacques
Thibaut Gilbert
A.D.E.C.E.F.
Hirsch Paul J.
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