Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-07-06
1996-01-02
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604126, 604151, A61M 3700
Patent
active
054803861
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a pump assembly for medical use, more specifically a portable pump or even micropump, designed for the patenreval ministration of medicamentous solutions.
BACKGROUND OF THE INVENTION
Since several years already, various types of pumps or micropumps for medical use are known. The so-called portable micropumps are particularly appreciated in the therapeutic treatment of patients such as those suffering from diabetes or cancer, who must receive permanently, or at least during extended periods of time, a controlled dose of a medicamentous substance administered continuously. The so-called peristaltic pumps or micropumps have been developed for such a use and are described in the specialized literature.
The patent application FR-A-89 04044 describes such a type of micropump. The same includes two separate modules, the so-called "motor" module which cannot be sterilized and which includes the motor and its control circuitry and the so-called "pump" module itself which can be sterilized and which includes a rotor provided with rollers, a tube and a pressing device cooperating with the rollers for pressing flat said tube. These two modules are assembled in a reversible manner.
The patent application EP-A 447 909 describes a model of a similar micropump, of which one main feature is the irreversible assembling of a "container" module and of a "motor" module. This micropump model further includes various safety systems which assist in ensuring asepsis during administration of the medicamentous solution to the patient, as well as in preventing any operating error by the patient himself. As illustrated in EP-A 0 447 909, the module including the container intended for the medicamentous solution has as a characteristic feature of the micropump, a filling orifice accessible to the user when the two modules are separated, but which is thereafter inaccessible to said user when said modules are assembled irreversibly. Subsequent access to the medicamentous solution is thus totally prevented, as well as any later contamination of this solution after it has been filled in a sterile manner into the storage container and this during the whole period of functioning of the micropump.
Although practice shows that this type of safety fulfils perfectly well its role once the micropump is in operation, the problem still remains of maintaining asepsis during the extemporaneous filling of the "container" module. The filling of such a module poses no real problem in a hospital environment, where trained staff and appropriate installations are available, such as for example a laminar flow hood or clean room; however, the filling by the patient himself, who cannot be expected to have the skill required, is another matter when a complete asepsis must be maintained during this operation and any accidental contamination of the medicamentous solution must be avoided. The invention provides a solution, which is new, original and technically reliable, to the problem described above.
SUMMARY OF THE INVENTION
Accordingly, an object of the invention is more particularly a portable pump assembly for the parenteral administration of medicamentous solutions including a first module provided with a storage container for the medicamentous solution, an orifice for filling said container and an outlet orifice for taking said medicamentous solution outside the pump, said first module being arranged to cooperate with a second module provided with a motor and with pumping means, the operation of the pump being ensured by the assembling of said first and second modules, said assembly being characterized in that the filling orifice of the storage container is provided with a removable filtering and sterilizing device.
In one particular embodiment of the invention, said pump can be of very small dimensions and weigh only a few grams, or at the most, several tens of grams. In such a case, the pump will more generally be referred to as being a "micropump"; a micropump according to the invention is particula
REFERENCES:
patent: 4360019 (1982-11-01), Portner et al.
patent: 4487603 (1984-12-01), Harris
patent: 4684365 (1987-08-01), Reinicke
patent: 4685902 (1987-08-01), Edwards et al.
patent: 4758225 (1988-07-01), Cox et al.
patent: 5266013 (1993-11-01), Aubert et al.
Brohy Michael
Neftel Frederic
Debiotech SA
Rosenbaum C. Fred
Wilkens III Frank
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