Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-01-13
1995-03-07
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 93, 604132, A61M 3700, A61M 1100
Patent
active
053953240
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an apparatus for the reliable filling of at least two containers below the skin surface, particularly of an infusion pump with at least one septum.
Implantable infusion pumps are used for the continuous delivery of medicaments, e.g. morphines in a constant dosage over long periods of time. Compared with conventional injections they have the advantage that there is no longer any need to overdose to such an extent that despite the decomposition of the medicament up to the next administration time, there is no drop below a certain minimum dose and instead it is possible to achieve a uniform and significantly reduced supply of the medicament.
SUMMARY OF THE INVENTION
Increasingly more frequently the possibility is provided of administering with a syringe in a container of the infusion pump a so-called bolus dose, which then passes to the desired location via an already fitted catheter of the infusion pump. The aim of said bolus dose is to administer, under specific medical conditions, an increased medicament quantity for a short time and subsequently the infusion pump resumes its normal activity.
Up to now problems have been encountered on filling the containers in the body. At present it is not possible to completely reliable prevent a person introducing a new filling into the infusion pump from reaching the incorrect container, namely that for the bolus dose, so that the patient carrying the infusion pump receives his e.g. monthly dose as a bolus dose, which can in extreme cases be life-threatening.
The problem of the invention is to provide an apparatus for avoiding such problems and to ensure a reliable refilling.
According to the invention this is achieved in that two septa made from a soft material are provided and which can be easily perforated by needles and following which there are further seals or packings. In each case a space between the seals is linked with the catheters or containers to be filled. In the case of different septa said spaces are at different distances from the needle stop. A corresponding number of needles with lateral openings for filling purposes are provided, the openings for the different needles are constructed at different distances from the tip or point of the needles.
A preferred embodiment of the invention is described hereinafter together with its advantages and further features, by means of the subclaims, the specific technical description and the single drawing showing an infusion pump in sectional form and having two different needles for the refilling of the medicament container and for bolus dosing via the particular septa.
DESCRIPTION OF THE DRAWING
FIG. 1 is a side sectional elevational view of the device of this invention .
DETAILED DESCRIPTION OF THE INVENTION
The drawing shows the casing 10 with the two flattened and rounded shoulders 12, 14 projecting upwards from the casing and which serve to receive the septa 16, 18 and the needles 20, 22 to be used. It is possible to clearly see the two different distances A and B for the lateral openings of the needles 20, 22 with respect to the tip of the latter.
The fixing rings 24 on the casing bottom 26 are only shown from the side. They are positioned in such a way that it is possible to sew with a minimum thread length, so that the infusion pump cannot slip. From said infusion pump passes a catheter 28 to the location where the medicament is to be delivered, e.g. the vertebral column.
As a function of the desired delivery and the size of the infusion pump it will only be filled at long intervals, typically of one month. For this purpose use is made of the special needles 20, 22, which can pass in splinter-free manner through the silicone rubber septa 16, 18 provided in the cover 10. The opening of the said needles 20, 22 is not at the tip, but on the side at different distances from the tip.
The septa 16, 18 rest within the shoulders 12, 14, so that they can be felt from outside the skin. Confusion, e.g. resulting from the incorrect positioning of the inf
REFERENCES:
patent: 4692146 (1987-09-01), Hilger
patent: 4892518 (1990-01-01), Cupp et al.
patent: 4955861 (1990-09-01), Enegren et al.
patent: 4978338 (1990-12-01), Melsky et al.
patent: 5167638 (1992-12-01), Felix et al.
PCT Application--Pub. No. WO89/10157, Nov. 2, 1989, Inventers: Enegren et al.
PCT Application--Pub. No. WO89/10149, Nov. 2, 1989, Inventers: Melsky et al.
Hinrichs Jurgen
Otto Karl-Heinz
Anschutz & Co. GmbH
Larson Herbert W.
Wilkens III Frank
Yasko John D.
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