Fluent material handling – with receiver or receiver coacting mea – Filling means with receiver or receiver coacting means – With receiver and supply securing means
Patent
1998-08-27
2000-03-21
Douglas, Steven O.
Fluent material handling, with receiver or receiver coacting mea
Filling means with receiver or receiver coacting means
With receiver and supply securing means
141329, 604416, B65B 104
Patent
active
06039093&
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an adapter for drawing a liquid from a container that is sealed with a plug or for filling this container, which is sealed using a plug that is attached by a flange cap, with at least one partially hollow mandrel that is equipped with at least one nozzle on the front end to penetrate the plug, a connecting part with an inner cone on the rear end for hooking up medical devices, and a flat gripping element in the intermediate area for facilitating the adaptation process.
Such adapters or drawing cannulae, cf. EP 0 499 481 A1 and WO 93/24095, are used in the medical field to make it possible to connect commercially available infusion instruments, i.a., to infusion flasks. To do this, the adapters generally have a lockable cone connection according to DIN 13 090, Part 2. The connecting of the infusion instruments to the infusion flasks is done by skilled personnel, who do not have any problem in penetrating the sealing plug of the infusion flasks with the adapter or in coupling the instruments to the adapter. For an individual who is not proficient, however, it is very difficult to couple the infusion flask to the adapter. In the case of an adapter that engages behind the flange cap of the infusion flask with the aid of locking elements, the mandrel must penetrate the rubber plug at the instant when the locking elements also come to rest on the edge of the flange cap so that these elements can be pressed outward. It is precisely in the initial phase of the penetration, i.e., when a great deal of force is required, that the opened-out locking elements are found to be quite unstable on the upper outside edge of the flange cap, with the adapter and infusion flask being held together in a straight and aligned configuration. If the operator shakes even slightly, the alignment between adapter and container will be lost. As a result, at least one locking element will be bent far outward and may break off, while generally at least one locking element will return to its initial position and will tilt, thus preventing it from being pushed back into position.
If, for example, a partial amount is to be drawn up into a syringe from an infusion flask, an adapter is not used. Rather, a cannula is pushed onto the syringe, with which the sealing plug of the infusion flask is pierced. This procedure requires a certain routine and a steady hand. In addition, the suctioning-off of the liquid via the cannula is done relatively slowly since the free cross-section of the cannula is very small.
The drawing of medical preparations whose active ingredients are present as lyophilizates is particularly problematical. For example, motor-disrupted MS patients require such preparations for self-medication. Such a medicine is stored in two infusion flasks of size R2. The first infusion flask contains a common salt solution, while the second infusion flask contains the lyophilizate. Up until now, the patient has drawn the common salt solution from the first infusion flask with a disposable syringe with an attached cannula. He has injected the syringe contents into the second infusion flask. Here, attention must be paid to ensuring that the common salt solution does not directly strike the lyophilizate since otherwise clumping is unavoidable. After a shaking process, the solution that consists of common salt solution and lyophilizate is drawn from the second infusion flask and then is finally administered.
An adapter that is known from WO 95/07066 offers an aid for attaching the disposable syringe to the infusion flask. This adapter is attached to the infusion flask as a guide for the disposable syringe. The cannula of the disposable syringe penetrates the closure of the infusion flask with a straight thrust into the adapter. A patient who is unskilled in handling syringes or a motor-disrupted patient will find it hard not to tilt the disposable syringe when inserting it into the adapter. Tilting results in breaking of the cannula. Even if the cannula is inserted into the infusion flask correctly, the above-mentioned
REFERENCES:
patent: 4927423 (1990-05-01), Malmborg
patent: 5454409 (1995-10-01), McAffer et al.
patent: 5464123 (1995-11-01), Scarrow
patent: 5526853 (1996-06-01), McPhee et al.
patent: 5641010 (1997-06-01), Maier
Graf Bernd
Mrotzek Werner
Schonke Ingoberth
Douglas Steven O.
Schering Aktiengesellschaft
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