Surgery – Container for blood or body treating material – or means used... – Bag type
Patent
1982-11-24
1988-12-13
Yasko, John D.
Surgery
Container for blood or body treating material, or means used...
Bag type
604415, A61B 1900
Patent
active
047908416
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for bag-shaped liquid containers for sick care of flexible material consisting of one or more flat plastic films fused at the edges or a folded-over fused plastic film, and comprising at least one opening for filling or emptying the container.
This type of liquid container is used for a number of different purposes in sick-care, e.g. for administering intravenously nutrients and blood substitute. These areas of use involve the storage and tapping of liquid. These liquid containers are provided with filling and tapping openings, which have the shape of a flanged funnel. This type of opening facilitates filling the container with liquid, which is usually done under sterile conditions at the supplier of the liquid in question. After filling the container, it is sealed by means of a suitable type of plug, which for use permits access by means of a cannula to the contents of the container. In order to prevent contamination of the cannula as it is inserted into the medium in the container, up to now a sealing device has been used which is provided under a cover with a sealing, sterile membrane. After removing the cover, the cannula can be inserted into the liquid in the container by puncturing the membrane thereby avoiding contact with non-sterilized surfaces. With this type of sealing device, it has proved difficult to find the cannula insertion hole with the cannula behind the membrane directly after puncture. Furthermore, the cover covering the opening provided with a membrane to the container is difficult to remove. Manufacturing considerations make it necessary that the sterilization of this type of sealing device be carried out in several stages, since it is made of three different parts which are fused together into one part, which involves relatively high manufacturing costs.
The purpose of the present invention is to remove the disadvantages which are to be found in previously used sealing devices of this type and to achieve a device which is essentially characterized by a disc formation sealing the opening and having a tube made in one piece therewith and extending towards the interior of the container, one end of said tube terminating in an integrally made cover which seals against the outside of the disc formation level therewith, the other end of said tube terminating in a closing portion by means of a flattening of the tube, for achieving a sterile space between the two closed ends of the tube.
By virtue of the invention a device is now achieved which eminently achieves its purposes but is at the same time simple and inexpensive to manufacture. One reason for this is that the sealing device according to the invention is made in one piece and sterilization need only be done once during manufacture, since the material at the flattened end of the tube permits the passage of steam. The design of the cover permits easy and reliable removal of the same for use, i.a. because the straight pulling of the pull loop provides a concentration of force to a point in the material in the region between the lower edge portion of the cover and the disc formation. After removing the cover, a cannula can be easily inserted into the liquid in the container by virtue of the fact that prior to the puncturing of the portion of the tube near the inner flattened portion, which has a thinner material thickness, the cannula is guided through the sterile space by the sidewalls of the tube. After puncture, the cannula is effectively retained in its inserted position in the sealing device according to the invention by the friction created between the cannula and the tube by firstly the projections at the mouth of the tube and secondly at the hole produced by the cannular when penetrating through the tube wall next to the flattened portion.
The invention will be described in more detail below with reference to the accompanying drawing, in which an embodiment selected as an example of the sealing device is shown
in FIG. 1 in perspective and
in FIG. 2 as a side-view of the sealing device mo
REFERENCES:
patent: 2689562 (1954-09-01), Adams et al.
patent: 3606077 (1971-09-01), Faust
patent: 3915212 (1975-10-01), Bujan et al.
patent: 4187893 (1980-02-01), Bujan
patent: 4298045 (1981-11-01), Weiler et al.
patent: 4303067 (1981-12-01), Connolly et al.
patent: 4439192 (1984-03-01), Leurink
Kers Tore
Lundh Karl-Erik
Gislaved Plastindustri AB
Yasko John D.
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