DK146777B

DK146777B - PROCEDURE FOR MANUFACTURING A STERILY PACKAGED HOSE OF SILICONE RUBBER, INSERT A CATHETER, WITH A LAST SLOW BURNING

Info

Publication number: DK146777B
Application number: DK416280A
Authority: DK
Inventors: Leif Thorlak
Original assignee: Leo Pharm Prod Ltd
Priority date: 1980-10-02
Filing date: 1980-10-02
Publication date: 1984-01-02
Also published as: DK416280A; DK146777C

Description

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Opfindelsen angår en fremgangsmåde til fremstilling af en sterilt emballeret slange af siliconegummi, især et kateter, med en varig svag krumning under anvendelse af emballagen ved formgivningen.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a method for producing a sterile, silicone rubber tubing, in particular a catheter, with a durable slight curvature using the packaging in the molding.

Det er kendt at formgive et kateter ved hjælp af dets emballage og at sterilisere den lukkede emballage ved varmebehandling, se USA patentskrift nr. Re. 29 343.It is known to design a catheter using its packaging and to sterilize the sealed package by heat treatment, see United States Patent No. Re. 29 343.

Fremgangsmåden ifølge opfindelsen er ejendommelig ved, at slangen anbringes i emballagen i kraftigt krummet tilstand og strålesteriliseres på en sådan måde, at en del af den kraftige krumning omdannes til den varige svage krumning, når slangen udtages af emballagen.The method according to the invention is characterized in that the hose is placed in the packaging in a strongly curved state and is sterilized in such a way that part of the strong curvature is converted to the permanent weak curvature when the hose is removed from the packaging.

Det er ganske vist kendt i forvejen, at visse plastarter bliver stive ved strålesterilisering, men ved fremgangsmåden ifølge opfindelsen opnår man bevidst en kun svag krumning, når slangen bestråles fikseret i kraftigt krummet tilstand i sin emballage. Man har ikke hidtil benyttet bestråling til opnåelse af en ønsket formtilstand af en genstand, og ved fremgangsmåden ifølge opfindelsen opnås steriliseringen på samme tid som formgivning i én og samme arbejdsoperation.While it is known in advance that certain plastics become rigid by beam sterilization, the method according to the invention deliberately achieves only slight curvature when the hose is irradiated in a strongly curved state in its packaging. So far, irradiation has not been used to obtain a desired mold state of an article, and the method of the invention accomplishes sterilization at the same time as shaping in one and the same operation.

På grund af slangens kraftige krumning bliver emballagen kompakt og derfor billigere at fremstille og mindre pladskrævende at opbevare, end hvis slangen skulle emballeres i sin næsten strakte form med en kun svag krumning.Due to the strong curvature of the hose, the packaging becomes compact and therefore cheaper to manufacture and less space consuming to store than if the hose were to be packaged in its almost stretched form with only a slight curvature.

Opfindelsen skal forklares nærmere i forbindelse med tegningen, hvor fig. 1 viser et kateter med en ifølge opfindelsen frembragt formfiksering beregnet til anbringelse i abdominalhulen, og fig. 2 kateteret anbragt i sin salgsemballage.The invention will be explained in more detail in connection with the drawing, in which fig. 1 shows a catheter having a form fixation according to the invention intended for placement in the abdominal cavity; and FIG. 2 the catheter placed in its sales packaging.

På det i fig. 1 viste kateter 1 er det ønskeligt, at der findes en permanent krumning eller bugt 2, således at kateteret efter anbringelsen hænger omtrent lodret i abdominalhulen.In the embodiment of FIG. 1, it is desirable to have a permanent curvature or bay 2 so that after placement, the catheter hangs approximately vertically in the abdominal cavity.

En sådan kan opnås ved, at man anbringer kateteret 2 146777 som vist i den i fig. 2 viste salgsemballage 3.Such can be achieved by placing the catheter 2 as shown in the embodiment of FIG. 2 sales packaging 3.

I denne findes en rille 4 med et krumt parti 5.In this is a groove 4 with a curved portion 5.

Det usteriliserede kateter 1 anbringes i rillen på en sådan måde, at det parti, hvor man ønsker krumningen eller bugten 2, ligger i emballagens krumme parti 5.The unsterilized catheter 1 is placed in the groove in such a way that the portion where the curvature or bend 2 is desired lies in the curved portion 5 of the package.

6 betegner en manchet..6 denotes a cuff ..

Den viste emballage med en hermetisk sluttende, ikke vist yderpose strålesteriliseres med β-stråler, f.eks. til optagelse af 3,5 megarad, og det steriliserede kateter har en permanent formfiksering i området for krumningen eller bugten 2.The shown packaging with a hermetically sealed, not shown outer bag is sterilized with β-rays, e.g. for recording 3.5 megarads, and the sterilized catheter has a permanent form fixation in the region of curvature or bay 2.