Method for manufacturing a medical device

Abstract

A process for producing medical instruments (7) comprising the operations of extruding plastic material in order to obtain a heated tubular element (1) made of molten state plastic material, performing on the tubular element (1) a blow moulding in order to obtain a plurality of medical containers (6). The process comprises the operation of calibrating the inner surface (6a) of the various medical containers (6), performed after the operation of extruding plastic material, in order to make smooth and continuous the inner surface (6a) of each of the medical containers (6).

Description

technical field [0001] The invention relates to a method for the manufacture of a medical instrument to contain a medical fluid to be injected or an organic fluid to be sampled from a living organism. [0002] The invention described here also relates to a medical instrument, such as a syringe for injection, obtained by the aforementioned method. Background technique [0003] It should be understood that medical and pharmaceutical instruments of modern design (e.g. containers, bottles, vials, hollow cylindrical bodies for pistons to slide in syringes, etc.) are mostly made of plastic materials by advanced injection molding methods as well as by extrusion and Manufactured by blow molding. [0004] Both of the aforementioned fabrication techniques each have specific advantages and features, which manufacturers therefore choose based on their construction. [0005] The present invention relates in particular to the second technique, extrusion and blow molding, which are widel...

AI Technical Summary

Problems solved by technology

[0015] Such a technical result presents no particular disadvantages if the medical container is to be used simply to contain a liquid on the one hand, and on the other hand the container itself will receive a movable insert (such as a syringe plunger for pushing and / or In case of inhalation of liquids, organic substances, etc.) will constitute a rather serious and troublesome restriction

[0016] In practice, the irregularities present on the inner side wall surfaces of various medical containers will cause insertion problems of the movable insert, but mainly restrict the movable insert and the corresponding medical container (the movable insert will be precisely inserted into the medical container and slides in the medical container) between the seal

[0017] For example, if a medical instrument equipped with a container is represented as a syringe, the connection between the plunger and the inner surface of the container will be imprecise and suboptimal at the aforementioned manufacturing flaws of the container

[0018] It can thus be seen that even the smallest amount of air or any liquid contained in a medical container flows between two areas physically separated by a piston, creating obvious and well-known disadvantages

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