Medico-surgical tubes and methods of manufacture

Tubes pour la micro-chirurgie et procédés de fabrication

Schläuche für die Mikrochirurgie und Vefahren für ihre Herstellung

Abstract

An epidural catheter 1 with a soft tip 2 is made by co-extruding an inner layer 11 and an outer layer 12, the inner layer being of a stiffer plastics that the outer layer. The extrusion machine 20 has two extrusion heads 21 and 22, the one 21 for the inner layer 11 having a movable cone 29 that is moved in periodically to increase the internal diameter of inner layer and then to cut off flow of extrudate entirely. This produces a region 13 having a part 14 with a thinner inner layer 11 and part 15 where the inner layer is absent. The tubing 40 is cut at the end of these regions 13 which are then closed and formed with a side opening 3 so that the patient end tip 2 is less stiff than the remainder of the catheter.

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    WO-9401160-A1January 20, 1994Arrow International Investment CorporationCatheter epidural a double durometre en une seule piece

NO-Patent Citations (0)

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Cited By (5)

    Publication numberPublication dateAssigneeTitle
    DE-20110121-U1December 05, 2002Braun Melsungen AgKatheter
    EP-2520412-A1November 07, 2012Astra Tech ABVerfahren zur Herstellung eines röhrenförmigen Objekts zur Einführung in einen Körperkanal
    EP-2965891-A1January 13, 2016Dentsply IH ABMethod for manufacturing of a tubular object for insertion into a body passageway
    US-9352504-B2May 31, 2016Dentsply International Inc.Method for manufacturing of a tubular object for insertion into a body passageway
    WO-2012150251-A1November 08, 2012Astra Tech AbMethod for manufacturing of a tubular object for insertion into a body passageway