Joints and connections – Distinct end coupler – Plural opposed sockets
Patent
1998-08-19
2000-05-09
Browne, Lynne H.
Joints and connections
Distinct end coupler
Plural opposed sockets
604264, 600585, 128912, A61M 500
Patent
active
060594845
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an introduction aid for stretching a guide wire, in particular a Seldinger wire with a flexible tip which is curved in a J shape, and securing the guide wire in a dispenser tube and to a connection element for connecting the introduction aid to the dispenser tube.
2. Description of Related Art
Used for introducing a single-lumen or multi-lumen catheter into a blood vessel is a guide wire which is brought through a puncture point to the target site and over which subsequently the catheter is advanced. This is called the Seldinger technique, which is performed using a Seldinger wire which is distinguished by a highly flexible tip which is curved in a J shape. Since guide wires may have a considerable length (0.4 to >1 m) and, apart from the highly flexible tip, have a certain elastic stiffness, the user is impeded by the end of the guide wire which projects freely out of the patient's body, and it is important to keep this end in the form of a loop. For this purpose, and for the purpose of transport, the guide wire is accommodated in a rigid dispenser tube which is converted into a coil and kept in this shape, and from which it can be released into the patient's body through an introduction kit. The dispenser tube which is converted into a coil is normally kept in place with the aid of separate clips which have longitudinal slits and are designed as double or triple clasps and in each case clamp together adjacent tube strands. The dispenser tube consists of a solid plastic, for example polypropylene, and its internal diameter is larger than the external diameter of the guide wire so that the latter slides very smoothly in the lumen of the tube. In this case, the J-shaped tip of the guide wire is stretched using an introduction aid at the junction between the end of the dispenser tube and the inlet of the catheter kit, for example a needle attachment. The introducer is provided with a pipe whose internal diameter is only slightly larger than the diameter of the guide wire so that the J-shaped tip is stretched straight. In the packaged state, the J-shaped tip of the guide wire projects beyond the front opening of the channel of the pipe so that the curvature retains its original radius and is not fatigued during the storage time due to permanent stretching in the pipe. One problem which arises is that the guide wire which slides smoothly in the dispenser tube may slip out of the dispenser during transport, which results in kinking in the packaging.
German utility model 93 19 838.8 describes an introduction aid for catheter guide wires which solves this problem. It discloses a device for securing and stretching the ends of guide wires, which comprises an elongate hollow element open at both ends, with a cylindrical section and a conical section which tapers towards the end, with a U-shaped slit extending in the longitudinal direction being present in the wall of the hollow element, so that a tongue which can be pressed into the inside of the hollow element is formed between the legs of the U-shaped slit open towards the end. A clamping fit of this device on the dispenser tube is achieved by the device being pushed onto the tube until the tongue is situated in the inside of the tube and, by means of the spring action, fixes the end of the tube in the cylindrical section of the device. The tongue, which in this way is pressed further inwards, secures the catheter guide wire against displacement in the longitudinal direction. In order to be able to introduce the J-shaped tip of the guide wire into a needle, the user must hold the dispenser tube with one hand and use the other hand to grip the introduction aid and pull it out of the end of the tube. The user must then use the hand holding the dispenser tube additionally to grip the guide wire and, with the other hand, pull the introduction aid over the J tip so that the J-shaped end is stretched in the introducer. After this, the user introduces the introduction aid with comp
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Bochna David E.
Browne Lynne H.
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