DE8510201U1 - Catheter set - Google Patents

Description

DIPL..PHYS, DR. WALTHER JUNlVS 3 Hanover

WOLFSTR.ASSE J4 <TELEPHONE (05 U) 13 45 30

March 26, 1985

Dr. Y / Y

My file: 880

Dr. Doron Mehler, Warburghof 18, 3000 Hannover 61

Catheter set

The invention relates to a catheter set, consisting of |

from a syringe, one on this by means of a |

The stylet to be attached, one over \

the stylet-drawn plastic cannula with cannula->

holder and one through the plastic cannula,

catheter. · ^Γ

Such a catheter set is from DE-GM 82 22 222.3 |

known. This catheter set is used for continuous |

Renal plexus anesthesia applied. Through a |

special training of the tip of the stylet are s

relatively high forces necessary to perform the Pascie ^

ire. The perforation can therefore be clearly felt j

and a "click" phenomenon is often evident here |

noticeable. This makes it easier for the anesthetist to |

Task. But this also leads to the avoidance of |

Nerve or vascular lesions. I.

With this catheter set, however, the use of a |

Ueurostimulator not possible. A neurostimulator |

can be used with catheter sets in which |

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first a stylet without a plastic cannula is inserted into the nerve vessel compartment so that $ the bare metal of the stylet is exposed for connection to a clip of the neurostimulator. This execution However, the catheter set has the disadvantage that after inserting the stylet, the plastic cannula must be pushed over the protruding free end of the stylet until the front end of the Plastic cannula also comes to rest in the nerve vessel box. That is a relatively lengthy g

Activity that or- | calls. The time necessary for this work |

is often not available in the operating room. The neurostimulator is otherwise also connected to a device connected, which has a stylet, which is covered with plastic cannula-like until just before the tip and has two flexible connectors, one for connecting the neurostimulator and the other for the Attaching a syringe.

It is the object of the invention to provide the catheter set mentioned at the beginning, which is extremely fast and can be easily introduced, so that the connection of a neurostimulator is possible.

The invention consists in placing an electrically conductive piece of material between that of the tip remote side of the stylet and the outer surface of the stylet holder or the cannula holder.

The arrangement of such an electrically conductive piece of material makes it possible from the outside forth to attach a clamp of the neurostimulator to the electrically conductive piece of material and thus to get an electrically conductive connection to the stylet, although the stylet through the plastic cannula and its cannula holder is completely covered with non-conductive material. - 3 -

In one embodiment, the stylet holder or the cannula holder is made of electrically conductive material Material or it is at least partially covered with such a material. The stylet holder can be made from Made of metal, but it can also consist of a conductive plastic mixture. One can Stylet holder or the cannula holder also with an electrically conductive layer by vapor deposition, galvanically or similarly provided.

Another way of carrying out the invention consists in arranging an electrically conductive one Strip on the stylet holder or on the cannula holder, which is connected to the stylet and itself extends outward. A metal strip can be used here, in particular one made of a resilient one Metal curved strip. This can also be supplied as an accessory and, if required, on the stylet holder or attached to the cannula holder.

Yet another embodiment consists of <? he Formation of a socket on the stylet holder or on the cannula holder, from the inner surface of which a conductor extends extends to the stylet and touches it. It is advantageous if the stylet holder one after has outwardly directed projection, which consists of electrically conductive material or with electrically conductive material is provided, which extends to the end of the stylet. At this Projection can then be attached to a clamp of the neurostimulator.

Another embodiment consists of one made of or made of electrically conductive material

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by means of electrically conductive material coated top section, which axially on aas end of the To attach the stylet holder or the jug holder

i and at its end has a shape which

ί with the face of the stylet holder or dea

I cannula holder is identical. This top piece

I forms an intermediate piece, which is between the syringe

f and stylet holder or between stylet holder and

Cannula holder is arranged.

The essence of the invention is below with reference to

executes shown schematically in the drawing
ψ approximately examples explained in more detail. Show it:

I; 1 shows a catheter set with a stylet holder or a needle holder made of electrically conductive material

I material or coated with electrical

I conductive material,

1 Fig. 2 a section through a stylet holder,

(the one with an electrical

is provided with a conductive strip,

3 shows a view of a spring metal strip from above, as it is used in FIG can,

4 shows another embodiment of the stylet holder with spring metal strips in section,

5 shows a catheter set with an attachment,

6 shows a section through a cannula holder with a socket and a piece of wire as an electrical one Ladder,

7 shows another embodiment.

t I I I I

In Pig. 1 are the parts of the catheter set in disassembled State shown. For the application, the individual parts become a uniform Whole, which then forms the commodity, put together in the direction of the arrows.

A mandrin 2 is attached to the syringe 1, via which the plastic cannula 3 with the cannula hub 4 is inserted. For this purpose, the approach 5 on the syringe 1 is designed in the form of a socket Pushed the stylet holder 6, in which the stylet 2, which has the shape of a thin, hollow metal needle, is attached is. The plastic cannula 3 is provided with the cannula hub or the cannula holder 4, which has a much wider diameter and has protrusions. These projections are used for fixation the cannula holder 4 on the stylet holder 6. Through the plastic cannula 3 and the cannula holder 4, after the stylet 2 has been pulled out, the catheter 7 can be pushed through, which at its front Has end openings 8, which are expediently arranged offset from one another. On the catheter A syringe hub 9 can be connected. The stylet has a tip that is ground in a special way

10 on. A handle is attached to the stylet holder 6

11 firmly attached in the form of a plate. This handle 11 can be touched with two fingers.

In the exemplary embodiment in FIG. 1, either the stylet holder 6 or the cannula holder 4 is made of metal or provided with a metal coating. The handle 11 can serve to connect a terminal of a neurostimulator here. Due to the conductive coating or the conductive material of the Mändrinhälis 6 there is a direct conductive connection

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"bond between the stylet 2 and the outside of the stylet holder 6, so that here a Terminal of the neurostimulator can be connected.

Both the stylet holder 2 and the cannula holder 4 are usually made of a non-conductive plastic. If this manufacture is to be retained, there are several ways to implement the invention:

In the embodiment of the Pig. 2 shows a cross section through the stylet holder 6. It can be seen how the mandrin 2 is fastened in this mandrin holder 6. A strip 12 made of resilient metal is attached here as an additional component, one end of which rests against the end of the stylet 2 facing away from the tip Io, which is bent several times over its length and the other end of which is guided around the handle 11. On both sides of the metal strip 12, the handle 11 has a projection 13 which gives the metal strip 12 a firm hold on the handle 11. In Pig. 3 this strip is shown in a view from above. As can be seen, this strip has an annular shape 14 at the end, the inner diameter of which is so large that the stylet 2 is tightly enclosed with the formation of a conductive transition. An inside standing in this annular tongue 15 is during the Aufsteckens of the strip 12 wänrend mounting on the end deb stylet according bent towards the top and ensures a reliable electrical contact.

Another embodiment is shown in Pig »4, here the strip 12 is made of spring steel on both Ends bent, the one bend is in the

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Area of the handle 11, the other bend is also U-shaped so that the end of the Strip 12 made of spring steel is resiliently pressed against the outer surface of the stylet. One of those Strip of spring steel can be supplied as an accessory and easily attached by hand by first sliding the U-shaped end over the handle is attached with elastic bending of the other end and then the other end in lets the cavity 16 snap into place.

In the exemplary embodiment in FIG. 5, the catheter set has either an intermediate piece 17 which can carry a handle 18 in which a socket 19 can be accommodated, or an intermediate piece 2o which can be arranged between the stylet holder 6 and the cannula holder 4, while the intermediate piece 17 is arranged between the syringe with the extension 5 and the stylet holder 6. These intermediate pieces 17, 2o consist of conductive material, for example metal or a conductive plastic mixture, or bind with a conductive surface coating. It is important that they come into conductive connection with the stylet 2 with their inner surface or their end face.

In the embodiment of FIG. 6, a cannula holder 4 is shown, on which a lateral Approach 21 is arranged, which has an axial opening 22 which serves as a socket. An easy piece Wire is inserted into this molded plastic part. Of the One end of the wire 23 protrudes into the axial recess 24 of the cannula holder 4, while the the other end protrudes from the extension 21 and there is bent outward in a U-shape. As the jack

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serving axial opening 22 is arranged at an acute angle to the axis 25 of the cannula holder, bends the wire 25 when pushed into the socket 22 and then into the axial recess 24 at the end around, so that after bending the outer end of the wire 23 to the outer surface of the extension 21 the wire has received a tight fit on the cannula holder 4. As soon as the stylet 2 is in the cannula holder 4 and the cannula 3 is inserted, there is a conductive connection between the wire 23 and the stylet 2 manufactured. As soon as a plug is plugged into the socket 22, its outer surface is in contact the wire 23 also, so that a metallically conductive connection is also made here.

In the exemplary embodiment in FIG. 7, the wire 23 is attached to a metal socket 26. The connection is done e.g. by soldering. Wire 23 and socket 26 are pushed together into recess 22. The wire 23 has a length that it protrudes into the opening 24. In the metal socket 26 is the plug of the neurostimulator is plugged in. When pulling out the metal socket is with the plug and the wire 23 is also pulled out, since the bushing is manufactured in such a way that the clamping forces act on the inner wall the cavity 22 are less than the clamping forces of the socket 26 on the plug of the neurostimulator. Through this the wire is removed from the axial opening 24 before the catheter is inserted, so that the catheter can be pushed in and out without any obstruction by the wire.

Claims (1)

llltl · · till! ·· ■ I · 1 · Expectations : 1. Catheter set, "consisting of a syringe, an on this by means of a stylet holder. fastening mandrin, an art piece pulled over the mandrin i fabric cannula with cannula holder and one through the \ Plastic cannula sliding catheter, 1 characterized by ι the arrangement of an electrically conductive material piece (12, 23) between that facing away from the tip End of the stylet (2) and the outer surface the stylet holder (6) or the needle holder (4). i \ 2. Catheter set according to claim 1, I characterized by I daC the stylet holder (6) or the cannula holder (4) t consists of electrically conductive material or with i is at least partially covered by such. [ 3 · catheter set according to claim 1, marked by the arrangement of an electrically conductive strip (12) on the stylet holder (6) or the cannula holder (4), which is connected to the stylet (2) and extends outward. 4. catheter set according to claim 1, : marked by : the formation of a socket (22) on the stylet or i cannula holder (4, 6), from the inner surface of which a : Head (23) extends to the stylet (2). Catheter set according to claim 1,
marked by an outwardly directed projection (11) on the stylet or cannula holder (4, 6), which consists of electrically conductive material or is provided with electrically conductive material, which extends to the end of the stylet (2). Catheter set according to claim 1,
marked by one made of electrically conductive material or by means of electrically conductive material coated top piece (17, 2o) which is to be slipped axially onto the end of the mandrel (2) and on its end has a shape which matches that of the end face of the stylet holder (6) or the cannula holder (4) is identical.