DE202013100795U1 - Wing cannula with a needle protection device - Google Patents

Abstract

A winged cannula (1) with a needle protection device, wherein the winged cannula (1) has a needle (10) with needle point (100) adjoining a tube section (11) and at least one wing (13) formed on the tube section (11) and the needle protection device a passive position releasing the needle tip (100) is displaceable along the needle (10) into a protective position shielding the needle tip (100), characterized in that a base part (2) which can be fastened to the tube section (11) is provided with a guide groove (21) and the needle protection device is formed by a safety slide (3) displaceably guided in the guide groove (21), which at its end facing the needle point (100) has a protective element (34) which shields the needle tip (100) in the protective position.

Description

The invention relates to a winged cannula with a needle protection device, the winged cannula having a needle with a needle tip attached to a tube section and at least one wing formed on the tube section, and the needle protection device being displaceable from a passive position releasing the needle into a protective position shielding the needle along the needle.

Such winged cannulas are widely known. They often have a needle guard to prevent accidental puncture after use of the wing cannula with the associated risk of injury and infection.

Needle protection devices have become known from the prior art, which can be pivoted about a pivot axis about the needle, which is very complicated to do. From the DE 101 56 587 B4 a generic wing cannula with needle guard has become known, wherein the needle guard is displaceable from a passive position releasing the needle tip into a protective position shielding the needle tip along the needle. However, the known needle guard is structurally very complex and difficult to assemble, resulting in high costs and handling disadvantages.

The object of the invention is therefore to propose a winged cannula of the type mentioned, which is characterized by particularly simple handling and ideally in the sense of a low-cost production of a combination of a commercially available wing cannula with a thereto adapted easy to install needle guard, without that on Wing cannula itself changes need to be made.

To achieve the object, a wing needle with needle protection device according to the features of claim 1 protection is proposed according to the invention.

Advantageous embodiments and modifications of the invention are the subject of the dependent claims.

The invention proposes that a base part which can be fastened to the pipe section is provided with a guide groove and the needle protection device is formed by a safety slide displaceably guided in the guide groove, which has a protective element at its end facing the needle point which shields the needle tip in the protective position.

In this way, it is possible to provide conventional and known per se and used in large numbers wing cannulas with a needle guard, to which only an adapted to the present pipe section base part is needed, which serves to guide the safety slide.

For this purpose, according to a proposal of the invention, the base part may be formed on its opposite side of the guide groove with a receptacle for the pipe section.

According to a proposal of the invention, the base part can be clamped or adhered to the pipe section with this bond, wherein for the formation of an adhesive bond z. As adhesive or welded joints come into question. In any case, thus, the base part can be fixed with minimal manual effort on the pipe section.

The protective element of the guided inside the guide groove of the base part fuse slide can be formed according to a proposal of the invention of a needle at least partially enveloping pipe section, so that in the protective position, only the area of the needle tip is shielded, while the rest, but in terms of the required protective effect also safe lengths of the needle continue to be exposed.

It can also be provided that the protective section has a receiving space for the needle tip, which can be covered by means of a preferably resiliently designed snap closure as soon as the protective section is in the protective position and the needle tip is received in the receiving space. The reliability of the safety slide is thereby further increased, since in this state the safety slide is secured against displacement back into the passive position.

In order to maintain a defined protective position, the safety slide can have an end stop assigned to the protective position, so that it is only necessary to search for the protective position to advance the safety slide along the guide groove until it reaches the end stop.

The guide groove may according to another proposal of the invention have an undercut cross-section, for example, a dovetail cross-section may be provided so that the safety slide with a complementarily shaped guide portion guided only longitudinally displaceable in the guide is, however, has no further degrees of freedom and is therefore captive connected to the base part.

Furthermore, it can be provided that the safety slide can be locked in the protective position, so that after reaching the protective position this can not be repealed. This can be effected for example by resilient latching elements and the like.

Finally, a needle protection device from the safety slide and associated base part can be provided as a retrofit for use with a known wing cannula to equip the latter with a needle guard of the type mentioned in a simple manner.

Further embodiments and details of the invention will be explained in more detail with reference to an embodiment illustrative drawings. Show it:

1 a perspective view of a wing cannula according to the invention with befindlicher in passive position needle guard;

2 the wing cannula according to 1 with needle guard in protective position;

3 in an enlarged view of the base part according to the invention;

4 in a likewise enlarged view of the safety slide according to the invention;

5 an alternative embodiment of the safety slide;

6 a section through the protective element of the safety slide according to 5 ;

7 a further embodiment of a protective element according to the invention.

From the 1 and 2 is a known and commercially trained wing cannula 1 it can be seen, which has a central pipe section 11 has, at one end a hose section 12 and at the opposite end a needle 10 with needlepoint 100 is arranged above, which serves to puncture a patient. On both sides of the pipe section 11 are at diametrically opposite areas wing 13 formed in a conventional manner.

On the here cylindrically shaped pipe section 11 is one of the 3 in more detail apparent base part 2 applied, including the base part 2 at its the pipe section 11 facing bottom with a correspondingly shaped receptacle 20 is trained. Depending on the type of connection you want the recording 20 a snap or clip on the pipe section 11 make or recording 20 is with the pipe section 11 glued or welded.

At the opposite top of the pipe section 2 is a dovetail-shaped continuous guide groove here 21 formed parallel to the needle 10 is aligned. At the reception 20 facing away from the top of the base part 2 are on both sides of the guide groove 21 gradations 210 provided in the direction of the needle 10 in a graduated stop 211 end up.

According to the contour of the guide groove 21 is in more detail from the 4 apparent safety slide 3 shaped and has a complementary to the guide groove 21 trained engagement projection 31 on which is in the guide groove 21 is introduced, so that a longitudinal displacement of the safety slide 3 along the guide groove 21 and thus parallel to the needle 10 is guaranteed. At his from the installation position according to 1 apparent back, ie the needle 10 turned away end of the engagement projection runs 31 in an end stop 32 out and the rear end is also with an indicated ball 33 provided that facilitates handling in the manner described below.

At the opposite, the needle 10 facing end carries the safety slide 3 a protective element 34 in the shape of a needle 10 enveloping pipe section with a through hole 35 where the tube section is one opposite the length of the needle 10 has significantly lower linear expansion.

It is thus possible, as from a comparison of 1 and 2 evident in the guide groove 21 longitudinally guided safety slide 3 out of one 1 apparent passive position, in which the protective element 34 on the wings 13 is held in place and the needle 10 and in particular the needle point 100 releases into a protection position according to 2 to convict, especially after use of the wing cannula 1 is effected.

For this purpose, for example with a thumb, the safety slide 3 at the spherical end 33 in the direction of arrow P as of the guide groove 21 in the base part 2 pre-pushed until the end stop 32 the safety slide on the base part 2 strikes. In this defined protective position, the protective element shields 34 the needle point 100 by placing the needle point inside the through hole 35 comes to rest. In this position, it is no longer possible to accidentally use the needle 10 to sting.

By suitable, not shown here locking means of the safety slide 3 in the illustrated securing position according to 2 be locked, z. B. by a forced locking between safety slide 3 and socket part 2 , so that the protective position can not be removed accidentally.

In an alternative, from the 5 and 6 apparent embodiment of the safety slide 3 comes on the otherwise unchanged running safety slide 3 a protective element 34 used, which is the needle 10 only overlaps, but not in the area of the needle tip 100 completely enveloped.

As from the sectional view according to 6 can be seen, is within the protective element 34 a recording room 340 arranged in the protective position - as shown - befindlichem protective element 34 above the needle point 100 is positioned. It also recognizes a recording room 340 at least partially covering resiliently deformable snap closure 341 , which in the manner of a spring tongue parallel to the needle 10 in the direction of the ball 33 protrudes.

In this protection position it is possible to use the safety slide 3 and / or the needle 10 as far as to bend elastically, that the needle point 100 as indicated by arrow B in the receiving space 340 under displacement of the snap closure 341 enters and then from elastic zuschnappenden snap closure 341 in the recording room 340 is held.

In this secure state then the safety slide 3 no longer be relocated to the passive position, eliminating the needle point 100 secured permanently and reliably.

From the 7 is another embodiment of a protective element 34 can be seen, which has a recording room 340 for the needle point 100 has in the form of a ring portion which is coaxial with the needle 10 extends. Also this recording room 340 is covered by a resiliently deformable snap closure, which after entering the needle tip 100 in the recording room 340 the needle tip reliably in the receiving space 340 restrains. This is then also this protective element 34 no longer relocatable to the passive position.

An essential feature of the above-explained winged cannula is that this is commercially available and by a to the predetermined shape of the pipe section 11 adapted training of the needle guard with special base part 2 especially in the field of recording 20 and one in the base part 2 slidably guided safety slide 3 can be added in the simplest way with a highly effective and the safety requirements corresponding needle protection device. The handling is therefore comparable to the conventional wing cannula without needle protection, the assembly effort and the effort to move the needle guard from the passive position are reduced to the active position to a minimum.

It is understood that the embodiment shown in the drawings represents only an example of the invention and those skilled in the art will recognize that with differently designed winged cannulas by appropriate adaptation of the inserted base part and the safety slide with protective element even such winged cannulas such a needle guard in the simplest way can be.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10156587 B4 [0003]

Claims (9)

Wing cannula ( 1 ) with a needle protection device, wherein the wing cannula ( 1 ) one to a pipe section ( 11 ) subsequent needle ( 10 ) with needle point ( 100 ) and at least one of the pipe section ( 11 ) molded wings ( 13 ) and the needle protection device from a needle tip ( 100 ) releasing passive position into a needle point ( 100 ) shielding protective position along the needle ( 10 ) is displaceable, characterized in that a on the pipe section ( 11 ) attachable base part ( 2 ) with a guide groove ( 21 ) is provided and the needle guard of a in the guide ( 21 ) slidably guided safety slide ( 3 ) formed at its tip ( 100 ) facing end a protective element ( 34 ), which in protective position the needle tip ( 100 ) shields. Wing cannula ( 1 ) according to claim 1, characterized in that the base part ( 2 ) on its guide groove ( 21 ) opposite side with a receptacle ( 20 ) for the pipe section ( 11 ) is trained. Wing cannula ( 1 ) according to claim 1 or 2, characterized in that the base part ( 2 ) on the pipe section ( 11 ) can be clamped or adhesively bonded to this. Wing cannula ( 1 ) according to one of claims 1 to 3, characterized in that the protective element ( 34 ) of a needle ( 10 ) is formed at least partially enveloping pipe section. Wing cannula ( 1 ) according to one of claims 1 to 4, characterized in that the protective element ( 34 ) one with a snap closure ( 341 ) coverable receiving space ( 340 ) for the needle tip ( 100 ) and in the receiving space ( 340 ) received needle tip ( 100 ) the safety slide ( 3 ) against a shift into the passive position is securable. Wing cannula ( 1 ) according to one of claims 1 to 5, characterized in that the safety slide ( 3 ) one of the protective position associated end stop ( 32 ) having. Wing cannula ( 1 ) according to one of claims 1 to 6, characterized in that the guide groove ( 21 ) has an undercut cross section and the safety slide ( 3 ) a complementarily shaped guide section ( 31 ) having. Wing cannula according to one of claims 1 to 7, characterized in that the safety slide ( 3 ) can be locked in the protection position. Needle protection device from safety slide ( 3 ) and assigned base part ( 2 ) for connection to a winged cannula ( 1 ) according to the preceding claims.

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