WO1996012514A1

WO1996012514A1 - Syringe

Info

Publication number: WO1996012514A1
Application number: PCT/DE1994/001239
Authority: WO
Inventors: Kurt Groeben
Original assignee: Kurt Groeben
Priority date: 1993-07-28
Filing date: 1994-10-21
Publication date: 1996-05-02

Abstract

A syringe for use in injection and taking samples is disclosed, in particular, a disposable syringe. It comprises a syringe unit (2) and a hollow needle element (1) which can be joined detachably to the syringe unit, the hollow needle element itself comprising a hub (4) which can be fitted onto the syringe unit (2) and a hollow needle (3) extending out from the hub. Protective collars (9, 10, 11, 12) which at least partially surround the hub (4) are provided at the end region of the hub (4) nearer to the hollow needle (3) and at the end region nearer to the syringe unit (2). Both protective collars (9, 10, 11, 12) are arranged at a distance from each other such that the hub (4) can be grasped with the fingers between the protective collars (9, 10, 11, 12).

Description

syringe

The present invention relates to a syringe for injecting and puncturing, in particular a disposable syringe with a syringe part and a cannula part detachably connectable therewith, which has an attachment that can be plugged onto the syringe part and a cannula starting from the attachment.

Disposable syringes are used today for injecting and puncturing joints and hollow organs. They consist of a cannula part and a syringe part, onto which the cannula part can be attached. Both parts are stored separately from each other before use. For use, the cannula part provided with a protective cover is placed on the syringe part and the protective cover is removed. A corresponding amount of the liquid to be injected is drawn into the syringe for injecting. When puncturing, the puncture is made approximately perpendicular to the surface of the skin and the appropriate body fluid is removed. In many cases it is necessary to detach the syringe part from the cannula part after filling the syringe barrel, the cannula part remaining on the body, and then to reconnect the syringe part or syringes to the cannula part in order to be able to continue to aspirate liquid. To the To release the syringe part from the cannula part, the doctor must grip the cannula part with the fingers of one hand at the base and pull the syringe part from the cannula part with the fingers of the other hand. During this activity, there is a risk that the doctor's fingers will come into contact both with the injection site and the cannula itself and with the connecting section of the syringe part, so that there is a risk of germs being transmitted into the patient's body. Although the doctor is instructed to wear gloves when performing such activities, it has been shown in practice that this instruction is often not followed. In addition, wearing gloves is cumbersome and the mobility of the hands is hindered.

A corresponding problem arises when injecting. Here too, when changing the syringe part, there is a risk of transmission of germs to the cannula, puncture site and the connecting section of the syringe part.

Another danger is that when the connector is disconnected from the syringe part and the syringe engages the attachment from which the cannula originates and when the attachment is pulled off the syringe, the doctor slips with his fingers and injures himself on the cannula.

In this way, germs can in turn get from the cannula into the physician's body, which must also be prevented, in particular because of HIV-infected people.

The invention is based on the object of creating a syringe of the type mentioned at the outset which enables particularly safe handling when injecting or puncturing and deconnecting. This object is achieved according to the invention in a syringe of the type specified in that the attachment in its end area facing the cannula and in its end area facing the syringe each have a protective sleeve at least partially surrounding the attachment, which are arranged at such a distance from one another. that the approach between the protective cuffs can be gripped with the fingers.

The invention thus further develops the approach of the cannula part so that the fingers of the doctor taking the approach cannot in contact with the cannula and the puncture site on the one hand and the connecting section of the syringe part on the other hand when injecting, puncturing and / or disconnecting. In this case, the cuff on the end region of the attachment facing the cannula provides protection against touching the puncture site and the cannula, while the cuff arranged on the end region of the attachment facing the syringe protects against touching the syringe part, in particular the corresponding connecting section it forms. The two protective sleeves are arranged at such a distance from one another that the attachment of the cannula part can be gripped comfortably with the fingers or held for injecting, puncturing and / or disconnecting. In particular, the fingers of the doctor holding the neck no longer come into contact with the puncture site or the cannula during deconnection. When a new syringe part is inserted into the attachment, the protective sleeve arranged at the associated end region of the attachment prevents the portion of the syringe part to be inserted into the attachment from contacting the doctor's fingers if the insertion is inaccurate. Moreover, there is disconnection of the cannula part from the syringe part by Ge need not fear that the finger of the doctor set the arrival abr ¹ tschen kön- because they are given a lateral hold by the protective cuffs.

The protective sleeves preferably have a radial extension corresponding at least to the thickness of a finger from the base. This ensures extensive protection against accidental contact in the radial direction.

One embodiment of the invention is characterized in that the protective sleeves are formed by ring disks. In this way, a complete closure of the grip area of the extension is achieved in the axial direction both in the direction of the cannula and in the direction of the syringe part. The cannula and the puncture site are optimally shielded against finger contact. The same applies to the corresponding connecting section of the syringe part.

Another embodiment of the invention is characterized in that the protective sleeves are formed by individual radial fingers. With this solution, there is free space between the individual fingers. However, the risk of contact of the fingers with the areas to be protected through these free spaces is low, especially if the free spaces are designed to be narrow. This solution can therefore prove to be sufficient for many applications and has the advantage of saving material.

It goes without saying that one cuff can also be annular and the other cuff can be finger-shaped.

In a further development of the invention, the protective sleeves extend over an acute angle to the axis of the attachment. In particular, the Protective sleeve arranged in the radial direction, facing the end region, starting from the attachment to the cannula, while the protective sleeve arranged on the end area facing the syringe part extends in the radial direction, starting from the attachment to the syringe attachment. In this preferred solution, both protective sleeves are therefore inclined in opposite directions. This solution has the advantage that the protective cuff arranged on the end area facing the syringe part serves as a guide for seating the syringe part, because the conical portion formed by the cuff guides the connecting section of the syringe part into the central attachment opening. The conical shape of the protective sleeve at the end area facing the cannula ensures that the attachment and the protective sleeve itself do not come into contact with the puncture site. This further reduces the risk of contamination.

In order to enable the arrangement of a protective sheath on the cannula and the attachment of the protective sheath to the attachment in the solution according to the invention, a section for attaching a cannula protective sheath is provided between the end of the cannula and the associated protective sleeve. This embodiment is particularly advantageous in combination with a conical protective sleeve, since the section for attaching the cannula protective sleeve is surrounded by the conical protective sleeve, which has a corresponding shielding effect and can be supported on the patient's skin.

The protective sleeves are advantageously designed to be resilient in order to enable elastic support.

The same plastic from which the attachment is made can be used as the material for the protective sleeves. On- Set and protective sleeves are expediently designed as a one-piece plastic molding or injection molded part.

In a further embodiment of the syringe designed according to the invention, the attachment is in two the protective sleeves

Interrupted handle sections that are connected to each other via a cannula line. This embodiment is used when the cannula part and syringe part should or must be arranged at different points. The one-piece and continuous projection in the other embodiments is divided into two sections serving as grip sections, which are connected to one another via a cannula line, for example a hose. Each grip section is provided with a corresponding sleeve, wherein both the grip section facing the cannula and the grip section facing the syringe part can be gripped with the fingers in order to be able to handle the cannula part and syringe part in the manner described above. Here, too, the sleeve provided on the handle section facing the syringe part serves as protection when disconnecting or connecting, while the protective sleeve facing the cannula protects the injection site accordingly.

If desired and not necessary, a handle section can be omitted.

The invention is explained in detail below using exemplary embodiments in conjunction with the drawing. Show it: Figure 1 is a side view of a conventional disposable syringe in the assembled state;

Figure 2 is a side view of a syringe designed according to the invention in the assembled state, the two

Protective sleeves are shown in the cut state;

Figure 3 is a perspective view of the front of the syringe of Figure 2;

FIG. 4 shows a side view of the front part of a further embodiment of a syringe designed according to the invention; and

Figure 5 is a side view of another embodiment of a cannula part.

The conventionally designed disposable syringe shown in the side view in FIG. 1 comprises a cannula part 1 and a syringe part 2, which are shown in the assembled state. The cannula part consists of a slightly conical shape made of a suitable plastic attachment 4, which has a front section 8 with a reduced diameter. Reinforcing ribs 13 extend from this section 8 in the lateral direction. A metal cannula 3 is formed in the front section 8 is hollow in its rear portion. As FIG. 1 shows, the connecting section 5 of a syringe part 2 is inserted into the recess in section 4. This connection section 5, like the recess in the projection 4, is slightly conical, so that a secure plug connection is possible. The syringe part widens from the connecting section 5 to a cylinder section 6, in which a piston is slidably guided and can be operated manually via a piston rod 7.

The disposable syringe embodied according to the invention shown in FIG. 2 is identical to the syringe of FIG. 1 except for the design of the attachment 4. Therefore, only the features that differ from the embodiment of FIG. 1 are described here.

The extension 4 of the cannula part 1 is so long in the syringe designed according to the invention that it can hold the thumb or a finger of a hand for gripping the extension. The approach is delimited at both ends by a protective sleeve 9, 10, which in this embodiment is designed as conical ring disks, as shown in particular in FIG. 3. At the front end of the approach, i.e. In front of the front protective sleeve 9 there is a flange section 8 with a reduced diameter compared to the shoulder 4, which serves to attach a protective cover for the cannula 3.

FIG. 3 shows the front part of the syringe of FIG. 2 in a perspective view.

FIG. 4 shows a further embodiment of a syringe designed according to the invention, in which the two protective sleeves 11, 12 have a plurality of obliquely arranged fingers. like to have. The tips of the fingers of the protective sleeve 11 can come into contact with the skin during puncturing and can be supported thereon.

The syringe designed according to the invention is used in the following way:

The cannula part 1 and the syringe part 2 are put together by introducing the connecting section 5 into the corresponding bore in the attachment 4. The syringe is then inserted into the corresponding hollow organ for puncturing. After the appropriate body fluid has been suctioned off, the syringe part 2 is detached from the cannula part 4 by pulling the connecting section 5 out of the corresponding bore of the attachment 4. In this case, the attachment 4 is held between the thumb and index finger, the two protective sleeves 9 and 10 preventing the fingers from coming into contact with the cannula or puncture site and the connecting section 5 of the syringe part.

After emptying, the syringe part 2 is connected again to the cannula part 4 by inserting the connecting section into the recess of the attachment 4. Here, the conical protective sleeve 10 serves as a guide and prevents the tip of the connecting section 5 from coming into contact with the fingers holding the cannula part 4, which is still on the patient's skin. After inserting the syringe part, liquid can be sucked off again. Finally, the entire syringe is removed from the body. When separating the _Sc protective sleeve 9 that the thumb or finger slip off the attachment 4 and come into contact with the cannula 1.

_T he usführungsform _A of Figure 4 is gehandhab in a corresponding manner.

The Schutziπanschetten or a protective sleeve can be coated further ^¬ a side or both sides with a bacteriocidal Materi al.

Figure 5 shows a further embodiment of a cannula part. This embodiment differs from the embodiments of FIGS. 2 to 4 in that the attachment 4 is divided into two attachment or handle sections 4a, 4b, which are connected to one another via a suitable cannula line 14, shown here as a tube. When using this cannula part for puncturing or injecting, the actual syringe part can thus be arranged separately from the cannula part, the grip section 4a with the cuff 9, the

Flange section 8 and the metal cannula 3 on the injection or

Puncture site remains and the liquid to be injected over the

Hose 14 enters the metal cannula or the liquid removed is guided via hose 14 to the syringe part. Rear

Handle section 4b of the approach is required for handling when connecting or disconnecting. Thus, this embodiment also ensures the advantages of safe handling listed above

Inject or puncture and when connecting or disconnecting.

Claims

claims

1. Syringe for injecting and puncturing, in particular a single-use syringe, with a syringe part and a cannula part which can be detachably connected to it and which has an attachment which can be plugged onto the syringe part and a cannula starting from the attachment, characterized in that the attachment (4) in its the cannula ( 3) facing end region and in its end region facing the syringe each have a protective sleeve (9, 10; 11, 12) at least partially surrounding the attachment (4), which are arranged at such a distance from one another that the attachment ( 4) between the protective sleeves (9, 10; 11, 12) can be gripped with the fingers.

2. Syringe according to claim 1, characterized in that the protective sleeves (9, 10; 11, 12) from the attachment (4) have a radial extent corresponding to at least the thickness of a finger.

3. Syringe according to claim 1 or 2, characterized in that the protective sleeves (11, 12) are formed by individual ra¬ dial fingers.

Syringe according to claim 1 or 2, characterized in that the protective sleeves (9, 10) are formed by ring disks.

Syringe according to one of the preceding claims, characterized in that the protective sleeves (9, 10; 11, 12) extend at an acute angle to the axis of the attachment (4).

Syringe according to claim 5, characterized in that the protective sleeve (9, 11) arranged on the end region facing the cannula (3) extends in the radial direction from the attachment (4) to the cannula (3).

7. Syringe according to claim 5, characterized in that the protective sleeve (10, 12) arranged on the end region facing the syringe part extends in the radial direction from the attachment (4) to the syringe part (2).

8. Syringe according to claim 7, characterized in that the on the syringe part (2) facing end region an¬ arranged protective sleeve (10, 12) is designed as a guide for inserting the syringe part (2).

9. Syringe according to one of the preceding claims, characterized in that between the cannula end and the associated protective sleeve (9, 11) a section (8) is provided for attaching a cannula protective cover.

10. Syringe according to one of the preceding claims, characterized in that the protective sleeves (9, 10; 11, 12) are resilient.

11. Syringe according to one of the preceding claims, characterized in that the approach is interrupted in two the protective sleeves (9, 10) having handle sections (4a, 4b) which are connected to one another via a cannula line (14).

12. Cannula part for a syringe according to one of the preceding claims.