DE3210148A1 - CONNECTOR - Google Patents

Description

■ PATENT AGENCY OFFICE

REGISTERED REPRESENTATIVES BEFORE THE EUROPEAN ΓΑΤΠΝΤ OFFICE

PATENT LAWYERS

Fresenius AG R.-a. bold *. dm., ing.

^b W. LUDERSCHMIDT **, dr .. dipl-chem.

P.-A. WACKER *, DIPL-ING-. DIPL.-WIRTSCH.-ING.

6380 Bad Homburg 11 FR04 82

Connector

The invention relates to a connector for connecting cannulas, catheters, tubes and the like., Its tubular Body has a through hole and in which a conical connecting surface is provided, wherein a The shut-off element is arranged in the through-hole, which is axially displaceable by an in the through-hole central pipe part with axial bore is to be opened.

A connector of the type mentioned is known from DE-OS 28 17 102. This connector is as a female Connecting part formed, i.e. the through hole has a conically tapering on the inlet side Inner surface, which can interact positively with the outer cone of a male connecting part. To the Ensuring that no liquid flows out through this female connector in the disconnected state can, a shut-off device, for example a disc with a central slot, is provided transversely to the through-hole, that is only open when connected. In this respect, when loosening the connection there is no longer the risk of

that liquid, for example infusion solution, dialysis liquid or even blood, can flow out in an uncontrolled manner.

OFFICE 6370 OBERURSEI. · "OFFICE 8050 FKEISING * ZWEIGB (IRO 8.W0 PASSAU

UN [JhNSIKASSI 10 STIINEGCiSTRASSKJ-S UHHVIGSTRASSK .1

TEL. 0t>! 71 5684 · »TEL. OtIl 61/62091 TEL. 0851-36616

TELEX 4 li <e> .VS3 n-.il il TELEX 52o547 pawa d

I IT K.KAMMAI) UISsE I'AWAMUC "POSTSCHECK MdNt HLN IJbO AZ« 02 TKl-IiCCDPY: 08161/62096 (ClROUl 'Il - .uilom.it.)

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To ensure that this shut-off device is also in the coupled State is actually open, an axially displaceable central tubular part is in the through hole provided, dös also has an axial bore. This RohrteiJ is by frictional connection with the male connecting part penetrating into the female connecting part axially displaced and thereby opens the shut-off disc. When pulling back the connecting part this is central tubular part pushed back into the starting position due to the elasticity of the disc, with the disc closes automatically.

Such an arrangement, of course, only securely closes the female connector, during the passage of the male connecting part remains open in the disconnected state. In this respect, special end caps are required Or the like. Be placed on the male connector in order to complete it.

In DFj-OS 31 00 622 there is a connection device described in which the axial bore of the connecting part having the inner cone with a valve disc is blocked, which are opened by the outer cone of the other connecting part in the coupled state can. The tip of this outer cone penetrates a star-shaped slot provided in the valve disc, which closes again when the outer cone is withdrawn. This means that only the connecting part can be locked that has this valve disc, namely the female connecting part, while the male connecting part and the hose line connected to it is inevitably opened when it is disconnected. As a result, there is also the risk of excluding liquid or contamination of the Connecting parts and in particular the hose line.

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In this case, only one clamping device, for example a roller clamp, act on the outer surface of the hose and pinch it off by squeezing it. Nevertheless, the risk of contamination remains until Preserved the pinch point in the hose.

However, such contaminations are particularly common

that is, patients treated with intraperitoneal dialysis are particularly large. At this Treatment is a dialysis solution from a suitable container, for example from a plastic bag conveyed via a hose line into the patient's peritoneum. This is done in the patient a special catheter is provided which penetrates the abdominal wall and at its end facing away from the patient the has a connecting part which can interact with a complementary connecting part that is located at the end of the hose the hose line is provided. Both connecting parts have an inner or outer cone of the shape make sure that these are not caused by careless handling with your fingers or with the outer zones of the connector can be touched. For example, the male connecting part having the outer cone is with a Surrounding the outer sleeve, which protrudes beyond the outer cone in its end region, so that touching this end region of the Outer cone is no longer possible. The inner cone is also set back in the female connecting part in the axial bore so that these areas cannot be touched here either. Through this connector could the originally very high rate of peritonitis, which had a strong negative impact on CAPD treatment, was reduced, however are not completely abolished, so that peritonitis occurs again and again, which is caused by the smuggling of germs through a connecting part in the disconnected th state were generated. So far, however, it has not been possible to isolate this problem, since the end of the catheter was regularly provided with the male connecting part, which did not have a shut-off device in its flow channel.

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The invention is based on the object of a connector of the type mentioned in such a way that it automatically acts as a male connecting part when disconnecting locked, but opened in the connected state.

This object is achieved in that the central tube part has a male connecting cone and the front Sleeve part of the tubular body on its inner wall have a fastening device.

The connector according to the invention initially has the advantage on that the male connecting part in the uncoupled state in the area of the flow channel a shut-off element is closed, which is preferably formed by a valve disc. This valve disc is arranged behind the inner connecting piece, which is arranged axially displaceably within the mounting part is. This shut-off element thus closes the flow channel at a point where it cannot be reached with the fingers can be touched.

In the coupled state, the male connecting part penetrates the female connecting part, the Casing surfaces of the inner and outer cones of the respective connecting parts interact in a force-locking manner and thus result in a liquid-tight connection. These inner connectors are dimensioned so that initially the tip of the male connector opens the valve disc that is behind the inner cone of the female Connection part is arranged. When screwing in the female connection part in the male Connecting part, the axially movable and displaceable inner connecting piece is moved to the rear and thereby opens the shut-off device, which is in the direction of

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the hose is arranged behind this axially movable piece. This creates a fluid connection through the connector, with both shut-off devices being open.
5

When disconnecting, the axially movable piece is first withdrawn from the shut-off device, as the force. Closure between the inner and outer cone still continues to work and is maintained. The dissolution then takes place this frictional connection, so the withdrawal of the male cone from the female connecting part, wherein the second shut-off element is closed. As a result, the two are in the uncoupled state Connection parts located flow channels, which are present as axial bores, closed.

This mutual closure of the channels ensures that germs can penetrate through the Connector parts in the hose system is effectively prevented. Furthermore, the potentially contaminated Areas on a specific surface area of the Connector are limited, which can be easily disinfected by a disinfectant solution. Farther the shut-off of the hose system by the shut-off devices prevents the disinfectant runs into the hose system and from there into the patient's body. So it represents the double-sided Blockage in the hose system, among other things. make disinfecting easier without fear of that the disinfectant is toxic in larger doses overcomes this lock.

In addition, it is of course ensured by the barrier that no substitution fluid or blood flows out when the two connecting parts are unintentionally uncoupled, so that this effectively increases safety such a supply system is improved.

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The subclaims contain advantageous developments of the inventions.

Further details, features and advantages of the invention emerge from the following description of an embodiment with reference to the drawing.

Show it

Figure 1 is a longitudinal section through the connector associated with is coupled to a female connector

2 shows a partial representation of the ^{I * 1 ig -1 corresponding to}

male pre-binding part in the uncoupled State.

FIG. 3 shows a representation corresponding to FIG. 2 in the coupled to

stood, whereby a coupling piece has been omitted for reasons of clarity,

4 shows an enlarged cross section through a valve

Lilso'iüibü of the male connecting parts.

Fig. 5 is an enlarged cross-section through the male Connection part along lines V-V and 25

6 shows an enlarged cross section through the male connecting part along the line VI-VI.

According to FIG. 1, a connector 10 is shown which consists of a male connector 12 and a female Connecting part 14 consists. The male connecting part has a central tubular part 16 which has an axial bore 18 owns. This axial bore extends through the male connecting part 12 and ends at one clip PO, through which a hose, catheter or the like. can be pulled and attached.

In a corresponding way, the female connection

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S * ¹ S 1

part 14 also has an axial bore 22, which also extends backwards and continues to end at a second connector 24, over which a hose or the like can also be pulled.
5

This female connecting part 14 has a main pipe part 26, the front area 28 of which is stepped off. A front extension piece 30 fits complementarily into this step ₍ in such a way that a valve disk 34 is arranged in the region of the lower step 32 of the main pipe part 26 and extends transversely over the axial bore 22. This valve disk 34 extends from the extension piece 30 to the step 32 held and secured in position.

The inner surface of the extension piece 30 forms the inner cone 36 of the female connecting part 14, which is complementary to the outer cone 38 of the male connecting part 12 fits together and results in a firm frictional connection. This inner cone 36 is only in the rear area of the extension piece 30 arranged, while an annular recess 40 is provided in the front area, which is not can come into contact with the central tubular part 16. Furthermore, the outer surface has this front Area of the extension piece 30 a device for fastening, preferably a screw thread or the like., whereby, of course, spaces 44 are formed.

Furthermore, in a preferred embodiment, the main tube portion 26 has an annular shape on its outer surface

3® circumferential groove 46 into which an O-ring 48 is fitted. To the rear, an additional flange 50 extends in a ring around the outer surface of the main pipe part 26.

° tors 10 is facilitated.

The valve disc 34, which is penetrated according to FIG. 1 by the front pipe region 54 of the central pipe part 16,

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In the closed state, the I ¹ OiHi .nil and Ι; (·: »] | zL a sLernlürmiqnn Iiin ^ frhni t L 5G, which is arranged centrally. This star-shaped incision 56 opens when touched by the front one Tube area 56, the individual segments 58 resting against the outer circumference of the front tube area 54 and thus exercising a sealing function.

Another sealing function is obtained by the frictional connection between the outer cone 38 and the inner cone 36.

Regarding the embodiment of this female connector Reference is expressly made to the description in DE-OS 3100622.

The male connecting part 12 has, as explained above, a central tube part 16 on its Outer surface has an outer cone 38 which extends substantially rearwardly from the front tube region 54. This outer cone 38 and the complementary inner cone 36 are designed, for example, as a Luer cone. On the other hand, the outer cone 38 can be replaced by a cylindrical part, provided that the complementary one Adapter has a corresponding design, for example as Cup valve is formed.

A substantially cylindrical area 60 adjoins this outer cone towards the rear, which in its rear region has an annular flange 62, from which a tapered cone 64 extends rearward on extends and forms the end of the central tubular part 16. This central tubular part 16 is mounted so that it can be axially displaced as a whole within the outer sleeve 66.

This outer sleeve 66 consists essentially of a front sleeve part 68, a middle sleeve part 70 and a rear sleeve

part 72.

The inside diameter of the front sleeve part essentially corresponds to the diameter of the main tube part 26 of the female connecting part 14, so that this front

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The sleeve part can be pushed over this main pipe part 26 and in particular the O-ring 48 provided therein, this O-ring 48 being compressed and resting against the inner wall of the central sleeve part 68. Thus becomes Here, too, a tight connection or a bacterial barrier is created.

The distance a between the tip 74 of this front sleeve part 68 and the front tube region 54 of the central Pipe part 16 is designed in such a way that when the two connecting parts are pushed together or tilted at an angle 12 and 14, this pipe region 54 can only interact with the set-back inner cone 36. Furthermore, this distance a is dimensioned in such a way that accidental contact with this tubular area 54 is possible with the fingertip is excluded. In this respect, all contacts with under are omitted due to such a dimensioning Circumstances contaminated areas.

This front sleeve part 68 furthermore advantageously has a device 76 for fastening on its inner wall of the female connecting part 14, which can cooperate with the complementary device 42. This device 76 is preferably designed as a thread. This is followed by this front sleeve part 68 middle sleeve part 70 backwards with the formation of a flange 78 extending radially inward at. This flange 78 has an axial bore 80, the diameter of which is essentially the diameter of the cylindrical Area 60 of the central pipe part 16 corresponds. The pipe wall of this axial bore 80 is used here as an axial guide for this cylindrical area

The flange 78 is step-shaped on its rear side 82, which serves as a stop for the annular flange 62 discontinued and merges into a cylindrical part 84, on the inner wall 86 of the circumferential surface of the annular Flange 62 arranged immediately adjacent

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is, with this a further guidance of the central tubular part 16 is given.

The cylindrical part 84 is in turn offset with a radially outwardly extending step 88, to which the rear sleeve part 72 connects. The inside diameter of this rear sleeve part corresponds the diameter of the valve disk 90, which is arranged transversely to the direction of flow and the entire flow channel overstretched. The peripheral edge 92 of the valve disc 90 is supported on the step 88 and is by means of a fitting 94 pressed against this step 88.

This fitting piece 94 is essentially cylindrical, its outer diameter being the inner diameter of the rear sleeve part 72 and can be inserted into this sleeve part. It naturally has an axial bore 96 for flow connection. Furthermore, the connector 20, to which a hose or the like is connected, extends centrally backwards can be. The axial bore 96 widens in the direction of the valve disc 90 to form a recess 98, wherein this recess 98 is preferably widened conically or even hemispherical. The inside diameter this recess 98 at the tip of this fitting 94, i.e. H. in the immediate vicinity of Valve disk 90 preferably corresponds approximately to the diameter of the axial bore 80. This front area of the fitting piece fixes the valve disc 90 to the step 88, while the fitting piece 94 itself, for example Solvent weld on the rear sleeve part 72 firmly is arranged.

As can be seen from FIGS. 2 and 3, the tubular * "-shaped flange 62 is supported on the rear side in the uncoupled state 82 of the flange 78, while it is supported in the end region 100 of the fitting piece 94 in the coupled state. Preferably, the distance between the rear side is 82

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/ 15

] and the surface of the valve disk 90 facing the central tube part 16 are dimensioned in such a way that neither the rear side 82 nor the surface of the valve disk 90 is exerted by the central tube part 16 on pressure. The β two connecting parts 12 and 14 are brought into communication with each other as follows:

First, the male connecting part is pushed onto the female connecting part until the front pipe area 54 of the central tube part 16, the surface of the

IQ valve disc 34 touches. As a result of their elastomeric Properties this valve disc initially presses on the Pipe part 16 and moves this axially to the rear. With one more squeezing or screwing together of the connecting parts 12 and 14 are at the same time both valve disks 34 and 90 through the area 54 and the Cone 64 opened in that the star-shaped provided in both valve disks according to FIG. 4 Incision 56 is opened and the segments 58 are elastically pressed apart and to this extent, of course, one exert elastic pressure on the two end regions of the central tubular part 16. Then or at the same time when the connecting parts 12 and 14 are pushed into one another further, the frictional connection of the inner cone 36 with the outer cone 38 and at the same time the stop of the annular flange on the end region 100 or on the corresponding one area of the valve disk 90 arranged above it.

From Fig. 3 it can also be seen for what purpose the recess 98 is provided. Because she is increasing open valve 90, the folded valve segments. without these segments touching the Surface of the recess comes.

The fixation of the connecting parts 1? and 14 takes place via the Bei er; tiguri (ji; facilities 42 and 76, d '<· ■ advantageously are designed as a thread, whereby the two connecting parts 12 and 14 are screwed onto one another.

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The flange 50 serves as an end stop for the tip 74 of the front sleeve area 68, in this state a complete opening of the two valve discs as well a frictional connection between the inner and outer cone are ensured.

If the two connecting parts have to be rotated against each other by means of such a thread, it is natural the central pipe part is also rotated about its longitudinal axis, so that advantageously the central pipe part 16 and the inner region of the male connecting part 12 are configured accordingly. So are all of them affected areas within the male connecting part 12 performed circular.

When the connecting parts 12 and 14 are decoupled, one part is withdrawn from the other. As a result dor; Kraftschi ur, r> or> between the inner cone 36 and the outer cone 38 is initially the central tubular part 16 shifted axially forwards and possibly rotated radially, the cone 64 being withdrawn from the valve disc 90 which returns to its closed initial state. Likewise, he is supported Flange 62 on the back 82 of the flange 78, whereby the frictional connection between the inner cone and the Outer cone is canceled and then a retraction of the pipe region 54 takes place from the second valve disk. In the end, only the two connecting parts are left 12 and 14 separated, with both

binding parts the corresponding flow channels are closed by the valve disks. So neither can an outflow of liquid from the connecting parts nor contamination from the outside through the valve disks take place.

It should be added that the valve disc is made of an elastomer Material, for example, can consist of a rubber-like or silicone material. This shut-off device,

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which is preferably designed as a valve disk, of course, does not necessarily have to be disk-shaped exhibit. You can of course also have a cup-shaped design. This can, for example the inner cone 38 is unnecessary, since the outer cone 36 is immersed in this cup valve and not just the front area penetrate this valve, but also frictionally can place with its outer cone on the inner walls of the cup valve.

Furthermore, the preferably star-shaped slot 56 can of course be replaced by a slot of a different shape be. Viewed overall, however, the elastic material from which the shut-off elements are made should be so elastic that that they shut off the flow channel securely and a certain force must be applied to close the slots to open.

In order to avoid contamination during connection as much as possible, the two connecting parts 12 and 14 are sprayed with a liquid disinfectant. This Disinfectant, which is harmless to the patient in small quantities, is in all interior areas of the connector 10 when it is coupled. For example, a disinfection chamber between the O-ring 48 and that generated by frictional engagement Connection area between the inner and outer cones 36 and 38 is formed. This disinfection chamber, which is wetted with the disinfectant, is therefore through the between the fastening devices 42, for example bayonet lock or threaded lock, and the recess 40 and these two spaces connecting channel formed.

In order to prevent that possibly in the space 102, formed between the valve disc 90 and the flange 78, contamination occurs, it is desirable that the (unfilled. disinfectant also in

■ j reaches this space. These are advantageous Provided between the central pipe part 16 and the central sleeve part 70 flow channels 104 through which the disinfectant get into the space 102

r can.

In Fig. 2, an embodiment of a plurality of flow channels 104 is shown, which in the middle sleeve part are let in. These extend axially in the

^ Q inner wall 68 and the back 82 and along the axial bore 80. On the other hand, these flow channels 106 may, of course, as shown in Fig. 6, and of course in the central tubular part ~ \ e>, taken along the cylindrical portion 60 and the annular flange 62 superiors

] 5 be seen. Other embodiments are alike shown in FIGS. 2 and 3 and FIGS. 5 and 6.

By this embodiment it is ensured that a second disinf oriskarnmer is formed in the gap 102 ^f ier valve disc 90 so that safe contamination is controlled in this area oct i. This therefore results in a further improvement in the sterile properties of such connectors.

Such connectors are made from the usual materials, for example from polycarbonate, PTFE and the like and can conveniently be transparent. In particular, they are and can be portable over a long period of time withstand a multitude of connections without being damaged or even destroyed.

Claims (19)

■ PATENT AGENCY OFFICE REGISTERED REI'RE.SENTATIVES BEFORE THE EUROPEAN PATENT OFFICE PATENT LAWYERS R.-A. KÜHNEN *, dipl.-ing. Fresenius AG W. LUDERSCHMIDT **, dr .. dipl.-chem. P.-A. WACKER *, DIPL-INC .. PII ¹ L.-WIRTSCH.-ING. 6380 Bad Homburg 11 FR04 82 Claims Connector for connecting cannulas, catheters, tubes and the like, the tubular body of which has a through hole and in which a connection surface is provided : can be seen, with a shut-off device in the through hole is arranged, which through a central tubular part axially displaceable in the through bore with an axial bore is open, characterized in that the central tubular part (16) has a male connecting surface and the front sleeve part (68) of the tubular body (12) have a fastening device (76) on its inner wall. 2. Connector according to claim 1, characterized in that the central tubular part (16) consists essentially of a male There is a connecting cone (38) and a cylindrical area (60). 3. Connector according to claim 2, characterized in that the cylindrical region (60) at its the connector opening opposite end has an annular flange (62) which is arranged displaceably in the intermediate space (102). 4. Connector according to claim 2 or 3, characterized in that a tapered cone (64) towards the rear OFFICE 6370 OBERURSEL "OFFICE 8050 FREISING * BRANCH OFFICE 8390 PASSAU LiNDENSTRASSE 10 SCHNEGGSTRASSE 3-5 LUDWIGSTRASSE 2 TEL. 06171 S6849 TEL. 08161/62091 TEL. 0851/36616 TELEX 4 136343 real d TELEX 526547 pawa d IEl HGRAMMAPRESSK PAWAMUC - POSTSCHECK MUNICH 1360 52-802 - TPU-COPY- 081nl / 62ÖQft (GROUP II - anii.m.il 1 _ 3210H8 adjoins the annular flange (62). 5. Connector according to one of claims 1 to 4, characterized characterized in that the central tubular part (16) is slidably mounted within the outer sleeve (66), which essentially consists of a front sleeve part (68), a middle sleeve part (70) and a rear one Sleeve part (72) consists. 6. Connector according to one of claims 1 to 5, characterized in that that the front tube region (54) of the central tube part (16) by an amount (a) from the Tip (74) of the front sleeve part (68) is set back. 7. Connector according to claim 1, characterized in that the fastening device (76) as a thread in the front - ^ - Ren sleeve part (68) is formed. 8. Connector according to one of claims 1 to 7, characterized in that in the region of the front and middle Sleeve part (68, 70) a radially inwardly extending flange (78) is arranged, the one has axial bore (80). 9. Connector according to claim 8, characterized in that the diameter of the axial bore (80) is substantially corresponds to the diameter of the cylindrical region (60) of the central tubular part (16). 10. Connector according to claim 8 or 9, characterized in that the rear side (82) of the flange (78) is designed as a stop for the annular flange (62).
35 11. Connector according to one of claims 1 to 10, characterized in that the flange (78) of the middle sleeve part (70) backwards a cylinder shaped part (84), the inner wall (68) of which the peripheral surface of the annular flange (62) directly is adjacent. 12. Connector according to one of claims 1 to 11, characterized characterized in that the rear sleeve part (72) is attached to the middle sleeve part (70) via the step (88) adjoins, wherein the inner diameter of the rear sleeve part (72) is greater than that of the middle Sleeve part (70). 13. Connector according to claim 12, characterized in that that a valve disc (90) between the middle sleeve part (70) and the rear sleeve part as a shut-off device (72) is provided. 14. Connector according to claim 13, characterized in that the diameter of the valve disc (90) is the inner diameter of the rear sleeve part (72) and the valve disc (90) on the step (88) supports. 15 connector according to claim 13 or 14, characterized in that that in the rear sleeve part (72) a fitting piece (94) is inserted, which in the area of the axial Bore (96) has a recess (98) on the side facing the valve disc (90). 16. Connector according to claim 15, characterized in that the recess (98) is conical or hemispherical is formed and the cone (64) and the segments (58) of the valve disc which are bent in the open state (90) picks up. 17. Connector according to one of claims 1 to 16, characterized characterized in that the distance between the rear (82) of the flange (78) and the central Pipe part (16) facing surface of the valve disk be (90) is dimensioned so that neither on the back (82) a pressure is still exerted on the surface of the valve disc (90) from the central tubular part (16). 18. Connector according to one of claims 1 to 17, characterized characterized in that the fitting piece (94) has a circumferential ring area (100) on its front side, which presses the valve disc (90) against the step (88) and at the same time serves as a stop for the flange (62). 19. Connector according to one of claims 1 to 18, characterized in that at least one axially extending Flow channel (104, 106) along the cylindrical part (84), the flange (78), the cylindrical region (60) and / or the annular flange (62) is arranged.