DE7124783U - BLOOD VESSEL CONNECTION IN PARTICULAR FOR HAEMODIALYSIS TREATMENT - Google Patents

Description

Biuxgefäßschiuß, χηαυββσηάοΓό ίίίτ d ± 6 KSSO dialysis treatment

The invention relates to a blood vessel connection for continuous Blood sampling and reinfusion, especially for hemodialysis treatment with partially subcutaneous course »

A number of vovi shunt forms and their modifications have become known to date for hemodialysis treatment. The Quinton-Scribner shunt consists of a U-shaped bent plastic tube, the subcutaneous ends of the legs are bent back in the same direction by 180 °. When the shunt is attached, one end is inserted into a venous vessel, the other into an arterial one.

For fixation of the tubes inserted in the artery and vein
a silk ligature is attached directly above the vessel in the middle of the intravascular vesseltip part and the ends of the ligature are knotted with those of a corresponding ligature over the silastic tube. However, it can be

uiigsii and GsfaSwaiiiiiisltJOsen come to Kamstonieii that used to be odei / later bring about the irrevesible shunt closure. Another disadvantage of this shunt is the high flow resistance in the bends. A further development this type of shunt therefore led to the so-called "straight shunt", which, however, also has a high rate of complications is afflicted.

Another method of chronic hemodialysis treatment is there in the creation of an artificial sucutaneous arteriovenous fistula. This is a side-to-side anastonosis between the radial artery and an accessible larger vein at the level of the distal end of the radius. This method but can only be carried out with well-developed superficial veins. Furthermore, this form of shunt is unsuitable for home dialysis patients, since the connection of the patient because of the necessary puncture must be made by the doctor and because of the low pressure gradient between blood collection and Reinfusion site to create the extracorporeal blood circulation a blood pump is required.

In order to circumvent these difficulties, the superficial femoral artery was surgically relocated under the skin for the first time in order to create an extracorporeal blood circulation. Due to the high blood pressure of the superficial ■ oral artery, a blood pump is no longer necessary when reinfusing the dialyzed blood via a subcutaneous vein. Furthermore, there is practically no risk of infection. However, it is here the disadvantage that the vessels as in the subcutaneous fistula to D _u rchführung hemodialysis must be always punctured.

712478325.11.71

- sheet 3 -

The invention is therefore based on the object of providing a shunt on continual blood withdrawal of the type mentioned at the beginning to create, which is connected once with the blood vessel and in which any puncturing is omitted, so that it is especially for Home dialysis patients is suitable.

This task is solved by a lockable, on the Blood vessel placed on and with this firmly sewn pipe socket. Thereby is at the subc \ itan stored end of the pipe socket a lobe-shaped vascular prosthesis attached, which with the y-N blood vessel can be sutured. In the upper half of the pipe socket • is also a lobed support surrounding the nozzle attached, which is inserted into the subeutane fatty tissue and is mainly used for z-yr fixation of the pipe socket.

The invention has etlicae decisive advantages that it makes it superior to conventional shunt designs. The vascular prosthesis arranged at the subeutane end of the pipe socket is sutured to the blood vessel, creating a permanent connection. A support is used to fix the pipe socket approximately in the upper third of the tube, which is tissue-friendly and advantageously also the formation prevented from infection. The extracorporeal end of the tube O The connecting piece can be closed, e.g. with a screw cap or a bayonet connection, so that the patient can contact at any time the dialyzer can be connected. In particular, there is no need for puncturing, hemodialysis can be performed without any loss of blood be performed. It should also be emphasized that the pipe socket and the closure is easy to keep sterile.

The blood vessel connector according to the present invention can be surgically connected to any larger blood vessel. For this purpose, the vascular prosthesis and / or the support consists of a synthetic plastic fabric, in particular of polyester

712478325.11.71

- sheet 4 -

Tn oinor advantageous execution of the llohrsttittfons woisfc d 7! Woi clurclicohonde canal ο on, wooi a canal for taking blood, the andore is used for reinfusion. If the pipe socket e.g. on dd ο .'Vrteria femoraIis is sewn, the small distance is sufficient the canal ο of a few millimeters, xim a proper hemodialysis perform. Dor Druckgradiont between outlet and The inlet opening in the blood vessel is then still large enough that a blood pump can be dispensed with.

At the upper, oxtracorporeal end of the pipe socket, the channels Have threads and be closable by means of screw caps. It is also possible that the pipe socket means a bayonet lock is closed.

The pipe socket is preferably made of rigid plastic, especially from Poiytetraxluoräthyien. The subcutaneous Part of the nozzle must be surrounded by an elastic Silistich cover.

! To protect beneficial impurities extracorporeal ene is

I- de of the pipe socket with a rubber or plastic cap '

jjf covered.

Two examples of the invention are shown in the drawing

and then described. It shows: ι

Pig. 1 a pipe socket in section with screw caps, i Vascular prosthesis, support and rubber cap and

2 shows a pipe socket which is placed on a blood vessel and can be closed by means of a bayonet lock.

In Fig. 1, 1 is a rigid pipe socket, preferably made of rigid polytetrafluoroethylene. This pipe socket 1 is from i an elastic I.

712478325.11.71

- sheet 5 -

Surrounding Silastichülle 2, preferably on the length of the subcutaneously extending Rohrstüelcea and welded to this. in the At the subcutaneous end of the pipe socket there is a flap-shaped vascular prosthesis 3 made of plastic fabric, in particular polyester, which has been sutured tightly to the blood vessel.

On the upper third of the pipe socket, but not yet extralcorporeally, a support k is attached to the pipe socket in the shape of a disk, which is inserted into the subcutaneous fatty tissue and serves to anchor the pipe socket * This support is also preferably a plastic fabric, e.g. polyester.

Two channels 5 »6 are drilled lengthways through the pipe socket serve for taking blood and for co-infusion these channels are provided with thread 7 at the upper end and with screw caps 8, 9 locked. This ensures a tight, hygienically perfect closure of the pipe socket. Xn the channels can The stylet must be inserted between the individual dialysis treatments so that the blood does not reach the screw caps rises. For hemodialysis, the screw caps are then removed, the mandrels pulled out of the channels and the dialyser connected.

The cross section of the pipe socket can be circular or elliptical be, with the latter the two channels can have a somewhat larger distance from each other and so between the outlet and the inlet opening has a larger pressure gradient.

The extracorporeal end of the pipe socket is protected against external contamination by an upturned rubber cap.

In T ± q, 2 a pipe socket 11 is shown which is firmly connected to a blood vessel 12. This is at the intracorporeal end

7124713 in. 71

of the pipe socket 11 a vascular prosthesis 13 which surrounds it in the form of a flap and which is firmly connected to the blood vessel 12 by means of a seam 1h. Approximately in the middle of the length of the pipe socket there is again a support 15 which is embedded in the subcutaneous fatty tissue and serves to fix the pipe socket. The connecting piece also has an outlet and an inlet channel 16, 17, the channel 17 being closed with a mandrin 18.

The pipe socket is closed at its extracorporeal end by means of a cover 19. For this purpose, the cover and the end of the pipe socket have a bayonet lock 20, 21 .

- 7 - / claims

712478325.11.71

Claims (9)

claims 1. Blood vessel connection for continuous blood collection, in particular for hemodialysis treatment with partially subcutacem Course, characterized by a closable, on the blood vessel placed on and firmly connected to this pipe socket. 2. blood vessel connector according to claim 1, characterized in that that a flap-shaped vascular prosthesis is attached to the subcutaneous end of the pipe socket, which can be sutured to the blood vessel is. 3. blood vessel connector according to claim 1 and 2, characterized in that that in the upper half of the pipe socket a likewise lobe-shaped support surrounding the socket is attached. h, blood vessel closure according to claim 1, 2 or 3, characterized in that the vascular prosthesis and / or the support are synthetic plastic fabrics. 5. Blood vessel connector according to claim 1, characterized in that the pipe socket has two continuous channels. 6. Blvitgef äßanschluss according to claim 51, characterized in that that the channels have threads and can be closed by means of screw caps. 7. blood vessel connector according to claim 1, characterized in that that the pipe socket has a bayonet lock at its upper end. 712478325.11.71 S. Elut vessel connection according to Claim 1, characterized in that that the pipe socket is made of rigid plastic. 9. blood vessel closure according to claim 8, characterized in that that the subcutaneous part of the pipe socket is surrounded by an elastic Silastichülle. 712478325.11.71