DE29513195U1 - Arteriovenous shunt - Google Patents

Description

Arteriovenous anastomoses are mainly used in dialysis.

Currently, the side-to-side anastomosis is mainly performed between suitable and adjacent arteries and veins of the forearm, which is then referred to as the shunt arm and requires special care and protection.

Another undesirable side effect is the constant flow noise and the sometimes extremely bloated veins.

The author's aim is therefore to create a new shunt that can be opened selectively during the dialysis phase

The invention will now be explained in more detail with reference to claims 1-7 and figures 1-3.

This shows

Figure 1 shows a schematic sectional view of a possible shunt in plan view,

Figure 2 shows a schematic cross-sectional view of the shunt

from the side view,
Figure 3 shows a schematic sectional view of a shunt variant in plan view.

Figure &idigr; shows a schematic cross-sectional view of a possible shunt (1) from above. We can see the control element {2) into whose recess (3) anastomotic processes (4,5,6,7) open. These are here anastomized (10) with the respective artery (8) or vein (9).

• · ♦

Figure 2 shows a schematic sectional view of the shunt (1) from the side.

The anastomotic processes (6,7) are visibly connected to the control element (2) in whose guide (14) the magnet (11) currently interrupts the shunt flow.

The flow is now released after its polarization via the control magnet (12).

This is achieved by the magnetic force of (12) being sufficient to overcome the adhesive force of magnet (11) on its ferromagnetic element (15). When the flow is opened, magnet (11) adheres to the ferromagnetic element (16) until the flow is closed again by the repulsion reaction of (12).

As already mentioned, magnet (11) is insulated, for example, by a titanium pot.

Figure 3 shows a schematic top view of an alternative shunt variant.

Worth mentioning are the anastomotic processes (19,20) and the control element (21), in which the magnet (22) with passage (18) is rotatably mounted and bioinertly (17) insulated.

The shunt (18) can be released or blocked using a control magnet (not shown here).

Claims (1)

EXPECTATIONS 1. Arteriovenous shunt, characterized in that the shunt (1) has a control element (2), from the recess (3) of which two anastomotic processes (4,5,6,7) for the arterial (8) and venous (9) anastomosis (10) extend, and the control element (2) is suitable for temporarily opening the shunt (I). 2. Arteriovenous shunt according to claim 1, characterized in that a tissue-inert or tissue-inert-coated magnet (11) is used as an essential element of the control element (2). 3. Arteriovenous shunt according to at least one of claims 1, 2, characterized in that the magnet (11) can be controlled by a further magnet (12) which can be placed on the skin (13) above the .. control element (2). 4. Arteriovenous shunt according to at least one of claims 1-3, characterized in that magnet (11) is suitable due to its polarization to be moved vertically in the guide (14) and remains in its respective position by a ferromagnetic element (15, 16). 5. Arteriovenous shunt according to at least one of claims 1-4, characterized, that the elements (2,7,...) coming into contact with tissue or blood preferably consist of titanium and/or silicone or at least one other bioinert material. Arteriovenous shunt,
characterized, that a control element (21) contains a biointernal or bioinertly coated (17) magnet (22) with cross connection (18), which is suitable due to its polarity to be rotated with a control magnet so that the shunt flow can be released or blocked, whereby anastomosis elements (19, 20) serve the arteriovenous anastomosis. 7. Arteriovenous shunt, characterized, that the respective construction is selected in such a way that thrombosis in combination with the choice of material is avoided.