Vascular closure device and method of positioning vascular closure device

1. Vascular closure device for sealing a puncture site in a vascular wall comprising a sheath having a distal end and at least one proximal end, wherein the sheath comprises a tubular body, characterized in that at least one distal balloon member is firmly arranged at the distal end of the tubular body of the sheath and at least one expandable anchor member is firmly arranged proximal to the distal balloon member on the tubular body of the sheath, wherein all fixation points of the at least one expandable anchor member and the at least one distal balloon member are provided on the outer circumferential surface of the tubular body of the sheath, wherein at least the distal side of the at least one distal balloon member is a pressure area for applying pressure on the outside of the vascular wall, wherein when the at least one distal balloon member is in an expanded state, the at least one distal balloon member at least partially extends beyond a distal end of the tubular body of the sheath, and when the at least one distal balloon member and the at least one expandable anchor member are in an expanded state, the at least one distal balloon member and the at least one expandable anchor member are at least partially in contact with each other such that the proximal side of the at least one distal balloon member rests against the distal side of the at least one expandable anchor member to increase the distal pressure which can be applied to a specific area of the vascular wall at or around the puncture site in the vascular wall and that the distal end of the vascular closure device is open, characterized in that the vascular closure device further comprises an elongated dilator movably arranged within the sheath.

2. Vascular closure device according to claim 1 , characterized in that the at least one expandable anchor member and the at least one distal balloon member are expandable at least in a radial direction of the tubular body of the sheath.

3. Vascular closure device according to claim 1 , characterized in that the at least one expandable anchor member and the at least one distal balloon member are expandable separately.

4. Vascular closure device according to claim 3 , wherein the at least one expandable anchor member and the at least one distal balloon member are expandable by separate expansion channels.

5. Vascular closure device according to claim 1 , characterized in that with the dilator being inserted into the sheath, the tip of the dilator in a terminal position extends beyond the distal end of the sheath by a predefined distance.

6. Vascular closure device according to claim 1 , characterized in that the dilator has an enlarged portion forming a rest near the proximal end of the dilator and the vascular closure device has a seat for receiving the enlarged portion of the dilator.

7. Vascular closure device according to claim 6 , characterized in that the sheath comprises a hub and in that the seat is provided in the hub.

8. Vascular closure device according to claim 1 , characterized in that in a distance to the distal end of the dilator the dilator has a step on the outside.

9. Vascular closure device according to claim 1 , characterized in that the at least one expandable anchor member is a balloon member.

10. Vascular closure device according to claim 1 , characterized in that at least the at least one distal balloon member carries haemostatic agent.