Closure device with rapidly eroding anchor

A closure device for sealing an intravascular puncture site located in a wall in a blood vessel, the blood vessel defining a body lumen having a blood stream, the closure device comprising:

• a closure element made of biocompatible, hemostatic material;
• an anchor;
• and
• a tether extending through the anchor and the closure element,
• wherein the anchor comprises a body being configured to move from a pre-deployed state to a deployed state, wherein in the pre-deployed state the body has a first width aspect relative to a direction of deployment, and a second width aspect in the deployed state relative to the direction of deployment, the second width aspect being greater than the first width aspect,
• wherein the body is formed from a rapidly eroding material configured to erode through dissolution within a body lumen, the rapidly eroding material being a solid solution based on a sugar alcohol solvent and a solute,
• wherein the anchor initially has sufficient structural integrity to deploy through the puncture site and function as an anchor during placement of the closure element, and
• wherein the anchor erodes or dissolves more rapidly than the closure element so that, once the anchor is placed in the body lumen, it rapidly erodes or dissolves in the blood stream and leaves behind the closure element.