Patent ID: 8870917

Claim:
A deployment instrument for deploying a closure device for sealing a percutaneous puncture in a wall of a body passageway, the closure device including an anchor, a plug and a contiguous elongate filament configured to draw the plug towards the anchor upon the application of tension to the filament in a direction away from the anchor, the deployment instrument comprising: a carrier assembly, wherein the carrier assembly is configured to hold the closure device in a pre-deployment state; a tensioner assembly, comprising: a spring configured to control the tension in the filament; and a tension indicator configured to indicate to a user when the tension in the filament has reached a threshold while the closure device is in a deployed state; wherein the deployment instrument is configured to, during the deployed state, increase the tension in the filament as the deployment instrument is moved between a first linear distance and a second linear distance greater than the first linear distance away from the wall of the body passageway.