Disclosed herein are implantable fistula treatment devices and related methods. In some embodiments, an implantable fistula treatment device may comprise a suture and a proximal anchor. The proximal anchor may comprise a tissue anchor and a suture tensioner. The suture tensioner may be configured to resiliently maintain the suture in tension over a range of distances between the proximal anchor and a distal anchor. In some variations, the suture tensioner may have a deformable elastic structure. The suture tensioner may have a tensioned configuration and a neutral configuration.
