Various embodiments for a blood filter are described. In particular, the filter is provided with scaffolds in the main body that are spaced at a predetermined distance away from tissues in which the filter is implanted to allow for retrievability beyond the known or recommended duration. Other features are also described and shown to allow for attainment of the extended duration andretrievability.本文說明血液過濾器之各種實施例。具體而言，該過濾器在主體中具有支架，其等支架與該過濾器所植入之組織以預定的距離分隔，以允許在超過已知或建議期限後的可收回性。本文亦說明及顯示其他可以達成延長期限及可收回性之特徵。
