A kind of mini flow diverter includes the hard interior needle in a soft outer needle, the air valve of an installation soft outer needle of what and an inserting soft outer needle of what. Soft outer needle include one can elastic springing needle tubing portion, one be arranged outside what needle tubing portion and can be inflated and diameter expand expansion sacculus portion and one be connected to what sacculus portion inflation pipe portion. Needle is through in inserting what needle tubing portion in this is hard, and stretches out the piercing point outside needle tubing portion forward with one. It is designed through the soft outer needle and the hard interior needle construction, the permeable mode having an injection directly guides the soft outer needle to puncture into is intended to drain site in vivo, and the soft outer needle set is set to have splendid crystallized ability using the sacculus portion of inflation, and integrated operation step is simple and convenient, the required operating time is short, and there is broad applicability, helping what reduces the stock pressure and cost of medical institutes.一種迷你引流器，包含一軟外針、一安裝於軟外針之氣閥，及一插裝於軟外針中之硬內針。軟外針包括一可彈性撓曲變形的針管部、一套設於針管部外且可被充氣而徑擴膨脹之球囊部，及一連通於球囊部之充氣管部。該硬內針是貫穿插裝於針管部內，並具有一往前突伸出針管部外之穿刺尖部。透過該軟外針與該硬內針結構設計，可透過打針的方式將該軟外針直接導引穿刺入體內欲引流部位，並利用充氣膨脹之球囊部使該軟外針具有極佳的固定能力，且整體操作步驟簡單方便，所需操作時間短，並具有廣泛適用性，有助於降低醫療院所的備料壓力與成本。
