The invention generally relates to treatment of fistulas and abscesses and specifically to an all-in-one treatment device. The invention provides an aspiration catheter with imaging capabilities that can also deploy a blocking device, thereby providing an all-in-one treatment device for treating a fistula or an abscess. The device is inserted into an abscess and its imaging capabilities can be used to guide the device to a treatment site. A clogging device can be deployed from the device to prevent draining into, or out of, the abscess. In certain aspects, the invention provides a device for aspirating an abscess or fistula that includes a catheter having an extended body with a lumen therein, an imaging device such as an ultrasonic transducer disposed at a distal portion of the catheter, and a clogging device deployable from the catheter.
