Abstract: A volume homeostatic fluid--fluid exchanger for facilitating clearance of postvintrectomy vitreous hemorrhage includes an infusion cylinder device, an aspiration cylinder device, and a connecting tube which interconnects one cylinder of each of the two cylinder devices to form a close hydraulic system and establish a synchronized action between the two cylinder devices. When a first plunger device of one of the two cylinder devices acts, a second plunger device of the other cylinder device simultaneously moves to an opposite direction of equal displacement due to a synchronized hydraulic action. When one pushes the plunger device of the infusion cylinder device, a liquid medicine is infused into the vitreous cavity via a first needle, and equal amount of bloody fluid is aspirated from the vitreous cavity by the aspiration cylinder device via a second needle.

Abstract: A volume homeostatic fluid-fluid exchanger for facilitating clearance of postvintrectomy vitreous hemorrhage includes an infusion cylinder device, an aspiration cylinder device, and a connecting tube which interconnects one cylinder of each of the two cylinder devices to form a close hydraulic system and establish a synchronized action between the two cylinder devices. When a first plunger device of one of the two cylinder devices acts, a second plunger device of the other cylinder device simultaneously moves to an opposite direction of equal displacement due to a synchronized hydraulic action. When one pushes the plunger device of the infusion cylinder device, a liquid medicine is infused into the vitreous cavity via a first needle, and equal amount of bloody fluid is aspirated from the vitreous cavity by the aspiration cylinder device via a second needle.