Volume homeostatic fluid-fluid exchanger

Details Volume homeostatic fluid-fluid exchanger Volume homeostatic fluid-fluid exchanger

1996-12-20

1998-05-26

Buiz, Michael

Surgery

Means for introducing or removing material from body for...

Material introduced into and removed from body through...

A61M 100

Patent

active

057556849

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. After changing flow directions inside the cylinder devices, one can refill the infusion cylinder device with the liquid medicine and in the same time drain the bloody fluid out of the aspiration cylinder device. Repeat the steps mentioned above, the content of the vitreous cavity can be replaced by the liquid medicine under constant intra-ocular pressure (IOP).

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