Methods and systems for posterior segment volume measurement

摘要

Systems and methods for determining a volume of the posterior segment of an eye during a fluid-to-gas exchange are described. The determined volume of the posterior segment may be used to determine the volume of pure tamponade gas to be introduced into the posterior segment resulting in a desired tamponade gas to other gas (e.g., air) ratio, such as during an ophthalmic surgical procedure. Particularly, the systems and methods may provide for improved gas utilization, less waste, and reduced surgery time, for example, by accurately measuring the volume of the posterior segment of the eye and only using the amount of pure gas required to produce the desired ratio. Further, in some implementations, mixing of a tamponade gas is accomplished intrinsically within the posterior segment of the eye, thereby avoiding manual mixing and reducing surgery time.

主权项

1. A system for determining a volume of a posterior segment of an eye, the system comprising:
a collection chamber fluidically coupled to the posterior segment of the eye, the collection chamber adapted to receive a fluid from the posterior segment of the eye; a gas source adapted to provide a supply of gas to the posterior segment of the eye; and a controller adapted to:
receive a first input to initiate the supply of gas from the gas source for introduction into the posterior segment of the eye;receive a second input to halt the supply of gas from the gas source;detect a change in fluid level of the collection chamber in response to fluid evacuated from the posterior segment; anddetermine a volume of the posterior segment of the eye using the detected change in fluid level.