Partial Venting System for Occlusion Surge Mitigation

摘要

A surgical system comprises a hand piece, an irrigation conduit in fluid communication with the hand piece to carry fluid toward a surgical site, an aspiration conduit in fluid communication with the hand piece to carry fluid away from the surgical site, a pump interfacing with the aspiration conduit, the pump to create a vacuum pressure in the aspiration conduit to draw fluid through the aspiration conduit, a vacuum relief valve in fluid communication with the aspiration conduit to relieve the vacuum pressure in the aspiration conduit, a pressure sensor to detect a pressure associated with the surgical site, a controller in communication with the vacuum relief valve and the pressure sensor to control the vacuum relief valve to decrease the vacuum pressure in the aspiration conduit when the pressure detected by the pressure sensor is less than a first pressure threshold.

主权项

1. A surgical system for treating an ocular condition comprising:
a hand piece; an irrigation conduit in fluid communication with the hand piece and configured to carry fluid toward a surgical site; an aspiration conduit in fluid communication with the hand piece and configured to carry fluid away from the surgical site; a pump interfacing with the aspiration conduit, the pump configured to create a vacuum pressure in the aspiration conduit to draw fluid through the aspiration conduit; a vacuum relief valve in fluid communication with the aspiration conduit and configured to relieve the vacuum pressure in the aspiration conduit; a pressure sensor disposed and configured to detect a pressure associated with the surgical site; and a controller having a pressure threshold stored therein and being in communication with the vacuum relief valve and the pressure sensor, the controller being configured to control the vacuum relief valve to only partially vent the vacuum pressure to decrease the vacuum pressure in the aspiration conduit when the pressure detected by the pressure sensor is less than a first pressure threshold, and the controller being configured to control the vacuum relief valve to stop the decrease of the vacuum pressure before the vacuum pressure reaches a vacuum level lower than −50 mmHg as measured at the eye.