Partial venting system for occlusion surge mitigation
First Claim
1. A surgical system 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 first pressure sensor disposed and configured to detect a pressure associated with the surgical site;
a second pressure sensor located along the aspiration conduit, the second pressure sensor configured to monitor an aspiration pressure within the aspiration conduit; and
a controller having a first pressure threshold and a second pressure threshold stored therein and being in communication with the vacuum relief valve, the first pressure sensor, and the second pressure sensor, the controller being configured to control the vacuum relief valve to partially open the vacuum relief valve to decrease the vacuum pressure in the aspiration conduit so that the vacuum pressure in the aspiration conduit decreases towards atmospheric pressure without reaching atmospheric pressure when the pressure detected by the first pressure sensor is less than the first pressure threshold, and the controller being configured to control the vacuum relief valve to close the vacuum relief valve when the pressure detected by the second pressure sensor is greater than the second pressure threshold, wherein an amount that the vacuum relief valve is partially opened is correlated to a difference between the first pressure threshold and the pressure detected by the second pressure sensor.
3 Assignments
0 Petitions
Accused Products
Abstract
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.
-
Citations
17 Claims
-
1. A surgical system 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 first pressure sensor disposed and configured to detect a pressure associated with the surgical site; a second pressure sensor located along the aspiration conduit, the second pressure sensor configured to monitor an aspiration pressure within the aspiration conduit; and a controller having a first pressure threshold and a second pressure threshold stored therein and being in communication with the vacuum relief valve, the first pressure sensor, and the second pressure sensor, the controller being configured to control the vacuum relief valve to partially open the vacuum relief valve to decrease the vacuum pressure in the aspiration conduit so that the vacuum pressure in the aspiration conduit decreases towards atmospheric pressure without reaching atmospheric pressure when the pressure detected by the first pressure sensor is less than the first pressure threshold, and the controller being configured to control the vacuum relief valve to close the vacuum relief valve when the pressure detected by the second pressure sensor is greater than the second pressure threshold, wherein an amount that the vacuum relief valve is partially opened is correlated to a difference between the first pressure threshold and the pressure detected by the second pressure sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of operating an aspiration system, comprising:
-
directing a fluid through an aspiration conduit in fluid communication with a phacoemulsification hand piece; creating a vacuum pressure within the aspiration conduit using a pump interfacing with the aspiration conduit, to draw an aspiration fluid from a surgical site and into the aspiration conduit; detecting with a first pressure sensor a pressure associated with the surgical site; detecting an aspiration pressure with a second pressure sensor located along the aspiration conduit; decreasing the vacuum pressure in the aspiration conduit, using the vacuum relief valve, if the aspiration conduit pressure is greater than the second pressure threshold; and controlling a vacuum relief valve such that the vacuum relief valve is partially opened to vent the vacuum pressure when the pressure associated with the surgical site is less than a first pressure threshold, and controlling the vacuum relief valve such that the vacuum relief valve is closed when the aspiration pressure is greater than a second pressure threshold, wherein an amount that the vacuum relief valve is partially opened is correlated to a difference between the first pressure threshold and the aspiration pressure. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
Specification