公开(公告)号：US12070417B2

公开(公告)日：2024-08-27

申请号：US16858925

申请日：2020-04-27

Applicant: Alcon Inc.

Inventor： Shawn X. Gao ,  Ivan Milutinovic ,  Roderick S. Van ,  Vincent A Baxter ,  Raphael Gordon

IPC: A61F9/007 ,  A61M1/00

CPC classification number: A61F9/00745 ,  A61F9/007 ,  A61M1/73 ,  A61M1/77 ,  A61M2205/3317 ,  A61M2205/3337 ,  A61M2205/702

Abstract: Systems and methods are disclosed for measuring fluid pressure in an ophthalmic surgical system. An example system comprises a fluid flow path and a pressure sensor system for measuring pressure in the fluid flow path. The pressure sensor system comprises a conductive, movable diaphragm having a first side and a second side, the first side of the diaphragm facing the fluid flow path, and an eddy current position sensor positioned on the second side of the diaphragm without contacting the diaphragm. The eddy current position sensor comprises a position sensor coil activatable by high frequency alternating current and signal conditioning electronics capable of sensing inductance or impedance or resonant frequency variation in the position sensor coil as a gap between the diaphragm and the position sensor coil changes and of translating that variation into a displacement signal correlated to fluid pressure. A method of measuring fluid pressure may be performed using one or more of the systems described herein.

公开(公告)号：US11878105B2

公开(公告)日：2024-01-23

申请号：US17393437

申请日：2021-08-04

Applicant: Alcon Inc.

Inventor： Vincent A Baxter ,  David Dyk ,  Satish Yalamanchili ,  Raphael Gordon

IPC: A61M1/00 ,  A61F9/007

CPC classification number: A61M1/774 ,  A61F9/00745 ,  A61M2205/3331 ,  A61M2210/0612

Abstract: According to certain embodiments, a surgical cassette for an ophthalmic surgical system comprises an irrigation conduit that is in fluid communication with a handpiece and carries fluid toward a surgical site. An aspiration conduit is in fluid communication with the handpiece and carries fluid away from the surgical site. An aspiration pump creates a vacuum pressure in the aspiration conduit to draw fluid through the aspiration conduit towards a drain reservoir. A reservoir couples with a pressure-vacuum source to manage the reservoir pressure. A valve is in fluid communication with the aspiration conduit and the reservoir, and provides one or more channels between the aspiration conduit and the reservoir. Each sensor detects a pressure associated with the surgical site. A computer controls the valve in response to the pressure detected by the one or more pressure sensors to mitigate a pressure or volume change.