Alcon, Inc.

Novartis Ag

Alcon Laboratories, Inc.

Johnson & Johnson Surgical Vision, Inc.

Alcon Universal Ltd.

Alcon Research, Ltd.

Med-logics, Inc.

Nader Nazarifar

Jack Robert Auld

John Christopher Huculak

Mark Alan Hopkins

Shawn X Gao

Frederick Reed

Dennis L Steppe

Gary P Sorensen

David Williams

Michael D Morgan

Matthew Braden Flowers

Roger D Thomas

Lauren M Hickey

John C Dunne, Jr

Cornelis J Drost

Hien Nguyen

Deep Mehta

Christopher C Jung

David Domash

Yuri M Shkarlet

Argelio Michael Olivera

Kirk Wellington Todd

Daniel J Wilson

Gregg Hughes

James Robert Dennewill

Rodney L Ross

Ziad R Ghannoum

Richard A Rossback

Justin Lin

Don A Clements

Eric N Anderfaas

Jeffrey Jikang Chun

Thomas Hessler

Richard T Marshall, Jr

Marcus Souza

Laurens J Drost

Frederick M Reed

Kirk W Todd

Chetan Nirkhe

J Laurens Drost

M Yuri Shkarlet

David M Domash

A system for a surgical system is disclosed, comprising system for distributing fluid in a surgical cassette, comprising at least one at least partially deformable bladder at least partially disposed on at least one rigid surface, wherein the bladder forms a portion of a channel, at least a first and second port in fluid communication with the channel, wherein the channel comprises at least two portions having a substantially uniform first dimension separated by a second portion have a second dimension, and wherein at least two pump head rollers are engaged with the bladder.

Systems and methods for providing a pulseless peristaltic pump

A pneumatic cross-connect proportional valve provides the capability to calibrate pressure and vacuum sensors in a surgical cassette associated with a surgical console. Calibration of non-invasive pressure and vacuum sensors in a cassette by utilizing a proportional cross-connect to pressurize the lines with set pressure or vacuum the lines with set vacuum and measure the response of respective sensors in the cassette. The use of proportional pressure may be used along with other clearing methods to clear material clogging the aspiration channel pathways and tubing of the surgical system. Utilize the cross-connect functionality to more rapidly pressurize the aspiration line upon detection or prediction of a post occlusion surge, thereby reducing the pressure difference between the surgical field, the eye chamber, and aspiration line which may prevent, for example, a surge of fluid out of the anterior chamber of the eye.

Systems and methods for proportional pressure and vacuum control in surgical system

A pressure and vacuum pump including at least two diaphragm pump heads for providing vacuum and pressure simultaneously. The dual function pump reduces number of required pumps, is traditionally quieter, and enables the system to run at a lower duty cycle. A drive in the pump housing causes a connecting rod to oscillate a diaphragm to move up and down thereby causing air to be either drawn into an inlet or forced out via an exhaust.

System level fluidics and controls

A tissue removal device includes a rigid aspiration cannula, a valve communicating with the aspiration cannula in a fluid-sealed manner, and a pneumatically-driven actuator configured for moving the valve between an open position and a closed position, wherein at the open position the valve defines an aspiration path through the aspiration cannula and the valve, and at the closed position the valve prevents vacuum from being applied at the distal tip.

Tissue removal devices, systems and methods

Irrigation solution bag

Embodiments to the present invention provide a peristaltic pump. This peristaltic pump includes a flexible flow path, an exterior casing, an elastomeric member, and a number of rollers driven by a motor. The exterior casing and elastomeric member have a first and second annular recess, respectively. An annular flow path guide is formed when the exterior casing and elastomeric member are mechanically coupled. Rollers move along the annular flow path to compress and release the flexible flow path and in so doing draw fluid through the flexible flow patch to achieve pumping action. Mechanical guides proximate to the first annular recess and second annular recess prevent relative motion between the first annular recess and second annular recess ensuring that the flexible flow path remains in place.

System and method operable to prevent tubing displacement within a peristaltic pump

An improved method of controlling intraocular pressure with a microsurgical system using measured flow rate.

Intraocular pressure control

A surgical cassette have a rigid fluid channel formed into a rigid plastic component or housing. The piezoelectric crystals of an ultrasonic flow meter are positioned on one side of the fluid channel. The side wall of the fluid channel opposite the piezoelectric crystals is exposed to fluid in the flow channel on its interior side and is exposed to ambient air on its exterior side. The interface between the wall and the air acts as an acoustic reflector for the operation of the ultrasonic flow meter.

Surgical system having a cassette with an acoustic air reflector

A surgical cassette have a rigid fluid channel formed into a rigid plastic component or housing. The housing serves as a substrate for an elastomeric acoustic coupling that can be formed on the housing outside of the fluid channel by an over molding process. Such a construction method eliminates the need for adhesives to attach the elastomeric acoustic coupling to the housing and ensures the removal of any air from between the elastomeric acoustic coupling and the housing.

Surgical system having a cassette with an acoustic coupling

A microsurgical system capable of controlling aspiration and detecting an occlusion via monitoring a change in either suction flow rate or suction impedance.

Aspiration control via flow or impedance

An elastomeric acoustic coupler formed by molding a thermoplastic or silicone rubber into a recess of a surgical cassette housing. The coupling has a raised pad to aid in the removal of all air between the transducer and the fluid conduit, and to provide an efficient transmission of an ultrasound signal into the fluid conduit.

Non-invasive flow measurement

An improved surgical cassette for controlling intraocular pressure during ophthalmic surgery.

Surgical cassette for intraocular pressure control

Embodiments of the present invention provide a system and method for determining the location of the bottom of a fluid chamber in a surgical cassette to calibrate the surgical system. According to one embodiment, the surgical cassette is shaped to allow light from a light source to pass unobstructed to a linear sensor array in an area that is a known distance from the bottom of a fluid chamber. Light rays intersected by solid cassette material, on the other hand, will insufficiently illuminate the linear sensor array. Because the slot is a known distance from the bottom of the chamber, the location of the bottom of the chamber can be determined by determining the transition between illuminated and insufficiently illuminated portions of the linear sensor array.

System and method to zero chambers in a surgical cassette

Growing community of inventors

Laguna Niguel, CA, United States of America

Nader Nazarifar