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公开(公告)号:DE602006014967D1
公开(公告)日:2010-07-29
申请号:DE602006014967
申请日:2006-02-21
Applicant: ALCON INC
Inventor: HOPKINS MARK ALAN , HUCULAK JOHN C , TODD KIRK W , THOMAS ROGER D , GAO SHAWN X , NAZARIFAR NADER
IPC: A61M1/00
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公开(公告)号:DE602007006138D1
公开(公告)日:2010-06-10
申请号:DE602007006138
申请日:2007-12-14
Applicant: ALCON INC
Inventor: GAO SHAWN X , WILLIAMS DAVID LLOYD , ROWE SCOTT T , AGAHI DARYUSH
IPC: A61F9/00 , A61F9/007 , G01F23/292 , G01N35/10
Abstract: A continuous high resolution fluid level monitoring system (300) is provided by embodiments of the present invention. This continuous high resolution fluid level monitoring system includes a unique fluid level sensor having a point light source (202), parabolic reflector (204), sensor array (308), and detection, processing and control system (310). The point light source illumines a parabolic reflector wherein the point light source is located at the focus of the parabolic reflector. The parabolic reflector reflects light from the point light source to produce a parallel light curtain (210). This parallel light curtain is parallel to an axis of symmetry of the parabolic reflector. The parallel light curtain illumines a chamber (302) such as a chamber in an ophthalmic surgical device used to contain surgical fluid (304). The sensor array coupled to the chamber detects the parallel light curtain illuminating the chamber. The sensor array provides an output to a detection/processing/control system in order to determine the fluid level within the chamber. This optical method of determining the surgical fluid levels may be advantageous in that it prevents physical contamination of the surgical fluids.
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公开(公告)号:ES2338147T3
公开(公告)日:2010-05-04
申请号:ES06720912
申请日:2006-02-21
Applicant: ALCON INC
Inventor: HOPKINS MARK ALAN , GAO SHAWN X
IPC: A61M1/00
Abstract: Aparato para controlar la aspiración en un sistema microquirúrgico (10), que comprende: una fuente de gas presurizado (12); un generador de vacío (22) acoplado fluídicamente a dicha fuente de gas presurizado (12); una cámara de aspiración (26) acoplada fluídicamente a dicha fuente de gas presurizado (12) y dicho generador de vacío (22); una válvula proporcional de vacío (16) acoplada fluídicamente entre dicha fuente de gas presurizada (12) y dicho generador de vacío (22); un transductor de presión (24) acoplado fluídicamente a dicha cámara de aspiración (26); un controlador proporcional (40); un ordenador (38) eléctricamente acoplado a dicha válvula proporcional de vacío (16), dicho transductor de presión (24) y dicho controlador proporcional (40); y caracterizado porque el aparato comprende además: una válvula proporcional de presión (20) acoplada fluídicamente entre dicha fuente de gas presurizado (12) y dicha cámara de aspiración (26); y dicho ordenador (38) está acoplado eléctricamente a dicha válvula proporcional de presión (20); en el que, tras la selección de una presión de succión deseada para dicha cámara de aspiración (26) por medio de dicho controlador proporcional (40), dicho transductor de presión (24) determina una presión de succión real en dicha cámara de aspiración y proporciona a dicho ordenador una señal correspondiente a dicha presión de succión determinada, y dicho ordenador proporciona señales a dicha válvula proporcional de vacío (16) y dicha válvula proporcional de presión (20) para mantener dicha presión de succión real próxima a dicha presión de succión deseada.
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公开(公告)号:MX2007015969A
公开(公告)日:2009-02-16
申请号:MX2007015969
申请日:2007-12-14
Applicant: ALCON INC
Inventor: GAO SHAWN X , HOPKINS MARK ALAN
Abstract: Las modalidades de la invención proporcionan un aparato y método para controlar el flujo del fluido de aspiración en una cámara de aspiración de un casete quirúrgico. Una modalidad de la presente invención proporciona una cámara de aspiración que tiene un orificio de aspiración colocado en o cerca del fondo de la cámara. Cuando el fluido de aspiración entra en la cámara de aspiración desde debajo de la superficie del fluido (por ejemplo, desde un orificio localizado en el fondo o en una pared lateral cercana al fondo), no crea disturbios en la interfaz líquido/aire y por lo tanto no altera la detección continua del nivel. También, puesto que el orificio de aspiración está colocado en o muy cerca del fondo de la cámara de aspiración, el líquido dentro de la cámara se puede usar completamente para el reflujo sostenido y el cebado por impulso.
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公开(公告)号:AU2007249089A1
公开(公告)日:2008-07-03
申请号:AU2007249089
申请日:2007-12-18
Applicant: ALCON INC
Inventor: HOPKINS MARK ALAN , GAO SHAWN X
Abstract: Embodiments of the present invention provide an apparatus for controlling the flow of aspiration fluid in an aspiration chamber (185,524,624) of a surgical cassette (150,522,600). One embodiment of the present invention provides an aspiration chamber having an aspiration port (632) positioned at or close to the bottom of the chamber. When the aspiration fluid enters the aspiration chamber from below the fluid surface (e.g., from a port located at the bottom or on a sidewall close to the bottom), it does not create disturbance at the liquid/air interface and thus does not disturb continuous level sensing. Also, since the aspiration port is placed at or very close to the bottom of the aspiration chamber, the liquid inside the chamber can be fully used for sustained reflux and push priming.
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公开(公告)号:CA2615073A1
公开(公告)日:2008-06-22
申请号:CA2615073
申请日:2007-12-17
Applicant: ALCON INC
Inventor: WILLIAMS DAVID LLOYD , GAO SHAWN X , AGAHI DARYUSH , ROWE T SCOTT
IPC: G01F23/292 , A61F9/007
Abstract: A continuous high resolution fluid level monitoring system (300) is provided by embodiments of the present invention. This continuous high resolution fluid level monitoring system includes a unique fluid level sensor having a point light source (202), parabolic reflector (204), sensor array (308), and detection, processing and control system (310). The point light source illumines a parabolic reflector wherein the point light source is located at the focus of the parabolic reflector. The parabolic reflector reflects light from the point light source to produce a parallel light curtain (210). This parallel light curtain is parallel to an axis of symmetry of the parabolic reflector. The parallel light curtain illumines a chamber (302) such as a chamber in an ophthalmic surgical device used to contain surgical fluid (304). The sensor array coupled to the chamber detects the parallel light curtain illuminating the chamber. The sensor array provides an output to a detection/processing/control system in order to determine the fluid level within the chamber. This optical method of determining the surgical fluid levels may be advantageous in that it prevents physical contamination of the surgical fluids.
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公开(公告)号:CA2596710A1
公开(公告)日:2008-03-14
申请号:CA2596710
申请日:2007-08-09
Applicant: ALCON INC
Inventor: GAO SHAWN X
Abstract: A dual pump aspiration system having both a vacuum level control loop and a flow rate control loop. The system can be operated either as a vacuum priori ty system or a flow rate priority system.
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公开(公告)号:AU2007207878A1
公开(公告)日:2008-03-13
申请号:AU2007207878
申请日:2007-08-16
Applicant: ALCON INC
Inventor: NAZARIFAR NADER , GAO SHAWN X
IPC: A61B8/06
Abstract: A surgical cassette (10) is provided having a rigid fluid channel (34) formed into a rigid plastic component or housing (14). The piezoelectric crystals of an ultrasonic flow meter (120) are positioned on one side of the fluid channel. The side wall (35) 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 (39). The interface (41) between the wall and the air acts as an acoustic reflector for the operation of the ultrasonic flow meter.
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公开(公告)号:CA2592212A1
公开(公告)日:2007-12-28
申请号:CA2592212
申请日:2007-06-18
Applicant: ALCON INC
Inventor: GAO SHAWN X
IPC: A61F9/007 , A61B17/00 , G01F23/292 , G01N21/41
Abstract: Embodiments of the present invention provide a system and method for detecti ng the level of a fluid in a surgical cassette by projecting light from a linear light source into a wall of a cassette. Depending on the amount a light reflected or refracted in the cassette (i.e., due to the cassette material/fluid interface or cassette material/air interface (or oth er interface)) various portions of a linear sensor array will be more or less illuminated. By examining the illumination of the linear sensor array, the level of fluid in the chamber can be determined.
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公开(公告)号:AU2007261238A1
公开(公告)日:2007-12-27
申请号:AU2007261238
申请日:2007-05-21
Applicant: ALCON INC
Inventor: GAO SHAWN X , HOPKINS MARK A
IPC: A61M16/06
Abstract: A microsurgical system capable of improving reflux via programmable, pre-defined reflux profiles and a pressure accumulator.
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