Patents by Inventor Edmund Tam
Edmund Tam has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130131448Abstract: Flow reduction hood systems are described which facilitate the visualization of tissue regions through a clear fluid. Such a system may include an imaging hood having one or more layers covering the distal opening and defines one or more apertures which control the infusion and controlled retention of the clearing fluid into the hood. In this manner, the amount of clearing fluid may be limited and the clarity of the imaging of the underlying tissue through the fluid within the hood may be maintained for relatively longer periods of time by inhibiting, delaying, or preventing the infusion of surrounding blood into the viewing field. The aperture size may be controlled to decrease or increase through selective inflation of the membrane or other mechanisms.Type: ApplicationFiled: January 16, 2013Publication date: May 23, 2013Applicant: VOYAGE MEDICAL, INC.Inventors: Vahid SAADAT, Edmund TAM, Chris A. ROTHE, David MILLER, Ruey-Feng PEH
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Patent number: 8419613Abstract: Tissue visualization device having a fluid barrier is described herein where an imaging hood is temporarily sealed against a region of tissue to be treated while under direct visualization. Such a system may include a deployment catheter and an attached imaging hood deployable into an expanded configuration. The imaging hood is placed against or adjacent to the tissue to be imaged in a body lumen that is normally filled with an opaque bodily fluid such as blood. A field of view of the imaging element can be expanded and the blood can also be purged in part by inflating a balloon beyond the imaging hood where the balloon is integrally formed along an interior surface of the hood.Type: GrantFiled: September 13, 2011Date of Patent: April 16, 2013Assignee: Voyage Medical, Inc.Inventors: Vahid Saadat, Ruey-Feng Peh, Edmund Tam, Amir A. Abolfathi, Chris A. Rothe
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Patent number: 8417321Abstract: Flow reduction hood systems are described which facilitate the visualization of tissue regions through a clear fluid. Such a system may include an imaging hood having one or more layers covering the distal opening and defines one or more apertures which control the infusion and controlled retention of the clearing fluid into the hood. In this manner, the amount of clearing fluid may be limited and the clarity of the imaging of the underlying tissue through the fluid within the hood may be maintained for relatively longer periods of time by inhibiting, delaying, or preventing the infusion of surrounding blood into the viewing field. The aperture size may be controlled to decrease or increase through selective inflation of the membrane or other mechanisms.Type: GrantFiled: August 24, 2011Date of Patent: April 9, 2013Assignee: Voyage Medical, IncInventors: Vahid Saadat, Edmund Tam, Chris A. Rothe, David Miller, Ruey-Feng Peh
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Publication number: 20130023731Abstract: Tissue visualization devices and variations thereof are described herein where such devices may utilize a variety of methods for facilitating clearing of the device of opaque bodily fluids and sealing between the device and the underlying tissue surface. Additionally, methods and devices for enhancing navigation of the device through a patient body are also described.Type: ApplicationFiled: June 18, 2012Publication date: January 24, 2013Applicant: VOYAGE MEDICAL, INC.Inventors: Vahid SAADAT, Chris A. ROTHE, Edmund A. TAM, Ruey-Feng PEH
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Patent number: 8333012Abstract: Electrode placement and connection systems are described which allow for the electrical connection and maintenance of one or more electrodes positioned on a substrate which is subjected to a variety of mechanical stresses. Such a system may include an imaging hood having an aperture through which transparent fluid is flowed and one or more electrodes positioned along or about the hood. As the hood is configured between a low-profile and opened configuration, these electrodes may remain electrically coupled despite the mechanical stresses subjected to the electrodes and the connections thereto.Type: GrantFiled: October 8, 2009Date of Patent: December 18, 2012Assignee: Voyage Medical, Inc.Inventors: Chris A. Rothe, Isidro M. Gandionco, Edmund Tam, Vahid Saadat, David Miller, Zachary J. Malchano, Veerappan Swaminathan
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Patent number: 8330873Abstract: Various embodiments are described herein for a universal television receiver that is capable of processing television channel signals broadcast according to a variety of analog and digital broadcast standards. An overmodulation handling mode is used that modifies operation when locking onto a picture carrier signal frequency in the presence of overmodulation.Type: GrantFiled: March 4, 2008Date of Patent: December 11, 2012Inventors: Larry Silver, Vyacheslav Shyshkin, Edmund Tam, Gary Cheng, Steve Selby
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Patent number: 8221310Abstract: Tissue visualization devices and variations thereof are described herein where such devices may utilize a variety of methods for facilitating clearing of the device of opaque bodily fluids and sealing between the device and the underlying tissue surface. Additionally, methods and devices for enhancing navigation of the device through a patient body are also described.Type: GrantFiled: August 30, 2007Date of Patent: July 17, 2012Assignee: Voyage Medical, Inc.Inventors: Vahid Saadat, Chris A. Rothe, Edmund Tam, Ruey-Feng Peh
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Patent number: 8131350Abstract: Systems for the stabilization of visualization catheters are described herein which facilitate the deployment and retraction of an imaging hood from a catheter. Such systems may include a deployment catheter and an imaging hood having one or more structural elements which may be integrated or advanced into the hood independently of the hood itself. Moreover, additional features such as rapid exchange ports may be integrated along the hood or along the catheter proximal to the hood to facilitate intravascular procedures and treatments.Type: GrantFiled: December 20, 2007Date of Patent: March 6, 2012Assignee: Voyage Medical, Inc.Inventors: Vahid A. Saadat, Chris A. Rothe, Ruey-Feng Peh, Edmund Tam
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Publication number: 20120004577Abstract: Tissue visualization device and method variations are described herein where an imaging hood is temporarily sealed against a region of tissue to be treated while under direct visualization. Such a system may include a deployment catheter and an attached imaging hood deployable into an expanded configuration. The imaging hood is placed against or adjacent to the tissue to be imaged in a body lumen that is normally filled with an opaque bodily fluid such as blood. A translucent or transparent fluid is pumped into the hood until the fluid displaces any blood leaving a clear region of tissue to be imaged via an imaging element. Temporary sealing against the tissue can be achieved in a number of ways such as circumferential balloons inflatable within the hood or other sealing techniques. A field of view of the imaging element can be expanded by inflating the balloon beyond the imaging hood.Type: ApplicationFiled: September 13, 2011Publication date: January 5, 2012Applicant: VOYAGE MEDICAL, INC.Inventors: Vahid SAADAT, Ruey-Feng PEH, Edmund A. TAM, Amir ABOLFATHI, Chris A. ROTHE
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Publication number: 20110306833Abstract: Flow reduction hood systems are described which facilitate the visualization of tissue regions through a clear fluid. Such a system may include an imaging hood having one or more layers covering the distal opening and defines one or more apertures which control the infusion and controlled retention of the clearing fluid into the hood. In this manner, the amount of clearing fluid may be limited and the clarity of the imaging of the underlying tissue through the fluid within the hood may be maintained for relatively longer periods of time by inhibiting, delaying, or preventing the infusion of surrounding blood into the viewing field. The aperture size may be controlled to decrease or increase through selective inflation of the membrane or other mechanisms.Type: ApplicationFiled: August 24, 2011Publication date: December 15, 2011Applicant: Voyage Medical, Inc.Inventors: Vahid SAADAT, Edmund TAM, Chris A. ROTHE, David MILLER, Ruey-Feng PEH
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Patent number: 8078266Abstract: Flow reduction hood systems are described which facilitate the visualization of tissue regions through a clear fluid. Such a system may include an imaging hood having one or more layers covering the distal opening and defines one or more apertures which control the infusion and controlled retention of the clearing fluid into the hood. In this manner, the amount of clearing fluid may be limited and the clarity of the imaging of the underlying tissue through the fluid within the hood may be maintained for relatively longer periods of time by inhibiting, delaying, or preventing the infusion of surrounding blood into the viewing field. The aperture size may be controlled to decrease or increase through selective inflation of the membrane or other mechanisms.Type: GrantFiled: February 5, 2008Date of Patent: December 13, 2011Assignee: Voyage Medical, Inc.Inventors: Vahid Saadat, Edmund Tam, Chris A. Rothe, David Miller, Ruey-Feng Peh
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Patent number: 8050746Abstract: Tissue visualization device and method variations are described herein where an imaging hood is temporarily sealed against a region of tissue to be treated while under direct visualization. Such a system may include a deployment catheter and an attached imaging hood deployable into an expanded configuration. The imaging hood is placed against or adjacent to the tissue to be imaged in a body lumen that is normally filled with an opaque bodily fluid such as blood. A translucent or transparent fluid is pumped into the hood until the fluid displaces any blood leaving a clear region of tissue to be imaged via an imaging element. Temporary sealing against the tissue can be achieved in a number of ways such as circumferential balloons inflatable within the hood or other sealing techniques. A field of view of the imaging element can be expanded by inflating the balloon beyond the imaging hood.Type: GrantFiled: July 10, 2007Date of Patent: November 1, 2011Assignee: Voyage Medical, Inc.Inventors: Vahid Saadat, Ruey-Feng Peh, Edmund Tam, Amir A. Abolfathi, Chris A. Rothe
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Publication number: 20100262140Abstract: Electrode placement and connection systems are described which allow for the electrical connection and maintenance of one or more electrodes positioned on a substrate which is subjected to a variety of mechanical stresses. Electrodes may also be formed on flexible circuit assemblies integrated within or along the hood. The circuit assemblies may also provide structural support to the hood during delivery and/or deployment. Such a system may include an imaging hood having an aperture through which transparent fluid is flowed and one or more electrodes positioned along or about the hood. As the hood is configured between a low-profile and opened configuration, these electrodes may remain electrically coupled despite the mechanical stresses subjected to the electrodes and the connections thereto.Type: ApplicationFiled: May 12, 2010Publication date: October 14, 2010Applicant: Voyage Medical, Inc.Inventors: John Paul WATSON, Edmund TAM, Vahid SAADAT
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Publication number: 20100256629Abstract: Methods and devices for treatment of the ostium are described herein. Examples of such devices include inflatable balloons which have one or more raised pores along a distal portion which act as conduits for providing saline flow from the balloon to facilitate visualization of the contacted tissue as well as providing for a conduction path for energy delivery. The balloon may be configured in various shapes to facilitate contact of the balloon in and against the ostium.Type: ApplicationFiled: April 6, 2010Publication date: October 7, 2010Applicant: Voyage Medical, Inc.Inventors: Bryan WYLIE, Edmund TAM, Gregory SCHMITZ, Isidro M. GANDIONCO, Lee James CARMACK, Vahid SAADAT, Veerappan SWAMINATHAN, Zachary J. MALCHANO, Zachary WEST
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Publication number: 20100094081Abstract: Electrode placement and connection systems are described which allow for the electrical connection and maintenance of one or more electrodes positioned on a substrate which is subjected to a variety of mechanical stresses. Such a system may include an imaging hood having an aperture through which transparent fluid is flowed and one or more electrodes positioned along or about the hood. As the hood is configured between a low-profile and opened configuration, these electrodes may remain electrically coupled despite the mechanical stresses subjected to the electrodes and the connections thereto.Type: ApplicationFiled: October 8, 2009Publication date: April 15, 2010Applicant: Voyage Medical, Inc.Inventors: Chris A. ROTHE, Isidro M. GANDIONCO, Edmund TAM, Vahid SAADAT, David MILLER, Zachary J. MALCHANO, Veerappan SWAMINATHAN
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Publication number: 20100010311Abstract: Methods and apparatus for efficient purging from an imaging hood are described which facilitate the visualization of tissue regions through a clear fluid. Such a system may include an imaging hood having one or more layers covering the distal opening and defines one or more apertures which control the infusion and controlled retention of the clearing fluid into the hood. In this manner, the amount of clearing fluid may be limited and the clarity of the imaging of the underlying tissue through the fluid within the hood may be maintained for relatively longer periods of time by inhibiting, delaying, or preventing the infusion of surrounding blood into the viewing field. The aperture size may be controlled to decrease or increase through selective inflation of the membrane or other mechanisms.Type: ApplicationFiled: July 8, 2009Publication date: January 14, 2010Applicant: Voyage Medical, Inc.Inventors: David MILLER, Vahid SAADAT, Zachary J. MALCHANO, Ruey-Feng PEH, Aseem K. THAKUR, Chris A. ROTHE, Edmund TAM
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Publication number: 20090299363Abstract: Off-axis visualization systems are described herein which facilitate the deployment, visualization, and retraction of an imaging element from a catheter. Such a system may include a deployment catheter and an attached imaging hood deployable into an expanded configuration as well as an imaging element, such as a CCD or CMOS imager, which may be deployed from a low profile configuration into a position which is off-axis relative to a longitudinal axis of the deployment catheter and/or imaging hood.Type: ApplicationFiled: December 20, 2007Publication date: December 3, 2009Inventors: Vahid Saadat, Chris A. Rothe, Ruey-Feng Peh, Edmund A. Tam
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Publication number: 20090275842Abstract: Systems for the stabilization of visualization catheters are described herein which facilitate the deployment and retraction of an imaging hood from a catheter. Such systems may include a deployment catheter and an imaging hood having one or more structural elements which may be integrated or advanced into the hood independently of the hood itself. Moreover, additional features such as rapid exchange ports may be integrated along the hood or along the catheter proximal to the hood to facilitate intravascular procedures and treatments.Type: ApplicationFiled: December 20, 2007Publication date: November 5, 2009Inventors: Vahid SAADAT, Chris A. ROTHE, Ruey-Feng PEH, Edmund A. TAM
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Publication number: 20090275799Abstract: Axial visualization systems which utilize axially aligned imaging instruments for visualizing through an imaging hood purged of blood via a transparent fluid are described where an imaging element extending from a support shaft may be aligned within a working lumen defined through a deployment catheter. The imaging element may be positioned distal to the hood in its collapsed state and within the hood in its expanded state. The imaging element may be configured to seat itself securely within the catheter or to angle itself to adjust the viewing angle. Additionally, a disposable visualization sheath having a transparent lens may also be utilized to house an imaging instrument therein.Type: ApplicationFiled: December 20, 2007Publication date: November 5, 2009Applicant: Voyage Medical, Inc.Inventors: Vahid SAADAT, Chris A. Rothe, Ruey-Feng Peh, Edmund Tam
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Publication number: 20090227999Abstract: Visual electrode ablation systems are described herein which include a deployment catheter and an attached imaging hood deployable into an expanded configuration. In use, the imaging hood is placed against or adjacent to a region of tissue to be imaged in a body lumen that is normally filled with an opaque bodily fluid such as blood. A translucent or transparent fluid, such as saline, can be pumped into the imaging hood until the fluid displaces any blood, thereby leaving a clear region of tissue to be imaged via an imaging element in the deployment catheter. An electric current may be passed through the fluid such that it passes directly to the tissue region being imaged and the electrical energy is conducted through the fluid without the need for a separate ablation probe or instrument to ablate the tissue being viewed.Type: ApplicationFiled: May 14, 2009Publication date: September 10, 2009Applicant: VOYAGE MEDICAL, INC.Inventors: N. Parker Willis, Zachary J. Malchano, Chris A. Rothe, Vahid Saadat, Ruey-Feng Peh, David Miller, Edmund Tam