Patents by Inventor Asha Shrinivas Nayak
Asha Shrinivas Nayak 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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Patent number: 9839771Abstract: Apparatus and methods are provided for accessing body lumens and/or for delivering instruments into body lumens, e.g., vessels within a patient's vasculature. A flexible sheath is provided that is expandable from a contracted condition to an enlarged condition wherein the sheath at least partially defines a lumen therein. The sheath is lubricious and has a relatively thin wall, thereby providing a collapsible/expandable guide for delivering fluids and/or instruments through tortuous anatomy and/or into relatively narrow passages. The sheath is advanced from an entry site to a body lumen in the contracted condition. Once the sheath reaches a target body lumen, the sheath is expanded to the enlarged condition, thereby defining a lumen within the sheath, and fluids and/or instruments are introduced into the body lumen via the sheath lumen. Upon completing the procedure, the sheath is removed from the body lumen.Type: GrantFiled: March 18, 2009Date of Patent: December 12, 2017Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITYInventors: Christian Scott Eversull, Nicholas J. Mourlas, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Patent number: 8439824Abstract: Apparatus and methods for locating morphological features within a body cavity using a catheter including proximal and distal ends, a transparent balloon carried on the distal end, and an optical imaging assembly carried on the distal end for imaging through the balloon. The balloon includes a channel extending therethrough to a lumen extending through the catheter. A guidewire or other localization member is received in the lumen that is extendable through the channel. During use, the catheter is inserted into a right atrium of a heart, and the balloon is expanded and placed against the wall of the heart to locate the coronary sinus. Sufficient force is applied to clear blood between the surface and the wall and clear the field of view of the imaging assembly. The catheter is manipulated to locate the coronary sinus, whereupon the localization member is advanced into the coronary sinus.Type: GrantFiled: August 15, 2011Date of Patent: May 14, 2013Assignee: The Board of Directors of the Leland Stanford, Jr. UniversityInventors: Nicholas J. Mourlas, Christian Scott Eversull, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Publication number: 20110301417Abstract: Apparatus and methods for locating morphological features within a body cavity using a catheter including proximal and distal ends, a transparent balloon carried on the distal end, and an optical imaging assembly carried on the distal end for imaging through the balloon. The balloon includes a channel extending therethrough to a lumen extending through the catheter. A guidewire or other localization member is received in the lumen that is extendable through the channel. During use, the catheter is inserted into a right atrium of a heart, and the balloon is expanded and placed against the wall of the heart to locate the coronary sinus. Sufficient force is applied to clear blood between the surface and the wall and clear the field of view of the imaging assembly. The catheter is manipulated to locate the coronary sinus, whereupon the localization member is advanced into the coronary sinus.Type: ApplicationFiled: August 15, 2011Publication date: December 8, 2011Applicant: The Board Of Trustees of the Leland Stanford Jr. UniversityInventors: Nicholas J. Mourlas, Christian Scott Eversull, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Patent number: 8016748Abstract: Apparatus and methods for locating morphological features within a body cavity using a catheter including proximal and distal ends, a transparent balloon carried on the distal end, and an optical imaging assembly carried on the distal end for imaging through the balloon. The balloon includes a channel extending therethrough to a lumen extending through the catheter. A guidewire or other localization member is received in the lumen that is extendable through the channel. During use, the catheter is inserted into a right atrium of a heart, and the balloon is expanded and placed against the wall of the heart to locate the coronary sinus. Sufficient force is applied to clear blood between the surface and the wall and clear the field of view of the imaging assembly. The catheter is manipulated to locate the coronary sinus, whereupon the localization member is advanced into the coronary sinus.Type: GrantFiled: November 8, 2005Date of Patent: September 13, 2011Assignee: The Board of Trustees of the Leland Stanford Jr. UniversityInventors: Nicholas J. Mourlas, Christian Scott Eversull, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Publication number: 20110034790Abstract: Apparatus and methods for locating morphological features within a body cavity using a catheter including proximal and distal ends, a transparent balloon carried on the distal end, and an optical imaging assembly carried on the distal end for imaging through the balloon. The balloon includes a channel extending therethrough to a lumen extending through the catheter. A guidewire or other localization member is received in the lumen that is extendable through the channel. During use, the catheter is inserted into a right atrium of a heart, and the balloon is expanded and placed against the wall of the heart to locate the coronary sinus. Sufficient force is applied to clear blood between the surface and the wall and clear the field of view of the imaging assembly. The catheter is manipulated to locate the coronary sinus, whereupon the localization member is advanced into the coronary sinus.Type: ApplicationFiled: October 18, 2010Publication date: February 10, 2011Applicant: The Board of Trustees of the Leland Stanford Jr. UniversityInventors: Nicholas J. Mourlas, Christian Scott Eversull, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Patent number: 7762995Abstract: Apparatus and methods are provided for accessing body lumens and/or for delivering instruments into body lumens, e.g., vessels within a patient's vasculature. A flexible sheath is provided that is expandable from a contracted condition to an enlarged condition wherein the sheath at least partially defines a lumen therein. The sheath is lubricious and has a relatively thin wall, thereby providing a collapsible/expandable guide for delivering fluids and/or instruments through tortuous anatomy and/or into relatively narrow passages. The sheath is advanced from an entry site to a body lumen in the contracted condition. Once the sheath reaches a target body lumen, the sheath is expanded to the enlarged condition, thereby defining a lumen within the sheath, and fluids and/or instruments are introduced into the body lumen via the sheath lumen. Upon completing the procedure, the sheath is removed from the body lumen.Type: GrantFiled: April 24, 2003Date of Patent: July 27, 2010Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Christian Scott Eversull, Nicholas J. Mourlas, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Publication number: 20090182278Abstract: Apparatus and methods are provided for accessing body lumens and/or for delivering instruments into body lumens, e.g., vessels within a patient's vasculature. A flexible sheath is provided that is expandable from a contracted condition to an enlarged condition wherein the sheath at least partially defines a lumen therein. The sheath is lubricious and has a relatively thin wall, thereby providing a collapsible/expandable guide for delivering fluids and/or instruments through tortuous anatomy and/or into relatively narrow passages. The sheath is advanced from an entry site to a body lumen in the contracted condition. Once the sheath reaches a target body lumen, the sheath is expanded to the enlarged condition, thereby defining a lumen within the sheath, and fluids and/or instruments are introduced into the body lumen via the sheath lumen. Upon completing the procedure, the sheath is removed from the body lumen.Type: ApplicationFiled: March 18, 2009Publication date: July 16, 2009Applicant: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Christian Scott Eversull, Nicholas J. Mourlas, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Patent number: 7549974Abstract: A directional balloon is provided that can be used for a medical intervention of a body lumen. In one aspect, the directional balloon inflates in a distal to proximal direction and deflates in a proximal to distal direction. In another aspect, the directional balloon inflates in a proximal to distal direction and deflates in a distal to proximal direction. The directional balloon is capable of providing an occlusive seal to protect against embolization. A suction catheter with a control means is provided to provide suction in a controlled fashion in a body lumen. The suction catheter is used during periods of a medical intervention that risks distal embolization. When turned on, the suction catheter is capable of removing unwanted materials. The suction means could be operated by a control means.Type: GrantFiled: May 30, 2003Date of Patent: June 23, 2009Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventor: Asha Shrinivas Nayak
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Patent number: 6979290Abstract: An apparatus for locating morphological features within a body cavity includes a catheter including proximal and distal ends, a transparent balloon carried on the distal end, and an optical imaging assembly carried on the distal end for imaging through the balloon. The balloon includes a channel extending therethrough to a lumen extending through the catheter. A guidewire or other localization member is received in the lumen that is extendabe through the channel. During use, the catheter is inserted into a right atrium of a heart, and the balloon is expanded and placed against the wall of the heart to locate the coronary sinus. Sufficient force is applied to clear blood between the surface and the wall and clear the field of view of the imaging assembly. The catheter is manipulated to locate the coronary sinus, whereupon the localization member is advanced into the coronary sinus.Type: GrantFiled: May 29, 2003Date of Patent: December 27, 2005Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Nicholas J. Mourlas, Christian Scott Eversull, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Publication number: 20040097788Abstract: An apparatus for locating morphological features within a body cavity includes a catheter including proximal and distal ends, a transparent balloon carried on the distal end, and an optical imaging assembly carried on the distal end for imaging through the balloon. The balloon includes a channel extending therethrough to a lumen extending through the catheter. A guidewire or other localization member is received in the lumen that is extendabe through the channel. During use, the catheter is inserted into a right atrium of a heart, and the balloon is expanded and placed against the wall of the heart to locate the coronary sinus. Sufficient force is applied to clear blood between the surface and the wall and clear the field of view of the imaging assembly. The catheter is manipulated to locate the coronary sinus, whereupon the localization member is advanced into the coronary sinus.Type: ApplicationFiled: May 29, 2003Publication date: May 20, 2004Inventors: Nicholas J. Mourlas, Christian Scott Eversull, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller
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Publication number: 20040049152Abstract: A directional balloon is provided that can be used for a medical intervention of a body lumen. In one aspect, the directional balloon inflates in a distal to proximal direction and deflates in a proximal to distal direction. In another aspect, the directional balloon inflates in a proximal to distal direction and deflates in a distal to proximal direction. The directional balloon is capable of providing an occlusive seal to protect against embolization. A suction catheter with a control means is provided to provide suction in a controlled fashion in a body lumen. The suction catheter is used during periods of a medical intervention that risks distal embolization. When turned on, the suction catheter is capable of removing unwanted materials. The suction means could be operated by a control means.Type: ApplicationFiled: May 30, 2003Publication date: March 11, 2004Inventor: Asha Shrinivas Nayak
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Publication number: 20030233115Abstract: Apparatus and methods are provided for accessing body lumens and/or for delivering instruments into body lumens, e.g., vessels within a patient's vasculature. A flexible sheath is provided that is expandable from a contracted condition to an enlarged condition wherein the sheath at least partially defines a lumen therein. The sheath is lubricious and has a relatively thin wall, thereby providing a collapsible/expandable guide for delivering fluids and/or instruments through tortuous anatomy and/or into relatively narrow passages. The sheath is advanced from an entry site to a body lumen in the contracted condition. Once the sheath reaches a target body lumen, the sheath is expanded to the enlarged condition, thereby defining a lumen within the sheath, and fluids and/or instruments are introduced into the body lumen via the sheath lumen. Upon completing the procedure, the sheath is removed from the body lumen.Type: ApplicationFiled: April 24, 2003Publication date: December 18, 2003Inventors: Christian Scott Eversull, Nicholas J. Mourlas, Stephen Arie Leeflang, Asha Shrinivas Nayak, David John Miller