Patents by Inventor Vihar Surti
Vihar Surti 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: 11660432Abstract: An expandable dilation member may include a proximally-tapered portion to dilate a stricture. The dilation member may be distally advanced in an unexpanded state over a wire guide through the stricture. The dilation member may then be configured in an expanded state, where the dilation member has a longitudinal profile that includes the proximally-tapered portion. A handle assembly proximally pulls the dilation member in the expanded state. In response, the proximally-tapered portion engages with and biases the stricture. When biasing the stricture, the proximally-tapered portion exerts a plurality of different types of forces, including a shearing force, a radial force, and in some procedures, a torsional force. In some embodiments, the proximally-tapered portion has a continuous taper from a smallest diameter to a largest diameter. In other embodiments, the proximally-tapered portion has at least one constant-diameter portion longitudinally disposed in between the smallest diameter and the largest diameter.Type: GrantFiled: September 30, 2019Date of Patent: May 30, 2023Assignee: COOK MEDICAL TECHNOLOGIES LLCInventors: John Crowder Sigmon, Jr., Shaun D. Gittard, Gregory J. Hardy, Vihar Surti
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Patent number: 11517710Abstract: Methods of modifying the luminal profile of a body vessel are described. An example method comprises advancing a cannula out of the distal end of a catheter disposed within the lumen of a body vessel of an animal and toward a target site on the wall of the body vessel; passing contrast dye through the cannula toward the target site; simultaneously continuing the advancing and passing until the distal end of the cannula punctures the inner layer of the wall of the body vessel at the target site; and passing a bulking agent through the cannula and into a space between connective tissue layers surrounding the vessel wall at the target site. Medical devices, medical device assemblies, and kits are also described.Type: GrantFiled: November 22, 2019Date of Patent: December 6, 2022Assignee: Cook Medical Technologies LLCInventors: John C. Sigmon, Jr., Vihar Surti
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Publication number: 20200101271Abstract: An expandable dilation member may include a proximally-tapered portion to dilate a stricture. The dilation member may be distally advanced in an unexpanded state over a wire guide through the stricture. The dilation member may then be configured in an expanded state, where the dilation member has a longitudinal profile that includes the proximally-tapered portion. A handle assembly proximally pulls the dilation member in the expanded state. In response, the proximally-tapered portion engages with and biases the stricture. When biasing the stricture, the proximally-tapered portion exerts a plurality of different types of forces, including a shearing force, a radial force, and in some procedures, a torsional force. In some embodiments, the proximally-tapered portion has a continuous taper from a smallest diameter to a largest diameter. In other embodiments, the proximally-tapered portion has at least one constant-diameter portion longitudinally disposed in between the smallest diameter and the largest diameter.Type: ApplicationFiled: September 30, 2019Publication date: April 2, 2020Applicant: Cook Medical Technologies LLCInventors: John Crowder Sigmon, JR., Shaun D. Gittard, Gregory J. Hardy, Vihar Surti
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Publication number: 20200086079Abstract: Methods of modifying the luminal profile of a body vessel are described. An example method comprises advancing a cannula out of the distal end of a catheter disposed within the lumen of a body vessel of an animal and toward a target site on the wall of the body vessel; passing contrast dye through the cannula toward the target site; simultaneously continuing the advancing and passing until the distal end of the cannula punctures the inner layer of the wall of the body vessel at the target site; and passing a bulking agent through the cannula and into a space between connective tissue layers surrounding the vessel wall at the target site. Medical devices, medical device assemblies, and kits are also described.Type: ApplicationFiled: November 22, 2019Publication date: March 19, 2020Applicant: COOK MEDICAL TECHNOLOGIES LLCInventors: John C. Sigmon, JR., Vihar Surti
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Patent number: 10512751Abstract: Methods of modifying the luminal profile of a body vessel are described. An example method comprises advancing a cannula out of the distal end of a catheter disposed within the lumen of a body vessel of an animal and toward a target site on the wall of the body vessel; passing contrast dye through the cannula toward the target site; simultaneously continuing the advancing and passing until the distal end of the cannula punctures the inner layer of the wall of the body vessel at the target site; and passing a bulking agent through the cannula and into a space between connective tissue layers surrounding the vessel wall at the target site. Medical devices, medical device assemblies, and kits are also described.Type: GrantFiled: November 21, 2018Date of Patent: December 24, 2019Assignee: Cook Medical Technologies LLCInventors: John C. Sigmon, Jr., Vihar Surti
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Publication number: 20190083740Abstract: Methods of modifying the luminal profile of a body vessel are described. An example method comprises advancing a cannula out of the distal end of a catheter disposed within the lumen of a body vessel of an animal and toward a target site on the wall of the body vessel; passing contrast dye through the cannula toward the target site; simultaneously continuing the advancing and passing until the distal end of the cannula punctures the inner layer of the wall of the body vessel at the target site; and passing a bulking agent through the cannula and into a space between connective tissue layers surrounding the vessel wall at the target site. Medical devices, medical device assemblies, and kits are also described.Type: ApplicationFiled: November 21, 2018Publication date: March 21, 2019Inventors: John C. Sigmon, JR., Vihar Surti
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Patent number: 10173027Abstract: Methods of modifying the luminal profile of a body vessel are described. An example method comprises advancing a cannula out of the distal end of a catheter disposed within the lumen of a body vessel of an animal and toward a target site on the wall of the body vessel; passing contrast dye through the cannula toward the target site; simultaneously continuing the advancing and passing until the distal end of the cannula punctures the inner layer of the wall of the body vessel at the target site; and passing a bulking agent through the cannula and into a space between connective tissue layers surrounding the vessel wall at the target site. Medical devices, medical device assemblies, and kits are also described.Type: GrantFiled: October 7, 2016Date of Patent: January 8, 2019Assignee: Cook Medical Technologies LLCInventors: John C. Sigmon, Jr., Vihar Surti
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Publication number: 20170100559Abstract: Methods of modifying the luminal profile of a body vessel are described. An example method comprises advancing a cannula out of the distal end of a catheter disposed within the lumen of a body vessel of an animal and toward a target site on the wall of the body vessel; passing contrast dye through the cannula toward the target site; simultaneously continuing the advancing and passing until the distal end of the cannula punctures the inner layer of the wall of the body vessel at the target site; and passing a bulking agent through the cannula and into a space between connective tissue layers surrounding the vessel wall at the target site. Medical devices, medical device assemblies, and kits are also described.Type: ApplicationFiled: October 7, 2016Publication date: April 13, 2017Inventors: John C. Sigmon, JR., Vihar Surti
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Patent number: 9451875Abstract: A flexible lens is mounted to the end of an elongate medical device having a camera, such as an endoscope. The lens is generally solid and is made from a translucent, flexible, and resilient material. In a medical environment, the lens can be pressed against a vessel wall in a patient to enlarge the area viewed by the camera, and can further adapt to the shape of the wall to limit trauma on the patient. When pressed against the vessel wall, the lens can become longitudinally compressed, while becoming wider. The wider and compressed shape of the lens will push blood away from the viewing area to increase the clarity of the camera's field of view.Type: GrantFiled: December 6, 2013Date of Patent: September 27, 2016Assignee: Cook Medical Technologies LLCInventors: John C. Sigmon, Jr., Vihar Surti, Michelle D. Martinez, Tyler Evans McLawhorn
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Publication number: 20160038647Abstract: A fluoropolymer medical device (e.g., a sphincterotome) has a thin-film coating deposited using a technique such as Atomic Layer Deposition. The thin-film coating may be a ceramic coating or a metal coating and a ceramic coating may further have an overlying ink coating such as a conducting ink or a radiopaque marker. The ceramic coating improves the application and adherence of the ink coating to the fluoropolymer device.Type: ApplicationFiled: August 4, 2015Publication date: February 11, 2016Inventors: Shaun Gittard, Michelle D. Martinez, John Crowder Sigmon, JR., Tyler Evans McLawhorn, Jillian Haac, Vihar Surti
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Patent number: 9144459Abstract: A radiofrequency tissue ablation device includes an elongate outer cannula having proximal and distal ends and an intermediate length therebetween where a longitudinal region of the intermediate length is configured as an ablation electrode. A cannula lumen extends longitudinally through the cannula. A stylet extends slidably through the lumen and is secured to the cannula between the ablation electrode and the cannula distal end. The ablation electrode includes a plurality of substantially parallel helical apertures disposed around and extending through a cannula circumference.Type: GrantFiled: July 19, 2012Date of Patent: September 29, 2015Assignee: Cook Medical Technologies LLCInventors: Vihar Surti, John Sigmon
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Publication number: 20140163317Abstract: A flexible lens is mounted to the end of an elongate medical device having a camera, such as an endoscope. The lens is generally solid and is made from a translucent, flexible, and resilient material. In a medical environment, the lens can be pressed against a vessel wall in a patient to enlarge the area viewed by the camera, and can further adapt to the shape of the wall to limit trauma on the patient. When pressed against the vessel wall, the lens can become longitudinally compressed, while becoming wider. The wider and compressed shape of the lens will push blood away from the viewing area to increase the clarity of the camera's field of view.Type: ApplicationFiled: December 6, 2013Publication date: June 12, 2014Applicant: Cook Medical Technologies LLCInventors: John C. Sigmon, Jr., Vihar Surti, Michelle D. Martinez, Tyler Evans McLawhorn
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Patent number: 8728103Abstract: The present embodiments provide medical apparatuses, systems, and methods for rapidly forming an anastomosis between two viscera. The medical apparatus generally comprises two bases with two clamp members rotatably attached to the bases, the clamp members being capable of compressing tissue. The system generally comprises positioning and then deploying the medical apparatus between and within two stomas via an elongate member. The method generally comprises using the medical system to create an anastomosis between the stomach and the jejunum.Type: GrantFiled: May 13, 2010Date of Patent: May 20, 2014Assignee: Cook Medical Technologies LLCInventors: Vihar Surti, Tyler McLawhorn, Richard W. Ducharme
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Publication number: 20140025054Abstract: A radiofrequency tissue ablation device includes an elongate outer cannula having proximal and distal ends and an intermediate length therebetween where a longitudinal region of the intermediate length is configured as an ablation electrode. A cannula lumen extends longitudinally through the cannula. A stylet extends slidably through the lumen and is secured to the cannula between the ablation electrode and the cannula distal end. The ablation electrode includes a plurality of substantially parallel helical apertures disposed around and extending through a cannula circumference.Type: ApplicationFiled: July 19, 2012Publication date: January 23, 2014Inventors: Vihar Surti, John Sigmon
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Patent number: 8545525Abstract: The present embodiments provide medical apparatuses and methods for rapidly forming an anastomosis between two viscera. The medical apparatus generally comprises affixing a clamp to an elongate member. The method generally comprises positioning and then deploying the medical apparatus between and within two stomas via an elongate member.Type: GrantFiled: October 21, 2010Date of Patent: October 1, 2013Assignee: Cook Medical Technologies LLCInventors: Vihar Surti, Tyler McLawhorn, Richard W. Ducharme
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Publication number: 20110106109Abstract: The present embodiments provide medical apparatuses and methods for rapidly forming an anastomosis between two viscera. The medical apparatus generally comprises affixing a clamp to an elongate member. The method generally comprises positioning and then deploying the medical apparatus between and within two stomas via an elongate member.Type: ApplicationFiled: October 21, 2010Publication date: May 5, 2011Inventors: Vihar Surti, Tyler McLawhorn, Richard W. Ducharme
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Publication number: 20100331866Abstract: The present embodiments provide medical apparatuses, systems, and methods for rapidly forming an anastomosis between two viscera. The medical apparatus generally comprises two bases with two clamp members rotatably attached to the bases, the clamp members being capable of compressing tissue. The system generally comprises positioning and then deploying the medical apparatus between and within two stomas via an elongate member. The method generally comprises using the medical system to create an anastomosis between the stomach and the jejunum.Type: ApplicationFiled: May 13, 2010Publication date: December 30, 2010Inventors: Vihar Surti, Tyler McLawhorn, Richard W. Ducharme
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Publication number: 20080108874Abstract: An improved ligating system with a ligating barrel having an adjustable diameter for use with endoscopes of varying sizes is disclosed. The adjustable diameter may be provided by a collet, a flexible helical band, a plurality of screws, or a tapered elastomeric section.Type: ApplicationFiled: July 31, 2007Publication date: May 8, 2008Inventors: David Waller, Hilbert Brown, Patricia Chilton, David Hardin, Kimberly Ingram, Kenneth Kennedy, Vihar Surti, Marcie Yount
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Publication number: 20070293875Abstract: A clip device delivery apparatus for hemostasis has an introducer tube, such as an endoscope or sheath having a distal end portion and working channel receiving an operating wire detachably securing a clip device comprising tissue engaging arms and a sliding ring for closing the arms. A protective cap having a tube mounting section and a distal section having a receiving chamber define a passageway therebetween, the mounting section being mounted to the introducer tube distal end portion and the distal section receiving tissue and clip arms to close about tissue. The operating wire and clip device are inserted within the working channel. Methods of grasping tissue are provided using the introducer tube introduced endoscopically into a patient, tissue suctioned and clip arms deployed into tissue receiving chamber, sliding ring moved distally to close the clip arms about the tissue, and the clip detached from the operating wire.Type: ApplicationFiled: March 5, 2007Publication date: December 20, 2007Applicant: Wilson-Cook Medical, Inc.Inventors: Roy Soetikno, Vihar Surti
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Publication number: 20070282355Abstract: A clip device for hemostasis includes a clip having a proximal end portion and at least two arm portions extending from the proximal end portion and provided with a tendency to open. A sliding ring is provided for closing the arm portions of the clip. A first retainer is attached to the clip, and the first retainer is configured to be releasably secured to a second retainer that may be attached to an operating wire or a torque cable. In operation, the clip device is advanced to a target site in a body cavity. An outer sheath is retracted to expose the clip, causing the arms to open. An inner sheath is advanced distally, causing the sliding ring to advance distally to close the arms of the clip. Stop elements may be disposed on the clip to ensure that he sliding ring is not advanced distally over the clip. Then, the first retainer is disengaged from the second retainer. Various mechanisms are disclosed to permit the first and second retainers to disengage from one another.Type: ApplicationFiled: May 30, 2007Publication date: December 6, 2007Applicant: Wilson-Cook Medical Inc.Inventors: Hilbert Brown, Steve Chen, Caroline Gayzik, Richard Ducharme, John Karpiel, Kathryn Kornrumpf, Vihar Surti