Patents by Inventor Peter L. Callas
Peter L. Callas 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: 20220257223Abstract: Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end.Type: ApplicationFiled: August 27, 2019Publication date: August 18, 2022Applicant: MAQUET CARDIOVASCULAR LLCInventors: Liming LAU, Peter L. CALLAS, Michael C. STEWART, Geoffrey H. WILLIS, Ryan C. ABBOTT, Kimberly D. BARKMAN, Albert K. CHIN, Kenny L. DANG, Joseph N. LAMBERTI, Arthur M. LIN, Ravinder D. PAMNANI
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Patent number: 11141055Abstract: Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end.Type: GrantFiled: August 25, 2017Date of Patent: October 12, 2021Assignee: Maquet Cardiovascular LLCInventors: Liming Lau, Peter L. Callas, Michael C. Stewart, Geoffrey H. Willis, Ryan C. Abbott, Charles J. Adam, Kimberly D. Barkman, Kenny L. Dang, Joseph N. Lamberti, Arthur M. Lin, Ravinder D. Pamnani
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Publication number: 20210219835Abstract: Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end.Type: ApplicationFiled: April 6, 2021Publication date: July 22, 2021Applicant: MAQUET CARDIOVASCULAR LLCInventors: Liming LAU, Peter L. CALLAS, Michael C. STEWART, Geoffrey H. WILLIS, Ryan C. ABBOTT, Charles J. ADAM, Kimberly D. BARKMAN, Albert K. CHIN, Kenny L. DANG, Joseph N. LAMBERTI, Arthur M. LIN, Ravinder D. PAMNANI
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Publication number: 20200046393Abstract: Devices, tools and methods for performing minimally invasive surgical procedures. Methods of performing minimally invasive ablation procedures. Methods of performing rapid exchange of tools in a device while the device remains in a reduced-access surgical space.Type: ApplicationFiled: August 22, 2019Publication date: February 13, 2020Applicant: MAQUET CARDIOVASCULAR LLCInventors: Amar KENDALE, Juan I. PEREZ, Fred VILLAGOMEZ, Frederick BARRIGAR, Joseph N. LAMBERTI, Amit AGARWAL, Peter L. CALLAS, Michael C. STEWART, Arthur M. LIN, Ryan C. ABBOTT, Alfredo R. CANTU
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Publication number: 20190380688Abstract: Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end.Type: ApplicationFiled: August 27, 2019Publication date: December 19, 2019Applicant: MAQUET CARDIOVASCULAR LLCInventors: Liming LAU, Peter L. CALLAS, Michael C. STEWART, Geoffrey H. WILLIS, Ryan C. ABBOTT, Charles J. ADAM, Kimberley D. BARKMAN, Albert K. CHIN, Kenny L. DANG, Joseph N. LAMBERTI, Arthur M. LIN, Ravinder D. PAMNANI
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Publication number: 20180035988Abstract: Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end.Type: ApplicationFiled: August 24, 2017Publication date: February 8, 2018Applicant: Maquet Cardiovascular LLCInventors: Liming LAU, Peter L. CALLAS, Michael C. STEWART, Geoffrey H. WILLIS, Ryan C. ABBOTT, Charles J. ADAM, Kimberley D. BARKMAN, Albert K. CHIN, Kenny L. DANG, Joseph N. LAMBERTI, Arthur M. LIN, Ravi PAMNANI
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Publication number: 20170347996Abstract: Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end.Type: ApplicationFiled: August 25, 2017Publication date: December 7, 2017Applicant: Maquet Cardiovascular LLCInventors: Liming LAU, Peter L. CALLAS, Michael C. STEWART, Geoffrey H. WILLIS, Ryan C. ABBOTT, Charles J. ADAM, Kimberley D. BARKMAN, Albert K. CHIN, Kenny L. DANG, Joseph N. LAMBERTI, Arthur M. LIN, Ravi PAMNANI
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Patent number: 9610113Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels. The apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element.Type: GrantFiled: February 23, 2015Date of Patent: April 4, 2017Assignee: MAQUET CARDIOVASCULAR LLCInventors: Liming Lau, Arnold M. Escano, Jerry Jarrard, Samuel Ho, Ryan C. Abbott, Arthur M. Lin, Jesse McQuiston, Peter L. Callas, Geoffrey H. Willis, Michael C. Stewart, Kimberly D. Otto, Joseph N. Lamberti, Kenny L. Dang
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Patent number: 9533127Abstract: A method that includes introducing a catheter assembly to an obstructed region of a blood vessel lumen and recanalizing the obstructed region with the catheter assembly is disclosed. Prior to or during recanalization, a treatment agent may be delivered through the catheter assembly to a vessel region downstream to the obstructed region. The treatment agent may have a property that will inhibit reperfusion injury. Alternatively, a medical device may be introduced to an obstructed region of a blood vessel lumen and the obstructed region recanalized with the medical device. The treatment agent may be delivered to a vessel region downstream to the obstructed region. The treatment agent may include at least one of an immunosuppresant and an antioxidant.Type: GrantFiled: July 24, 2006Date of Patent: January 3, 2017Assignee: Abbott Cardiovascular Systems Inc.Inventors: Eugene T. Michal, Peter L. Callas, Florian N. Ludwig
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Patent number: 9504491Abstract: A method is provided including introducing a delivery device through a vessel wall to a treatment site within one of a peri-adventitial space or a pericardium adjacent a coronary blood vessel and delivering a treatment agent through the delivery device. The treatment agent is delivered through the delivery device according to conditions that hydraulically dissect tissue planes within the peri-adventitial space. A kit is provided including a delivery device having a needle to be advanced through one of an epicardium of a heart and a wall of a coronary blood vessel into a peri-adventitial space and a treatment agent comprising particles having an average diameter on the order of 15 microns or more to be delivered through the delivery device into the peri-adventitial space.Type: GrantFiled: November 7, 2007Date of Patent: November 29, 2016Assignee: Abbott Cardiovascular Systems Inc.Inventors: Peter L. Callas, Eric J. Willis, Fozan O. El-Nounou, Florian N. Ludwig, William E. Webler, Paul M. Consigny
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Publication number: 20150164575Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels. The apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element.Type: ApplicationFiled: February 23, 2015Publication date: June 18, 2015Applicant: MAQUET CARDIOVASCULAR LLCInventors: Liming LAU, Arnold M. ESCANO, Jerry JARRARD, Samuel HO, Ryan C. ABBOTT, Arthur M. LIN, Jesse MCQUISTON, Peter L. CALLAS, Geoffrey H. WILLIS, Michael C. STEWART, Kimberly D. OTTO, Joseph N. LAMBERTI, Kenny L. DANG
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Publication number: 20150142041Abstract: Devices, tools and methods for performing minimally invasive surgical procedures. Methods of performing minimally invasive ablation procedures. Methods of performing rapid exchange of tools in a device while the device remains in a reduced-access surgical space.Type: ApplicationFiled: December 22, 2014Publication date: May 21, 2015Applicant: MAQUET Cardiovascular LLCInventors: Amar Kendale, Juan I. Perez, Fred Villagomez, Frederick Barrigar, Joseph N. Lamberti, Amit Agarwal, Peter L. Callas, Michael C. Stewart, Arthur M. Lin, Ryan C. Abbott, Alfredo R. Cantu
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Patent number: 8961503Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels. The apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element.Type: GrantFiled: January 6, 2014Date of Patent: February 24, 2015Assignee: MAQUET Cardiovascular LLCInventors: Liming Lau, Arnold M. Escano, Jerry Jarrard, Sam Ho, Ryan C. Abbott, Arthur M. Lin, Jesse McQuiston, Peter L. Callas, Geoffrey H. Willis, Michael C. Stewart, Kimberly D. Barkman, Joseph N. Lamberti, Kenny L. Dang
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Publication number: 20140194876Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels. The apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element.Type: ApplicationFiled: January 6, 2014Publication date: July 10, 2014Applicant: MAQUET CARDIOVASCULAR LLCInventors: Liming Lau, Arnold M. Escano, Jerry Jarrard, Sam Ho, Ryan C. Abbott, Arthur M. Lin, Jesse McQuiston, Peter L. Callas, Geoffrey H. Willis, Michael C. Stewart, Kimberly D. Barkman, Joseph N. Lamberti, Kenny L. Dang
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Publication number: 20130006288Abstract: A device and method for accessing a pericardial space of the heart includes a shaft having a cavity at a distal end, a suction lumen terminating in a distal port within the cavity and a hollow needle having a distal tip extending into the cavity. The cavity may be a recess in the shaft into which the distal tip of the needle fixedly protrudes. In other embodiments, the cavity is formed by an inflatable member positioned at the distal end of the shaft and the needle is slidable relative to the shaft. Suction is applied at the cavity to draw a pericardial bleb. The needle pierces the pericardial bleb for accessing the pericardial space and also facilitates delivery of payloads into the pericardial space.Type: ApplicationFiled: July 2, 2012Publication date: January 3, 2013Inventors: Peter L. Callas, Gary L. Hague, John S. Greenland, Bruce A. Tockman, Peter T. Kelley, Jason A. Shiroff, David B. Yingling, Ted Schulte
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Publication number: 20110257643Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels. The apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element.Type: ApplicationFiled: March 14, 2011Publication date: October 20, 2011Applicant: MAQUET CARDIOVASCULAR LLCInventors: Liming Lau, Arthur M. Lin, Sam Ho, Ryan C. Abbott, Kenny L. Dang, Jesse McQuiston, Peter L. Callas, Arnold M. Escano, Michael C. Stewart, Jerry Jarrard, Joseph N. Lamberti, Justin N. Williams, Kristopher Yee
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Patent number: 8034098Abstract: An apparatus is described for supporting and/or constricting a surface of a valve annulus. The apparatus includes a tubular member of dimensions suitable for insertion into a body vessel. The tubular member includes at least two first segments attachable to an interior wall of the body vessel. The tubular member further includes at least one second segment which is capable of decreasing its axial length to draw one of the first segments towards the other first segment.Type: GrantFiled: September 28, 2006Date of Patent: October 11, 2011Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Peter L. Callas, Richard J. Saunders
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Patent number: 7918848Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels, include a pair of relatively movable jaws at a distal end of an elongated shaft. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. A force-limiting mechanism is provided to limit the pressure applied to the tissue by the jaws to ensure that the tissue is severed and the ends effectively welded within a short amount of time.Type: GrantFiled: March 25, 2005Date of Patent: April 5, 2011Assignee: Maquet Cardiovascular, LLCInventors: Liming Lau, Arnold M. Escano, Jerry Jarrard, Sam Ho, Ryan C. Abbott, Arthur M. Lin, Jesse McQuiston, Peter L. Callas, Geoffrey H. Willis, Michael C. Stewart, Kimberly D. Barkman, Joseph N. Lamberti, Kenny L. Dang
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Publication number: 20090118700Abstract: A method is provided including introducing a delivery device through a vessel wall to a treatment site within one of a peri-adventitial space or a pericardium adjacent a coronary blood vessel and delivering a treatment agent through the delivery device. The treatment agent is delivered through the delivery device according to conditions that hydraulically dissect tissue planes within the peri-adventitial space. A kit is provided including a delivery device having a needle to be advanced through one of an epicardium of a heart and a wall of a coronary blood vessel into a peri-adventitial space and a treatment agent comprising particles having an average diameter on the order of 15 microns or more to be delivered through the delivery device into the peri-adventitial space.Type: ApplicationFiled: November 7, 2007Publication date: May 7, 2009Inventors: Peter L. Callas, Eric J. Willis, Fozan O. El-Nounou, Florian N. Ludwig, William E. Webler, Paul M. Consigny
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Publication number: 20080306335Abstract: Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end.Type: ApplicationFiled: June 1, 2006Publication date: December 11, 2008Inventors: Liming Lau, Peter L. Callas, Michael C. Stewart, Geoffrey H. Willis, Ryan C. Abbott, Charles J. Adam, Kimberly D. Barkman, Albert K. Chin, Kenny L. Dang, Joseph N. Lamberti, Arthur M. Lin, Ravi Pamnani