Patents by Inventor Chandru V. Chandrasekaran

Chandru V. Chandrasekaran 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).

  • RF ablation and ultrasound catheter for crossing chronic total occlusions
    Patent number: 6638222
    Abstract: A combination catheter includes an ultrasound transducer and RF ablation electrode. The ultrasound transducer transmits ultrasound signals into and receives echo signals from a vessel. The echo signals are processed and used to produce an image of the tissue surrounding the catheter. A driveshaft rotates the ultrasound transducer to obtain a 360° view of the vessel wall. At the distal end of the driveshaft is an electrode. An RF generator is electrically coupled to the driveshaft to deliver RF energy to the electrode at the distal end of the driveshaft to ablate occluding material in the vessel. The electrode may have a variety of tip shapes including concave, roughened, or expandable configurations, depending on the size of the vessel and composition of the occluding material to be ablated.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: October 28, 2003
    Assignee: SciMed Life Systems, Inc.
    Inventors: Chandru V. Chandrasekaran, Zihong Guo, Anthony J. Pantages, Donald Masters, Ryan Kaveckis
  • RF ablation and ultrasound catheter for crossing chronic total occlusions
    Publication number: 20020082503
    Abstract: A combination catheter includes an ultrasound transducer and RF ablation electrode. The ultrasound transducer transmits ultrasound signals into and receives echo signals from a vessel. The echo signals are processed and used to produce an image of the tissue surrounding the catheter. A driveshaft rotates the ultrasound transducer to obtain a 360° view of the vessel wall. At the distal end of the driveshaft is an electrode. An RF generator is electrically coupled to the driveshaft to deliver RF energy to the electrode at the distal end of the driveshaft to ablate occluding material in the vessel. The electrode may have a variety of tip shapes including concave, roughened, or expandable configurations, depending on the size of the vessel and composition of the occluding material to be ablated. Alternatively, the RF ablation energy may be delivered to a guidewire that is used to route the ultrasound catheter through a patient's vasculature.
    Type: Application
    Filed: February 8, 2002
    Publication date: June 27, 2002
    Applicant: SCIMED Life Systems, Inc.
    Inventors: Chandru V. Chandrasekaran, Zihong Guo, Anthony J. Pantages, Donald Masters, Ryan Kaveckis
  • RF ablation and ultrasound catheter for crossing chronic total occlusions
    Patent number: 6394956
    Abstract: A combination catheter includes an ultrasound transducer and RF ablation electrode. The ultrasound transducer transmits ultrasound signals into and receives echo signals from a vessel. The echo signals are processed and used to produce an image of the tissue surrounding the catheter. A driveshaft rotates the ultrasound transducer to obtain a 360° view of the vessel wall. At the distal end of the driveshaft is an electrode. An RF generator is electrically coupled to the driveshaft to deliver RF energy to the electrode at the distal end of the driveshaft to ablate occluding material in the vessel. The electrode may have a variety of tip shapes including concave, roughened, or expandable configurations, depending on the size of the vessel and composition of the occluding material to be ablated. Alternatively, the RF ablation energy may be delivered to a guidewire that is used to route the ultrasound catheter through a patient's vasculature.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: May 28, 2002
    Assignee: Scimed Life Systems, Inc.
    Inventors: Chandru V. Chandrasekaran, Zihong Guo, Anthony J. Pantages, Donald Masters, Ryan Kaveckis