One or more feedback elements generate a feedback signal in response to a transmitted signal outputted by each radiator of the antenna system. This feedback signal is received by each radiator, also described as a radiating element, and combined with any leakage signal present at the port of the antenna. Because the feedback signal and the leakage signal are set to the same frequency and are approximately 180 degrees out of phase, this signal summing operation serves to cancel both signals at the output port, thereby improving the port-to-port isolation characteristic of the antenna. Each feedback element can include a photo-etched planar metal strip supported by a planar dielectric card made from printed circuit board material. Such feedback elements can provide a high degree of repeatability and reliability in that the manufacturing of such feedback elements can be precisely controlled.
One or more feedback elements generate a feedback signal in response to a transmitted signal outputted by each radiator of the antenna system. This feedback signal is received by each radiator, also described as a radiating element, and combined with any leakage signal present at the port of the antenna. Because the feedback signal and the leakage signal are set to the same frequency and are approximately 180 degrees out of phase, this signal summing operation serves to cancel both signals at the output port, thereby improving the port-to-port isolation characteristic of the antenna. Each feedback element can include a photo-etched planar metal strip supported by a planar dielectric card made from printed circuit board material. Such feedback elements can provide a high degree of repeatability and reliability in that the manufacturing of such feedback elements can be precisely controlled.
Charge Balanced Cardiac Pacing From High Voltage Circuitry Of An Extra-Cardiovascular Implantable Cardioverter Defibrillator System
- Minneapolis MN, US Paul D. BAKER - Oakdale MN, US Lonny V. CABELKA - San Clemente CA, US Craig W. DORMA - Albertville MN, US Timothy A. EBELING - Circle Pines MN, US Michael W. HEINKS - New Brighton MN, US James VANDER HEYDEN - Maplewood MN, US Joseph IPPOLITO - Minneapolis MN, US Joel R. LAUER - Clearwater MN, US Robert T. SAWCHUK - Roseville MN, US Brian W. SCHOUSEK - Houlton WI, US
International Classification:
A61N 1/39 A61N 1/05 A61N 1/365
Abstract:
An extra-cardiovascular implantable cardioverter defibrillator (ICD) having a high voltage therapy module is configured to control a high voltage charging circuit to charge a capacitor to a pacing voltage amplitude to deliver charge balanced pacing pulses. The capacitor is chargeable to a shock voltage amplitude that is greater than the pacing voltage amplitude. The ICD is configured to enable switching circuitry of the high voltage therapy module to discharge the capacitor to deliver a first pulse having a first polarity and a leading voltage amplitude corresponding to the pacing voltage amplitude for pacing the patient's heart via a pacing electrode vector selected from extra-cardiovascular electrodes. The high voltage therapy module delivers a second pulse after the first pulse. The second pulse has a second polarity opposite the first polarity and balances the electrical charge delivered during the first pulse.
Carrying Case For Controller Of Patients With Vads
- Minneapolis MN, US Lance I. Farb - Miami FL, US Gerald M. Herman - Fridley MN, US Nicholas S. Difranco - New York NY, US Joseph Ippolito - Shoreview MN, US Timothy Hillukka - Rogers MN, US
International Classification:
A61M 60/855
Abstract:
A carrying case for a controller for an implantable blood pump includes a first flexible pouch sized and configured to retain the controller. The pouch has a first face and a second face opposite the first face, the first face includes a thermal insulating material and the second face including a thermal dissipating material.
Notification System For Low-Level Preventative Lvad Alerts
- Miami Lakes FL, US Joseph Ippolito - Shoreview MN, US
International Classification:
G08B 21/24 G08B 7/06 A61M 60/508 A61M 60/17
Abstract:
A controller for an implantable blood pump including processing circuitry in communication with the implantable blood pump and configured to generate at least one preventative alert
Sealed Acoustic Speaker And Medical Device Including Same
- Mounds View MN, US Joseph Ippolito - Shoreview MN, US Matthew Saterbak - Robbinsdale MN, US Luke T. Babler - Minneapolis MN, US Thai Nguyen - Minneapolis MN, US
International Classification:
H04R 1/02
Abstract:
Various embodiments of a speaker and a method of forming such speaker are disclosed. The speaker includes a frame having a first major surface, a second major surface, and an opening disposed between the first and second major surfaces; a cone disposed adjacent the first major surface of the frame; and an adhesive layer disposed on at least a portion of the second major surface of the frame. The adhesive layer occludes the opening of the frame.
Charge Balanced Cardiac Pacing From High Voltage Circuitry Of An Extra-Cardiovascular Implantable Cardioverter Defibrillator System
- Minneapolis MN, US Paul D. BAKER - Oakdale MN, US Lonny V. CABELKA - San Clemente CA, US Craig W. DORMA - Albertville MN, US Timothy A. EBELING - Circle Pines MN, US Michael W. HEINKS - New Brighton MN, US James VANDER HEYDEN - Maplewood MN, US Joseph IPPOLITO - Minneapolis MN, US Joel R. LAUER - Clearwater MN, US Robert W. SAWCHUK - Roseville MN, US Brian W. SCHOUSEK - Houlton WI, US
International Classification:
A61N 1/39 A61N 1/05 A61N 1/365
Abstract:
An extra-cardiovascular implantable cardioverter defibrillator (ICD) having a high voltage therapy module is configured to control a high voltage charging circuit to charge a capacitor to a pacing voltage amplitude to deliver charge balanced pacing pulses. The capacitor is chargeable to a shock voltage amplitude that is greater than the pacing voltage amplitude. The ICD is configured to enable switching circuitry of the high voltage therapy module to discharge the capacitor to deliver a first pulse having a first polarity and a leading voltage amplitude corresponding to the pacing voltage amplitude for pacing the patient's heart via a pacing electrode vector selected from extra-cardiovascular electrodes. The high voltage therapy module delivers a second pulse after the first pulse. The second pulse has a second polarity opposite the first polarity and balances the electrical charge delivered during the first pulse.