Pacer with combined defibrillator tailored for bradycardia patients

US7386344B2 · kind B2 · utility

Assignee

• Cardiac Pacemakers, Inc. · US

Inventors

• Joseph M. Bocek · Seattle, US
• Richard Milon Dujmovic, Jr. · Coon Rapids, US
• Phil Foshee · Woodinville, US
• Harley White · Redmond, US
• Jaeho Kim · Redmond, US
• Anthony Harrington · Woodinville, US
• Richard S. Sanders · Stillwater, US
• Douglas R. Daum · Oakdale, US
• Paul E. de Coriolis · Bellevue, US
• Joseph M. Smith · North Oaks, US
• Richard Fogoros · New Castle, US

Key dates

• Filing date: Aug 18, 2004
• Grant date: Jun 10, 2008
• Expiry date: Aug 31, 2025

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/39622
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A combination pacer/defibrillator is tailored for bradycardia patients. In one example, its shock-delivery specificity exceeds its sensitivity to shockable ventricular tachyarrhythmias. In another example, its specificity exceeds 95%, or 99%, or even 99.5%. Sensitivity is programmed to a high desired sensitivity value, but only if it can be done without decreasing the specificity below the desired specificity threshold value. This can be conceptualized as “avoiding at all costs” delivering false shocks, even at the expense of failing to deliver a shock to a treatable ventricular tachyarrhythmia. Specificity enhancements include, among other things, inhibiting shock delivery when the patient is breathing or not supine, using multiple channels or a high rate VT/VF detection threshold. The present pacer/defibrillator device could potentially save the lives of bradyarrhythmia patients who are not presently clinically indicated for a defibrillator/pacer, but who have an increased risk of sudden cardiac death due to one or more risk factors.