QT interval monitoring system with alarms and trending

US9538933B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Eric Helfenbein · Sunnyvale, US
• Sophia Huai Zhou · Briarcliff Manor, US
• James E. Lindauer · San Francisco, US
• Richard E. Gregg · Greenhills, US
• Scott Kresge · West Newbury, US
• Bernd Wilm · Raubling, DE
• Kathryn A Egan · Derry, US
• Nancy Mutch · Amesbury, US
• Saeed Babaeizadeh · Arlington, US
• Francis P Michaud · Hudson, US

Key dates

• Filing date: Sep 5, 2008
• Grant date: Jan 10, 2017
• Expiry date: Nov 23, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B5/364
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An ECG monitoring system continuously monitors a patient's ECG waveform and periodically identifies the patient's QT interval. QT interval values are averaged over time and a corrected interval value QTc and a change in QTc relative to a baseline, dQTc, are periodically produced. An alarm is responsive to updated QT interval values and issues an alarm whenever a selected QT value exceeds an alarm limit. The periodically produced QT interval values are stored and a trend display may be produced showing changes in the QT interval information over different periods of time. The trend display may selectively display the trend information either graphically or in tabular form.