System and method for distinguishing between hypoglycemia and hyperglycemia using an implantable medical device
US7524287B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Mar 8, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/39622
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Techniques are described for detecting and distinguishing among ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. In one technique, these conditions are detected and distinguished based on an analysis of: the interval between the QRS complex and the peak of a T-wave (QTmax), the interval between the QRS complex and the end of a T-wave (QTend), alone or in combination with a change in ST segment elevation. By exploiting QTmax and QTend in combination with ST segment elevation, changes in ST segment elevation caused by hypo/hyperglycemia can be properly distinguished from changes caused by cardiac ischemia. In another technique, hyperglycemia and hypoglycemia are predicted, detected and/or distinguished from one another based on an analysis of the amplitudes of P-waves, QRS-complexes and T-waves within the IEGM. Appropriate warning signals are delivered and therapy is automatically adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.