Patent · US Expired

Frequency-controlled heart pacemaker

US4763655A · kind A · utility

67Cited by

7References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Alexander Wirtzfeld · Arnstorf, DE
Karl Stangl · Munich, DE
Roland Heinze · Munich, DE

Key dates

Filing date	Jun 16, 1987
Grant date	Aug 16, 1988
Priority date	—
Expiry date	Jun 16, 2007

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61N1/36557
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The stimulation frequency of a heart pacemaker is controlled dependent on a signal representative of the blood oxygen content of the patient. The blood oxygen dependent signal is generated by a blood oxygen sensor. A temperature sensor generates a separate signal dependent on blood temperature. The blood oxygen and blood temperature signals are combined such that the blood oxygen signal is lowered, i.e., the value thereof is reduced, in ranges of higher physical load indicated by an increase in the temperature dependent signal. The combined signal is used to control the stimulation frequency of a heart pacemaker so that the stimulation frequency is increased, if blood oxygen saturation is decreasing and/or blood temperature is increasing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.