http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1313900-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_69bddb4c84704857f70d926c31a6e1a2 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61N1-365 |
| filingDate | 1987-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1993-02-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3ecd7fc3b6cdf9fbe69caf8251c7e3bd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9be4c6e274e215fcf6a0f1a3e238f873 |
| publicationDate | 1993-02-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1313900-C |
| titleOfInvention | Therapeutic treatment dependent upon heart stroke volume measurement |
| abstract | BIOMEDICAL APPARATUS RESPONSIVE TO CHANGES IN STROKE VOLUME Abstract of the Disclosures A biomedical apparatus capable of sensing changes in the heart's ventricular volume or stroke volume and then changing the operating performance of the device in a fashion as a function of stroke volume. A relatively low frequency signal (under 5 KHz) is applied between spaced electrodes disposed in the heart and the beating action of the heart serves to modulate this signal due to changes in impedance being sensed between these or other electrodes within the heart. The modulated carrier signal is then processed to remove R-wave and other electrical artifacts and then demodulated to remove the carrier frequency component leaving the envelope which is proportional to instantaneous ventricular volume. This envelope signal then contains stroke volume and ventricular volumes information which can be used by the biomedical apparatus to vary its operating parameters. For example, a current proportional to changes in stroke volume may be injected into the timing circuit of a demand-type cardiac pacer pulse generator whereby the interpulse interval of the pulses generator is varied as a function of stroke volume. |
| priorityDate | 1987-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.