http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1076583-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b4116e3af92cf221612a2521f92b3e87 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61M5-14244 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61M5-16854 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61N1-36521 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61N1-3706 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61M5-142 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61N1-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61N1-37 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61N1-365 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61M5-168 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61M5-142 |
| filingDate | 1999-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_803139300d33cdd372d511b3af5868a6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ca4b7251b2e1742610c1fd6dfc10564 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76730f74e69083959ba6e56e481c3bbe |
| publicationDate | 2001-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1076583-A1 |
| titleOfInvention | Implantable cardiac stimulator with electrode-tissue interface characterization |
| abstract | A cardiac stimulator capable of measuring pacing impedance includes a tank capacitor for delivering charge to the heart via device leads, a shunt resistor, and high-impedance buffers for measuring pacing current through the shunt resistor. Soon after the leading edge of the stimulation pulse, the voltage across the shunt resistor, as sampled by a high-impendance buffer, indicates lead and cardiac tissue resistance. Just prior to opening the pacing switch to terminate the stimulation pulse, the voltage across the shunt resistor is sampled by a high-impedance buffer and held once against to allow the capacitance of the lead/heart tissue to be calculated. In alternative embodiments, a high-impedance buffer measures the voltage between the tank capacitor and ground immediately following the stimulation pulse to allow estimation of the lead/heart tissue capacitance. In one alternative embodiment, a look-up table is created in main memory and searched to find the closest lead/heart tissue capacitance estimate to any arbitrary degree of accuracy. In another alternative embodiment, the lead/heart tissue capacitance is estimated by successive approximation to any arbitrary degree of accuracy. When the lead/heart tissue capacitance and lead resistance have been determined, a plurality of parameters of importance for analyzing and optimizing a cardiac stimulation system may be calculated, such as the instantaneous current, the average current, the charge, and the energy delivered to the cardiac tissue. |
| priorityDate | 1998-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.