Method and apparatus for controlling the hemodynamic state of a patient based on systolic time interval measurements detecting using doppler ultrasound techniques
US5139020A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Mar 8, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36571
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hemodynamic control apparatus and method for regulating blood flow within the cardiovascular system in a closed-loop control system using ultrasound measurement techniques and intracardiac electrogram sensing to determine a hemodynamic status of the patient and to derive a control parameter for modulating the hemodynamics of the system using electrical or pharmaceutical therapy. This apparatus and method provides for the monitoring of heart contractility and blood flow volume in the circulatory system to control an implantable cardiac assist or therapy device to maintain the hemodynamic status of the patient without invading the left heart or the arterial system of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.