Implantable heart pump
US4547911A · kind A · utility
Inventor
Key dates
| Filing date | Dec 2, 1983 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Dec 2, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3303
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A mechanical heart for implantation into the human body is run at a higher frequency which is a harmonic multiple of a normal heart beat frequency, and the pump chamber volume is reduced, proportionately to the increased pumping frequency. The circuit for controlling the frequency includes a phase locked loop for implementing a predictive algorithm which adjusts the frequency dynamically based on heart muscle nerve ending signals to synchronize the circuit output to the biologically determined heart beat. The reduced displacement permits use of a smaller compliance chamber. A novel interconnection between the motor chambers of a plurality of such pumps eliminates the need for venting and compliance chambers in a totally implanted heart system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.