Non-invasive diagnostics for ventricle assist device
US9056159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2013 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Oct 2, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3365
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A circulatory assist system has a pump with a motor coupled to rotate the pump at a selectable speed. A controller drives the motor at a target speed and collects blood flow measurements during operation of the pump. An impaired flow condition is identified when a plurality of successive blood flow measurements are between an expected minimum flow and a low flow threshold, such that the low flow would necessitate issuing an alert. During the impaired flow condition, it is detected whether an inflow obstruction exists by determining whether a reduction in speed of the pump is correlated with a predetermined increase in the blood flow measurements. If the inflow obstruction is detected, then the speed of the pump is further reduced to further increase the blood flow measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.