Title:
SUCTION DETECTION IN AN AXIAL BLOOD PUMP USING BEMF DATA
Document Type and Number:
WIPO Patent Application WO/2014/197558
Kind Code:
A3
Abstract:
The presence or absence of a suction condition in an implantable blood pump (101, 1001) is determined at least in part based on a parameter related to flow, such as a parameter related to thrust on the rotor (120, 1020) of the pump. A local extreme of the parameter representing the minimum flow during ventricular diastole in an earlier interval is used to establish a threshold value. A value of the parameter representing the minimum flow during ventricular diastole in a later interval is compared to this threshold. If the comparison indicates a substantial decline in the minimum flow between the earlier and later intervals is associated with a suction condition. During the absence of a suction condition, the threshold is continually updated, so that the system (100, 1000) does not indicate presence of a suction condition if the flow decreases gradually.
Inventors:
CASAS FERNANDO (US)
REYES CARLOS (US)
WOLMAN JUSTIN (US)
REYES CARLOS (US)
WOLMAN JUSTIN (US)
Application Number:
PCT/US2014/040847
Publication Date:
July 02, 2015
Filing Date:
June 04, 2014
Export Citation:
Assignee:
HEARTWARE INC (US)
International Classes:
A61M60/178; A61M60/237; A61M60/422; A61M60/538; A61M60/816
Foreign References:
| US20120245681A1 | 2012-09-27 | |||
| US20040215050A1 | 2004-10-28 | |||
| US6066086A | 2000-05-23 | |||
| US20030069465A1 | 2003-04-10 | |||
| US20130046129A1 | 2013-02-21 | |||
| US20060229488A1 | 2006-10-12 | |||
| US20070282298A1 | 2007-12-06 |
Attorney, Agent or Firm:
MILANO, Mario et al. (David Littenberg, Krumholz & Mentlik, LLP,600 South Avenue Wes, Westfield NJ, US)
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