公开(公告)号：EP1354137A2

公开(公告)日：2003-10-22

申请号：EP02750864.7

申请日：2002-04-26

申请人： Berlin Heart AG

发明人： NÜSSER, Peter ,  MÜLLER, Johannes ,  DEUS, Frank ,  GÖTTEL, Peter ,  HOFFMANN, Jan ,  GRAICHEN, Kurt ,  ARNDT, Andreas ,  MERKEL, Tobias

IPC分类号： F04D13/06

CPC分类号： F04D13/0606 ,  A61M1/1005 ,  A61M1/1086 ,  A61M1/122 ,  F04D3/00 ,  F04D15/0066

摘要： The invention relates to a method for controlling an assist pump for fluid delivery systems with pulsatile pressure. If, for example, a heart-assist pump is operated with a constant rotational speed, the blood is continually delivered through the assist pump even when the cardiac chamber is in the decontraction phase. The inventive method ensures that an assist pump functions in an assisting manner only during the pressure phase of the main pump by constantly determining the pressure difference between the inlet and delivery side of the assist pump and by constantly determining the rate of flow through the assist pump. The rotational speed of the assist pump is controlled as to prevent the determined pressure difference from falling below a predeterminable value and to prevent the rate of flow from falling below zero.

公开(公告)号：EP1386081B1

公开(公告)日：2006-08-23

申请号：EP02724301.3

申请日：2002-04-29

申请人： Berlin Heart AG

发明人： HOFFMANN, Jan ,  ARNDT, Andreas ,  MERKEL, Tobias

IPC分类号： F04D29/04 ,  H02K7/09

CPC分类号： F04D29/041 ,  F04D3/00 ,  F04D13/0606 ,  F04D29/048 ,  F16C32/0457 ,  F16C32/047 ,  F16C32/0478 ,  F16C2316/18 ,  F16C2360/44 ,  H02K5/128 ,  H02K7/09 ,  H02K7/14

摘要： Since disruptive forces can be continuously exerted upon a rotor during a pulsatile flow through a pump with a magnetically mounted rotor (permanent magnets and addition control current coils), it is necessary to adjust position i.e modify axial rotor position very quickly. The control current should only result in small amounts of losses. According to the invention, the current is pulse-width modulated by the control current coils by means of a set value predetermined by a controller which is arranged downstream from a position sensing system. If the set value is high, it is switched to a higher voltage level and the real value of the position sensing system is stored for a defined period of time, respectively beginning with the switching flank of the control current, and the position sensing system is disconnected during said period of time.

公开(公告)号：EP1386081A1

公开(公告)日：2004-02-04

申请号：EP02724301.3

申请日：2002-04-29

申请人： Berlin Heart AG

发明人： HOFFMANN, Jan ,  ARNDT, Andreas ,  MERKEL, Tobias

IPC分类号： F04D29/04 ,  H02K7/09

CPC分类号： F04D29/041 ,  F04D3/00 ,  F04D13/0606 ,  F04D29/048 ,  F16C32/0457 ,  F16C32/047 ,  F16C32/0478 ,  F16C2316/18 ,  F16C2360/44 ,  H02K5/128 ,  H02K7/09 ,  H02K7/14

摘要： Since disruptive forces can be continuously exerted upon a rotor during a pulsatile flow through a pump with a magnetically mounted rotor (permanent magnets and addition control current coils), it is necessary to adjust position i.e modify axial rotor position very quickly. The control current should only result in small amounts of losses. According to the invention, the current is pulse-width modulated by the control current coils by means of a set value predetermined by a controller which is arranged downstream from a position sensing system. If the set value is high, it is switched to a higher voltage level and the real value of the position sensing system is stored for a defined period of time, respectively beginning with the switching flank of the control current, and the position sensing system is disconnected during said period of time.

公开(公告)号：EP1354137B1

公开(公告)日：2007-06-13

申请号：EP02750864.7

申请日：2002-04-26

申请人： Berlin Heart AG

发明人： NÜSSER, Peter ,  MÜLLER, Johannes ,  DEUS, Frank ,  GÖTTEL, Peter ,  HOFFMANN, Jan ,  GRAICHEN, Kurt ,  ARNDT, Andreas ,  MERKEL, Tobias

IPC分类号： F04D13/06

CPC分类号： F04D13/0606 ,  A61M1/1005 ,  A61M1/1086 ,  A61M1/122 ,  F04D3/00 ,  F04D15/0066

摘要： The invention relates to a method for controlling an assist pump for fluid delivery systems with pulsatile pressure. If, for example, a heart-assist pump is operated with a constant rotational speed, the blood is continually delivered through the assist pump even when the cardiac chamber is in the decontraction phase. The inventive method ensures that an assist pump functions in an assisting manner only during the pressure phase of the main pump by constantly determining the pressure difference between the inlet and delivery side of the assist pump and by constantly determining the rate of flow through the assist pump. The rotational speed of the assist pump is controlled as to prevent the determined pressure difference from falling below a predeterminable value and to prevent the rate of flow from falling below zero.