BLOOD PUMP FOR ISCHEMIA DETECTION AND TREATMENT

摘要

A blood pump incorporating a rotary pump such as a rotary impeller pump implantable in fluid communication with a ventricle and an artery to assist blood flow from the ventricle to the artery. The device may include a pump drive circuit supplying power to the pump, one or more sensors for sensing one or more electrophysiological signals such as subcutaneous, pre-cordial ECG signals and a signal processing circuit connected to the sensors and to the pump drive circuit. The signal processing circuit is operative to detect the sensor signals and control power supplied to the pump from the pump drive circuit so that the pump may run in a normal sinus rhythm mode, with a varying speed synchronized with the cardiac cycle. When an ischemic or myocardial infarction condition is detected, the pump drive circuit may also run the pump in an ischemia or myocardial infarction mode different from the normal sinus rhythm mode.

主权项

1. A blood pump, comprising:
a rotary pump configured to be implantable in a subject and in fluid communication with a ventricle and an artery of the subject to assist blood flow from the ventricle to the artery; at least one pump drive circuit for applying power to the pump, controlling the speed of the pump or both; at least one sensor for sensing one or more electrogram (ECG) signals in the subject; a signal processing circuit in communication with the sensors and the at least one pump drive circuit, the signal processing circuit being operative to (i) receive subcutaneous ECG signals, (ii) determine the presence or absence of a reduction in cardiac blood flow or an ischemic condition or myocardial infarction condition based on subcutaneous pre-cordial electrode signals, and (iii) control the power supplied to the pump from the at least one pump drive circuit so as to control the speed of the pump and operate the pump in a normal sinus rhythm mode in the absence of an ischemic condition or myocardial infarction condition, and (iv) to operate the pump in at least one modified mode of operation in the presence of an ischemic condition or myocardial infarction condition.