Electromagnetic interference immune tissue invasive system

Abstract

An electromagnetic immune tissue invasive system includes a primary device housing. The primary device housing having a control circuit therein. A shielding is formed around the primary device housing to shield the primary device housing and any circuits therein from electromagnetic interference. A lead system transmits and receives signals between the primary device housing. The lead system is either a fiber optic system or an electrically shielded electrical lead system.

1 . A method of operating a magnetic resonance imaging unit for preventing failure of a tissue implantable device of a patient undergoing magnetic resonance imaging, comprising: 
 (a) monitoring, by the magnetic resonance imaging unit, operations of the tissue implantable device of the patient undergoing magnetic resonance imaging;    (b) determining, by the magnetic resonance imaging unit, from the monitored operations, a quiet period for a tissue implantable device; and    (c) generating, by the magnetic resonance imaging unit, a magnetic resonance imaging pulse during a quiet period of the tissue implantable device.    
     
     
         2 . The method as claimed in  claim 1 , wherein the implantable tissue device is a cardiac assist device.  
     
     
         3 . A method of operating a tissue implantable device for preventing failure of a tissue implantable device of a patient undergoing magnetic resonance imaging within the magnetic resonance imaging unit, comprising: 
 (a) monitoring, by the tissue implantable device, operations of the magnetic resonance imaging unit;    (b) detecting, by the tissue implantable device, a phase timing of an external magnetic resonance imaging pulse field; and    (c) altering, by the tissue implantable device, operations of the tissue implantable device to avoid interfering with the detected external magnetic resonance imaging pulse field.    
     
     
         4 . The method as claimed in  claim 3 , wherein the implantable tissue device is a cardiac assist device.