Implantable medical device with multi-vector sensing electrodes

• US 6,699,200 B2
• Filed: 03/01/2001
• Issued: 03/02/2004
• Est. Priority Date: 03/01/2000
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Lee, Brian B., Cao, Jian, Hurd, Spencer R.
• Primary Examiner(s): Denion, Thomas
• Assistant Examiner(s): Robinson, Daniel
• Application Number:
  US09/797,031
• Publication Number:
  US 20010034487A1
• Time in Patent Office: 1,097 Days
• Field of Search: 600/508, 600/506, 600/510, 600/511, 600/512, 600/513, 600/514, 600/515, 600/516, 600/517, 600/518, 600/519, 600/520, 600/521, 600/522, 600/523, 600/524, 600/525, 600/526, 600/527, 600/528, 128/897, 128/898, 128/899
• US Class Current: 600/508
• CPC Class Codes: A61B 5/076 Permanent implantations telemetry using implanted circuitry A61B5/0031; implanted stimulators for therapy A61N1/3605, A61N1/362, A61N1/372
• CPC Class Codes: A61B 5/287 Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS]
• CPC Class Codes: A61B 5/341 Vectorcardiography [VCG]

Abstract

A medical device for multi-vector sensing of cardiac depolarization signals is disclosed. Specialized algorithm is implemented to enhance multi-vector electrode sensing. Further a geometric shape is optimized to enable space-volume efficiencies for deployment and navigation of the medical device for implant in a patient.

Claims

1. An implantable medical device (IMD) including a plurality of sensing electrodes configured for multi-vector sensing forming an insertable loop recorder (ILR) in combination, the IMD comprising:

a geometric body having a thickness smaller than its width and wherein said width is smaller than a length defined along a center-line axis, the body including a bend, a first wing extending from a first side of the bend and a second wing extending from a second side of the bend; and

a plurality of electrodes coupled to said geometric body such that a first electrode of the plurality is positioned on the first wing, a second electrode of the plurality is positioned on the second wing and a third electrode of the plurality is positioned proximate to the bend;

wherein a line extending from the first electrode to the third electrode forms an angle with a line extending from the second electrode to the third electrode, the angle being between and including 45 degrees and 100 degrees; and

whereby said electrodes form multi-vector relations and said geometric body is adapted for ease of subcutaneous insertion in a patient'"'"'s body and for positional stability within the patient'"'"'s body to thereby sense physiological signals via said electrodes.

2. The IMD of claim 1 wherein the wings form substantially curvilinear edges.

3. The IMD of claim 1 wherein said multi-vector relations include a rule-based software program implemented to select from said multi-vector relations at least one vector relation.

4. The IMD of claim 1, wherein the bend is located in proximity to a mid-point of the center-line axis of the body.

5. The IMD of claim 1, wherein the first electrode and the second electrode are positioned on a first side of the center-line axis and the third electrode is positioned on a second side of the center-line axis.

6. The IMD of claim 1, wherein the body further includes a side spanning the width of the body and at least one of the plurality of electrodes is positioned on the side.

7. The IMD of claim 1, wherein the body further includes a side spanning the thickness of the body and at least one of the plurality of electrodes is positioned on the side.

8. The IMD of claim 1, wherein one or both of the first wing and the second wing includes at least one suture hole.

9. The IMD of claim 1, wherein the plurality of electrodes includes only three electrodes.