Apparatus for receiving telemetry signals from active implantable medical devices
First Claim
1. Apparatus for the reception of a signal emitted by an active implanted medical device (26) comprising a means for collecting a signal (10) having magnetic induction field lines for the reception of magnetic induction comprising a useful component (Bs) emitted by the implanted device and a parasitic component (Bp) of external origin, characterized in that the signal collectors means comprises at least one collecting coil (12) wound on a first portion (14) of a magnetic circuit and at least one compensation coil (22) wound on a second portion (20) of said magnetic circuit, the first and second portions of the magnetic circuit comprising a common magnetic element (16) and being configured in a manner such that, when the signal collection means is disposed proximate to the implanted device, the collecting coil is crossed once by the magnetic induction field line of the useful component (Bs) and the compensation coil is crossed twice, in opposite directions, by said same magnetic induction field lines.
2 Assignments
0 Petitions
Accused Products
Abstract
A device for the reception of signals emitted by an active implanted medical device. The device has a signal collector coil for the reception of a magnetic induction which receives a useful signal component (Bs) emitted by the implanted device (26) and a parasitic signal component (Bp) of external origin. There is at least one collecting coil (12) wound on a first portion (14) of a magnetic circuit and at least one compensation coil (22) wound on a second portion (20) of the magnetic circuit, the two portions of the magnetic circuit belonging to a common magnetic element (16) and being configured in a manner such that, when the device is disposed in face of the implanted device, the collecting coil is essentially crossed one time by the magnetic induction field lines of the useful signal component (Bs) and the compensation coil is crossed essentially twice, in opposite direction, by the same magnetic induction field lines, thereby allowing to discriminate the useful signal component for improved signal to noise ratios and high speed data transmission.
183 Citations
13 Claims
- 1. Apparatus for the reception of a signal emitted by an active implanted medical device (26) comprising a means for collecting a signal (10) having magnetic induction field lines for the reception of magnetic induction comprising a useful component (Bs) emitted by the implanted device and a parasitic component (Bp) of external origin, characterized in that the signal collectors means comprises at least one collecting coil (12) wound on a first portion (14) of a magnetic circuit and at least one compensation coil (22) wound on a second portion (20) of said magnetic circuit, the first and second portions of the magnetic circuit comprising a common magnetic element (16) and being configured in a manner such that, when the signal collection means is disposed proximate to the implanted device, the collecting coil is crossed once by the magnetic induction field line of the useful component (Bs) and the compensation coil is crossed twice, in opposite directions, by said same magnetic induction field lines.
-
9. A signal collecting system of a programmer for telemetry communications with an active implantable medical device, comprising
a magnetic circuit having first portion, a second portion and a third portion, the third portion connecting the first and second portions; -
a signal collecting coil wound on the first portion; and a first compensating coil wound on the second portion; wherein the first portion is separated from the second portion by a distance, the distance being dimensioned according to the active implantable medical device so that any magnetic flux field lines emanating from the implanted medical device cross the signal collecting coil one time and cross the first compensating coil twice in opposite directions. - View Dependent Claims (10, 11, 12, 13)
-
Specification