RFID detection and identification system for implantable medical devices
First Claim
Patent Images
1. An RFID detection and identification system, comprising:
- a) an implantable medical device (IMD) having a hermetically sealed housing for preventing entry of body fluids into the IMD;
b) an RFID tag disposed within the IMD housing; and
c) a radio frequency (RF) transmissive window or wall of the IMD housing adjacent to the RFID tag, wherein the window or wall is of alumina, and at least a portion of the alumina is contacted by an electromagnetic shield so that the shielded portion of the window or wall is penetratable by low frequency (LF) signals ranging from 125 kHz to 150 kHz to thereby facilitate radio frequency (RF) communication between the RFID tag and an RF interrogator through the window or wall.
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Abstract
An RFID tag is disposed within a hermetically sealed housing of an IMD. Low frequency RFID interrogators and tags are used, and the housing walls are made of materials, and/or are reduced in thickness, to facilitate RF communication between the RFID tag and an RFID reader/interrogator programmer. An RFID reader/interrogator may be used which has a limited transmit time and time-out period to avoid interference with the operation of the IMD.
206 Citations
17 Claims
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1. An RFID detection and identification system, comprising:
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a) an implantable medical device (IMD) having a hermetically sealed housing for preventing entry of body fluids into the IMD; b) an RFID tag disposed within the IMD housing; and c) a radio frequency (RF) transmissive window or wall of the IMD housing adjacent to the RFID tag, wherein the window or wall is of alumina, and at least a portion of the alumina is contacted by an electromagnetic shield so that the shielded portion of the window or wall is penetratable by low frequency (LF) signals ranging from 125 kHz to 150 kHz to thereby facilitate radio frequency (RF) communication between the RFID tag and an RF interrogator through the window or wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14)
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12. An RFID detection and identification system, comprising:
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a) an implantable medical device (IMD) having a hermetically sealed housing for preventing entry of body fluids into the IMD; b) an RFID tag disposed within the IMD housing; and c) a radio frequency (RF) transmissive window or wall of the IMD housing adjacent to the RFID tag, wherein the window or wall is of an alumina ceramic having an electromagnetic shield of either copper or gold adjacent to at least a portion thereof, and d) wherein the ceramic window or wall provided with the electromagnetic shield is penetratable by low frequency (LF) signals to thereby provide for radio frequency (RF) communication between the RFID tag and an RF interrogator through the window or wall. - View Dependent Claims (13)
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15. A housing for an implantable medical device (IMD), the housing comprising:
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a) a window or wall of the housing being of alumina, b) wherein at least a portion of the window or wall is contacted by an electromagnetic shield so that the shielded portion of the window or wall is penetratable by low frequency (LF) signals ranging from 125 kHz to 150 kHz. - View Dependent Claims (16, 17)
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Specification