RFID detection and identification system including an RFID reader having a limited transmit time and a time-out period to protect a medical device against RFID-associated electromagnetic interference
First Claim
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1. An interrogator for an implantable pulse generator system, the interrogator comprising:
- a) a time-out circuit and an actuatable RF signal generator for transmitting an electromagnetic signal,b) wherein upon first actuation of the RF signal generator, regardless whether an RFID tag is detected, or not, the RF signal generator transmits a first electromagnetic signal having a first limited total continuous transmit time that is no longer than about two heart beats, followed by an interim period of a defined length where the time-out circuit renders the interrogator incapable of transmitting the electromagnetic signal, followed by the RF signal generator transmitting a second electromagnetic signal having a second limited total continuous transmit time that is no longer than about two heart beats,c) wherein no matter how frequently the RF signal generator is actuated, the time-out circuit prevents the first, second and subsequent transmissions of the electromagnetic signal that are each no longer than about two heart beats after a prior electromagnetic signal has been transmitted from the RF signal generator until the interim period has expired.
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Abstract
A system is provided for identifying implanted medical devices, leads and systems, as well as objects in close proximity to a patient having an implanted active medical device, using a radio frequency identification (RFID) tag having retrievable information relating to the AIMD, lead system and/or patient. An RFID tag communicator includes a circuit for limiting the total continuous transmit time of an interrogation signal, and a time-out circuit for delaying a second and any subsequent interrogation of the RFID tag.
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Citations
59 Claims
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1. An interrogator for an implantable pulse generator system, the interrogator comprising:
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a) a time-out circuit and an actuatable RF signal generator for transmitting an electromagnetic signal, b) wherein upon first actuation of the RF signal generator, regardless whether an RFID tag is detected, or not, the RF signal generator transmits a first electromagnetic signal having a first limited total continuous transmit time that is no longer than about two heart beats, followed by an interim period of a defined length where the time-out circuit renders the interrogator incapable of transmitting the electromagnetic signal, followed by the RF signal generator transmitting a second electromagnetic signal having a second limited total continuous transmit time that is no longer than about two heart beats, c) wherein no matter how frequently the RF signal generator is actuated, the time-out circuit prevents the first, second and subsequent transmissions of the electromagnetic signal that are each no longer than about two heart beats after a prior electromagnetic signal has been transmitted from the RF signal generator until the interim period has expired. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An implantable pulse generator system, the system comprising:
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a) the pulse generator comprising a housing containing a power source electrically connected to control circuitry for generating a pulse of electrical current and delivering the electrical pulse to a lead attachable to the pulse generator for stimulating body tissue contacted by an electrode of the lead; b) a radio frequency identification (RFID) tag housed inside the pulse generator housing; c) an interrogator comprising a time-out circuit for delaying a subsequent transmission of the electromagnetic signal and an actuatable RF signal generator for transmitting an electromagnetic signal, d) wherein upon first actuation of the RF signal generator, regardless whether an RFID tag is detected, or not, the RF signal generator transmits a first electromagnetic signal having a first limited total continuous transmit time that is no longer than about two heart beats, followed by an interim period of a defined length where the time-out circuit renders the interrogator incapable of transmitting the electromagnetic signal, followed by the RF signal generator transmitting a second electromagnetic signal having a second limited total continuous transmit time that is no longer than about two heart beats, e) wherein no matter how frequently the RF signal generator is actuated, the time-out circuit prevents the first, second and subsequent transmissions of the electromagnetic signal that are each no longer than about two heart beats after a prior electromagnetic signal has been transmitted from the RF signal generator until the interim period has expired. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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Specification