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Telemetry C Tech Brief - BC_Scenarios
Appendix_Tel_BC DRAFT
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1.0 PURPOSE
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2.0 DESCRIPTION
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This section describes the operation of the Telemetry B/C systems as they coexist together in a
product.
In the Telemetry B/C usage model implant supports both telemetry systems (Telemetry B and
Telemetry C). The Telemetry B is the prim ary system used for initiating communication before
switching over to Telemetry C.
A Programmer selects the telemetry system to use for bi-directional communication with the
implant. Once the telemetry system is selected for communication then programmer transmits an
open session request in the selected telemetry system.
The activation mechanism is as fo llows:
• Both telemetry systems ar e acti vated when a magnet prese nce is detect ed. Tel emetry B star t to
beacon, while Telemetry C listens to establish bidirectional communication. The programmer
does the Auto-id in Telemetry B, based on the uplink re sponse. It selects the telemetry system
for bidirectional communication and transmits an open session downlink in the selected
telemetry system. Upon receipt of a valid open session downlink, the implant disables the
“other” telemetry s ystem (C in this example), and bi directional co mmunication sessi on is established.
Note: An implant with dual telemetry system will have a new sub-model id.
MEDTRONIC CONFIDENTIAL Appendix.doc
Telemetry B/C Operations
modified 07/01/02 2:22 pm
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Telemetry C Tech Brief - BC_Scenarios
Appendix_Tel_BC DRAFT
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2.1 SYSTEM DESCRIPTION/REQUIREMENTS:
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2.1.1 SESSION ESTABLISHMENT:
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MEDTRONIC CONFIDENTIAL Appendix.doc
A presence of magnet or a re ceipt of a val id devi ce ID down link ac tivat es both te le metry sy stems.
The Telemetry B system to beacon and Telemetry C system to listen. The two user models for
establishing a session with Telemetry B/C are as follows:
1) Desktop Application:
The user can invoke an Auto-id from the desktop application software on the programmer. When
an Auto-Id button is pressed - t riggering the programmer to begin it s search for t he implant - as part
of this search prog rammer tr ansmit s devi ce id req uests . The devi ce id uplin k respo nse contai ns th e
implant’s unique sub-model i d, based on the upl ink res ponse and if the 2090 progr ammer supp orts
Telemetry C the device applica ti on so ft wa re will sel ec t ei ther the Telemetry B or C applicatio n to
open a communication session with a selected implant.
2) Application software is selected prior to opening a session:
If the application software which supports Telemetry C is already selected then user must swipe a
magnet over the implant to activate the implant’s listen mode. The programmer will search for
T elemetry C implant(s ) with a specific mo del. A button press on the programmer will iss ue a device
id request if one or more implant device(s) are found a user action will be required to select the
appropriate implant after which an open request downlink request will be transmitted to establish
the bi-directional communication session.
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Appendix_Tel_BC DRAFT
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2.1.2 HOLTER MONITOR:
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2.1.2.1 TELEMETRY B/C HOLTER MONITOR OPERATIONS:
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MEDTRONIC CONFIDENTIAL Appendix.doc
The Telemetry C specific holter monitor would be ideal to use with the Telemetry C system. The
design of this unit is yet to be started and its development may not be completed for the first
Telemetry C implant product. Meanwhile Telemetry B holter monitor could be used with the
Telemetry B/C system. Their are two unique environments for the holter usage:
Clinical environment: - where it is desireable to capture data usi ng the holter monitor while in a
programming session with a prog rammer . In thi s environment implant coul d be in s ession with the
programmer while simultaneously transmitting data to the holter monitor unit. This allows for the
analysis of the holter data at a later time.
Non-Clinica l environment: - in this environment implant is not required to maintain a communication session with the programmer while simultaneously transmitting data to the holter monitor.
T ypically the implant is programmed to transmit the holter data for a period of time typically 24 to
48 hours and patient is given the holter monitor unit to record data for a period of time. Once the
holter recording time expires either the patient sends the holter data to the clinic or patient comes
to the clinic - during this holter data capture a programmer session is not open.
The Telemetry B/C system is being designed to use Telemetry B holter monitor while using
Telemetry C for a programmer-implant communica tion session.
Telemetry B Holter Monitor usage with Telemetry C system:
During a Telemetry C communciation session between a programmer-implant - When a clinican
programs the holter mode in the implant for a period of time (24 to 48 hours) - the implant will not
uplink any holter data using the Telemetry B system till the Telemetry C implant-programmer
communicaiton session is closed.
Re-establis hing a Communication Session while H olter Mode is active:
While implant’s Holter mode is active (transmitting data using Telemetry B) - a communication
session could be reestablished either via Telemetry B or Telemetry C by selecting the appropriate
application software . If the communication session is reestablished via Telemetry C then upon the
receipt of an open request downlink implant will suspend the holter data uplink. The holter data
uplink will remain suspended for the duration of the programmer-implant session. Once the
programmer-implant session is closed then the holter data uplink will resume via Telemetry B.
NOTE: If for some “un known” reason - programmer i s u nabl e to re-establish the c ommunication
session using Telemetry C - user will have the ability to select the Telemetry B Application from
the Model Select to establish the communication session using Telemetry B.
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