Medtronic 9466 Technical Manual

9466 Tachy Patient Magnet

Description and intended use

The Model 9466 Patient Magnet is a bluecoated, ring-shaped
magnet. It is used with certain Medtronic Implantable Cardioverter
Defibrillators (ICDs) that provide a programmable Patient Alert™
monitoring feature.

If any Patient Alert condition (low battery voltage, lead impedance
out of range, etc.) that is programmed On has occurred, these
ICDs emit an audible Patient Alert™ tone. By placing the magnet
over the ICD, the clinician or the patient can replay the Patient
Alert™ tone.

The Patient Alert condition does not need to be present at the time
of the replay. The tone indicates whether a programmed condition
has occurred since the last device interrogation.

Warnings

The ICD suspends its tachyarrhythmia detection and therapy
operations while the magnet is in place. Removing the magnet
restores the ICD to its programmed operation. The magnet does
not affect the ICD’s bradycardia pacing operations.

To ensure tachyarrhythmia therapy if necessary, the patient should
not carry, store, or leave the magnet positioned over the ICD.

The patient should be careful to avoid sources of electromagnetic
interference (EMI) while applying the magnet.

Directions for use

The Model 9466 Patient Magnet can be used whenever a Patient
Alert™ tone has been announced. The patient should call the
follow-up clinician and use the magnet to replay the tone over the
telephone.

1. Call the follow-up clinician, using a conventional (not cellular)
telephone.

2. Hold the face of the magnet directly over the ICD (Figure 1).

Figure 1. 9466 Magnet Application

3. After about a second, the ICD sounds one of three tones.

If more than one Patient Alert™ condition has occurred since
the last interrogation, the highest urgency tone is sounded.

Continuous tone No programmed Patient Aler t™

Intermittent on/off tone A Low-Urgency condition has occurred

Dual high/low tone A High-Urgency condition has occurred

4. Move the magnet away from the ICD once the tone begins to
sound.

5. The audible tone continues for at least two seconds
(maximum of 30 seconds). The magnet can be applied again
to retrigger the tone if necessary.

6. If a Patient Alert™ condition has occurred, the audible tone
sounds automatically each day at the programmed time until
the ICD is interrogated with a Medtronic programmer. At the
time of interrogation, the clinician can retrieve a detailed
report of the alert condition.

7. Refer to the applicable ICD technical manual for additional
information.

condition has occurred

Storage and handling

■

The magnet could damage some electronic devices if kept
too close.

■

Keep the magnet at least 15 cm (six inches) from electronic
devices and recordings: VCRs, televisions, and videotapes;
bank and credit cards, cordless and cellular telephones,
computers, diskettes, calculators, etc.

■

Keep the magnet at least 5 cm (two inches) from watches
and clocks.

■

If soiled, the magnet can be wiped clean with a soft cloth or a
sponge, or washed with a non-abrasive cleanser. The magnet
is not damaged by being submerged in water.

Technical specifications

Shape Ring

Size Approx. 75 mm (3") diameter x 16 mm

Materials Ferrous alloys coated with epoxy

Minimum field strength 90 gauss measured 40 mm (1.5") from

(5/8") thick

magnet surface

Technical support

Medtronic employs highly trained representatives and engineers
located throughout the world to serve you and, upon request, to
provide training to qualified hospital personnel in the use of
Medtronic products. In addition, Medtronic maintains a
professional staff of consultants to provide technical consultation
to product users. For more information, contact your local
Medtronic representative.

DISCLAIMER OF WARRANTY

ALTHOUGH THE MODEL 9466 PATIENT MAGNET
HEREAFTER REFERRED TO AS “PRODUCT” HAS BEEN
MANUFACTURED UNDER CAREFULLY CONTROLLED
CONDITIONS, MEDTRONIC HAS NO CONTROL OVER THE
CONDITIONS UNDER WHICH THIS PRODUCT IS USED.
MEDTRONIC, THEREFORE DISCLAIMS ALL WARRANTIES,
BOTH EXPRESS AND IMPLIED, WITH RESPECT TO THE
PRODUCT, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. MEDTRONIC SHALL NOT BE LIABLE
TO ANY PERSON OR ENTITY FOR ANY MEDICAL EXPENSES
OR ANY DIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES CAUSED BY ANY USE, DEFECT, FAILURE OR
MALFUNCTION OF THE PRODUCT, WHETHER A CLAIM FOR
SUCH DAMAGES IS BASED UPON WARRANTY, CONTRACT,
TORT OR OTHERWISE. NO PERSON HAS ANY AUTHORITY
TO BIND MEDTRONIC TO ANY REPRESENTATION OR
WARRANTY WITH RESPECT TO THE PRODUCT.

The exclusions and limitations set out above are not intended to,
and should not be construed so as to, contravene mandatory
provisions of applicable law. If any part or term of this Disclaimer
of Warranty is held to be illegal, unenforceable or in conflict with
applicable law by a court of competent jurisdiction, the validity of
the remaining portions of this Disclaimer of Warranty shall not be
affected, and all rights and obligations shall be construed and
enforced as if this Disclaimer of Warranty did not contain the
particular part or term held to be invalid.

World Headquarters

Medtronic, Inc.
710 Medtronic Parkway
Minneapolis, MN 55432-5604
USA
Internet: www.medtronic.com
Tel. [phone]
Fax [phone]

Caution: Federal Law (USA)
restricts this device to sale by or on
the order of a physician (or properly
licensed practitioner).

Medtronic USA, Inc.

Toll-free in the USA (24-hour
technical consultation for physicians
and medical professionals)
Bradycardia: 1-800-505-4636
Tachycardia: 1-800-723-4636
Heart Failure: 1-800-505-4636

© Medtronic, Inc. 2004
197773001C
2005-01-28

*197773001*