Medtronic 37601 Handbuch Seite 17

< 250 ohms indicates a possible short circuit for bipolar impedance.
Caution: If a possible short or open circuit is detected, do not rely solely on the
results of impedance testing for troubleshooting. Accuracy of the data generated
during impedance tests can fluctuate based on the neurostimulator that is being
tested and on the programmed therapy settings.
5. If the DBS system is functioning properly and no open or short circuits are detected,
check the box.
6. If both boxes in step 1 are checked, continue to step 2 of the worksheet.
7. If an open or short circuit is verified, the system is compromised. If the system is
compromised, MRI scan type eligibility cannot be determined, and the safety of an
MRI scan cannot be evaluated.
Warning: An MRI procedure should not be performed on a patient with a
Medtronic DBS System that has a broken conductor wire (in the lead, extension,
or pocket adaptor) because higher than normal heating may occur at the break
or the lead electrodes, which can cause thermal lesions. These lesions may
result in coma, paralysis, or death.
Notes:
▪
If a programmer cannot communicate with the device or if the device has
reached its end of service, then MRI scan eligibility cannot be determined.
▪
If you cannot resolve an impedance issue or if you are unsure of system integrity
after testing connections, contact Medtronic Technical Services.
8. If shown on the software app, record the information code on the report, which can
be used to troubleshoot scan eligibility by Medtronic.
Step 2: Is the MRI scan limited to only a head scan?
This step is used to rule out the factors preventing a patient from having an MRI scan
using full-body eligible settings.
1. Is the implanted neurostimulator model listed in this section of the worksheet? If so,
check the box.
Note: If the model is not listed, only head scan-type eligibility may apply, or the
model may be in a different MRI Guidelines manual.
2. Does the patient record, programmer, or x-rays indicate that the patient has pocket
adaptors? If there are no pocket adaptors, check the box. See "Appendix A: X-ray
images to assist in identifying a pocket adaptor" on page 34 to assist in identifying
a pocket adaptor.
Warning: Confirm if any pocket adaptors are implanted with the
neurostimulation system and, if present, record that a pocket adaptor is
implanted on the MRI eligibility sheet. Failure to identify the presence of a
pocket adaptor may result in exposure to MRI parameters not approved for the
DBS system, which can induce significant heating. Excessive heating can result
in serious and permanent injury including coma, paralysis, or death.
2020-01-01 MRI guidelines for Medtronic deep brain stimulation systems 37601 37602 37603 English 17
37612 B35200