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F
REEDOM
S
PINAL
C
ORD
S
TIMULATOR
L
EAD
I
NSTRUCTIONS FOR
U
SE
M
ODEL
N
UMBERS
: FRT4-A001, FRE4-A001
E
XPLANATION OF
S
YMBOLS ON
P
RODUCT OR
P
ACKAGE
Device reference identification
Consult instructions for use
Use by Do not reuse
Manufacturing date
Manufacturer
Lot number
Do not resterilize
Do not use if package is damaged
Keep out of light, Keep dry
Lead length
Sterilization: ethyleneoxide gas
Caution
Warning
European Authorized
Representative
MR Conditional
Australian Sponsor
Temperature limits
Quantity of product included in package
0344
This symbol means that the device fully complies with
European Directive AIMD
90/385/EEC.
English
Page | 2
T
ABLE OF
C
ONTENTS
EXPLANATION OF SYMBOLS ON PRODUCT OR PACKAGE ...................................................................... 2
DESCRIPTION ........................................................................................................................................ 4
INDICATIONS ........................................................................................................................................ 4
CONTRAINDICATIONS ........................................................................................................................... 5
PRECAUTIONS ...................................................................................................................................... 5
ADVERSE EVENT SUMMARY ................................................................................................................. 5
CLINICAL COMPENDIUM ....................................................................................................................... 6
TRIAL LEAD TO PERMANENT LEAD TRANSITION .................................................................................... 8
PACKAGE CONTENTS ............................................................................................................................ 9
DEVICE SPECIFICATIONS ..................................................................................................................... 10
INSTRUCTIONS FOR USE ..................................................................................................................... 12
P
REPARING FOR SURGERY
............................................................................................................................ 12
P
LACING A LEAD
........................................................................................................................................ 13
T
ESTING
S
TIMULATION
I
NTRAOPERATIVELY
.................................................................................................... 17
A
NCHORING THE
T
RIAL
L
EAD
....................................................................................................................... 19
A
NCHORING THE
P
ERMANENT
L
EAD
.............................................................................................................. 20
L
EAD
E
XPLANT
P
ROCEDURE
......................................................................................................................... 22
MRI INFORMATION ............................................................................................................................ 23
1.5-T
ESLA
/64-MH
Z
MRI C
ONDITIONS
......................................................................................................... 23
3.0-T
ESLA
/128-MH
Z
MRI C
ONDITIONS
....................................................................................................... 24
P
REPARATION FOR THE
MRI
EXAMINATION
.................................................................................................... 24
D
URING THE
MRI
EXAMINATION
.................................................................................................................. 25
P
OST
-MRI
EXAMINATION REVIEW
................................................................................................................ 25
CONTACT INFORMATION .................................................................................................................... 26
Refer to the User Manual for information on how stimulation works, how to use the
Malibu Wearable Antenna Assembly, warnings, and precautions.
English
Page | 3
D
ESCRIPTION
The Freedom Spinal Cord Stimulation System is used for Spinal Cord Stimulation (SCS) to aid in the relief of chronic, intractable pain of the trunk and/or limbs. The therapy utilizes pulsed electrical current to stimulate nerves near the spinal cord in order to inhibit the transmission of pain signals to the brain. The system consists of a neurostimulation lead that is placed in the epidural space of the patient and an external power unit, the Malibu Wearable Antenna
Assembly (WAA) that transmits power wirelessly through the skin to the implanted lead. The implantable lead is a sealed, self-contained system that can include or be mated to a receiver that generates stimulation waveforms to create an electrical volume conduction from the electrode array at the distal end of the lead. The Malibu WAA is the external power unit that is programmable to allow for adjustment of stimulation parameters including the waveform pulse rate, duration, and amplitude.
I
NDICATIONS
The Freedom SCS System is indicated for use as a therapy for:
• Failed Back Surgery Syndrome (FBSS);
• Complex Regional Pain Syndrome (CRPS), Reflex Sympathetic Dystrophy (RSD), or
Causalgia;
• Radicular Pain Syndrome or Radiculopathies;
• Post Laminectomy Pain;
• Multiple Back Surgeries;
• Unsuccessful Disk Surgery or Spinal Decompression Surgery;
• Degenerative Disk Disease (DDD) / herniated disk pain refractory to conservative and surgical interventions;
• Peripheral Causalgia;
• Epidural Fibrosis; and,
• Arachnoiditis or Lumbar Adhesive Arachnoiditis.
English
Page | 4
C
ONTRAINDICATIONS
Patients contraindicated for the Freedom SCS System are those who:
• Are poor surgical risks;
• Are pregnant;
• Are unable to operate the SCS system;
• Are exposed to short-wave diathermy, microwave diathermy or therapeutic ultrasound diathermy; and,
• Are occupationally exposed to high levels of non-ionizing radiation that may interfere with the therapy delivered.
P
RECAUTIONS
The Freedom SCS System could be impacted by operational changes to the Malibu Wearable
Antenna Assembly (WAA) through interference by strong electromagnetic interference (EMI) sources (e.g. diathermy, electrocautery, MRI, radio-frequency ablation, etc.). Should the system ever stop or change performance characteristics as a suspected result of EMI, turn off the system immediately and remove the source of EMI from proximity. Refer to the User
Manual for a detailed list of precautions.
A
DVERSE
E
VENT
S
UMMARY
Implanting a neurostimulation system has risks similar to other spinal procedures. If you are on anticoagulation therapy you might be at greater risk for postoperative complications such as hematomas that could result in paralysis.
In addition to those normally associated with surgery, implantation of a neurostimulation system includes the following risks:
• Allergic or immune system response implanted materials
• Infection;
• Lead erosion through the skin or lead migration;
• Leakage of cerebrospinal fluid;
• Loss of therapy effectiveness;
• Epidural hemorrhage, hematoma, or paralysis;
• Radicular chest wall stimulation;
• Change in stimulation, possibly related to cellular changes around the electrode(s), migration of lead position, electromagnetic interference, or lead fracture.
English
Page | 5
C
LINICAL
C
OMPENDIUM
P
RIMARY
A
UTHOR
T
ITLE
F
EATURE
A
DDRESSED
N
K
EY
R
ESULTS
Allegri, M.
2004
Prospective Study of the Success and Efficacy of Spinal Cord
Stimulation
Pain Reduction,
Quality of Life
170
• After 12 months, patients reported an average of 43% reduction in VAS scores, and
70% of patients reported improved quality of life.
Alo, K.
2002
Alo, K.
2003
Barolat, G.
2001
Bell, G.
1997
Kay, D. 2001
Kim, S. 2001
Four Year Follow-up of Dual
Electrode Spinal Cord
Stimulation for Chronic Pain
Pain Reduction,
Paresthesia
Coverage, Device
Survival
33
• Patients reported an average of
40% reduction in VAS scores and 89% paresthesia coverage.
• Patient satisfaction with the therapy was measured as 63%.
Spinal Cord Stimulation for
Complex Pain: Initial Experience with a Dual Electrode,
Programmable, Internal Pulse
Generator
Paresthesia
Coverage, Patient
Satisfaction,
Adverse Events
20
• Patients reported an average of
77.5% paresthesia coverage.
• Patients reported an average of
55% reduction in VAS scores and a satisfaction rating of 80%.
Epidural Spinal Cord Stimulation with a Multiple Electrode Paddle
Lead Is Effective in Treating
Intractable Low Back Pain
Pain Reduction,
Quality of Life,
Patient Satisfaction
41
• After
12-months, patients reported a 37% reduction in
VAS scores, and 88% were satisfied with the therapy.
Cost-effectiveness analysis of spinal cord stimulation in treatment of failed back surgery syndrome
Cost-Effectiveness NA
• The average patient notices a cost saving, when compared to a typical surgical intervention, at 5.5 years for IPG and 3.9 years for RF.
• Patients who have stellar success notice cost savings within 2.1 years for IPG and 1.4 years for RF.
Spinal Cord Stimulation - A
Long-Term Evaluation in
Patients with Chronic Pain
Spinal Cord Stimulation for
Nonspecific Limb Pain Versus
Neuropathic Pain and
Spontaneous Versus Evoked
Pain
Device Survival,
Adverse Events
Pain Reduction,
Device Survival
70
• Substantial pain relief was reported in 60% of patients.
• Half of the SCS systems were revised within 3 years of implantation.
74
• After 1 year, 83% of patients reported greater than 50% pain relief.
English
Page | 6
P
RIMARY
A
UTHOR
Kumar, K.
1997
Kumar, K.
2003
Leveque, J.
2001
Mironer, Y.
2008
North, R.
2005:56
North, RB.
1991
Oakley, J.
2006
T
ITLE
Epidural spinal cord stimulation for treatment of chronic pain— some predictors of success
F
EATURE
A
DDRESSED
N
K
EY
R
ESULTS
Pain Reduction,
Device Survival,
Adverse Events,
Reduced Drug Use
235
• Patients who reported pain relief also reported improvements in quality of life and a decrease in medication dose.
• After approximately 5.6 years,
47% of patients reported a 50% reduction in pain.
Spinal Cord Stimulation for the
Treatment of Refractory
Unilateral Limb Pain Syndromes
Pain Reduction,
Reduced Drug Use,
Device Satisfaction
75
• After 2 years, 84% of patients reported greater than 50% pain relief, and 56% of patients reported a significant reduction in analgesic use.
• Of patients employed prior to onset of pain, 46% returned to work.
Spinal Cord Stimulation for
Failed Back Surgery Syndrome
Spinal cord stimulation for chronic, intractable pain:
Superiority of “multi-channel” devices
Pain Reduction
Pain Reduction,
Device Survival,
Adverse Event
16
• After 35 months, patient’s reported a mean VAS reduction of 37%.
Efficacy of a Single,
Percutaneous, Across Midline,
Octrode Lead using a "Midline
Anchoring" Technique in the
Treatment of Chronic Low Back and/or Lower Extremity Pain: A
Retrospective Study
Pain Reduction,
Paresthesia
Coverage, Patient
Satisfaction, Device
Survival
54
• Paresthesia coverage was reported as 89% coverage of the lower legs and buttocks area and 71% coverage of lower back coverage.
• Patients reported a 45% reduction in VAS scores.
Spinal Cord Stimulation Versus
Repeated Lumbosacral Spine
Surgery for Chronic Pain: A
Randomized, Controlled Trial
Pain Reduction 50
• Approximately 47% of patients reported that pain relief was reduced by at least 50% and were satisfied with the treatment.
62
• Patients reported a 50% reduction in VAS scores.
• Patient satisfaction was reported at 66%.
Transverse Tripolar Spinal Cord
Stimulation: Results of an
International Multicenter Study
Pain Reduction,
Device Survival,
Paresthesia
Coverage
56
• After 12 months, 53% of patients reported “good” to
“excellent” outcomes.
English
Page | 7
P
RIMARY
A
UTHOR
T
ITLE
Ohnmeiss, D.
2001
Van Buyten,
J. 1999
Patient satisfaction with spinal cord stimulation for predominant complaints of chronic, intractable low back pain
Treatment of Failed Back
Surgery Syndrome Patients with
Low Back and Leg Pain: A Pilot
Study of a New Dual Lead Spinal
Cord Stimulation System
A
F
EATURE
DDRESSED
Pain Reduction,
Quality of Life
Quality of Life
Villavicencio,
A. 2000
Laminectomy Versus
Percutaneous Electrode
Placement for Spinal Cord
Stimulation
Pain Reduction
N
K
EY
R
ESULTS
41
• Approximately 70% of patients reported satisfaction with the therapy, and 60% of the patients indicated that their conditions improved.
20
• Approximately 76% of patients reported a reduction or elimination of analgesic us, and
59% reported an increase in their daily activities.
41
• Approximately 53% of patients with the percutaneous lead experienced good results, while
100% of the patients with laminectomy leads experienced good results.
T
RIAL
L
EAD TO
P
ERMANENT
L
EAD
T
RANSITION
Before a permanent Freedom SCS System is prescribed to a patient, a trial system can be first implanted to evaluate the effectiveness of the therapy for the patient. A trial neurostimulator
(FRT4) can be implanted for such therapy evaluation; results should be reviewed at the end of the trial period to determine if the pain relief was satisfactory for the patient. Considerations before moving to a permanent implant may also include if the patient experiences any adverse events, if the patient has any difficulty operating the Malibu WAA, if the patient had sufficient and comfortable levels of paresthesia coverage and pain relief.
English
Page | 8
P
ACKAGE
C
ONTENTS
§
Lead – A neurostimulator lead for insertion into the epidural space.
§
Guide Wire – A flexible coiled wire used to create a pathway in the epidural space for the lead to follow.
§
Tuohy Needle – A 14-G needle designed for gaining access to epidural space.
§
Introducer Sheath – A 7Fr introducer sheath designed for insertion of the lead into the epidural space. The sheath is transparent to wireless power, and must be used during placement.
§
Stylet(s) – A stiff wire inserted into the lead body to aid in steering and positioning.
§
Sleeve Cap – A pellethane cap that creates a seal around the proximal end of the lead.
Additionally, the cap acts as an anchoring point to secure the lead(s) to connective tissue.
English
Page | 9
D
EVICE
S
PECIFICATIONS
The lead has electrodes on the distal end. The stylet is inserted into the proximal end of the lead to aid in positioning the lead as a steering element. The dimensions for the Freedom 4 trial version, FRT4, or permanent version, FRE4, are detailed in Table 1.
Model Number FRT4 FRE4
Lead Length
Lead Diameter
Electrodes
Number
Shape
Length
Electrode Spacing
Array Length
Connector
Radiopaque Marker
Maximum Recommended
Implant Depth
Implant Period 90 Days
45 cm
1.3 mm
4
Cylindrical
3 mm
4 mm
24 mm
Sleeve Cap
Yes
6 cm
TABLE 1. DEVICE SPECIFICATIONS FOR LEAD(S).
45 cm
1.3 mm
4
Cylindrical
3 mm
4 mm
24 mm
Sleeve Cap
Yes
6 cm
Permanent
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Page | 10
The list of materials in contact with the tissue is detailed in Table 2.
Component Material
Lead
Flexible Circuit Board
Flexible Circuit Trace
Flexible Circuit Encapsulation
Electrodes
Insulation
Lead Tip
Adhesive
Guide Wire
Needle
Introducer Sheath
Stylets (curved, straight)
Handle
Wire
Sleeve Cap
Malibu
Antenna
Belt
Polyimide
Gold
Parylene C
Platinum-Iridium
Polyurethane
Polyurethane
Silicone
Stainless Steel
Stainless Steel
Pebax
Polytetrafluoroethylene
(PTFE)
Stainless Steel
Polyurethane
Copper
Thermoplastic Urethane
TABLE 2. MATERIAL OF LEAD KIT COMPONENTS.
Yes
Yes
No
Yes
No
Yes
Yes
No
No
Yes
Yes
Yes
Material Contacts
Human Tissue
No
No
Yes
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Page | 11
I
NSTRUCTIONS FOR
U
SE
Implanting clinicians should be experienced in procedures that gain access to the epidural space. In addition they should be thoroughly familiar with all product labeling.
P
REPARING FOR SURGERY
Before opening the lead package, verify the package integrity, model number, and use-by date.
In the event that the package is damaged, do not use the product. In the event that the use-by date has expired, do not use the product. Contact Stimwave for further service.
C
AUTION
:
To reduce the risk of lead damage that my result in intermittent stimulation or loss of stimulation, requiring additional surgery to replace the lead:
§
Use only the needle and introducer sheath supplied in the kit.
§
Use a shallow needle-insertion angle (45 degrees or less) when inserting or withdrawing the needle into or out of the epidural space.
§
Do not bend, kink, or stretch the lead or stylet, which may damage the components.
§
Do not use any instrument to handle the lead. The force may compress the lead, resulting in the fracture of internal electronics or inability to insert or withdraw the stylet.
§
Use care when replacing a stylet, excessive pressure on the lead could damage the components, resulting in intermittent or loss of stimulation.
W
ARNING
:
Select a needle entry location that is not more than two vertebral spaces below the target stimulation site.
As with any spinal procedure, the risk of serious injury to the patient (e.g. hemorrhage, hematoma, or paralysis) increases as location of the selected needle insertion site progresses up the vertebral column – from a lower risk at a lumbar location to a higher risk at a cervical location. Select a vertebral location that provides the widest and easiest access to the epidural space during needle insertion to reduce the risk of serious patient injury resulting from direct trauma to the spinal cord.
English
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P
LACING A LEAD
1. If necessary, make an incision at the needle-entry site to the depth of the subcutaneous fascia.
2. Using a paramedian approach lateral to the midline, and under fluoroscopy, insert the introducer sheath and needle assembly into the epidural space at a shallow angle until you encounter resistance from the ligamentum flavum (See Figure 1).
NOTE: Do not use any other needle or introducer sheath other than the ones provided in the lead kit. Do not remove the introducer sheath from the epidural needle when driving
the needle into the epidural space.
FIGURE 1. INSERT THE INTRODUCER SHEATH AND NEEDLE ASSEMBLY INTO THE EPIDURAL SPACE.
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Page | 13
FIGURE 2. INTRODUCER SHEATH AND NEEDLE ASSEMBLY IN EPIDURAL SPACE.
3. Confirm introducer sheath and needle location under fluoroscopy (See Figure 2).
4. After rotating the introducer sheath and needle assembly so that the beveled edge faces cephalad, remove the needle stylet.
5. Advance the introducer sheath and needle assembly to confirm entry into the epidural space (e.g. using the loss-of-resistance technique with air or sterile water).
6. For a second lead, repeat steps 1 – 5 noting these recommendations:
§
Implant the second lead parallel to the first lead and approximately 1 – 3 mm lateral of the physiological midline.
§
Introduce the second lead one vertebral space below the first lead to help prevent nicking or cutting the first lead and to allow sufficient space for suturing both lead and anchors.
§
Stagger the lead tips or place them several vertebral spaces apart, depending on the position that produces the most effective paresthesia.
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C
AUTION
:
Do not use contrast media or saline flush. Contrast media may obscure the field of view and a saline flush may increase the difficulty of lead placement.
7. After inserting the guide wire through the needle, advance the guide wire no farther than 1 -3 cm past the needle tip. Next, remove the guide wire from the needle.
NOTE: If the guide wire track deviates from the intended pathway, steering and manipulating the lead will be more difficult.
8. Next, remove the needle while maintaining the position of the introducer sheath (Figure
3).
NOTE: The metal needle blocks the energy from the Malibu WAA and cannot be used during intraoperative stimulation.
FIGURE 3. INTRODUCER SHEATH REMAINS IN EPIDURAL SPACE WHILE THE NEEDLE IS REMOVED.
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Page | 15
9. Using fluoroscopy, slowly insert the lead through the introducer sheath and advance the lead to the initial target placement site (See Figure 4). A stylet may need to be reinserted. The Introducer Sheath is RF transparent, and can be used throughout intraoperative testing of the lead.
NOTE: When using a curved stylet and resistance is encountered during lead advancement, exchange the curved stylet for the straight stylet and use short, firm movements to advance the lead.
FIGURE 4. PASS THE LEAD THROUGH THE INTERIOR LUMEN OF THE INTRODUCER SHEATH.
10. After verifying the lead position under fluoroscopy (anterior-posterior and lateral views), compare that location with the location that has the highest probability of paresthesia coverage.
NOTE: To increase lead stability, insert enough lead length to extend at least three vertebral bodies into the epidural space. Position the lead so that the center electrodes will be active if lead migration occurs.
English
Page | 16
T
ESTING
S
TIMULATION
I
NTRAOPERATIVELY
NOTE: This procedure requires a Malibu Wearable Antenna Assembly. The Malibu WAA is packaged in a separate kit. Refer to the User Manual for instructions on how to use the Malibu
WAA.
1. While holding the lead in place, disconnect the stylet handle from the lead (proximal end), and completely withdraw the stylet.
2. Place the Malibu Wearable Antenna Assembly in a sterile drape or sterile fluoroscope bag in the region directly above the most proximal implanted electrode (See Figure 5).
C
AUTION
:
To prevent possible uncomfortable or unexpected stimulation (jolting or shocking sensation):
§
Program parameter changes in small increments above the perception threshold
(the amplitude value(s) at which the patient first perceives paresthesia).
§
Decrease the amplitude(s) before: o Changing electrode polarities. o Placing the on the patient’s back. o Turning ON the neurostimulator.
3. Identify the most appropriate stimulation parameters, beginning at a medium pulse width and frequency range.
NOTE: The frequency, pulse width and amplitude are all parameters that collectively make up the stimulation therapy that the patient receives.
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Page | 17
FIGURE 5. INTRAOPERATIVE STIMULATION USING THE MALIBU WEARABLE ANTENNA ASSEMBLY.
4. Increase the amplitude while asking the patient close-ended questions to identify the perception threshold (the amplitude at which the patient first perceives paresthesia), the discomfort threshold (the amplitude at which paresthesia is beyond the patient’s tolerance), and the paresthesia coverage.
NOTE: If good paresthesia coverage is not attained, change electrode settings before repositioning the lead to confirm the direction of lead movement.
5. If two leads were placed, repeat steps 3 – 4 for the second lead; optimize paresthesia coverage using both leads.
6. In the patient’s chart, document the lead position that provided appropriate stimulation coverage (i.e. record the settings and patient responses and include a fluoroscopic image of the final lead position).
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A
NCHORING THE
T
RIAL
L
EAD
1. Tie ‘2-0 non-absorbable suture material (such as silk or some other type of braided polyester mesh) around the body of the device.
2. Tie the device to the skin using the suture material prepped in step 1.
3. Using a pair of sterile scissors cut the excess lead body length away from the implanted portion.
FIGURE 6. SUTURE THE LEAD BODY DIRECTLY TO CONNECTIVE TISSUE. CUT THE EXCESS TUBING OFF.
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Page | 19
A
NCHORING THE
P
ERMANENT
L
EAD
4. Prepare the anchor site by making a 2 to 4 cm longitudinal incision around the introducer sheath shaft, dissecting down to the supraspinous ligament, and establishing hemostasis.
5. While maintaining the lead position, use minimal force to remove the introducer sheath while holding the lead in place by placing light pressure on the proximal end.
C
AUTION
:
Use minimal traction to remove the introducer sheath because quick or sudden removal may dislodge the lead.
6. Using a pair of sterile scissors cut the excess lead body length away from the implanted portion. Maintain at least 5 cm of lead body to allow for proper Sleeve Cap attachment
(See Figure 7).
FIGURE 7. CUT THE EXCESS LEAD BODY LENGTH AWAY WHILE MAINTAINING APPROXIMATELY 5CM FREE.
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Page | 20
7. Slide the Sleeve Cap onto the proximal end of the lead and continue sliding the cap down until it reaches the final position (See Figure 8). Use care to maintain the lead position.
C
AUTION
:
Do not force the Sleeve Cap past the final position. This may damage the components, resulting in an improper seal.
FIGURE 8. SLIDE THE SLEEVE CAP ONTO THE PROXIMAL END OF THE LEAD.
8. Use 2-0 non-absorbable suture to secure the Sleeve Cap to the connective tissue (See
Figure 9).
NOTE: For larger patients where the Sleeve Cap cannot be sutured directly to connective tissue, sutures may be applied directly to the lead body with no risk of damaging the lead electronics.
FIGURE 9. THE SLEEVE CAP READY FOR SUTURES
9. Verify test stimulation parameters to ensure that the lead has not moved by performing intraoperative stimulation. If the lead has moved, reposition it.
10. Close the incision using standard surgical techniques and dressings.
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L
EAD
E
XPLANT
P
ROCEDURE
1. Identify the incision site from the original implantation procedure, and confirm lead location using fluoroscopy.
2. Make an incision to the depth of the proximal end of the lead (also referred to as the
“tail”).
3. If applicable, cut sutures free of any tissue structures or scarring.
4. Remove the lead by slowly pulling on the proximal end.
5. After the lead has been removed, verify that all components are intact and that all implanted materials are accounted for.
6. Close the incision using standard surgical techniques and dressings.
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MRI I
NFORMATION
An MRI examination may be safely performed under certain specific requirements on a patient with the Freedom SCS lead, however, the Malibu Wearable Antenna Assembly (WAA) unit (e.g., the external component of this neuromodulation system) MUST NOT be present in the MR system room at ANY TIME. Failure to adhere to the specific requirements described in this manual can result in tissue damage, severe injury, or death. Please use the contact information found on the last page of this manual for additional questions.
W
ARNING
:
Remove the Malibu WAA from the patient before entering the MR system room. The strong magnetic field of the MR system could attract or otherwise damage the Malibu
WAA and in the process cause serious harm or damage to the MR system.
MRI testing demonstrated the Freedom Spinal Cord Stimulator (SCS) Lead, Model FRE4 and
Model FRT4 are MR Conditional. A patient with each model of the implanted lead can be scanned safely under the following conditions (note, this information applies to cases where a single Freedom Spinal Cord Stimulator (SCS) Lead is implanted, only):
1.5-T
ESLA
/64-MH
Z
MRI C
ONDITIONS
• Use only a cylindrical bore, clinical MRI system with a static magnetic field of 1.5 T and
RF excitation frequency of 64-MHz.
• Enter the correct patient weight into the MR system console to ensure that the whole body averaged SAR is estimated correctly.
• The use of a transmit/receive body RF coil or transmit/receive head RF coil is permitted.
The MRI scan sequences must meet the following requirements. If they do not, the pulse parameters must be adjusted so that they comply with these requirements.
• Use MRI examination pulse sequence parameters that limit the MR system reported specific absorption rate (SAR) to 2.9 W/kg or less for all sequences.
English
Page | 23
3.0-T
ESLA
/128-MH
Z
MRI C
ONDITIONS
• Use only a cylindrical bore, clinical MRI system with a static magnetic field of 3.0 T and
RF excitation frequency of 128-MHz.
• Enter the correct patient weight into the MR system console to ensure that the whole body averaged SAR is estimated correctly.
• The use of a transmit/receive body RF coil or transmit/receive head RF coil is permitted.
The MRI scan sequences must meet the following requirements. If they do not, the pulse parameters must be adjusted so that they comply with these requirements.
• Use MRI examination pulse sequence parameters that limit the MR system reported specific absorption rate (SAR) to 2.9 W/kg or less for all sequences.
NOTE: The conditions provided are based on in-vitro testing and should result in a safe MRI examination of a patient with a single, implanted Freedom Spinal Cord Stimulator (SCS) Lead,
Model FRE4 or Model FRT4 when all instructions are carefully followed.
P
REPARATION FOR THE
MRI
EXAMINATION
The following steps are required prior to performing an MRI examination on a patient who has an implanted Freedom FRT4 or FRE4 component.
1. Allow at least six weeks from the date of implantation to the time of MRI examination.
2. Remove the Malibu Wearable Antenna Assembly (e.g., the external component of this neuromodulation system) from the patients before entering the MR system room.
3. Determine if the patient has any other implants or health conditions that would prohibit or contraindicate an MRI examination. Do not conduct an MRI examination if conditions or implants that would prohibit or contraindicate the MRI procedure are present. If the patient has another implant or device, the safety of performing MRI with the Freedom
SCS lead is unknown.
4. Instruct the patient to immediately inform the MR system operator (i.e., the MRI technologist) if any discomfort, stimulation, shocking, or heating occurs during the examination.
5. The patient must be conscious during the MRI examination in order to be able to inform the MR system operator of any heating, discomfort, or other problems.
6. Verify that all proposed MRI conditions comply with the specific requirements in this manual. If not, the MRI conditions must be modified to meet these requirements. If a particular parameter cannot be modified, do not perform the MRI examination.
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Page | 24
D
URING THE
MRI
EXAMINATION
• The patient should be conscious during the MRI examination. Monitor the patient both visually and audibly. Check the patient between each MR imaging sequence.
Discontinue the MRI examination immediately if the patient is unable to respond to questions or reports any problems.
• Conduct the examination using only the MRI conditions that the MRI radiologist or MRI physicist has confirmed meets the requirements outlined in this manual.
P
OST
-MRI
EXAMINATION REVIEW
• Verify that the patient feels normal.
Verify that the Freedom SCS FRT4 or FRE4 is functional by responding to the Malibu WAA (i.e., lead combined with the external component).
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C
ONTACT
I
NFORMATION
M
ANUFACTURER
Stimwave Technologies, Inc.
901 East Las Olas Boulevard, Suite 201
Fort Lauderdale, FL 33301
United States
Telephone: +1.800.965.5134
Fax: +1.800.965.5134
Internet: www.stimwave.com
05-0031-8 Published May 2015
E
UROPEAN
A
UTHORIZED
R
EPRESENTATIVE
Emergo Europe
Molenstraat 15
2513 BH, The Hague
Netherlands
A
USTRALIAN
S
PONSOR
Emergo Australia
Level 20
Tower II, Darling Park
201 Sussex Street
Sydney, NSW 2000
Australia
0344
2013
English
Page | 26
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Table of contents
- 2 EXPLANATION OF SYMBOLS ON PRODUCT OR PACKAGE
- 4 DESCRIPTION
- 4 INDICATIONS
- 5 CONTRAINDICATIONS
- 5 PRECAUTIONS
- 5 ADVERSE EVENT SUMMARY
- 6 CLINICAL COMPENDIUM
- 8 TRIAL LEAD TO PERMANENT LEAD TRANSITION
- 9 PACKAGE CONTENTS
- 10 DEVICE SPECIFICATIONS
- 12 INSTRUCTIONS FOR USE
- 23 MRI INFORMATION
- 26 CONTACT INFORMATION