If you’re researching InterStim in Phoenix, Arizona, you’re already on the right track. You’ve likely tried medications, pelvic floor therapy, or lifestyle changes—and they haven’t given you the relief you deserve. Sacral neuromodulation (SNM) represents a breakthrough for patients struggling with overactive bladder, urinary retention, and fecal incontinence, and it may be the solution that finally gives you your life back.
But here’s what many patients don’t realize: InterStim isn’t the only sacral neuromodulation option available to you. In fact, newer technology has arrived that addresses many of InterStim’s long-standing limitations. At Bladder Centers of America in Phoenix, we believe you deserve complete, transparent information about every option—so you can make the decision that’s truly best for your body and your life.
What Is Sacral Neuromodulation (SNM)?
Before we discuss specific devices, let’s understand the therapy itself. Sacral neuromodulation—sometimes called sacral nerve stimulation—is a minimally invasive treatment that restores healthy communication between your brain, your bladder, and your bowel.
Here’s the simplest way to think about it: your pelvic organs are controlled by a complex network of nerves that run through the sacral region near the base of your spine. When these nerve signals become disrupted—whether from aging, childbirth, neurological conditions, or other causes—the result can be devastating. Sudden urgency. Embarrassing leaks. Waking up five times a night. Bowel accidents that make you afraid to leave the house.
SNM works by placing a small device under the skin that delivers gentle electrical pulses to the sacral nerves. Think of it like a pacemaker for your bladder. Just as a cardiac pacemaker corrects irregular heart rhythms, a sacral neuromodulator corrects the faulty nerve signals that cause bladder and bowel dysfunction.
Conditions Treated by SNM
Sacral neuromodulation has been FDA-approved to treat three primary conditions:
- Overactive Bladder (OAB) — Including urinary urgency, frequency, and urgency incontinence. If you find yourself rushing to the bathroom dozens of times a day or having accidents before you can get there, SNM can help.
- Urinary Retention — The inability to fully empty your bladder, which can lead to repeated catheterization and increased risk of urinary tract infections.
- Fecal Incontinence — Loss of bowel control that can range from occasional leakage to complete loss of control. This is one of the most undertreated conditions in medicine, and SNM offers real hope.
How the SNM Procedure Works in Phoenix
One of the greatest advantages of sacral neuromodulation is the two-stage evaluation process. Unlike many surgical treatments, you get to “test drive” SNM therapy before committing to a permanent implant.
Stage 1: The Trial Period
During a brief outpatient procedure performed under local anesthesia, a thin, flexible lead (wire) is placed near the sacral nerve through a small incision. This lead connects to an external device that you wear on your waistband for approximately one to two weeks. During this trial period, you track your symptoms in a bladder diary. Most patients notice improvement within the first few days.
If your symptoms improve by 50% or more during the trial—and the majority of patients do experience significant improvement—you’re a candidate for the permanent implant.
Stage 2: Permanent Implantation
The permanent procedure is also minimally invasive and typically takes less than an hour. The implantable pulse generator (IPG)—the small device that delivers the electrical stimulation—is placed beneath the skin in the upper buttock area. It’s connected to the lead that was placed during your trial, and the system is programmed specifically for your needs.
Most patients return to normal activities within a few days. The stimulation is adjustable, and your physician can fine-tune the settings during follow-up visits to optimize your results.
What Is InterStim?
InterStim is the brand name for Medtronic’s sacral neuromodulation system. It was the pioneering device in this space, receiving FDA approval in 1997 for urinary conditions and later for fecal incontinence. For over two decades, InterStim was essentially the only SNM option available, and it helped establish sacral neuromodulation as a legitimate, effective treatment for millions of patients worldwide.
There’s no question that InterStim changed lives. It proved that nerve stimulation could restore bladder and bowel control when nothing else worked. Many physicians—including those of us who have been in this field for years—owe a debt to InterStim for opening the door to this category of treatment.
However, being first doesn’t always mean being best. And as technology has advanced, the limitations of the InterStim system have become increasingly apparent.
InterStim’s Limitations
Patients considering InterStim in Phoenix should be aware of several important factors:
- Battery Life and Replacement Surgery — The InterStim II uses a non-rechargeable battery that typically lasts 5 to 7 years. When the battery depletes, you need another surgical procedure to replace the entire pulse generator. For a 50-year-old patient, that could mean three or four replacement surgeries over a lifetime—each with its own risks, recovery time, and costs.
- Device Size — The InterStim II pulse generator has a volume of approximately 14 cm³, roughly the size of a small stopwatch. While Medtronic has introduced the smaller InterStim Micro (2.8 cm³), the Micro requires recharging—which brings its own challenges.
- MRI Compatibility — Older InterStim devices implanted before late 2019 are not fully MRI-compatible. This is a significant concern, as many patients with bladder and bowel conditions also have other health issues that may require MRI imaging during their lifetime.
- Recharging Challenges (InterStim Micro) — The newer, smaller InterStim Micro does require regular recharging. Some patients—particularly elderly patients or those with dexterity limitations—find the recharging process burdensome.
Why Axonics Is the Better Choice for Phoenix Patients
In 2019, the FDA approved a next-generation sacral neuromodulation system called Axonics. Rather than making incremental improvements, Axonics fundamentally rethought what a sacral neuromodulation device should look like in the 21st century. Here’s why we believe it represents a significant leap forward for patients.
1. A Battery That Lasts 15+ Years
This is the single biggest advantage, and it’s not even close. The Axonics system uses a long-life rechargeable battery that is designed to last approximately 15 years or more. Compare that to the InterStim II’s 5-to-7-year non-rechargeable battery, and the math is straightforward:
- With InterStim II: A patient implanted at age 55 will likely need replacement surgeries at ages 60–62, 65–69, and possibly 72–76. That’s three additional procedures, each requiring anesthesia, incision, recovery, and out-of-pocket expense.
- With Axonics: That same patient may never need a battery replacement at all—or at most, one replacement decades later.
Fewer surgeries means fewer risks, less time off work, less disruption to your life, and significantly lower long-term costs. For many Phoenix patients, this factor alone makes the decision clear.
2. Smaller, More Comfortable Design
The Axonics implant is significantly smaller than the InterStim II—roughly 60% smaller in volume (5.5 cm³ versus 14 cm³). This matters more than you might think. A smaller device means:
- Less noticeable under the skin, especially for thinner patients
- Greater comfort during daily activities, exercise, and sleep
- Reduced risk of discomfort at the implant site
- A less invasive implantation procedure
Many of our Phoenix patients tell us they forget the Axonics device is even there. That’s exactly how a long-term implant should feel.
3. Full-Body MRI Compatibility
The Axonics system is approved for full-body MRI scans at both 1.5T and 3T strengths without requiring the device to be turned off first. This is critically important for long-term health. Consider that over the 15+ year lifespan of your implant, you may need MRI scans for:
- Joint injuries or orthopedic evaluations
- Neurological concerns
- Cancer screening
- Cardiac evaluation
- Spinal conditions
With Axonics, you never have to worry about your bladder control device limiting your access to essential diagnostic imaging. The device doesn’t even need to be switched off for the scan—it just works.
4. Easy, Quick Recharging
The Axonics system recharges wirelessly through the skin using a small external charger. Most patients charge for about 20 minutes once a month—roughly the time it takes to watch a single TV episode. The charger is small enough to slip into a pocket, and many patients charge while reading, watching television, or relaxing.
This minimal recharging commitment is a small trade-off for a battery that lasts three times longer than the non-rechargeable InterStim II.
5. Advanced Programming and Patient Control
The Axonics patient remote is designed for simplicity. Patients can easily adjust their stimulation levels for comfort, switch between pre-set programs, and check their battery status—all with an intuitive interface that doesn’t require a medical degree to operate.
Head-to-Head: Axonics vs. InterStim at a Glance
| Feature | InterStim II | InterStim Micro | Axonics |
|---|---|---|---|
| Battery Life | 5–7 years | ~15 years (rechargeable) | 15+ years (rechargeable) |
| Device Size | 14 cm³ | 2.8 cm³ | 5.5 cm³ |
| Full-Body MRI | Limited (older models) | Yes (1.5T & 3T) | Yes (1.5T & 3T) |
| Recharging | None (non-rechargeable) | Required | ~20 min/month |
| Replacement Surgeries | Every 5–7 years | Rare | Rare (15+ year lifespan) |
| Patient Comfort | Larger profile | Smallest profile | Compact & comfortable |
| FDA Approved | 1997 | 2020 | 2019 |
Real Results: What Phoenix Patients Experience with SNM
The clinical outcomes for sacral neuromodulation are impressive regardless of the device used. Studies consistently show:
- Over 80% of patients who proceed to permanent implant achieve significant, lasting symptom improvement
- Many patients report a 50–90% reduction in daily urgency episodes, leakage, and nighttime bathroom trips
- Patient satisfaction rates exceed 85% at five-year follow-up
- Quality of life improvements are dramatic—patients return to activities they had given up, travel without anxiety, and sleep through the night
At Bladder Centers of America, we’ve seen these results firsthand with our Phoenix patients. The transformation is often emotional—patients who haven’t left their home without mapping every bathroom in a five-mile radius suddenly find themselves traveling, exercising, and socializing without fear.
Who Is a Candidate for SNM in Phoenix?
You may be a strong candidate for sacral neuromodulation if:
- You’ve been diagnosed with overactive bladder, urinary retention, or fecal incontinence
- Conservative treatments (medications, pelvic floor therapy, behavioral modifications) haven’t provided adequate relief
- You want a proven, minimally invasive treatment with a trial period
- You’re looking for a long-term solution rather than ongoing medication management
- Your symptoms are significantly impacting your quality of life
SNM is not appropriate for everyone. Patients with certain anatomical conditions, active infections, or specific neurological disorders may not be candidates. A thorough evaluation with a bladder specialist is essential to determine whether sacral neuromodulation is right for you.
Why Choose Bladder Centers of America for SNM in Phoenix?
When you’re considering a treatment as important as sacral neuromodulation, the experience and expertise of your physician matters enormously. Here’s what sets Bladder Centers of America apart:
- Specialized Expertise — Our practice focuses exclusively on bladder and bowel control conditions. This isn’t a side service we offer—it’s our entire mission.
- Extensive Experience — We’ve performed hundreds of sacral neuromodulation procedures and have deep familiarity with both InterStim and Axonics systems.
- Honest Guidance — We don’t push one device over another based on anything other than what’s best for you. Our recommendation of Axonics is based on clinical evidence, patient outcomes, and the technological advantages we’ve seen in practice.
- Comprehensive Care — From your initial evaluation through your trial period, permanent implant, and long-term follow-up, we walk with you every step of the way.
- Phoenix Location — Conveniently located in Phoenix, Arizona, we serve patients throughout the Valley including Scottsdale, Mesa, Chandler, Tempe, Gilbert, and Glendale.
Frequently Asked Questions About InterStim and SNM in Phoenix
Is the SNM trial painful?
Most patients report minimal discomfort during the trial lead placement, which is performed under local anesthesia. You may feel a slight tingling sensation from the stimulation, which most patients describe as comfortable or barely noticeable. The sensation is adjustable to your comfort level.
Will I feel the implant?
With the Axonics system’s compact size, most patients forget it’s there within a few weeks. Some patients feel a mild awareness of the device initially, but this typically fades as you adjust to the implant.
How long does the procedure take?
The trial lead placement takes approximately 30 minutes. The permanent implant procedure typically takes less than an hour. Both are outpatient procedures, meaning you go home the same day.
Does insurance cover sacral neuromodulation?
Yes—sacral neuromodulation is covered by most major insurance plans, including Medicare. Both InterStim and Axonics are FDA-approved and covered at comparable rates. Our team handles insurance verification and prior authorization so you know your coverage before proceeding.
Can I still exercise and be active with an SNM implant?
Absolutely. After a brief recovery period (usually one to two weeks of avoiding strenuous activity), most patients return to all their normal activities, including exercise, swimming, and sports. The device is designed for an active lifestyle.
What if the trial doesn’t work for me?
If you don’t experience at least 50% improvement during the trial period, the lead is simply removed in a quick office procedure. There’s no permanent implant, no long-term commitment, and no significant risk. This is one of the greatest advantages of SNM—you know it works before you commit.
Take the Next Step: Schedule Your SNM Consultation in Phoenix
If you’ve been searching for InterStim in Phoenix, Arizona, you owe it to yourself to learn about all your sacral neuromodulation options. The technology has advanced significantly, and today’s patients have access to smaller, longer-lasting, more MRI-friendly devices than ever before.
At Bladder Centers of America, we’re committed to helping you find the treatment that gives you your freedom back. Whether you’re dealing with overactive bladder, urinary retention, or fecal incontinence, sacral neuromodulation may be the answer you’ve been searching for—and Axonics represents the most advanced version of that therapy available today.
Don’t let bladder or bowel problems control your life for one more day. Contact Bladder Centers of America today to schedule your consultation and find out if sacral neuromodulation is right for you.
📞 Call us today or request an appointment online to take the first step toward freedom from bladder and bowel dysfunction.