"Have You Heard of Spinal Cord Stimulation (SCS)?"

If pain persists despite treatment, there is a newer option worth knowing about.

Last week, we explored pain clinics and the multidisciplinary team approach. This week, we'll look at an option for those who haven't found enough relief from conventional treatments: Spinal Cord Stimulation (SCS).

What Is SCS (Spinal Cord Stimulation)?

The Basic Idea

SCS is a treatment that places a thin electrode near the spinal cord and delivers gentle electrical impulses to reduce pain.

Here's a simple way to think about it:

Imagine the electrical signals "closing a gate" before the pain message reaches your brain.

This is based on a scientific concept called the "Gate Control Theory" of pain transmission.

How It Works in Practice

  1. The electrode (lead): A thin wire, just slightly thicker than a strand of hair, placed in the epidural space near the spinal cord
  2. The generator (IPG): A small device similar to a cardiac pacemaker, implanted under the skin of the buttock or abdomen
  3. The remote control: You can adjust the stimulation intensity yourself

The gentle electrical current from the electrode stimulates the spinal cord and reduces the pain signals traveling to the brain.

Who Is It For?

SCS is not for every type of pain. It's most appropriate for people who meet specific criteria.

Main Indications

  • Pain persists after spinal surgery (FBSS/PSPS)
  • Conservative treatments (medication, injections, rehabilitation) haven't provided sufficient relief
  • Additional surgery isn't indicated, or you prefer not to have another operation
  • The source of pain is nerve-related

Where SCS Works Best

Effective Less Likely to Help
Leg pain and numbness Pure back pain alone
Post-surgical neuropathic pain Structural bone or joint pain
CRPS (Complex Regional Pain Syndrome) Pain primarily driven by psychological factors
Pain from peripheral vascular disease Acute pain

The Biggest Advantage of SCS: You Can "Try Before You Commit"

The most remarkable feature of SCS is its trial system.

How the Trial Works

  1. Electrode placement (under local anesthesia, about 30 minutes to 1 hour)

    • Only the electrode is placed in the epidural space
    • It's connected to an external device, and stimulation begins

  2. The evaluation period (approximately one week)

    • You stay in the hospital and go about near-normal activities while assessing the effect
    • You record how much your pain improves
    • The stimulation settings are fine-tuned to find the best pattern for you

  3. The decision

    • If it works (pain reduced by 50% or more) --> proceed to permanent implantation
    • If it doesn't work --> the electrode is removed. Nothing remains in your body

"Try it, and if it doesn't work, it can be reversed" — that's what makes SCS so reassuring.

Permanent Implantation

If the trial confirms that SCS is effective for you, permanent implantation follows.

  • General anesthesia (or local anesthesia)
  • The electrode is permanently secured, and the generator (IPG) is implanted under the skin
  • Surgery time: 1 to 2 hours
  • Hospital stay: approximately one week

How Effective Is SCS?

Research Data

  • SCS for FBSS patients: approximately 60-70% of patients experience a 50% or greater reduction in pain
  • The proportion of patients achieving significant pain relief is higher with SCS than with repeat surgery (confirmed in multiple comparative studies)
  • Many patients are also able to reduce their medication use

Impact on Daily Life

Beyond pain reduction:

  • Improved walking distance
  • Better sleep quality (no more waking up in pain)
  • Increased activity levels
  • Lower medication doses (and fewer side effects)
  • Improved overall quality of life

How SCS Has Evolved

SCS technology has advanced dramatically in recent years.

Traditional SCS

  • Produced a tingling sensation (paresthesia) in the stimulated area
  • Worked by "replacing pain with a tingling feeling"
  • The sensation could change depending on body position

Modern SCS

Technology Key Feature
High-frequency stimulation (HF10) Reduces pain without any tingling sensation. 10,000 Hz
Burst stimulation Mimics natural nerve firing patterns. More effective pain relief
DTM (Differential Target Multiplexed) Sends multiple stimulation patterns simultaneously — the latest technology
Closed-loop systems Automatically detects your body's response and adjusts stimulation in real time

These newer technologies provide treatment that is more effective, produces less noticeable stimulation, and works regardless of body position compared to traditional SCS.

MRI Compatibility

Most modern SCS devices are MRI-compatible. You can still undergo MRI examinations after implantation (with certain conditions).

Frequently Asked Questions

Q: Will the pain go away completely?

A: Complete elimination of pain is uncommon, but a 50-70% reduction is achieved in many patients. As many patients tell me: "When the pain is cut in half, life feels completely different."

Q: Does the device run constantly?

A: Stimulation generally runs 24 hours a day, but you can turn it on and off or adjust the intensity yourself with the remote control. Some patients turn it off temporarily during bathing, for example.

Q: How long does the battery last?

A: The latest rechargeable models can last over 10 years. Non-rechargeable models require a battery replacement (a minor surgery to swap the generator) every 3 to 5 years.

Q: Can I fly on an airplane?

A: Yes, air travel is perfectly fine. At airport security, simply show the security staff your SCS identification card.

Q: Can I play sports?

A: Most sports are fine. However, intense twisting movements or contact sports may carry a risk of displacing the electrode, so some caution is advised.

Q: How much does it cost?

A: SCS is covered by health insurance in many countries. In Japan, it falls under the High-Cost Medical Expense Benefit system, which caps your monthly out-of-pocket costs based on income (see Week 10). In other countries, check with your insurer about coverage for neuromodulation therapies.

SCS Is Not a "Last Resort"

There was a time when SCS was seen as "the thing you try when everything else has failed." That thinking has changed.

  • Introducing SCS earlier, before pain becomes deeply chronic, tends to produce better outcomes
  • In some cases, choosing SCS over repeated surgeries leads to better results
  • SCS is not a "last resort" — it's one of several options to consider at the right time

Want to Learn More About SCS?

The website hosting this column series — scs-for-lcs.com — has more detailed information about SCS.

  • How SCS works and the different types
  • The treatment journey from consultation to implantation
  • Patient stories
  • Frequently asked questions

If you're curious, please take a look.

And if you'd like to discuss whether SCS might be appropriate for you, speak with your surgeon or pain specialist.

Summary

  • SCS: A treatment that sends gentle electrical impulses near the spinal cord to relieve pain
  • Who it's for: Persistent pain after surgery, cases where conservative treatment hasn't worked
  • Biggest advantage: A trial lets you test the effect before committing to permanent implantation. If it doesn't work, it's fully reversible
  • Effectiveness: 60-70% of patients achieve a 50% or greater reduction in pain
  • Evolution: High-frequency, burst, and closed-loop technologies continue to improve outcomes
  • Insurance coverage: Covered by health insurance in Japan and many other countries
  • Not a "last resort" — an option to consider at the right time