Spinal Cord Stimulation (SCS) Therapy

Who Is SCS Right For?

Three Patterns of Candidacy

Let's look at each of the three situations in more detail.

1. When the Cause of Pain Is Unclear or Not Surgically Treatable

SCS may be considered as an alternative to surgery in these situations:

Situation Details
Conservative treatment has not helped 6+ months of medications, injections, or physical therapy without improvement
Surgical target is unclear Imaging shows changes, but they may not explain your symptoms
Multi-level degeneration Changes at multiple levels make it difficult to determine what to operate on
Nerve pain is the main problem Pain and numbness are dominant, with little structural instability
Chronic pain (6+ months) Moderate to severe pain that persists day after day

2. When Surgery Is Possible, but Would Require Major Fusion

Even when a treatable condition exists, the scale of the surgery and the patient's overall health may make SCS the better choice:

Situation Details
Multi-level fusion needed Two or more levels require fusion — a significant operation
High surgical risk Advanced age, multiple health conditions, or anesthesia concerns
Adjacent segment disease risk Long fusions increase the risk of problems at neighboring levels in the future
Reversibility matters Major fusion cannot be undone; SCS can be removed if needed

A note on considering SCS before surgery:

Traditionally, SCS was mainly used for pain that persisted after surgery. In recent years, however, there is growing recognition that when multi-level fusion would be needed or when surgical risk is high, SCS should be considered before proceeding to major surgery. This approach is supported by clinical experience and the latest evidence.

That said, treatment recommendations can vary between physicians and institutions. Please discuss your specific situation thoroughly with your doctor.

3. When Pain Persists After Surgery

Situation Details
Post-surgical pain Surgery improved the structure, but nerve pain continues
Multiple prior surgeries Further reoperation is unlikely to help
Adjacent segment disease New problems have developed above or below the surgical site

Surgery vs. SCS — It's Not "Either/Or"

"If surgery can fix it, do surgery; if not, try SCS" — it's not that simple.

In practice, the decision depends on what kind of surgery would be needed and the patient's overall condition.

A Treatment Framework Based on the Condition

Condition Recommended Treatment Notes
Decompression alone can help Decompression surgery Even with some instability, decompression is preferred
Single-level fusion needed Fusion surgery After discussing risks of adjacent segment disease
Two-level fusion needed SCS discussed alongside surgery For older patients or those with other health issues, SCS may be preferred
Three or more levels need fusion SCS preferred Except in cases of severe spinal deformity, the risks of multi-level fusion often outweigh the benefits

Key points:

  • SCS is not a "last resort"
  • The more levels that would need fusion, the earlier SCS should be considered
  • Decompression for patients who need decompression, single-level fusion when appropriate — SCS is a "third option" before committing to multi-level fusion

When Surgical Risk Is High

Even when the surgical target is clear, SCS may be the better choice if:

  • Advanced age makes general anesthesia or major surgery risky
  • Multiple health conditions (diabetes, heart disease, lung disease, etc.)
  • Blood-thinning medications cannot be safely stopped
  • Multiple prior surgeries make reoperation high-risk

In these situations, trying SCS first — a lower-risk, reversible approach — can safely improve pain before considering more invasive options.

When SCS Is Not Appropriate

Surgery is preferred over SCS when:

  • Decompression alone can help (a clear, single-level compression that surgery can address)
  • Structural instability is progressing (worsening slippage that requires stabilization)
  • Severe spinal deformity is present (corrective surgery is needed)

SCS itself may not be suitable if:

  • There is an active infection
  • There is a bleeding disorder or blood-thinning medication that cannot be managed
  • Pain is primarily related to psychological factors
  • Another implanted device (such as a pacemaker) may conflict — this requires careful evaluation

How Your Doctor Makes the Decision

Your doctor considers three key questions:

1. Can the cause of this pain be fixed with surgery? 2. If so, how extensive would the surgery need to be? 3. Can the patient safely undergo that surgery?

The answers to these questions guide the recommendation:

Can surgery help? Scale of surgery Patient's condition Recommendation
Yes Decompression only — Decompression surgery
Yes Single-level fusion Can tolerate surgery Fusion surgery
Yes Two-level fusion Good health Fusion (with SCS also discussed)
Yes Two-level fusion Older / other conditions SCS preferred
Yes Three+ levels — SCS preferred
No — — SCS considered

Timing Matters: "Not Too Early, Not Too Late"

When SCS is considered is also important:

Timing Situation Recommendation
Too early Less than 3–6 months of conservative treatment Continue conservative treatment
Just right 6 months to 2 years of chronic pain Optimal window for SCS
Too late Several years of intractable pain Effectiveness may be reduced

Early consideration often leads to better outcomes.