What If PNS Doesn't Work?

Not every PNS patient achieves the relief they hoped for. This happens, and it's important to understand what it means for your options going forward.

Because PNS uses a trial period before any permanent implantation, you have direct evidence of your response before making a longer-term commitment. If the trial doesn't provide meaningful relief, leads are removed and nothing has changed about your joint or your future options.

The 60-day trial is the safety net built into the PNS process. It exists specifically because not everyone responds the same way. If at the end of the trial period the pain reduction isn't meaningful, that's a clear signal — and the appropriate next step is to remove the leads and discuss what comes next.

No bridges are burned. No anatomical changes have been made. You're exactly where you were before the trial, with better information about what works for your specific pain profile.

Several factors influence response. Patients with severe structural joint damage may not get sufficient relief from nerve modulation because the pain source is mechanical rather than primarily neural. Patients with centralized pain — where the nervous system itself has become sensitized — may respond differently than those with localized joint pain.

Lead placement, stimulation parameters, and the specific nerves targeted also affect outcomes. Experienced physicians will adjust these variables during the trial, but some patients simply don't respond adequately to peripheral nerve modulation regardless of optimization.

If PNS doesn't provide sufficient relief, joint replacement remains on the table — exactly as it was before. You haven't lost any options. For many patients, going through the PNS process also provides valuable diagnostic information: it confirms whether pain is primarily neural or structural, which helps guide the next decision.

Other options depending on your specific situation may include radiofrequency ablation (RFA) targeting different nerves, spinal cord stimulation for more widespread pain, or surgical consultation if structural damage warrants it.

The worst-case outcome of PNS is a trial that doesn't work, temporary insertion site soreness, and a return to baseline. The worst-case outcome of proceeding directly to joint replacement without trying PNS is a surgery with a difficult recovery, complications, or persistent post-surgical pain — a common experience affecting a meaningful percentage of replacement patients.

The risk asymmetry is the core argument for trying PNS before replacement when the clinical profile supports it. The downside of trying and failing PNS is low. The downside of skipping it and having an unnecessary surgery is significant.