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Clinical studies
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Gilmore 2025: 4-Year Follow Up After 60-day PNS in Low Back Pain
Summary
Long-term follow-up survey for prior study shows outcomes in back pain 4 years after 60-day PNS
Majority of respondents reported sustained relief of back pain an average of 4.7 years after PNS
70% avoided progression to more costly, invasive, and/or destructive low back pain interventions
Gutierrez 2025: 60-Day PNS of the Occipital Nerves for Headache
Summary
Primary endpoint from a prospective study (n=20) shows headache relief after 60-day PNS
85% of participants at end of treatment had at least 50% reductions in pain and/or pain interference
Ongoing follow-up indicates that relief is sustained in a majority of participants
Goree 2024: RCT of 60-Day PNS for Post-surgical TKA Pain
Summary
Multicenter RCT: 52 patients (41 in primary endpoint), 60-day PNS vs. sham for post-TKA pain.
Significant Primary Endpoint (≥50% pain relief at EOT): PNS, 60%,vs. Sham, 24% (p=0.028).
Significant improvements in function (walking distance), WOMAC, and PGIC QoL with PNS at EOT.
Real-world data
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Vorenkamp 2025: Shoulder Pain Follow-up Survey after 60-Day PNS
Summary
A majority of responders to 60-day PNS reported sustained shoulder pain relief in a follow-up survey
Through up to 5 years, over 80% avoided advancing to additional interventions for shoulder pain
A majority of patients interested in deferring shoulder surgery successfully did so after 60-day PNS
Valimahomed 2024: RWE of PNS for Chronic Shoulder Pain
Summary
Retrospective Real World Evidence (RWE) analysis of 768 patients with chronic shoulder pain.
Common PNS lead targets included the suprascapular and/or axillary nerves.
Improvements in multiple health domains (e.g., quality of life, physicial function, sleep) at EOT.
Gutierrez 2024: Chart Review of PNS for Chronic Shoulder Pain
Summary
Anonymized medical records were reviewed of patients who received SPRINT PNS for shoulder pain.
Over 80% of patients reported a substantial (≥50%) reduction in shoulder pain with SPRINT at EOT.
Bimodal stimulation produced the greatest percent pain relief.
Reviews & other publications
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Pritzlaff 2024: Review of Studies on PNS for Chronic Pain
Summary
Ten studies were identified that prospectively studied PNS for treatment of chronic pain.
The studies included patients with shoulder pain, neuropathic pain, or low back pain.
Reductions in pain and/or pain interference were consistently reported across all pain types.
Deer 2021: Proposed Mechanism of Action for Percutaneous PNS
Summary
Discusses potential mechanisms by which PNS may provide prolonged reductions in pain.
Remote selective targeting with PNS may produce robust comfortable sensations in the area of pain.
Prolonged pain relief may occur as a reversal of maladaptive cortical plasticity driven by PNS.
Staats 2021: Surveys of Patient Preference for LBP Interventions
Summary
Study using two market research surveys of chronic pain patient preferences for LBP interventions.
LBP patients preferred temporary interventions to permanently implanted devices.
Temporary PNS was the most preferred treatment option over RFA and permanent implants.
Case reports
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Gutierrez 2024: PNS for CRPS Case Reports
Summary
SPRINT PNS was used to treat complex regional pain syndrome (CRPS).
Three cases of CRPS in the lower extremity with significant and sustained relief of pain.
These three cases suggest that 60-day PNS can be a safe and efficacious treatment for CRPS.
Tate 2023: Technical Case Report on PNS of Musculocutaneous Nerve
Summary
Completed ultrasound-guided placement of short-term PNS lead targeting musculocutaneous nerve (MCN)
Patient had total pain resolution & coverage in antecubital & radial forearm areas during 60-Day PNS
Ultrasound-guided placement of PNS is feasible for targeting the MCN in refractory elbow pain
Kelly 2023: PNS Retrospective Case Series in Chronic Knee Pain
Summary
Retrospective case series (n=14): PNS targeting femoral and saphenous nerves for chronic knee pain
75% reported ≥50% pain reduction; 52% average pain relief at six months post-implantation
Demonstrated safety and efficacy with no adverse events
Posters
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McCormick 2025 NANS: RESET RCT Primary Endpoint Results in CLBP
Shaw 2025 NANS: EMR and Manufacturer Database Consistency
Aman 2025 NANS: Multicenter Review of Bimodal PNS in Shoulder