Surgical Revision of Deep Brain Stimulation After Suboptimal Clinical Outcomes: A Systematic Review and Exploratory Meta-analysis

In DBS patients with inadequate benefit after optimized programming, surgical lead revision, rescue leads, or target switching improved outcomes in 81% (95% CI 68 to 91%) across 14 studies.

• Why it matters: The work addresses a clinical gap: some DBS recipients do not respond as expected even after programming optimization, and the evidence for whether revision helps is unclear.
• What they did: Following PRISMA 2020, the authors searched PubMed, Embase, and Scopus to October 2026 for case series of lead repositioning, replacement, added leads, or target switching (excluding infection or hardware failure), then pooled results with random-effects models and applied GRADE.
• The result: In Parkinson disease, off-medication/on-stimulation motor scores decreased by 15.6 points after lead revision (95% CI 68 to 91%; four studies), with very low certainty and reports of complications and two deaths.

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