Background: Bladder symptoms are common in Parkinson disease (PD), affecting quality of life. Medications commonly used such as antimuscarinics can cause frequently intolerable side effects, and therefore, new, better tolerated approaches are needed. Neuromodulation techniques have an established role in urologic disorders; these techniques include tibial nerve stimulation (TNS) and sacral neuromodulation (SNM), which are localized therapies lacking the side effects associated with medication.
Objectives: This study aimed to undertake a systematic review of the literature reporting the use of neuromodulation techniques for the treatment of bladder symptoms in PD and related conditions.
Materials And Methods: A systematic search of data bases was conducted including MEDLINE, CENTRAL, and Web of Science. Studies were required to present specific outcomes for individuals with PD for neuromodulation interventions.
Results: Ten primary studies were identified concerning detailed outcomes of neuromodulation on bladder symptoms in PD, including seven for TNS, one for SNM, and one using transcranial magnetic stimulation (TMS). Two further mixed cohort studies documented minimal data on individuals with PD. All studies demonstrated benefit in a range of outcome measures following neuromodulation. Two randomized sham-controlled studies were carried out using TNS, with one clearly demonstrating superiority over sham, although difficulties with achieving believable yet ineffective sham treatment are highlighted. Further studies reported limited, uncontrolled outcomes of SNM in patients with PD, demonstrating benefit.
Conclusions: Evidence from case series suggests benefit from TNS in PD, with limited literature on SNM or TMS. Placebo effect from neuromodulation is a concern, and only limited controlled data exist. Future well-designed and sham-controlled studies need to be completed to provide definitive data on the benefit of neuromodulation in PD. Definitively proving the utility of a neuromodulation modality will allow better treatment of bladder symptoms without the need for pharmacologic measures that cause side effects.
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| http://dx.doi.org/10.1016/j.neurom.2022.01.019 | DOI Listing |
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