First, some reassurance: residual or returning tremor after DBS is common and well documented, not a sign that your surgery failed. Early on, thalamic (VIM) stimulation typically reduces action tremor by 80 to 90 percent. But long-term studies show that control can fade: roughly 30 to 40 percent of patients experience a gradual loss of benefit over months and years — described in the literature as habituation, tolerance, or "therapy escape" (Peters & Tisch, Front Neurol, 2021). DBS also tends to be less effective on proximal (upper-arm) action tremor, which is often the most disabling kind. So a person who still shakes when reaching for a cup, or whose tremor has partly returned, is in a familiar situation — and a passive device may help with those remaining daily tasks.
Here's the core issue. The best-known wearable tremor devices — such as the Cala kIQ, and the newer Encora X1 — work by delivering electrical stimulation to nerves at the wrist. And an external electrical device plus an implanted electrical stimulator is a combination manufacturers specifically warn against.
The Cala kIQ's instructions for use contraindicate patients with implanted electrical devices — a pacemaker, defibrillator, or deep brain stimulation system — to avoid the risk of electric shock, burns, electrical interference, or death (Cala Health, Indications for Use). The reason is straightforward: two independent electrical stimulation systems operating in the same person can interfere with one another, potentially disrupting the implanted DBS device or creating unpredictable and unsafe interactions. This isn't a knock on the Cala kIQ, which is an effective, Medicare-covered device for many people — it simply isn't built for someone who already has an implanted stimulator. The same electrical-interference caution applies in principle to other electrical wearables, including the Encora X1, so DBS patients should treat any electrical stimulation device as off-limits unless their neurologist says otherwise.
A passive mechanical glove sidesteps that problem entirely, because it uses no electricity at all. The Steadi-3 Plus works through a passive magnetic vibration absorber / tuned mass damping technology — a purely mechanical system that absorbs tremor energy during voluntary movement. There's no battery, no stimulation, and no electrical output, so it introduces no second electrical system for a DBS implant to interact with. Accordingly, the Steadi-3 Plus carries no contraindication for deep brain stimulation implants. It's also worn on the hand, away from the implanted pulse generator and its leads.
For context on how it performs, the company's clinical testing found that 84% of participants showed improved tremor control versus no device, and 70% of participants showed improved tremor control versus a placebo glove. That evidence is the manufacturer's own clinical testing rather than a peer-reviewed publication — a fair thing to weigh — but the key point for DBS patients is the mechanism: a passive device raises none of the electrical-interference concerns that rule out stimulation wearables.
If your tremor persists after DBS and you want to try a wearable, the practical path is short. Rule out electrical stimulation devices unless your neurologist specifically clears one. Consider a passive mechanical option, which raises no electrical-interference concern. Confirm your choice with your DBS team, who can factor in your implant and settings. And test the device on the tasks that actually matter to you — eating, drinking, writing — during any trial or return period before committing. Residual tremor after DBS is common, and having a non-electrical way to steady the remaining shake can make a real difference to daily life.