Is There an Age Limit for DBS Surgery?

In brief

There is no single age limit that determines whether every patient can or cannot have deep brain stimulation.

Age is an important consideration, but it is not assessed on its own. Overall health, cognitive function, balance, symptom pattern, response to levodopa and expected functional benefit are usually more important than the number on a patient’s passport.

A fit patient in their seventies may be a more appropriate DBS candidate than a younger patient whose symptoms are unlikely to respond to stimulation.

Why does age matter?

The likelihood of other medical conditions, frailty, balance problems and cognitive impairment may increase with age. These factors can influence surgical risk, recovery and the expected benefit from DBS.

Older patients may also have more Parkinson’s symptoms that do not respond reliably to stimulation, such as:

• Medication-resistant balance problems

• Frequent falls

• Speech or swallowing difficulties

• Cognitive decline

• Severe freezing that does not improve with levodopa

This does not mean that an older patient is automatically unsuitable. It means that the assessment should be individual and realistic.

What is evaluated before DBS?

A DBS candidacy assessment usually considers:

• Confirmation of the Parkinson’s diagnosis

• Duration and pattern of symptoms

• Response to levodopa

• Severity of tremor, rigidity and slowness

• Motor fluctuations and dyskinesia

• Walking and balance

• Cognitive function

• Psychological and psychiatric health

• Brain imaging

• Heart, lung and general medical health

• Ability to attend programming and follow-up visits

The aim is to determine whether the symptoms causing the greatest disability are likely to improve with DBS.

Can patients over 70 have DBS?

Selected patients over 70 may still be considered for DBS. Chronological age alone does not provide enough information to make the decision.

For example, an older patient with disabling medication-responsive tremor, preserved cognition and good general health may still obtain meaningful benefit.

However, the expected benefits and risks should be discussed carefully. The treatment plan may also need to consider additional support during recovery and long-term programming.

When might DBS be unsuitable?

DBS may be less appropriate when the main problems are unlikely to respond to stimulation or when the risks outweigh the expected benefit.

Examples may include:

• Significant dementia

• Uncontrolled psychiatric illness

• Severe frailty

• Medical conditions that make surgery unsafe

• Predominantly medication-resistant gait and balance problems

• Inability to participate in follow-up and programming

• Uncertain diagnosis

These are not decisions that should be made from a questionnaire or age alone. They require neurological, cognitive and neurosurgical evaluation.

Does age affect the choice of DBS target?

Age may be one of several factors considered when selecting the stimulation target, but it is not the only factor.

The choice between targets such as the subthalamic nucleus and globus pallidus interna depends on the patient’s motor symptoms, medication needs, dyskinesia, cognitive profile and treatment goals.

Target selection should therefore be personalised rather than based on a fixed age rule.

Can international patients be assessed remotely?

An initial assessment can often begin remotely.

Useful information may include:

• Neurology reports

• Current and previous medications

• Brain MRI

• Videos showing walking, tremor and daily movement

• Description of medication-on and medication-off periods

• Cognitive or neuropsychological assessments, if available

A remote review can help determine whether a full DBS evaluation is reasonable. However, final candidacy normally requires an in-person neurological and surgical assessment.

Frequently asked questions

Am I too old for DBS at 70?

Not necessarily. Suitability depends on your health, cognition, symptoms and likely benefit rather than age alone.

Is DBS riskier in older patients?

Some surgical and recovery risks may increase with age and associated medical conditions. Individual risk assessment is therefore necessary.

Can DBS improve balance in an older patient?

DBS may help mobility when the difficulty is related to medication-responsive rigidity or slowness. Balance problems that do not improve with levodopa are less likely to respond.

Does every candidate need cognitive testing?

Cognitive assessment is an important part of DBS evaluation. The exact form of testing depends on the patient and the DBS centre.

Can a patient with mild memory problems have DBS?

Mild complaints do not automatically exclude DBS, but they should be assessed carefully. Significant dementia generally makes DBS less suitable.

Conclusion

There is no universal maximum age for DBS surgery. The decision should be based on biological health, cognitive status, symptom pattern, treatment goals and the balance between expected benefit and risk.

In my discussions with patients, I focus on function rather than age alone: Which symptoms are limiting daily life? Do they improve with medication? Is cognition preserved? Can the patient safely undergo surgery and participate in follow-up?

These questions provide a more meaningful assessment than a fixed age cut-off.

Sources: Parkinson’s Foundation – Deep Brain Stimulation; International Parkinson and Movement Disorder Society – Deep Brain Stimulation for Parkinson’s Disease; National Institute of Neurological Disorders and Stroke – Deep Brain Stimulation.

Dr Kaan Tuğberk Özdemir

Neurosurgeon – İzmir, Türkiye

Activity recommendations must be individualised by the surgical and rehabilitation teams.