Normal pressure hydrocephalus Guide for patients and families
Recovery after shunt surgery for NPH: what to expect, week by week
The short answer
Most people go home one or two days after a shunt operation for NPH. Walking is usually the first thing to improve; bladder control and thinking follow more slowly and less reliably. The valve is fine-tuned in the office over the first few months, without further surgery. In the largest trial, the gain in walking speed was measured three months after the operation.
Written and medically reviewed by Carlos Esmond Sanchez, MD, neurosurgeon in Washington, DC. Last updated November 2026.
The timeline
What most people can expect. Your own course may differ, and I will tell you where.
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The day of surgery
The operation takes about an hour under general anesthesia, through small incisions on the scalp and the abdomen. You wake in a recovery area, where nurses check your alertness, speech and movement at regular intervals. Feeling tired and weak that day is expected.1
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Days 1 and 2
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Weeks 1 and 2
The incisions heal. Soreness along the path of the tubing, in the neck and the abdomen, is common and fades. Walk short distances several times a day, and avoid heavy lifting and strenuous activity until you are cleared.
Some people have headaches when sitting or standing in the first weeks. They usually settle, or respond to a change in the valve setting.
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Weeks 2 to 6
At the first follow-up visits the incisions are checked, your walking is timed again, and the valve setting is changed if you need more or less drainage. An adjustment takes a few minutes in the office, with a magnetic tool held against the skin.
Ask before you drive again. The answer depends on your walking, reaction time and thinking, not only on the incisions.
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Three months
This is the point at which the largest trial measured results. People with a working shunt walked 0.23 meters per second faster than before surgery, against 0.03 for those whose valve was not yet draining; a gain of 0.1 is considered meaningful. Falls were reported by 25% of the working-shunt group and 46% of the other group.3
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The years after
A shunt needs follow-up for life. In a study that followed 55 people for an average of 5.9 years, the improvement in walking was still present in 83% at three years and 87% at seven years.4
What improves, and how much
Walking improves most reliably. Across 54 studies and more than 4,800 patients, about three out of four improved after a shunt; bladder control and thinking each improved in about half.5
Families often notice steadier turns and fewer near-falls before the patient does. Thinking and bladder control change more slowly. They are also the symptoms most likely to have a second cause, such as Alzheimer’s disease or a prostate problem, that a shunt does not treat.
Rehabilitation
After months or years of walking cautiously, strength and balance have to be rebuilt. Physical and occupational therapy, in a rehabilitation unit or as an outpatient, helps people get the full benefit of the operation.2
The valve: adjustments and MRI scans
The valve is adjustable. The first setting is a starting point; over the first months it is raised or lowered according to how you are walking and whether you have headaches. Adjustable valves have reduced the need for repeat surgery and the rate of fluid collections over the brain.6
Adjustable valves are set with a magnet, so a strong magnet can change them. The strongest one you are likely to meet is an MRI scanner. In one hospital’s review of 210 MRI scans in people with adjustable valves, the setting had changed after 57% of them; valves with a locking mechanism are built to resist this.7
- Carry the card that names your valve and its setting.
- Tell the MRI staff about the shunt before any scan.
- Ask whether the setting needs to be checked after the scan.
- A thin tube rests in a ventricle, the fluid space inside the brain.
- A valve under the scalp, behind the ear, sets how much fluid drains. Its setting can be changed from outside with a magnet.
- Tubing runs under the skin of the neck and chest. It does not show through clothing.
- The fluid drains into the abdomen, where the body absorbs it naturally.
Risks during recovery, in numbers
In pooled studies about one patient in five had a complication of some kind, and about 15 in 100 needed a further operation over time.5 In the 2025 trial, bleeding or fluid over the surface of the brain occurred in 12 of 100 patients with a working shunt and 2 of 100 whose valve was not draining.3
In the long-term study, 53% of patients eventually needed at least one revision, most often because the shunt had stopped working, and about three out of four revisions brought the improvement back.4 So if walking slips after a good start, the first question is whether the shunt is still working, not whether the operation has failed.
When to call
Call my office the same day for any of these:
- a headache that is worse when upright and better lying down
- walking, thinking or bladder control slipping back toward where it was before surgery
- redness, swelling or fluid along an incision or the tubing, a fever, or new abdominal pain
Call 911 for a sudden severe headache, new weakness on one side, trouble speaking, a seizure, marked drowsiness or confusion, or a fall with a blow to the head.
What the family can do
- Record a short video of the walk before surgery, and again at two weeks, six weeks and three months. Change is easier to see side by side.
- Clear loose rugs and cords from the floor and put a night light on the way to the bathroom. Balance improves gradually.
- Keep one list of questions and of the changes you notice between visits.
- Come to the follow-up visits. What you have seen at home helps decide the valve setting.
Questions families ask
How long is the hospital stay after shunt surgery for NPH?
Usually one or two nights. Some people then spend a short time in a rehabilitation unit to rebuild strength and balance before going home.
How soon does walking improve after a shunt?
Walking is usually the first symptom to improve. The timing varies from person to person and with the valve setting. In the largest trial, people with a working shunt were walking 0.23 meters per second faster three months after surgery.
How long does a shunt last?
There is no fixed lifespan. In pooled studies about 15 in 100 people needed a further operation, and in one group followed for about six years, 53% needed at least one revision. Most revisions bring the benefit back, which is why follow-up continues for life.
Can I have an MRI with a shunt?
Yes, but tell the MRI staff which valve you have before the scan. An MRI can change the setting of some adjustable valves, so the setting may need to be checked afterward and reset if it has moved.