Subdural Hematoma Treatment
Middle meningeal artery embolization and surgical management of chronic subdural hematoma
Understanding Subdural Hematoma
A subdural hematoma is a collection of blood between the brain and its outer covering, the dura. Chronic subdural hematomas develop slowly, over weeks, often after a minor bump to the head that the patient may not even remember. They are most common in older adults, whose brains have shrunk slightly with age and whose bridging veins are more easily torn, and in people taking blood thinners.
As the collection grows, it presses on the brain and causes headache, confusion, weakness, difficulty walking, or slowed thinking that is sometimes mistaken for dementia. Chronic subdural hematoma is one of the most common conditions a neurosurgeon treats, and one of the most frustrating, because after traditional surgery it comes back in roughly one in ten to one in five patients.
Middle Meningeal Artery Embolization
The reason chronic subdural hematomas recur is that the membrane surrounding them grows its own fragile blood vessels, fed by the middle meningeal artery, and those vessels keep leaking. Middle meningeal artery embolization addresses that root cause. Through a small catheter inserted at the wrist or groin, I navigate to the middle meningeal artery and block it with tiny particles or liquid embolic agent, cutting off the blood supply to the leaking membrane. The hematoma then stops growing and is gradually reabsorbed by the body.
The procedure takes about an hour, requires no incision on the head, and in many cases can be done on an outpatient basis, with the patient going home the same day. Large randomized trials published in the New England Journal of Medicine in 2024 showed that adding embolization to standard care roughly halved the rate of recurrence and the need for repeat surgery.
As an Adjunct to Surgery
For patients who need surgical drainage because the hematoma is large or causing significant symptoms, embolization is performed alongside the operation, before or shortly after, to dramatically reduce the chance that the hematoma returns. This combination has become my standard approach for patients at high risk of recurrence, including those on blood thinners.
As a Standalone, Minimally Invasive Treatment
For selected patients with smaller hematomas and mild symptoms, embolization can be the only treatment needed. It avoids open surgery entirely, which is particularly valuable for frail or elderly patients and for those who cannot safely stop anticoagulation. The hematoma resolves over the following weeks and is followed with imaging.
Surgical Options
Burr Hole Drainage
The traditional treatment for a symptomatic chronic subdural hematoma is drainage through one or two small openings in the skull, usually with a drain left in place for a day or two. It relieves pressure quickly and remains the right choice when symptoms are significant.
Craniotomy
For acute hematomas with solid clot, or for chronic collections with thick membranes, a larger opening may be needed to remove the blood and membranes completely.
Observation
Small hematomas with minimal symptoms can sometimes be monitored with serial imaging, particularly when embolization has been performed to stop further growth.
Symptoms of Subdural Hematoma
- Headache that develops over days to weeks
- Confusion, slowed thinking, or drowsiness
- Weakness or numbness on one side of the body
- Difficulty walking or frequent falls
- Speech difficulty
- Seizures
Sudden severe headache, rapidly worsening confusion, or new weakness require emergency evaluation. Call 911.
Why Choose Dr. Walcott for Subdural Hematoma?
- Both Endovascular and Surgical Expertise: Fellowship-trained in endovascular neurosurgery and open cranial surgery, so embolization and surgery are planned together by the same surgeon
- Minimally Invasive, Often Outpatient: Middle meningeal artery embolization through the wrist or groin, with same-day discharge for many patients
- Evidence-Based Care: Treatment decisions grounded in the randomized trials that established embolization as a standard option
- Comprehensive Stroke Center: 24-hour neurointerventional and neurocritical care capability at Santa Barbara Cottage Hospital
- Harvard and MGH Training: Neurosurgical residency at Massachusetts General Hospital and Harvard Medical School
Frequently Asked Questions
It is a minimally invasive procedure in which a catheter is guided through an artery at the wrist or groin to the middle meningeal artery, the vessel that feeds the leaking membrane around a chronic subdural hematoma. Blocking that artery stops the hematoma from regrowing and allows the body to reabsorb it.
In many cases, yes. The procedure takes about an hour, requires no incision on the head, and patients who are treated with embolization alone are frequently discharged the same day. Patients who also need surgical drainage stay in the hospital for the surgery.
Sometimes. For smaller hematomas with mild symptoms, embolization alone can be sufficient. For larger or more symptomatic hematomas, surgical drainage is still needed to relieve pressure, and embolization is added to reduce the chance the hematoma comes back.
Randomized trials published in 2024 found that adding middle meningeal artery embolization to standard treatment roughly halved the rate of hematoma recurrence or the need for repeat surgery, with a low rate of complications.
Yes. Embolization is especially useful for patients on anticoagulation, who face a higher risk of recurrence after surgery and who often cannot safely stop their medication for long. Dr. Walcott coordinates anticoagulation management with each patient's physicians.
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If you or a family member has been diagnosed with a subdural hematoma, I'm here to help you understand whether embolization, surgery, or a combination is the right approach.
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