Ventriculostomy: Procedure, Types, and Recovery
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Ventriculostomy is a surgical procedure that drains excess cerebrospinal fluid (CSF) from a ventricle, one of the fluid-filled cavities in the brain, to relieve dangerous pressure on the brain [1]. It treats hydrocephalus, bleeding inside the skull, increased intracranial pressure and traumatic brain injury [1]. It can be done with an external ventricular drain (EVD) or as an endoscopic third ventriculostomy (ETV), and complete recovery can take up to six weeks [1].
Quick Answer: What is a ventriculostomy?
A ventriculostomy is a neurosurgical procedure that removes excess cerebrospinal fluid to relieve pressure on the brain. The surgeon makes a small hole in the skull and passes a catheter or endoscope into a ventricle, either draining fluid outside the body or creating an internal opening so it can be reabsorbed [1]. It is often an emergency operation [1].
What the research says
ETV had fewer infections and blockages than a shunt for obstructive hydrocephalus. A meta-analysis of 5 randomized trials (310 patients) found that ETV was associated with a lower risk of postoperative infection (RR 0.11, 95% CI 0.04-0.33) and blockage (RR 0.15, 95% CI 0.03-0.75) than ventriculoperitoneal shunting, with no significant difference in operative success (RR 1.18, 95% CI 0.77-1.82) (Pasqualotto et al., Asian J Neurosurg, 2023) [2].
Care bundles lower infection risk with external drains. A meta-analysis of 17 mostly quasi-experimental and retrospective studies found that bundles of at least three preventive measures reduced infection risk in patients with external ventricular drains (pooled RR 0.32, 95% CI 0.20-0.51), but did not significantly reduce mortality (Ramadan et al., Neurosurg Rev, 2026) [3].
How the drain is secured may affect accuracy and leaks. A meta-analysis of 10 studies (2,008 adults) found that bolt-mounted external drains had higher optimal catheter placement than tunnelled drains (RR 1.27, 95% CI 1.06-1.51) and fewer CSF leaks (RR 0.13, 95% CI 0.04-0.47), with no significant difference in CSF infection (RR 0.88, 95% CI 0.71-1.09) (Patel et al., J Clin Neurosci, 2026) [4].
Understanding Ventriculostomy
A ventriculostomy is a surgical procedure to drain excess cerebrospinal fluid (CSF) from a ventricle, a fluid-filled cavity in the brain. CSF is a clear liquid that surrounds the brain and spinal cord and protects the brain from injury. When its flow or reabsorption is disrupted, it can build up in the ventricles, and too much CSF puts pressure on the brain. This increased intracranial pressure (ICP) can be life-threatening [1].
Because rapid relief of pressure can save a life, a ventriculostomy is often done as an emergency operation, and you may not have much time to prepare. By creating a controlled pathway for fluid to leave the ventricle, surgeons can stabilize the patient and prevent further neurological decline. A ventriculostomy is not the same as a shunt: it creates an opening to drain fluid, while a shunt is a more permanent implanted device [1].
Conditions Treated by Ventriculostomy
Condition | Description |
Hydrocephalus | Excess CSF builds up in the ventricles, causing them to enlarge. |
Intracranial Hemorrhage | Bleeding within the skull that can block CSF pathways or increase volume. |
Increased ICP | Elevated pressure within the skull from various causes, including swelling. |
Traumatic Brain Injury | Physical injury that leads to brain swelling or disrupted fluid dynamics. |
Types of Ventriculostomy
There are two main types of ventriculostomy, chosen according to your needs and the cause of the fluid buildup.
External ventricular drain (EVD): A surgeon places a thin, flexible catheter through a small hole in the skull into a ventricle. Outside the body, the end of the catheter connects to a drainage system that helps CSF move out of the ventricle. The catheter also lets the care team monitor intracranial pressure, manage CSF levels and give medicines if necessary [1].
Endoscopic third ventriculostomy (ETV): A surgeon makes a small incision and uses an endoscope, a thin, flexible tube with a light and camera, to reach the bottom of the third ventricle. The third ventricle has a central location, which makes it easy to access [1]. A hole is created there so CSF can drain into the surrounding tissue, where the body reabsorbs it [1].
The Surgical Procedure
Before surgery, a surgeon examines you, orders tests and reviews your imaging scans. Your care team explains the risks and asks you to sign a consent form [1]. You may be told to take antibiotics and avoid blood-thinning medicine, to have extra preoperative tests, and to arrange for someone to help you at home afterward [1].
On the day of surgery you receive either general anesthesia, which puts you to sleep, or local anesthesia, which numbs the area while you stay awake. The team shaves a small amount of hair to clear the area for the incision [1]. The surgeon then:
Makes a small hole in the skull with a surgical drill.
Inserts an endoscope or a catheter into the hole.
Carefully moves it through brain tissue to reach the ventricle.
Creates an opening in the ventricle, or places the catheter, so excess CSF can drain.
Closes the incision in the scalp with stitches or staples. [1]
With an EVD, the catheter stays in place and connects to the external drainage system, while in an ETV the endoscope is removed once the opening is made. The procedure usually takes about an hour [1].
Success and Recovery
A ventriculostomy is often lifesaving because it can prevent too much CSF from pressing on the brain. Providers consider an ETV successful if it results in a safe intracranial pressure, a smaller ventricle size and no need for a shunt [1]. The success rate of ETV ranges from 60% to 85%, depending on factors such as your age, general health and whether you previously had a shunt [1].
After surgery you are monitored until the anesthetic wears off. If you had general anesthesia you may wake up groggy and tired. Your care team asks you questions and may ask you to move your fingers, toes, arms and legs to check that your brain function has not changed [1]. You will usually stay in the hospital for a couple of days to make sure you are healing as expected [1].
Recovery Phase | Typical Expectations |
Immediate Post-Op | Monitoring of neurological function, including mental clarity and movement of the fingers, toes, arms and legs. |
First Weeks | Healing of the incision; most people need at least two weeks off work or school. [1] |
Up to 6 Weeks | Complete recovery can take up to six weeks; your provider will give you the best estimate. [1] |
Long-Term | Regular follow-up, with imaging scans and blood tests every few months, to monitor the underlying condition. [1] |
A ventriculostomy may be a temporary or a permanent fix, but the underlying condition or injury that caused the excess fluid needs frequent monitoring throughout your life [1].
Risks and Complications
All surgery has risks, and your surgical team takes extra precautions to prevent complications. The risks of a ventriculostomy may include [1]:
Bleeding
Blood clots
Catheter misplacement, so that CSF does not drain
Cerebrospinal fluid leak
Infection (ventriculitis)
Draining too much CSF
When to Contact Your Provider
Contact your healthcare provider if you have any of these symptoms after a ventriculostomy [1]:
Fever
Bleeding
Swelling
Pus leaking from the incision site
Severe pain
Confusion or memory loss
Conclusion
Ventriculostomy is a common and often lifesaving neurosurgical procedure that relieves dangerous pressure from excess cerebrospinal fluid. Whether it is done with an external drain or as an endoscopic third ventriculostomy, recovery can take up to six weeks and the underlying condition needs long-term follow-up. If you or a loved one needs a ventriculostomy, your neurosurgical team can explain what to expect and support you through treatment and recovery.
Frequently Asked Questions
What is the main purpose of a ventriculostomy?
A ventriculostomy drains excess cerebrospinal fluid from a ventricle in the brain to relieve pressure that can be life-threatening. It treats conditions such as hydrocephalus and traumatic brain injury.
How long does a ventriculostomy take?
A ventriculostomy usually takes about an hour to complete.
What is the difference between a ventriculostomy and a shunt?
A ventriculostomy creates a temporary opening to drain excess fluid, while a shunt is a more permanent option that uses a catheter to divert CSF to another part of the body, usually a space in the abdomen. Your surgeon decides which is best for you.
What are the two main types of ventriculostomy?
The two types are the external ventricular drain (EVD), in which a catheter placed in a ventricle connects to a drainage system outside the body, and endoscopic third ventriculostomy (ETV), in which an opening in the floor of the third ventricle lets CSF drain into surrounding tissue to be reabsorbed.
What is the success rate of ETV?
The success rate of endoscopic third ventriculostomy ranges from 60% to 85%. It counts as a success when it gives a safe intracranial pressure, a smaller ventricle size and no need for a shunt, and it depends on factors such as age, general health and previous shunts.
How long is the hospital stay after a ventriculostomy?
You usually stay in the hospital for a couple of days so the care team can monitor your neurological function and healing.
When can I return to work or school?
Most people need to take at least two weeks off work or school and rest for a few weeks, and it can take up to six weeks to recover completely.
What are the risks of a ventriculostomy?
Risks include bleeding, blood clots, catheter misplacement (CSF does not drain), a CSF leak, infection (ventriculitis) and draining too much CSF.
Will my hair be shaved for the surgery?
Yes, the surgical team shaves a small amount of hair to clear the area for the incision. It is usually small enough that it does not change your appearance much.
How do I prepare for a ventriculostomy?
A ventriculostomy is often an emergency, so there may be little time to prepare. [1] When there is time, your surgeon does a physical exam, reviews your tests and imaging, and orders any other needed testing. Take or stop medicines as directed: antibiotics are usually recommended and blood thinners are usually avoided. Arrange help at home and sign a consent form after the team explains the risks. [1]
Does a ventriculostomy hurt, and what anesthesia is used?
An anesthesiologist gives either general anesthesia, so you are asleep and won't feel pain, or local anesthesia, which numbs the area while you stay awake. [1] Afterward you may wake up groggy while the team checks your brain function; severe pain after the procedure is a reason to contact your provider. [1]
When should I contact my healthcare provider after the procedure?
Contact your provider if you have a fever, bleeding, swelling, pus leaking from the incision, severe pain, confusion or memory loss.
Related Reading
References
Cleveland Clinic. Ventriculostomy. Cleveland Clinic. Last updated June 20, 2024. https://my.clevelandclinic.org/health/procedures/ventriculostomy
Pasqualotto E, Schmidt PHS, Ferreira ROM, et al. Endoscopic Third Ventriculostomy versus Ventriculoperitoneal Shunt in Patients with Obstructive Hydrocephalus: An Updated Systematic Review and Meta-Analysis. Asian J Neurosurg. 2023;18(3):468-475. PMID 38152541. https://doi.org/10.1055/s-0043-1774308
Ramadan M, Mohamed SF, Abdulalim AA, et al. Is there a way to reduce the infection associated with external ventricular shunts? A systematic review and meta-analysis of the recent bundle of care. Neurosurg Rev. 2026;49(1):133. PMID 41549144. https://doi.org/10.1007/s10143-025-04029-4
Patel S, Nischal SA, Sinha A, et al. Safety and effectiveness of bolt-mounted versus tunnelled external ventricular drains: A systematic review, meta-analysis and trial-sequential analysis. J Clin Neurosci. 2026;145:111860. PMID 41534165. https://doi.org/10.1016/j.jocn.2026.111860
Medical disclaimer
The information provided in this article is for educational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
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