Knowing when a shunt problem is an emergency — and acting on it — is one of the most important responsibilities of living with a shunt. This article is a focused, practical guide to the red flags that mean "go to the ER now." Keep it in mind, and don't hesitate to act on it.
Why shunt problems can be emergencies When a shunt malfunctions (blocks, disconnects, or fails) or becomes infected, CSF can build up and pressure can rise — sometimes rapidly. Because rising pressure can affect the brain, a serious shunt problem is a situation where timely treatment matters greatly. When in doubt, it's always safer to be evaluated.
Go to the ER right away — in babies and infants — for
- A markedly bulging or tense fontanelle (soft spot).
- Persistent or forceful vomiting.
- Extreme sleepiness or difficulty waking.
- A high-pitched cry or extreme, inconsolable irritability.
- Sunsetting eyes (eyes deviated downward).
- Seizures.
- A rapidly enlarging head.
Go to the ER right away — in children and adults — for
- Severe or rapidly worsening headache.
- Persistent vomiting.
- Increasing drowsiness, confusion, or difficulty waking.
- New vision changes — blurred or double vision, or eyes deviating.
- Seizures.
- Loss of consciousness.
- A noticeable change in alertness, responsiveness, or behavior.
- Fever with redness, swelling, or tenderness along the shunt tract (suggesting infection — especially after recent surgery).
The "return of original symptoms" rule A simple, powerful guideline: if the symptoms that led to the shunt in the first place return — or the classic raised-pressure symptoms appear — treat it as a possible shunt failure and seek care. People with shunts and their families often know their own normal; any significant deviation toward old symptoms is a reason to act.
What to do when you go to the ER.
- Tell the staff immediately that there is a shunt — its type, and if programmable, the setting. This is critical information that directs their evaluation.
- Bring any shunt documentation you have (a card, note, or records), and your neurosurgeon's contact information.
- If possible, contact your neurosurgery team as well, since they know the history and can guide the ER.
- Describe the symptoms clearly — what they are, when they started, and how they've changed.
How the ER evaluates a shunt emergency The team will assess for malfunction or infection using examination, imaging (often a CT or fast MRI to check ventricle size, and sometimes X-rays of the shunt tubing — a "shunt series" — to look for breaks or disconnections), and other tests as needed. If a problem is found, treatment (such as revision surgery for a malfunction, or treatment for infection) is arranged.
Don't "wait and see" with red flags With the warning signs above, timeliness is key — it's far better to be evaluated and reassured than to delay treatment of rising pressure or infection. This is especially true for babies and children, who can't always communicate, and for anyone whose old symptoms are returning.
A balanced reminder Not every headache or bout of nausea in someone with a shunt is an emergency — ordinary illnesses happen too. But the specific red flags above — severe or worsening symptoms, changes in alertness, return of original symptoms, or signs of infection — are the situations that warrant the ER. Knowing them in advance means you can act quickly and confidently when it counts.
The takeaway A shunt emergency calls for prompt action. Memorize the red flags for the relevant age group, follow the "return of original symptoms" rule, and when they appear, go to the ER and tell them about the shunt. Acting quickly on these warning signs is one of the most important things you can do to stay safe with a shunt.