This information answers some commonly asked questions about Ommaya reservoirs and Ommaya taps.
About Ommaya Reservoirs
An Ommaya reservoir is a quarter-sized, soft, plastic, dome-shaped device that is placed under your scalp. It’s connected to a catheter (thin, flexible tube) that’s placed through your brain, in one of your ventricles (see Figures 1 and 2). Your ventricles are hollow spaces that make cerebrospinal fluid (CSF), which surrounds your brain and spinal cord.
An Ommaya reservoir will help your healthcare provider:
- Get samples of your CSF. Your healthcare provider can check your CSF for cancer cells or infections.
- Give you medication, such as chemotherapy, monoclonal antibodies, or antibiotics, directly into your CSF.
These procedures are referred to as an “Ommaya reservoir tap.” You may need fewer spinal taps if you have an Ommaya reservoir.
Your Ommaya reservoir will be placed during a surgery. Your doctor or nurse will explain the details of your surgery. Your nurse will help you prepare and will give you a resource called Getting Ready for Surgery. You can also search for the resource at www.mskcc.org/pe
The reservoir usually isn’t removed unless you have complications with it.
For at least 6 to 8 weeks after your Ommaya reservoir placement surgery, don’t participate in any contact sports (such as football, boxing, or wrestling). This gives your incision (surgical cut) time to heal.
Talk with your neurosurgeon about when you can resume contact sports again. Remember to wear a helmet, if needed. This reduces your risk of getting a head injury.
Your Ommaya reservoir doesn’t need special care. You can wash your hair as usual.
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About Ommaya Reservoir Taps
Tell your healthcare provider if you’re allergic to iodine (Betadine®). They will use a different solution.
You don’t need to do anything else to prepare for your tap. You can eat your meals and take your medications as usual.
Your healthcare provider will perform your tap in an exam room or at your bedside.
- Your healthcare provider will gently feel the Ommaya reservoir. They will push down on it several times to pump it. This pulls the CSF into the reservoir.
- You may be asked to lie on your back. Your healthcare provider will clean your skin with Betadine or with a different solution if you’re allergic to Betadine.
- Your healthcare provider will insert a small needle with tubing attached to it into your Ommaya reservoir (see Figure 3). You might feel slight discomfort from the needlestick. Your healthcare provider will take out a small amount of CSF through a syringe that’s attached to the tubing. The CSF may be sent to the lab to check for cancer cells or infection. If you’re also getting medication during the tap, some of the CSF may be saved in the syringe to be used as a “flush” (see step 4).
- If you are getting medication during the tap, your healthcare provider will inject it slowly into your reservoir, after withdrawing the CSF. They will then flush your Ommaya reservoir with the saved CSF to push the medication into your ventricles.
- Your healthcare provider will remove the needle and apply gentle pressure with gauze for about 1 minute to prevent any CSF from leaking out. The area may then be covered with a bandage (Band-Aid®).
The tap usually takes about 15 minutes.
You can resume all your normal activities after your tap, including washing your hair. Your Ommaya reservoir won’t need any special care.Back to top
Call Your Healthcare Provider if You Have:
- Tenderness, redness, or swelling around your reservoir
- Clear, bloody, or pus-like discharge from your reservoir
- A temperature of 100.4º F (38ºC) or higher
- Neck stiffness
- Blurry vision