Need to Know
Nice to Know
Frequently Asked Questions
How Does It Work?
With the guidance of ultrasound imaging (a painless exam which uses high-frequency sound waves to produce real time images ), your doctor will insert a tiny needle to draw fluid out from behind your knee and shrink or remove the Baker’s cyst.
What Happens — Before, During, and After?
You will lie on your stomach on the exam table for this procedure.. Your doctor will then give you a shot of local anesthesia to numb the area. You will feel a small pinch as the anesthesia is administered.
The target lesion is precisely localized by advancing the needle under CT image guidance and confirmed with a test injection of contrast material. Only after the location is precisely identified is the lesion aspirated/decompressed. Steroid medication and lidocaine are also administered to treat associated inflammation. The needle is removed, skin cleaned and a standard band-aid applied.
How Should I Prepare?
There are things you can do to make your experience more comfortable, and many of these will depend on your individual preferences. You might like to keep a list of questions or — as you’re doing now — educate yourself about the procedure.
Some other things to keep in mind in planning for this procedure include:
- You will need a driver to bring you and take you home
- Your doctor may ask you to stop taking aspirin, non-steroidal anti-inflammatory drugs (NSAIDS), or blood thinners (such as Coumadin or warfarin) for a time before the procedure
What Should I Bring?
On the day of your procedure you should:
- Wear comfortable, loose-fitting clothes
- Wear comfortable, shoes
- Avoid bringing jewelry or valuables
What Are the Benefits and Risks?
The benefits of a synovial cyst decompression could be:
- Relief of pain
- Reduced inflammation which may lead to healing
- Some risks you should be aware of include:
- As with any procedure there is a slight risk of infection
- Rarely, this procedure can cause a temporary increase in pain
- Rarely there are reactions to the medication such as rash or hot flashes
- There is a slight risk of nerve damage at the injection site
- There is a slight risk of bleeding
Keep in mind that this information is general. Your radiologist is the best source of information about how these risks and benefits may apply to you.