PRP injections for joints
PRP injection · platelet-rich plasma · PRP for knees · plasma injection
A little of your blood is taken. A centrifuge separates the plasma with platelets, and it is injected into a joint or tendon.
Sometimes for knee arthritis or tendon and ligament problems. It does not help everyone. Talk with your doctor about whether it suits you.
⏱ Duration: usually 30 to 60 minutes; the effect, if any, shows after a few weeks; a course is often needed
Be sure to tell your doctor
How to prepare
- Medicines. You are sometimes asked to stop anti-inflammatory pills for a few days before and after. Do not stop them on your own. Ask your doctor.
- Food. Eat light, without fatty food, and drink water. This gives better plasma.
- Clothing. Comfortable clothes, so the joint is easy to uncover.
What to bring
- Your referral
- Joint images
- A list of your medicines
How it goes
- Blood is taken from a vein, like a blood test
- The tube is spun in a centrifuge for a few minutes
- The skin over the joint is cleaned with antiseptic
- Sometimes the joint is numbed
- The doctor injects the plasma into the joint with a needle, often guided by ultrasound
- A bandage is put on
What you'll feel
- A prick when blood is taken and when the injection is given
- A feeling of fullness in the joint
- Pain and swelling in the joint for 1 to 3 days after are common
Afterwards
- For the first few days, avoid putting heavy strain on the joint
- Cold on the joint is fine if it hurts. Anti-inflammatory pills only if your doctor advises
- Your doctor will decide on repeat injections
Contact a doctor straight away if
- The joint is hot, very swollen, and painful, or you have a fever over 38°C (100.4°F): see a doctor right away
- Pain gets much worse after 2 to 3 days
Common questions
Will it definitely help?
Not for everyone. For some people the pain gets better, for others the effect is weak. Your doctor will say whether it makes sense for you.
Can I be allergic to my own plasma?
An allergy to your own plasma is unlikely. But pain and swelling in the joint after the injection can happen.