A gel-like fluid called hyaluronic acid is injected into the knee joint. Hyaluronic acid is a naturally occurring fluid found in the synovial fluid that surrounds the joints. It provides lubrication that allows bones to move smoothly over each other and serves as a shock absorber for joints. It provides a flow of more movement and reduces pain in your arthritic joint.
WHAT HAPPENS DURING AN INJECTION?
If there is swelling in the knee, there is a possibility that the doctor will aspirate any excess fluid before the hyaluronic acid is injected on the knee.
WHAT HAPPENS AFTER AN INJECTION?
You will be monitored for up to 30 minutes after the injection. When you are ready to leave, the clinic will give you discharge instructions. You will also be given a pain diary. It is important to fill this out because it helps your doctor know how the injection is working.
For the first 48 hours after the shot, you must avoid any prolonged weight bearing movements and any strenuous activities. Immediate swelling may also occur on the knee after the shot is administered.