Hello,
Sometimes post scope it can take some time before the knee stops swelling, especially with activity. It's important to get the swelling out. An effective method is the usual RICE method. You can use an ice gel pack that can shape around the knee. Use a tensor to wrap it snuggly, tighter at the bottom and looser at the top so the fluid can move upwards towards your torso. Then elevate the legs. On the market is something called a Corflex Cryo Pneumatic Knee Splint, that acts like a blood pressure cuff to push out fluid. It works great, but costs more.