Stem cell intra-articular injection places prepared cells directly into a joint space rather than distributing them through the bloodstream. The knee is the joint most commonly treated this way, though other joints are also considered. Imaging guidance is sometimes used to confirm placement during the injection itself.
The reasoning behind local delivery is concentration at the target site. Research in this area focuses mainly on joint conditions involving cartilage wear and inflammation, and results reported so far vary by study design and follow-up length. Ask what evidence relates specifically to your joint and your stage of disease.
Practical points differ from systemic routes. The injection itself is short, but temporary joint discomfort or swelling afterward is commonly reported. Ask what activity is advisable in the following days, when normal movement can resume, and how the clinic would assess whether the injection has helped. Ask also whether the same joint can be treated again later, and what interval would normally be left between injections. Ask what the clinic would suggest if the first injection produces no change at all.
