Can a dislocated patella cause rsd?

Possibly: The exact cause for rsd is still not very clear. We know even miniiscule trauma can initiate this.

Any injury.: In the 50s travell, md a pain pioneer concluded that chronic tissue pain was caused by numerous trigger points in muscle fibers causing the muscles to contract compressing nerves, vessels and alter the flow of lymphatics. Rds develops from this myofascial dz. Early therapy is the key with myofascial release therapy with massage, tissue therapy, trigger pt injs w Lidocaine and acupuncture.

Yes: If it injures the nerves to that area causing chronic pain. Chronic pain can lead to maldunction of your sympathetic nervous system and thus rsd.