The aim of this prospective observational study is to detect rebound pain and related factors in postoperative patients with total knee arthroplasty.

Total knee arthroplasty is an effective treatment method for knee osteoarthritis and because it is an invasive method, more than 50% of patients experience postoperative pain. Peripheral nerve blocks are widely used for optimal pain control. The femoral block is a frequently preferred peripheral nerve block method for postoperative analgesia in total knee arthroplasty surgery. However, after peripheral nerve block, a condition called rebound pain (rebound pain), which is described as very severe pain, lasting about 2 hours, usually of the burning type, occurs. The aim of this prospective observational study is to detect rebound pain and related factors in postoperative patients with total knee arthroplasty.

Inclusion Criteria:

• 18-80 years older age who underwent total knee arthroplasty

Exclusion Criteria:

• ASA score 4 or >4
• Active infection
• End stage organ failure
• Pregnancy
• Established diagnosis neuropsychiatric disease ( epilepsy, neuropathy, neuromuscular disease, cerebrovascular disease...)
• Uses of oral corticosteroids

- 18-80 years older age who underwent total knee arthroplasty