The Effect of Smart Ring Assisted Physiotherapeutic Intervention After TKR

The Effect of Smart Ring Assisted Physiotherapeutic Intervention on the Risk of Poor Outcome 12 Months After a Total Knee Replacement: a Randomized Controlled Trial

The goal of this randomized controlled trial is to learn about the effect of a wearable activity tracker assisted physiotherapeutic intervention on the risk of poor patient reported outcome after a primary total knee replacement.

The main question it aims to answer is whether a wearable activity tracker assisted physiotherapeutic intervention and remote monitoring may help to decrease the number of the poor patient reported post-operative outcome 12 months after a primary total knee replacement.

Participants will receive standard postoperative care which includes physiotherapy appointments 4 weeks and 3 months after the surgery and they will use smart rings (Oura ring) 3 months postoperatively. Patients will be remotely monitored to follow their recovery from total knee replacement surgery: the study group physiotherapists will follow the patients' activity and sleep and if necessary, make a contact with patient if there seems to low activity indicating difficulties with recovering from the surgery.

Researchers will compare the intervention group to a group of participants who will receive only standard postoperative care with physiotherapy appointments 4 weeks and 3 months, to see if the use of the Oura ring may decrease the number of participants with poor patient reported post-operative outcome after total knee replacement.

Inclusion Criteria:

• Patients undergoing primary TKA for primary osteoarthritis.
• Patients able to consent and willing to comply with the study protocol.
• Patients aged 18 to 70 years
• Patients is able to use a smartphone and a smart ring.

Exclusion Criteria:

• Patients unwilling to provide informed consent
• >15 degrees varus or valgus, or > 15 degrees fixed flexion deformity
• Physical, emotional, or neurological conditions that would compromise the patient, e.g., poor compliance with postoperative rehabilitation and follow-up (e.g., drug or alcohol abuse, serious mental illness, general neurological conditions, such as Parkinson, MS, etc.)
• Patients unable to attend the study physiotherapy appointments at the outpatient clinic.
• Patients unable to wear Oura ring (example in case of OA or rheumatoid arthritis in the finger joints).
• Patients with cardiac arrhythmia.