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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Control group | No Intervention | The control group of this trial will receive standard postoperative care which includes physiotherapy appointments 4 weeks and 3 months after the surgery. The 4-week physiotherapy appointment will be at local health center, occupational health clinic or in private physiotherapy clinic and patients are instructed to book the appointments independently according to the standard of care in Coxa Hospital. The 3-month physiotherapy appointment in Coxa Hospital will be carried out by physiotherapists who are dedicated to research projects at Coxa outpatient clinic. | |
| Intervention group | Experimental | The patients in the intervention group will receive standard physiotherapy care but patients also use smart rings (Oura ring) 3 months postoperatively. Patients will be remotely monitored to follow their recovery from TKR 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. If there is a constantly decreasing trends in these parameters or patient improvement plateaus, patient is contacted and their status is evaluated by telephone. Based on the information from this contact, the patients may be asked to visit the physiotherapist at the outpatient clinic to assess the situation, and also anesthetist may be consulted on the pain medication. Data collected with the Oura ring will also be used in physiotherapy appointments as a part of therapeutic treatment and guidance. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Smart ring assisted physiotherapeutic intervention | Other | the effect of a smart ring (Oura), a wearable activity tracker assisted physiotherapeutic intervention on the risk of poor outcome measured on patient reported post-operative outcome (Oxford Knee Score) 12 months after a primary total knee replacement. |
| Measure | Description | Time Frame |
|---|---|---|
| the proportion of patients with poor postoperative outcome | 12 months after total knee replacement surgery |
| Measure | Description | Time Frame |
|---|---|---|
| homogeneity of variance in the Oxford Knee Score | 12 months after the surgery | |
| Oxford Knee Score | difference between groups | 3 months after the surgery |
| Measure | Description | Time Frame |
|---|---|---|
| the visits to the emergency department | during the 12-month follow-up after surgery | |
| the readmissions to Coxa Hospital | during the 12-month follow-up after surgery | |
| The rate of manipulation under anesthesia |
Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Aleksi Reito, MD, PhD | Contact | +358444729631 | aleksi.reito@pshp.fi | |
| Elisa Leinonen, RN | Contact | +358331178030 | elisa.leinonen@coxa.fi |
| Name | Affiliation | Role |
|---|---|---|
| Aleksi Reito, MD, PhD | Coxa, Hospital for Joint Replacement | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Coxa Hospital for Joint Replacement | Recruiting | Tampere | Pirkanmaa | 33520 | Finland |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 40379331 | Derived | Hautala J, Koriseva L, Reito A, Mattila V, Eskelinen A. Effect of a smart ring-assisted physiotherapeutic intervention on the postoperative outcomes 12 months after a total knee replacement (SmarTKRing): protocol for a randomised controlled trial. BMJ Open. 2025 May 15;15(5):e091956. doi: 10.1136/bmjopen-2024-091956. |
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We will share IPD against well-planned research protocol.
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The study design is a 2 arm, 1:1 randomized, controlled, single-center trial adhering to Standard Protocol Items: Recommendation for Interventional Trials (SPIRIT) guidelines. The study will be carried out at Coxa Hospital for Joint Replacement (Tampere, Finland), a university-affiliated publicly funded orthopaedic hospital specializing in joint replacement surgery.
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| Oxford Knee Score | difference between groups | 6 months after the surgery |
| Oxford Knee Score | difference between groups | 12 months after the surgery |
| EQ-5D-5L | difference in quality of life | 3 months after the surgery |
| EQ-5D-5L | difference in quality of life | 6 months after the surgery |
| EQ-5D-5L | difference in quality of life | 12 months after the surgery |
| Forgotten Joint Score 12 (FJS-12) | 3 months after the surgery |
| Forgotten Joint Score 12 (FJS-12) | 6 months after the surgery |
| Forgotten Joint Score 12 (FJS-12) | 12 months after the surgery |
| pain at rest using the visual analoque (VAS scale) | 3 months after surgery |
| pain at rest using the visual analoque (VAS scale) | 6 months after surgery |
| pain at rest using the visual analoque (VAS scale) | 12 months after surgery |
| pain while walking using the visual analoque (VAS scale) | 3 months after surgery |
| pain while walking using the visual analoque (VAS scale) | 6 months after surgery |
| pain while walking using the visual analoque (VAS scale) | 12 months after surgery |
| active knee range of motion | 3 months after surgery |
| active knee range of motion | 12 months after surgery |
| passive knee range of motion | 3 months after surgery |
| passive knee range of motion | 12 months after surgery |
| The patient satisfaction VAS | 12 months after surgery |
| patient accepted symptom state questions | 12 months after surgery |
| during the 12-month follow-up after surgery |
| complications | during the 12-month follow-up after surgery |