ClinicalTrials.gg
RecruitingNCT05599776SmarTKRingUpdated Nov 14, 2022

The Effect of Smart Ring Assisted Physiotherapeutic Intervention After TKR

An interventional study of Smart ring assisted physiotherapeutic intervention in Osteo Arthritis Knee, sponsored by Coxa, Hospital for Joint Replacement. Recruiting at 1 site in Finland. Open to participants aged 18 Years to 70 Years. Per ClinicalTrials.gov, last updated 2022-11-14.

Sponsored by Coxa, Hospital for Joint Replacement · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Started Nov 2022; still recruiting 4 years later.

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Phase
Not applicable
Study type
Interventional
Enrollment
338
Allocation
Randomized
Ages
18 Years to 70 Years
Sex
All
01

Study summary

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.

02

Conditions studied

  • Osteo Arthritis Knee

Keywords

  • total knee replacement
  • wearable activity tracker
  • smart ring
  • physiotherapy
03

In context

Lead sponsor

Coxa, Hospital for Joint Replacement is the lead sponsor of 8 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

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

Exclusion Criteria:

  • Patients unwilling to provide
  • >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.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
338 participants (estimated)

Study arms

  • No intervention
    Control group

    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.

  • Experimental
    Intervention group

    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.

    Other: Smart ring assisted physiotherapeutic intervention

Interventions

  • OtherSmart ring assisted physiotherapeutic intervention

    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.

06

What researchers measure

Primary outcomes

  1. the proportion of patients with poor postoperative outcome

    Time frame: 12 months after total knee replacement surgery

Secondary outcomes

  1. homogeneity of variance in the Oxford Knee Score

    Time frame: 12 months after the surgery

  2. Oxford Knee Score

    difference between groups

    Time frame: 3 months after the surgery

  3. Oxford Knee Score

    difference between groups

    Time frame: 6 months after the surgery

  4. Oxford Knee Score

    difference between groups

    Time frame: 12 months after the surgery

  5. EQ-5D-5L

    difference in quality of life

    Time frame: 3 months after the surgery

  6. EQ-5D-5L

    difference in quality of life

    Time frame: 6 months after the surgery

  7. EQ-5D-5L

    difference in quality of life

    Time frame: 12 months after the surgery

  8. Forgotten Joint Score 12 (FJS-12)

    Time frame: 3 months after the surgery

  9. Forgotten Joint Score 12 (FJS-12)

    Time frame: 6 months after the surgery

  10. Forgotten Joint Score 12 (FJS-12)

    Time frame: 12 months after the surgery

  11. pain at rest using the visual analoque (VAS scale)

    Time frame: 3 months after surgery

  12. pain at rest using the visual analoque (VAS scale)

    Time frame: 6 months after surgery

  13. pain at rest using the visual analoque (VAS scale)

    Time frame: 12 months after surgery

  14. pain while walking using the visual analoque (VAS scale)

    Time frame: 3 months after surgery

  15. pain while walking using the visual analoque (VAS scale)

    Time frame: 6 months after surgery

  16. pain while walking using the visual analoque (VAS scale)

    Time frame: 12 months after surgery

  17. active knee range of motion

    Time frame: 3 months after surgery

  18. active knee range of motion

    Time frame: 12 months after surgery

  19. passive knee range of motion

    Time frame: 3 months after surgery

  20. passive knee range of motion

    Time frame: 12 months after surgery

  21. The patient satisfaction VAS

    Time frame: 12 months after surgery

  22. patient accepted symptom state questions

    Time frame: 12 months after surgery

Other outcomes

  1. the visits to the emergency department

    Time frame: during the 12-month follow-up after surgery

  2. the readmissions to Coxa Hospital

    Time frame: during the 12-month follow-up after surgery

  3. The rate of manipulation under anesthesia

    Time frame: during the 12-month follow-up after surgery

  4. complications

    Time frame: during the 12-month follow-up after surgery

07

Study locations

1 of 1 sites recruiting
  • Coxa Hospital for Joint Replacement
    Tampere, Pirkanmaa 33520, Finland
    Recruiting
08

References and documents

Individual participant data

Plan to share: Undecided — We will share IPD against well-planned research protocol.

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Nov 2022 (actual). Primary completion is estimated for Dec 2026, 49 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 26, 2022
First posted
Oct 31, 2022
StartActual
Nov 2, 2022
Primary completionEst.
Dec 2026
CompletionEst.
Dec 2027
Last update
Nov 14, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Nov 14, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05599776
Lead sponsor
Coxa, Hospital for Joint Replacement
Responsible party
Sponsor
First posted
Oct 31, 2022
Start date
Nov 2, 2022
Primary completion
Dec 2026 (estimated)
Completion
Dec 2027 (estimated)
Last update
Nov 14, 2022

Study contacts

Aleksi Reito, MD, PhD
Contact
aleksi.reito@pshp.fi
+358444729631
Elisa Leinonen, RN
Contact
elisa.leinonen@coxa.fi
+358331178030
Aleksi Reito, MD, PhD
principal investigator · Coxa, Hospital for Joint Replacement

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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