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Taking people in FinlandNo phase

Changes in Physical Activity, Sleep and Knee Function After Same-Day Discharge Knee Arthroplasty

Key facts

Who runs it
Turku University Hospital
Where
Tampere and Turku, FinlandSee the 2 sites
Trial code
Status
Recruiting
People taking part
120 people, planned
Started
1 Aug 2025
Expected to end
Feb 2029
Type of study
Observational, 2 groups
Treatments tested
  • Medial unicompartmental knee arthroplasty (UKA)
  • Total knee arthroplasty (TKA)
Record updated
25 September 2026

Who can take part

Age
Up to 80 years
Sex
Women and men
Healthy volunteers
Cannot take part

The registry criteria, word for word

Show all 19 criteriaShow less

Who can take part

  • Primary knee osteoarthritis: medial or lateral Kellgren Lawrence grade 3-4 for TKA and antero-medial grade 3-4 for UKA; Patient criteria for outpatient knee arthroplasty (UKA or TKA):
  • Full overnight support by an adult at home after discharge
  • At most mild, well-controlled, comorbidities (e.g. hypertension, hypothyroidism, epilepsy, asthma)
  • ASA-class 1-2
  • Age <80 years
  • BMI <35 kg/m2

Who cannot take part

  • Antithrombotic therapy (e.g. Xarelto, Pradaxa, Plavix or ASA for secondary prevention)
  • Neurological disorder aVecting walking or muscle strength
  • History of cardiac or cerebrovascular events
  • Conditions affecting consciousness (e.g. syncope of cardiac origin)
  • Heart failure
  • Diabetes mellitus type 1
  • Cognitive impairment or dementia
  • History of substance abuse
  • Chronic strong opioid therapy or severe pain disorder
  • History of venous thromboembolism or known coagulopathy
  • Post-traumatic osteoarthritis
  • Inability or unwillingness to use a smartphone or to participate in the study
  • Untreated or central sleep apnoea

Where in Finland

  • The UKK Institute for Health Promotion ResearchTampere, FinlandContact: Tommi Vasankari, Title of DocentTaking people
  • Turku University HospitalTurku, FinlandContact: Matias Hemmilä, Ph.D.Taking people

About the trial

What the trial wants to find out

The goal of this observational study is to examine changes in physical activity, sleep quality, knee extension and flexion strength, knee range of motion, and patient-reported outcomes before and after same-day discharge knee arthroplasty (SDD-KA). The study will also investigate whether these changes are associated with each other and with patient satisfaction. As a prespecified secondary aim, researchers will compare these outcomes between patients undergoing medial unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA).

Read full original descriptionShow less

The main questions it aims to answer are:

* How do physical activity, sleep quality, knee extension and flexion strength, knee range of motion, and patient-reported outcomes change following SDD-KA? * Are changes in these outcomes associated with each other and with patient satisfaction? * Are these outcomes different between patients undergoing medial UKA and TKA?

Participants will:

* Wear an accelerometer to measure physical activity and sleep before surgery, continuously from surgery to 3 months after surgery, and again for 2 weeks at 12 months after surgery * Complete questionnaires about knee function, sleep quality, pain, health-related quality of life, and satisfaction with surgery * Have knee muscle strength and active knee range of motion assessed before and 12 months after surgery * Attend follow-up assessments during the 12-month postoperative period

The 2 groups in the trial

  • Medial unicompartmental knee arthroplasty (UKA)

    Patients undergoing primary same-day discharge medial unicompartmental knee arthroplasty (UKA) for knee osteoarthritis. The medial UKA group will include 30 participants. The surgical procedure is determined by the treating clinical team according to established clinical indications and is not assigned by the study.

  • Total Knee Arthroplasty (TKA)

    Patients undergoing primary same-day discharge total knee arthroplasty (TKA) for knee osteoarthritis. The TKA group will include 90 participants. The surgical procedure is determined by the treating clinical team according to established clinical indications and is not assigned by the study.

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

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Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
ORTOMOVE: Protocol for a Prospective Cohort Study Comparing Physical Activity, Sleep Quality and Patient-reported Outcomes Following Same- Day Discharge Knee Arthroplasty
Record updated
25 September 2026