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CompletedNCT03846791HELLOUpdated Aug 13, 2024

An Evaluation of Health Outcomes for Mako Hip Replacement

An observational study in Osteoarthritis, Hip, sponsored by Bournemouth University. Completed at 2 sites in United Kingdom. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-08-13.

Sponsored by Bournemouth University · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
200
Ages
18 Years and older
Sex
All
01

Study summary

To assess clinical outcomes and surgery related resource use in the year post surgery for patients undergoing hip replacement using the Mako Robo

Read the detailed description

This is an observational cohort study. It evaluates the recovery of 200 patients who are having routine robotic hip replacement surgery at a Nuffield Hospital in Bournemouth. Any complications from the surgery, or readmissions to hospital, will be reported. Investigators will measure how accurately the surgeon, assisted by the robotic-arm, positions the hip implant during the surgery using x-rays taken as part of routine care. The study also monitors the progress of rehabilitation by assessing pain and functional ability in the year following surgery, and will investigate whether there is an association between this recovery and a measurement of an area of muscle in the pelvic region, taken from a routine CT scan.

Patients will be asked to come to the Orthopaedic Research Institute at Bournemouth University to be assessed before they have surgery, and again at 3 weeks, 6-8 weeks, 3 months, 6 months and 12 months following surgery. At these visits they will be asked about their pain, how well they can do daily activities, and their quality of life. They will be assessed on their ability to sit-to-stand five times, walk for 40m, and climb some stairs. At each visit, except the three weeks visit, they will also have their gait tested on a specialised clinical treadmill, and the muscle strength in their legs measured. They will also be measured for oedema at baseline, 3 weeks and 6-8 weeks using a Fit3D ProScanner. These visits are in addition to the routine clinical follow-up visits at Nuffield Hospital. Participants will also be invited to wear a wrist activity monitor for at least three consecutive days prior to surgery and for the 6 weeks following discharge so that their activity can be recorded.

Surgery-related resource use of the procedure will also be reported, such as length of hospital stay, time in theatre, unplanned hospital visits, non-routine medication, outpatient appointments and physiotherapy appointments.

02

Conditions studied

  • Osteoarthritis, Hip

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03

In context

Osteoarthritis, Hip

628 studies on the registry are indexed under Osteoarthritis, Hip; 121 are open to participants now.

This study's enrollment of 200 is above the median of 141 across 154 observational studies indexed under Osteoarthritis, Hip.

Browse Osteoarthritis, Hip studies →

Lead sponsor

Bournemouth University is the lead sponsor of 52 studies on the registry; 10 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Patients undergoing Robot Assisted Total Hip Replacement at the Nuffield Health

Inclusion criteria

  • Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis, suitable for unilateral primary hip replacement;
  • Rheumatoid arthritis;
  • Correction of functional deformity;
  • Voluntary written Informed Consent obtained.
  • Participant able to complete study follow-up.

Exclusion criteria

Exclusion Criteria:

  • Prospect for recovery to independent mobility compromised by known coexistent medical problems;
  • Requiring revision hip replacement;
  • Previous hip replacement (resurfacing or THR) on the contralateral side, with outcome achieving an Oxford Hip score \<18 points;
  • Likely post-operative leg length inequality >5cm;
  • Neuromuscular disease affecting hip (Parkinson's, cerebral palsy, other spasticity);
  • Primary or metastatic tumor involving this hip;
  • Loss of abductor musculature, poor bone stock, or poor skin coverage around the hip joint;
  • Previous arthrodesis or excision arthroplasty
  • Acetabular deficiency - >2cm superior loss acetabular dome or >1.5cm protrusion acetabulae or wall deficiency> half a wall;
  • Dysplasia (DDH) with >2.5cm subluxation or complete dislocation;
  • Body mass index > 40kg/m2;
  • Active or previous or suspected infection in this hip;
  • Sepsis or osteomyelitis;
  • Known sensitivity to device materials;
  • Not physically able to use Grail gait lab and Primus muscle testing equipment;
  • Women judged by the Investigator to be of childbearing potential who are pregnant, nursing, or planning to become pregnant, and those who do not agree to remain on an acceptable method of birth control throughout the entire study period;
  • Unable to provide informed consent (insufficient English, cognitive disorder such as dementia, psychiatric illness);
  • Unable to complete follow-ups (life expectancy \<5 years, insufficient English, lives overseas, unable to return easily).
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
200 participants (actual)
Patient registry
No

Interventions

  • OtherObservational Study Post MAKO Robotic Surgery

    To assess clinical outcomes and surgery related resource use in the year post surgery for patients undergoing hip replacement surgery using the MAKO robot

06

What researchers measure

Primary outcomes

  1. The measurement of surgical complications post surgery

    This study's primary outcome is to report on surgical complications. Events will be sub-classified as device (prosthesis or robot) or surgeon related.

    Time frame: 1 Year post surgery

  2. The measurement of readmission post surgery

    This study's primary outcome is to report on surgical complications. Events will be sub-classified as device (prosthesis or robot) or surgeon related.

    Time frame: 1 Year post surgery

Secondary outcomes

  1. Accuracy of component positioning

    Placement of prosthetic components will be evaluated by assessing radiographs

    Time frame: 1 Year post surgery

  2. Functional Assessments - Chair stand

    30 s Chair Stand test as recommended by the Osteoarthritis Research Society International (OARSI). Assessment will be done prior to surgery, and again at 3 weeks, 6-8 weeks, 3 months, 6 months and 1 year following surgery

    Time frame: 1 Year post surgery

  3. Functional Assessments - Fast paced Walk

    40m fast-paced walk test as recommended by the Osteoarthritis Research Society International (OARSI). Assessment will be done prior to surgery, and again at 3 weeks, 6-8 weeks, 3 months, 6 months and 1 year following surgery

    Time frame: 1 Year post surgery

  4. Functional Assessments - Stair Climb

    Stair climb test as recommended by the Osteoarthritis Research Society International (OARSI). Assessment will be done prior to surgery, and again at 3 weeks, 6-8 weeks, 3 months, 6 months and 1 year following surgery

    Time frame: 1 Year post surgery

  5. Gait analysis

    Participants' gait will be analysed using the GRAIL MotekForce at baseline, 6-8 weeks, 3 months, 6 months and 1 year following surgery.

    Time frame: 1 Year post surgery

  6. Muscle Testing

    Participants' muscle strength will be analysed using the Primus BTE at baseline, 6-8 weeks, 3 months, 6 months and 1 year following surgery.

    Time frame: 1 Year post surgery

  7. Measurement of pre-operative psoas muscle mass

    This measurement will be taken from the pre-surgery CT scan

    Time frame: Pre-Operative

  8. Patient Reported Outcome Measures - EQ-5D Quality of Life Score

    EQ-5D Quality of Life Score will be assessed at pre-surgery and at 6 months.

    Time frame: 6 Months post surgery

  9. Patient Reported Outcome Measures - The Pain Catastrophizing Score (PCS)

    The Pain Catastrophizing Score (PCS) will be assessed prior to surgery.

    Time frame: Pre-Operative

  10. Patient Reported Outcome Measures - The Hip Disability and Osteoarthritis Outcome Score (HOOS)

    The Hip Disability and Osteoarthritis Outcome Score (HOOS) will be assessed at pre-surgery, 3 weeks, 6-8 weeks, 3 month, 6 months and 1 year following surgery

    Time frame: 1 Year post surgery

  11. Surgery related resource use - length of stay in hospital

    Data will be reported on surgery-related use of resources for length of stay in hospital

    Time frame: 1 Year post surgery

  12. Surgery related resource use - time in theatre

    Data will be reported on surgery-related use of resources for time in theatre

    Time frame: 1 Year post surgery

  13. Surgery related resource use - unplanned hospital visits

    Data will be reported on surgery-related use of resources for unplanned hospital visits

    Time frame: 1 Year post surgery

  14. Surgery related resource use - non-routine medication

    Data will be reported on surgery-related use of resources for non-routine medication

    Time frame: 1 Year post surgery

  15. Surgery related resource use - number of outpatient appointments

    Data will be reported on surgery-related use of resources for number of outpatient appointments

    Time frame: 1 Year post surgery

  16. Surgery related resource use - number of physiotherapy appointments

    Data will be reported on surgery-related use of resources for number of physiotherapy appointments.

    Time frame: 1 Year post surgery

  17. Monitoring of physical activity

    Participants will be invited to wear an activity monitor on their wrist for at least three consecutive days prior to surgery, and for the 6-8 weeks following discharge

    Time frame: 6-8 weeks following surgery

  18. Measurement of oedema

    Participants will be assessed for oedema using a Fit3D ProScanner at baseline, 3 weeks and 6-8 weeks following surgery.

    Time frame: 6-8 weeks following surgery

07

Study locations

2 sites
  • Nuffield Health Bournemouth
    Bournemouth, BH1 1RW, United Kingdom
  • Orthopaedic Research Institute Bournemouth University
    Bournemouth, BH8 8FT, United Kingdom
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 13, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03846791
Lead sponsor
Bournemouth University
Collaborators
Nuffield Health Bournemouth, Orthopaedic Research Institute, Stryker Orthopaedics
Responsible party
Sponsor
First posted
Feb 20, 2019
Start date
Jul 15, 2019
Primary completion
May 3, 2024
Completion
May 3, 2024
Last update
Aug 13, 2024

Study contacts

Tom Wainwright
study director · Professor

Oversight

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

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This study is completed, as verified in Aug 2024. You cannot join it, but the record below documents what was studied.

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