Outcomes in patients with osteoarthritis treated with minimally invasive surgery vs a conventional posterior approach in total hip arthroplasty (hip replacement)

ISRCTN ISRCTN63687167
DOI https://doi.org/10.1186/ISRCTN63687167
Secondary identifying numbers 10-2017
Submission date
10/05/2020
Registration date
13/05/2020
Last edited
18/05/2020
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Musculoskeletal Diseases
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Background and study aims
A hip replacement (hip arthroplasty) is a common type of surgery where a damaged hip joint is replaced with an artificial one (known as an implant).
The purpose of this study was to compare the functional outcome, perioperative parameters and complications of minimal invasive surgery (SuperPath) to the conventional posterior technique during a follow up period of 6-12 months. These parameters are important, because of rising attention in orthopedic surgery for minimal invasive techniques, despite the ongoing uncertainty about the benefits of MIS.

Who can participate?
Adults over 18 years, with osteoarthritis severe enough to warrant total hip replacement.

What does the study involve?
This study reports the results of a prospective double-blinded randomized controlled trial of patients with primary hip osteoarthritis. The surgery was performed in a single center by one senior orthopaedic chief surgeon, who has elaborate prior experience in hip surgery. Between October 2017 and February 2019, 60 patients who suffered from radiographically confirmed hip osteoarthritis were divided into two groups and treated according to allocation. Treatment consisted of either a minimal invasive surgery approach or a conventional posterior approach. Peri-operative parameters were collected and compared. Questionnaires (harris hip score and Hip disability and osteoarthritis outcome score) to measure functional outcome were taken 6 weeks and up to 6 months postoperative.

What are the possible benefits and risks of participating?
Benefits: contributing to science
Risks: Regular risks of total hip arthroplasty (infection, blood clots, fracture,...)

Where is the study run from?
AZ Rivierenland (Belgium)

When is the study starting and how long is it expected to run for?
October 2017 to August 2019

Who is funding the study?
investigator initiated and funded

Who is the main contact?
Wouter Schroven, wouter.schroven@student.kuleuven.be

Contact information

Mr Wouter Schroven
Public

Weyneshoflei 23
Bonheiden
2820
Belgium

ORCiD logoORCID ID 0000-0001-6106-2801
Phone +32 477829556
Email wouter.schroven@student.kuleuven.be
Mr Wouter Schroven
Scientific

Weyneshoflei 23
Bonheiden
2820
Belgium

ORCiD logoORCID ID 0000-0001-6106-2801
Phone +32 477829556
Email wouter.schroven@student.kuleuven.be

Study information

Study designProspective single-centered double-blinded randomized controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Hospital
Study typeTreatment
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific titleFunctional and radiographic outcomes after Superpath minimally invasive approach vs conventional posterior approach in total hip arthroplasty: a randomized controlled trial
Study objectivesThe clinical outcome of the superpath technique is equally good as the clinical outcome of the posterolateral approach
Ethics approval(s)Approved 20/10/2017, Ethics committee Az Rivierenland (Kasteelstraat 23, 2880, Bornem, Belgium; +32 (0)3 890 16 64; Dr.Van.Landuyt@sjk.be), ref: none provided
Health condition(s) or problem(s) studiedTotal hip arthroplasty
InterventionPatients presenting with primary hip osteoarthritis and requiring arthroplasty will be randomized to one of two groups. Randomization will be done using a random number generator and sealed envelopes. Patients will not be aware of which type of approach they will receive.
Group 1 will receive the supercapsular percutaneously-assisted total hip surgery SuperPath), a minimally invasive approach.
Group 2 will be treated with a conventional posterior approach (Moore).
Prior to surgery, every patient will be broadly informed about the course of the study, the possible risks and the right to withdraw at any moment.
Harris hip score and Hip disability and osteoarthritis outcome score will be examined pre-operative, 6 weeks postoperative and up to 6 months postoperative. Perioperative parameters (Hb, operation time, length of stay, NRS-score) will also be investigated.
One day after surgery, a routine X-ray will be taken to measure prosthesis positioning. During data collection, the investigators will be blinded for the type of surgery that was administered.
Intervention typeProcedure/Surgery
Primary outcome measureHarris hip score and Hip disability and osteoarthritis outcome score at baseline, 6 weeks and up to 6 months postoperatively
Secondary outcome measures1. Radiograpic prosthesis positioning (cup abduction angle, stem alignment) measured using X-ray one day after operation
2. Perioperative parameters (Hb, transfusion rate, length of stay, NRS score, operation time) at the time of operation
Overall study start date01/10/2017
Completion date01/08/2019

Eligibility

Participant type(s)Patient
Age groupAdult
SexBoth
Target number of participants60
Key inclusion criteriaSymptomatic primary osteoarthritis severe enough to warrant total hip arthroplasty
Key exclusion criteria1. Femoral neck fracture
2. Acetabulum fracture
Date of first enrolment15/10/2017
Date of final enrolment01/02/2019

Locations

Countries of recruitment

  • Belgium

Study participating centre

AZ Rivierenland
Kasteelstraat 23
Bornem
2880
Belgium

Sponsor information

AZ Rivierenland
Hospital/treatment centre

Kasteelstraat 23
Bornem
2880
Belgium

Phone +32 (0)3 890 16 64
Email info@azr.be
Website https://www.azrivierenland.be

Funders

Funder type

Other

investigator initiated and funded

No information available

Results and Publications

Intention to publish date01/06/2020
Individual participant data (IPD) Intention to shareYes
IPD sharing plan summaryAvailable on request
Publication and dissemination planThe manuscript is intended to be published in a peer reviewed journal. The trial results, as well as an overview of the statistical analysis, will be published in the journal.
IPD sharing planThe datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request. Wouter Schroven, Schrovenwouter@hotmail.com, all data relevant for research documented available from 11/05/2020. The data is documented in an Excel-file and available upon request. Participants were informed and consent was given to share anonymized data, framed in professional secrecy.

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Protocol file 18/05/2020 No No

Additional files

ISRCTN63687167_PROTOCOL.pdf
uploaded 18/05/2020

Editorial Notes

18/05/2020: Uploaded protocol (not peer reviewed) as an additional file.
13/05/2020: Trial’s existence confirmed by Ethics committee Az Rivierenland