Arthroplasty, Replacement, Hip, Hip Replacement, Total
Conditions
Brief summary
The purpose of this study is to find out whether placing a pillow between the legs during hip surgery will result in a better aligned hip replacement.
Detailed description
During hip replacement surgery the cup is placed on specific planned angles. Cup placement has an effect on the patients' pain-free range of movement, dislocation rates and satisfaction. However, the angles of the cup orientation (i.e. the tilt and rotation), which are preoperatively planned and postoperatively measured on radiographs, have a high variability even when an experienced surgeon is performing the surgery. One of the reasons this occurs is because the operated leg can move the pelvis to a different position in the time between set-up and actual implantation which may lead to the cup being placed in a non-optimal position. This study aims to see if the difference between planned and achieved cup angles and pelvic movement can be lessened by putting a pillow in between the legs to keep it in a stable horizontal position.
Interventions
PROCEDUREPillow
A pillow to lessen the angle differences between hips so that the acetabular component can be placed in an optimal position.
Sponsors
Ottawa Hospital Research Institute
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patient awaiting primary total hip arthroplasty using a posterior approach in a lateral decubitus position * Patients capable of reading, understanding, and willing to sign the informed consent form
Exclusion criteria
* Total hip arthroplasty not using a posterior approach in a lateral decubitus position * Prior hip osteotomy or fracture osteosynthesis on the index hip
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in radiographic cup inclination angle | Intra-operatively and post-operatively (within one month after the surgery) | The difference between the operative and postoperative radiographic cup inclination angle |
Countries
Canada
Contacts
Primary ContactJohanna Dobransky, MHK, BSc, CCRP
Backup ContactMeaghan Dufresne
Outcome results
None listed