Pillow Use During Total Hip Arthroplasty
Study Details
Study Description
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.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
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.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Pillow Group There will be a pillow placed between the patients legs during their operation. |
Procedure: Pillow
A pillow to lessen the angle differences between hips so that the acetabular component can be placed in an optimal position.
|
| No Intervention: Control Group They will receive a normal total hip arthroplasty. |
Outcome Measures
Primary Outcome Measures
- 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
Eligibility Criteria
Criteria
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
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | The Ottawa Hospital | Ottawa | Ontario | Canada | K1H 8L6 |
Sponsors and Collaborators
- Ottawa Hospital Research Institute
Investigators
- Principal Investigator: George Grammatopoulos, MBBS BSc FRCS DPhil, The Ottawa Hospital Research Institute
Study Documents (Full-Text)
None provided.More Information
Publications
- D'Lima DD, Urquhart AG, Buehler KO, Walker RH, Colwell CW Jr. The effect of the orientation of the acetabular and femoral components on the range of motion of the hip at different head-neck ratios. J Bone Joint Surg Am. 2000 Mar;82(3):315-21.
- Fujishiro T, Hiranaka T, Hashimoto S, Hayashi S, Kurosaka M, Kanno T, Masuda T. The effect of acetabular and femoral component version on dislocation in primary total hip arthroplasty. Int Orthop. 2016 Apr;40(4):697-702. doi: 10.1007/s00264-015-2924-2. Epub 2015 Jul 23.
- Grammatopoulos G, Pandit HG, da Assunção R, Taylor A, McLardy-Smith P, De Smet KA, Murray DW, Gill HS. Pelvic position and movement during hip replacement. Bone Joint J. 2014 Jul;96-B(7):876-83. doi: 10.1302/0301-620X.96B7.32107.
- Grammatopoulos G, Thomas GE, Pandit H, Beard DJ, Gill HS, Murray DW. The effect of orientation of the acetabular component on outcome following total hip arthroplasty with small diameter hard-on-soft bearings. Bone Joint J. 2015 Feb;97-B(2):164-72. doi: 10.1302/0301-620X.97B2.34294.
- Kennedy JG, Rogers WB, Soffe KE, Sullivan RJ, Griffen DG, Sheehan LJ. Effect of acetabular component orientation on recurrent dislocation, pelvic osteolysis, polyethylene wear, and component migration. J Arthroplasty. 1998 Aug;13(5):530-4.
- Langton DJ, Sprowson AP, Mahadeva D, Bhatnagar S, Holland JP, Nargol AV. Cup anteversion in hip resurfacing: validation of EBRA and the presentation of a simple clinical grading system. J Arthroplasty. 2010 Jun;25(4):607-13. doi: 10.1016/j.arth.2009.08.020. Epub 2009 Dec 21.
- Meermans G, Goetheer-Smits I, Lim RF, Van Doorn WJ, Kats J. The difference between the radiographic and the operative angle of inclination of the acetabular component in total hip arthroplasty: use of a digital protractor and the circumference of the hip to improve orientation. Bone Joint J. 2015 May;97-B(5):603-10. doi: 10.1302/0301-620X.97B5.34781.
- Ozaki Y, Baba T, Homma Y, Ochi H, Watari T, Banno S, Matsumoto M, Kaneko K. Posterior versus direct anterior approach in total hip arthroplasty: difference in patient-reported outcomes measured with the Forgotten Joint Score-12. SICOT J. 2018;4:54. doi: 10.1051/sicotj/2018051. Epub 2016 Nov 27.
- Widmer KH. [Impingement Free Motion in Total Hip Arthroplasty - How Can We Implement It?]. Z Orthop Unfall. 2016 Aug;154(4):392-7. doi: 10.1055/s-0042-108065. Epub 2016 Jun 23. German.
- Wright JG. Small Simple Trials: A Strategy for Orthopaedic Randomized Trials. J Bone Joint Surg Am. 2018 Jul 18;100(14):e95. doi: 10.2106/JBJS.17.01107.
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