Evaluation of pelvic position in total hip replacement
Research type
Research Study
Full title
Evaluation of pelvic position in total hip replacement using transverse pelvic lines
IRAS ID
146380
Contact name
David Beverland
Contact email
Sponsor organisation
Belfast Health & Social Care Trust
Clinicaltrials.gov Identifier
14/NE/1163,
Duration of Study in the UK
0 years, 11 months, 31 days
Research summary
During a Total Hip Replacement (THR) when the patient is lying on the operating table the surgeon assumes that the pelvis is in a fixed neutral position. In reality it is probably not due to improper placement of the patient on the surgical table, movement during the operation and the anthropometrics of the patient. This can negatively effect the orientation that the new hip components are implanted which can lead to dislocation, impingement, leg length discrepancies, joint instability and increased component wear. The purpose of this study is to determine the degree of pelvic movement that a patient might experience during a THR. Both pre-operative hip patients and control subjects who have never had a THR will be assessed. Horizontal lines will be drawn on each participant’s lower back when sitting, movement of which when lying would indicate a change in the position of the pelvis.
The first stage of this study is to confirm the use of these lines as a means of monitoring pelvic position. This involves firstly asking the participant to stand on a block whilst keeping their other leg on the ground and vice versa then asking the participant to slide one hand down their side, with both feet on the ground, and the same for the other side. The second stage of the study will involve the subject lying on their side on the table on three different types of surface with and without the use of standard hip supports. Photographs will be taken during all tasks to monitor the position of the lines in each scenario. This study will indicate the degree of movement a pelvis may undergo during a THR. This will aid the surgeon in better placement of the new hip components, helping to reduce negative side effects for the patient.REC name
North East - Newcastle & North Tyneside 2 Research Ethics Committee
REC reference
14/NE/1163
Date of REC Opinion
2 Oct 2014
REC opinion
Favourable Opinion