van Duren, BH orcid.org/0000-0003-1877-8227, Al Ashqar, M, Lamb, JN orcid.org/0000-0002-0166-9406 et al. (2 more authors) (2020) A Novel mechanical inclinometer device to measure acetabular cup inclination in total hip arthroplasty. Journal of Medical Engineering and Technology, 44 (8). pp. 481-488. ISSN 0309-1902
Abstract
It is well recognised that acetabular cup orientation influences patient function and implant survival post-THR. Reliable intra-operative determination of cup orientation remains a challenge. We describe the design and testing of a novel mechanical inclinometer to measure intra-operative acetabular cup inclination. The aim was to design a generic inclinometer to measure acetabular inclination to within + 5° without requiring modification to existing instrumentation while remaining easy to handle, robust/reusable, and sterilizable. The device was drafted using CAD software, prototyped using a 3D printer and constructed using stainless steel. Two experiments were undertaken to test accuracy: (1) the absolute accuracy was tested; (2) placement of an acetabular component using the device was compared to a freehand technique using a sawbone pelvis. 18 surgeons were asked to place an uncemented acetabular cup in a saw bone pelvis to a target of 40°. The average root-mean-square error was 1.1° (SD: 0.9°). Comparison showed that with the freehand component placement 50% of the surgeons were outside the specified range (35°–45°) where all participants achieved placement within range when using the inclinometer. This work demonstrates that the design and initial testing of a mechanical inclinometer which is suitable for use in determining the acetabular cup inclination in THR.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 Informa UK Limited, trading as Taylor & Francis Group. This is an author produced version of a journal article published in Journal of Medical Engineering and Technology. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Acetabular component inclination, total hip replacement, THR, inclinometer |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Institute of Rheumatology & Musculoskeletal Medicine (LIRMM) (Leeds) > Orthopaedics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Oct 2020 14:25 |
Last Modified: | 29 Oct 2021 00:38 |
Status: | Published |
Publisher: | Taylor & Francis |
Identification Number: | 10.1080/03091902.2020.1825846 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:166343 |