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Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery?
Aims This study aims to compare the leg length correction (LLC) measured intra-operatively using the Vertical Measurement SystemTM (VMS) in total hip arthroplasty (THA), with the LLC measured on a 6-week post-operative Xray. We also wanted to quantify any residual leg length discrepancy (LLD) using...
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| Format: | Thesis |
| Language: | English |
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Division of General Surgery
2021
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| _version_ | 1867613340694478848 |
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| access_status_str | Open Access |
| author | Moonda, Zaheer |
| author2 | Nortjie, Marc |
| author_browse | Moonda, Zaheer Nortjie, Marc |
| author_facet | Nortjie, Marc Moonda, Zaheer |
| author_sort | Moonda, Zaheer |
| collection | Thesis |
| description | Aims This study aims to compare the leg length correction (LLC) measured intra-operatively using the Vertical Measurement SystemTM (VMS) in total hip arthroplasty (THA), with the LLC measured on a 6-week post-operative Xray. We also wanted to quantify any residual leg length discrepancy (LLD) using this method. Patients and Methods A prospective cohort study was conducted, in which patients undergoing primary THA were enrolled at two centres in Cape Town, over a period of 19 weeks. THA's were performed by four surgeons. Pre-operative leg length discrepancy measurements were obtained in 92 patients. The VMS was used to predict intra-operative leg length correction (LLC), and this measurement was compared to the post-operative leg length correction measured on the 6-week follow-up X-ray. These measurements were statistically compared using Mann-Whitney U Test. Results The difference between the intra-operative VMS calculation and the 6-week radiological measurement was not significant (p>0.05), with the difference in their mean values being 0.07 ± 3.26mm. In the cohort, 81.52% of the patients (n=75) were within 5mm of the target LLC, and 95.65% of patients (n=88) were within 10mm of the target LLC. The mean absolute residual LLD at 6 weeks was 3.22 ± 3.13mm. Conclusion The intra operative LLC measurement obtained using the VMS accurately predicts the 6-week post op radiographic LLC measurement. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/33852 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:33.896Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Division of General Surgery |
| publisherStr | Division of General Surgery |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/33852 Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery? Moonda, Zaheer Nortjie, Marc Orthopaedic Surgery Aims This study aims to compare the leg length correction (LLC) measured intra-operatively using the Vertical Measurement SystemTM (VMS) in total hip arthroplasty (THA), with the LLC measured on a 6-week post-operative Xray. We also wanted to quantify any residual leg length discrepancy (LLD) using this method. Patients and Methods A prospective cohort study was conducted, in which patients undergoing primary THA were enrolled at two centres in Cape Town, over a period of 19 weeks. THA's were performed by four surgeons. Pre-operative leg length discrepancy measurements were obtained in 92 patients. The VMS was used to predict intra-operative leg length correction (LLC), and this measurement was compared to the post-operative leg length correction measured on the 6-week follow-up X-ray. These measurements were statistically compared using Mann-Whitney U Test. Results The difference between the intra-operative VMS calculation and the 6-week radiological measurement was not significant (p>0.05), with the difference in their mean values being 0.07 ± 3.26mm. In the cohort, 81.52% of the patients (n=75) were within 5mm of the target LLC, and 95.65% of patients (n=88) were within 10mm of the target LLC. The mean absolute residual LLD at 6 weeks was 3.22 ± 3.13mm. Conclusion The intra operative LLC measurement obtained using the VMS accurately predicts the 6-week post op radiographic LLC measurement. 2021-09-13T04:59:24Z 2021-09-13T04:59:24Z 2021 2021-09-10T10:49:22Z Master Thesis Masters MMed http://hdl.handle.net/11427/33852 eng application/pdf Division of General Surgery Faculty of Health Sciences |
| spellingShingle | Orthopaedic Surgery Moonda, Zaheer Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery? |
| thesis_degree_str | Master's |
| title | Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery? |
| title_full | Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery? |
| title_fullStr | Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery? |
| title_full_unstemmed | Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery? |
| title_short | Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery? |
| title_sort | does the intra operatively measured leg length correction compare to the post operative radiograph in total hip replacement surgery |
| topic | Orthopaedic Surgery |
| url | http://hdl.handle.net/11427/33852 |
| work_keys_str_mv | AT moondazaheer doestheintraoperativelymeasuredleglengthcorrectioncomparetothepostoperativeradiographintotalhipreplacementsurgery |