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Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_7 | Pages 34 - 34
1 Jul 2022
Abram S Sabah S Alvand A Price A
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Abstract

Introduction

The objective of this study was to determine rates of serious adverse events in patients undergoing revision knee arthroplasty with consideration of the indication for revision and compare these with primary knee arthroplasty.

Methodology

Primary and revision arthroplasty procedures were identified in the national Hospital Episode Statistics and were linked by patient and side. A logistic regression model was used to investigate factors associated with 90-day mortality (primary outcome) and secondary serious adverse outcomes. Urgent indications for revision arthroplasty were defined as infection or fracture; other indications (e.g. loosening, instability, wear) were included in the elective cohort.


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_7 | Pages 63 - 63
1 Jul 2022
Sabah S Fritsch LV Price A Alvand A
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Abstract

Introduction

A revision knee replacement (rKR) network model has been introduced in the UK to improve clinical outcomes for patients and reduce healthcare costs. However, the current practice of different types of surgical unit is not well understood. The aim of this study was to answer: “How complex are rKR cases at a Major Revision Centre (MRC)?”

Methodology

Retrospective cohort study at the Nuffield Orthopaedic Centre, Oxford from 2015 - 2018. Case complexity was classified using the Revision Knee Complexity Classification (RKCC). Referral source, technical details of surgery and hospital admission impact were recorded.


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_7 | Pages 77 - 77
1 Jul 2022
Sabah S Sina J Alvand A Beard D Price A
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Abstract

Introduction

Anxiety and depression are risk factors for poor outcome following knee replacement surgery. The aim of this study was to investigate the prevalence of anxiety and depression before and after primary (pKR) and revision knee replacement (rKR).

Methodology

Retrospective cohort study. 315,720 pKR and 12,727 rKR recruited from the NHS Patient Reported Outcome Measures (PROMs) programme from 2013–2021. Anxiety and depression were defined using: (i) Survey question: “Have you been told by a doctor that you have depression? Yes/No”; (ii) EQ-5D anxiety/depression domain. Rates of EQ-5D anxiety/depression were investigated at baseline and at 6-months following surgery. The prevalence of depression was investigated by patient age and gender.


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_7 | Pages 79 - 79
1 Jul 2022
Fritsch LV Sabah S Xu J Jackson W Merle C Price A Alvand A
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Abstract

Introduction

Re-revision knee replacement (RR-KR) is complex surgery, with a significant impact on individual patients and health resource use. The aim of this study was to investigate early patient-relevant outcomes following RR-KR.

Methodology:

206 patients (250 knees) undergoing RR-KR were recruited from a major revision centre between 2015–2018. Patient-relevant outcomes assessed were: implant survivorship, complications (90-days), joint function and quality of life (final follow-up). Risk factors for further revision surgery at 1 year were investigated using multiple logistic regression.


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_7 | Pages 62 - 62
1 Jul 2022
Sabah S Knight R Alvand A Beard D Price A
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Abstract

Introduction

Our aim was to investigate trends in the incidence rate and main indication for revision knee replacement (rKR) over the past 15 years in the UK.

Methodology

Cross-sectional study from 2006 - 2020 using data from the National Joint Registry (NJR). Crude incidence rates were calculated using population statistics from the Office for National Statistics.


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_7 | Pages 37 - 37
1 Jul 2022
McCulloch R Palmer A Donaldson J Kendrick B Warren S Atkins B Alvand A Carrington R Taylor A Miles J
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Abstract

Aims

The primary aim of this study was to evaluate the outcomes of fungal knee periprosthetic joint infection following knee arthroplasty. The secondary aim was to evaluate risk factors for acquiring a fungal PJI.

Patients and Methods

This was a retrospective analysis of patients presenting with a confirmed fungal PJI of the knee in two tertiary centres. There were a total of 45 cases. Isolated fungal infections along with mixed bacterial and fungal infections were included. Mean follow up was 40 months (range 3–118).


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_7 | Pages 30 - 30
1 Jul 2022
Middleton R Jackson W Alvand A Bottomley N Price A
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Abstract

Background

Since 2012 we have routinely used the cementless Oxford medial unicompartmental knee arthroplasty (mUKA), with microplasty instrumentation, in patients with anteromedial osteoarthritis (AMOA) meeting modern indications. We report the 10-year survival of 1000 mUKA with minimum 4-year follow-up.

Methods

National Joint Registry (NJR) surgeon reports were interrogated for each senior author to identify the first 1,000 mUKAs performed for osteoarthritis. A minimum of 4 years follow-up was required. There was no loss to follow-up. The NJR status of each knee was established. For each mUKA revision the indication and mechanism of failure was determined using local patient records. The 10-year implant survival was calculated using life-table analysis.


The Bone & Joint Journal
Vol. 103-B, Issue 10 | Pages 1578 - 1585
1 Oct 2021
Abram SGF Sabah SA Alvand A Price AJ

Aims

To compare rates of serious adverse events in patients undergoing revision knee arthroplasty with consideration of the indication for revision (urgent versus elective indications), and compare these with primary arthroplasty and re-revision arthroplasty.

Methods

Patients undergoing primary knee arthroplasty were identified in the national Hospital Episode Statistics (HES) between 1 April 1997 to 31 March 2017. Subsequent revision and re-revision arthroplasty procedures in the same patients and same knee were identified. The primary outcome was 90-day mortality and a logistic regression model was used to investigate factors associated with 90-day mortality and secondary adverse outcomes, including infection (undergoing surgery), pulmonary embolism, myocardial infarction, and stroke. Urgent indications for revision arthroplasty were defined as infection or fracture, and all other indications (e.g. loosening, instability, wear) were included in the elective indications cohort.


The Bone & Joint Journal
Vol. 103-B, Issue 4 | Pages 627 - 634
1 Apr 2021
Sabah SA Alvand A Beard DJ Price AJ

Aims

To estimate the measurement properties for the Oxford Knee Score (OKS) in patients undergoing revision knee arthroplasty (responsiveness, minimal detectable change (MDC-90), minimal important change (MIC), minimal important difference (MID), internal consistency, construct validity, and interpretability).

Methods

Secondary data analysis was performed for 10,727 patients undergoing revision knee arthroplasty between 2013 to 2019 using a UK national patient-reported outcome measure (PROM) dataset. Outcome data were collected before revision and at six months postoperatively, using the OKS and EuroQol five-dimension score (EQ-5D). Measurement properties were assessed according to COnsensus-based Standards for the selection of health status Measurement Instruments (COSMIN) guidelines.


The Bone & Joint Journal
Vol. 100-B, Issue 12 | Pages 1572 - 1578
1 Dec 2018
Middleton R Wilson HA Alvand A Abram SGF Bottomley N Jackson W Price A

Aims

Our unit was identified as a negative outlier in the national patient-reported outcome measures (PROMs) programme, which has significant funding implications. As a centre that carries out a high volume of unicompartmental knee arthroplasty (UKA), our objectives were: 1) to determine whether the PROMs programme included primary UKA when calculating the gain in Oxford Knee Score (OKS); and 2) to determine the impact of excluding primary UKA on calculated OKS gains for primary knee arthroplasty.

Materials and Methods

National PROMs data from England (2012 to 2016) were analyzed. Inclusion of UKA cases in the national PROMs programme was determined using clinical codes. Local OKS gain was calculated for UKA and TKA and compared with the published PROMs results for 2012/13.


The Bone & Joint Journal
Vol. 98-B, Issue 10_Supple_B | Pages 22 - 27
1 Oct 2016
Bottomley N Jones LD Rout R Alvand A Rombach I Evans T Jackson WFM Beard DJ Price AJ

Aims

The aim of this to study was to compare the previously unreported long-term survival outcome of the Oxford medial unicompartmental knee arthroplasty (UKA) performed by trainee surgeons and consultants.

Patients and Methods

We therefore identified a previously unreported cohort of 1084 knees in 947 patients who had a UKA inserted for anteromedial knee arthritis by consultants and surgeons in training, at a tertiary arthroplasty centre and performed survival analysis on the group with revision as the endpoint.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXIX | Pages 74 - 74
1 Jul 2012
Al-Ali S Alvand A Gill HS Beard DJ Jackson W Price AJ Rees JL
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Rheumatology and Musculoskeletal Sciences, NIHR Biomedical Research Unit, University of Oxford and the Nuffield Orthopaedic Hospital, Oxford

Purpose

The aim of this study was to use motion analysis to objectively study the learning curve of surgical trainees performing arthroscopic meniscal repair on a training model in a skills laboratory.

Background

With improving technology and an appreciation of its likely chondroprotective effects, meniscal repair surgery is becoming more common. It remains a difficult procedure and is not routinely learnt during surgical training.