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Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_3 | Pages 6 - 6
1 Apr 2018
Beswick A Wylde V Artz N Lenguerrand E Jepson P Sackley C Gooberman-Hill R Blom A
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Background

To aid recovery, rehabilitation is an important adjunct to surgery. Acknowledging the MRC framework for complex interventions we assessed the evidence-base for components of comprehensive rehabilitation in total hip (THR) and total knee replacement (TKR) pathways.

Methods

We conducted systematic reviews and meta-analyses of randomised controlled trials (RCT) of pre-surgical exercise and education, occupational therapy and post-operative physiotherapy. In feasibility RCTs we explored acceptability of pain self-management and occupational therapy before THR, and physiotherapy after TKR. We searched trial registers for ongoing RCTs.


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_3 | Pages 50 - 50
1 Apr 2018
Wylde V Artz N Dixon S Marques E Lenguerrand E Blom A Gooberman-Hill R
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Background

Inpatient physiotherapy is routinely provided after total knee replacement (TKR) surgery to enhance recovery prior to discharge. However, the provision of outpatient physiotherapy is variable in the UK, and the longer-term benefits of outpatient physiotherapy are unclear. This study aimed to evaluate the feasibility of conducting a randomised controlled trial (RCT) to assess the effectiveness and cost-effectiveness of group-based outpatient physiotherapy after TKR.

Methods

Patients listed for primary TKR were recruited prior to surgery. Patients who decided not to participate were asked about their reasons for non-participation. Patients were randomised to attend a newly developed post-operative physiotherapy class plus usual care or usual care alone. Patients allocated to the intervention group were invited to attend a weekly one-hour physiotherapy class, starting at 6 weeks after surgery and running over 6 consecutive weeks. The group classes were run by two physiotherapists within an outpatient gym, and involved task-orientated and individualised exercises. Classes ran on a rolling system, allowing new patients to join each week. Participants completed an evaluation questionnaire after the final class. Outcomes assessment was by questionnaire prior to surgery and 2 weeks, 3 months and 6 months after surgery. Outcomes related to function, pain, balance, self-efficacy, participation, quality of life and resource use.


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_2 | Pages 70 - 70
1 Jan 2017
Wylde V Marques E Artz N Blom A Gooberman-Hill R
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Total hip replacement (THR) is a common elective surgical procedure and can be effective for reducing chronic pain. However, waiting times for THR can be considerable, and patients often experience significant pain during this time. A pain self-management intervention may provide patients with the skills to enable them to manage their pain and its impact more effectively before surgery. However, studies of arthritis self-management programmes have faced challenges because of low recruitment rates, poor intervention uptake, and high attrition rates. This study aimed to evaluate the feasibility of a randomised controlled trial (RCT) to assess the effectiveness and cost-effectiveness of a group-based pain self-management course for patients undergoing THR. Specific objectives were to assess trial design, ascertain recruitment and retention rates, identify barriers to participation, refine data collection methods, and evaluate uptake and patient satisfaction with the course.

Patients listed for THR in an elective orthopaedic centre Bristol, UK were sent a postal invitation about the study. Participants were randomised to attend a pain self-management course plus standard care or standard care only using a computer-generated randomisation system. The pain self-management course was delivered by Arthritis Care and consisted of two half-day group sessions prior to surgery and one full-day group session 2–4 months after surgery. A structured course evaluation questionnaire was completed by participants.

Outcomes assessment was by postal questionnaire prior to surgery and 1-month, 3-months and 6-months after surgery. Self-report resource use data were collected using a diary prior to surgery and inclusion of resource use questions in the 3-month and 6-month post-operative questionnaires. Brief telephone interviews were conducted with non-participants to explore barriers to participation.

Postal invitations were sent to 385 eligible patients and 88 patients consented to participate (23% recruitment rate). Participants had a mean age of 66 years and 65% were female. Brief interviews with 57 non-participants revealed the most common reasons for non-participation were perceptions about the intervention and difficulties in getting to the hospital for the course.

Of the 43 patients randomised to the intervention group, 28 attended the pre-operative pain self-management sessions and 11 attended the post-operative sessions. Participant satisfaction with the course was high, and patients enjoyed the group format.

Retention of participants was acceptable, with 83% completing follow-up. Questionnaire return rates were high (76–93%), with the exception of the pre-operative resource use diary (35%). Completion rates for the resource use questions varied by category and allowed for an economic perspective from the health and social care payer to be taken.

Undertaking feasibility work for a RCT is labour-intensive; however this study highlights the importance of conducting such work. Postal recruitment resulted in a low recruitment rate and brief interviews with non-participants provided valuable information on barriers to participation. Embedding collection of resource use data within questionnaires resulted in higher completion rates than using resource use diaries. While patients who attended the course gave positive feedback, attendance was low. Findings from this feasibility study enable us to design successful definitive group-based RCTs in the future.


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_5 | Pages 5 - 5
1 Mar 2014
Hassaballa M Artz N Mihok P Chapman L Robinson J Porteous A Murray J
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This is a prospective review of consecutive patients who underwent knee revision surgery using the Legion knee system.

Clinical and functional assessments (American Knee Scores-AKS, WOMAC and Oxford knee score-OKS) were carried out preoperatively, one year and 2 years post op. Radiographic evaluation was done at 1 and 2 years included review of standing AP, lateral and skyline views. Figgie's method was used to measure the joint line reproduction.

210 patients underwent revision knee system 103 male: 107 females with a mean age of 66.4 (44–87) yrs. Mean BMI-26.03 (21–50). We had a 2-year follow up for 110 patients. Surgery was carried out at a single centre and performed by Bristol knee specialists.

Indications for surgery were aseptic loosening (84), infection (27) instability (47), pain and stiffness (31), progression of disease (6), peri-prosthetic fractures (15)

The AKS and WOMAC scores at, 1 year and 2 years follow up showed significant improvements in pain and function. The mean total AKS improved from 75.7/200 pre-operatively to 140.5/200 at 2 yrs. Radiographic assessment showed a mean AP coronal femoral angle of 95.3 degrees (89.6–99.9), coronal tibial angle of 90.1 degrees (88–92). The mean sagittal femoral and tibial angles were 88.4 and 90.4 degrees respectively.

The short-term results showed significant improvement in functional and pain scores irrespective of indications for revision surgery. The Legion system has showed good outcome scores that match or beat published series on revisions. It also showed a good ability to restore joint line.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 15 - 15
1 Sep 2012
George A Hassaballa M Artz N Alhammali T Robinson J Porteus A Murray J
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Introduction

The legion knee revision system was designed as a follow and improvement to the Genesis II knee system- allowing for a surgeon directed femoral rotation as opposed to the in-built femoral rotation in the previous system.

This is a prospective review of consecutive patients who underwent knee revision surgery using the legion knee system.

Methods

Clinical and functional assessments were carried out preoperatively, one year and 2 years post op. Radiographic evaluation was done at 1 and 2years follow up. Standard knee scoring systems (American Knee Scores-AKS, and Oxford score were used for the clinical and functional evaluation of these patients. The WOMAC score was also used to assess for pain, stiffness and social function in these patients. The radiographic assessment included review of standing AP, lateral and skyline views. Figgie's method was used to measure the joint line reproduction. A difference of 5 mm (pre = op/post-op) was deemed satisfactory.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXIX | Pages 29 - 29
1 Jul 2012
Parwez T Hassaballa M Artz N Robinson J Murray J Porteous A Newman J
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Purpose

The aim of this study was to compare the short-term and mid-term outcome of lateral UKRs using a single prosthesis, the AMC Uniglide knee implant.

Methods

Between 2003 and 2010, seventy lateral unicompartmental knee replacements (mean patient age 63.6±12.7 years) were performed at our unit for isolated lateral compartmental disease. Range of knee motion and functional outcome measures including the American Knee Society (AKSS), Oxford (OKS) and WOMAC scores were recorded from 19 knees at five years' post-operatively and compared to 35 knees at two-years and 53 knees at one-year post-op.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXIX | Pages 10 - 10
1 Jul 2012
Robinson JR Singh R Artz N Murray JR Porteous AJ Williams M
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Purpose

The purpose of this study was to determine whether intra-operative identification of osseous ridge anatomy (lateral intercondylar “residents” ridge and lateral bifurcate ridge) could be used to reliably define and reconstruct individuals' native femoral ACL attachments in both single-bundle (SB) and double-bundle (DB) cases.

Methods

Pre-and Post-operative 3D, surface rendered, CT reconstructions of the lateral intercondylar notch were obtained for 15 patients undergoing ACL reconstruction (11 Single bundle, 4 Double-bundle or Isolated bundle augmentations). Morphology of native ACL femoral attachment was defined from ridge anatomy on the pre-operative scans. Centre's of the ACL attachment, AM and PL bundles were recorded using the Bernard grid and Amis' circle methods. During reconstruction soft tissue was carefully removed from the lateral notch wall with RF coblation to preserve and visualise osseous ridge anatomy. For SB reconstructions the femoral tunnel was sited centrally on the lateral bifurcate ridge, equidistant between the lateral intercondylar ridge and posterior cartilage margin. For DB reconstructions tunnels were located either side of the bifurcate ridge, leaving a 2mm bony bridge. Post-operative 3D CTs were obtained within 6 weeks post-op to correlate tunnel positions with pre-op native morphology.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XIX | Pages 4 - 4
1 May 2012
Bradford O Burnand H Artz N Hassaballa M Williams M Porteous A Robinson J Murray J
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Background

Body Mass Index (BMI) is used to quantify generalised obesity, but does not account for variations in soft tissue distribution.

Aims

To define an index quantifying the knee soft tissue depth, utilising underlying bony anatomy, and compare with BMI as a measure of individual patient's knee soft tissue envelopes. We performed a practicality and reproducibility study to validate the Bristol Knee Index for future prospective use.


Orthopaedic Proceedings
Vol. 93-B, Issue SUPP_IV | Pages 487 - 487
1 Nov 2011
Artz N Daniels K Joslin L MacFaul W Rintoul E Dolan P
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Background: Neck pain is a growing problem which is linked to occupational factors that include work above shoulder height or sustained neck flexion. These activities may induce fatigue in the neck muscles impairing the muscles’ ability to provide reflex contractions that protect against tissue injury. The aim of this study was to investigate the effect of neck muscle fatigue on reflex activation of the neck muscles.

Methods: Healthy volunteers were subjected to one of two loading protocols. Isometric contractions of neck extensors at 60% MVC were sustained to the endurance limit (n=30) to induce high level fatigue in these muscles. A similar protocol for neck flexors (n=21) was used to initiate low level contraction of the extensors which are co-activated to stabilise the cervical spine under such circumstances. Before and after each loading protocol, reflex activation of the trapezius muscle was assessed using skin surface electromyography (EMG) to measure the latency and amplitude of muscle activation in response to a sudden perturbation of the head.

Results: Reflex latencies increased from 73±17ms to 93±27ms (p=0.0041), and from 72±12ms to 97±28ms (p< 0.0001) following low and high level extensor fatigue, respectively. Time to peak EMG also increased from 122±32ms to 148±39ms (p=0.0093), and from 113±15ms to 138±25ms (p< 0.0001), respectively, although no change in peak EMG amplitude was observed.

Conclusions: Reflex activation of trapezius was substantially delayed following both loading protocols. These findings suggest that even low level postural loading in the workplace may impair neck muscle reflexes rendering the underlying tissues more vulnerable to strain injury.

Conflicts of Interest: None

Source of Funding: BBSRC (Biotechnology and Biological Sciences Research Council, UK)


Orthopaedic Proceedings
Vol. 93-B, Issue SUPP_IV | Pages 487 - 488
1 Nov 2011
Artz N Adams M Dolan P
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Background: Sensorimotor mechanisms that control activation of neck and trunk muscles are important in preventing injury to spinal tissues. People with back pain often show delayed reflex activation of trunk muscles, and such impairment increases the risk of future back pain. The aim of this study was to investigate whether sensorimotor impairment is evident in patients with neck pain.

Methods: Measures of sensorimotor function were assessed in fourteen patients with chronic, non-traumatic neck pain and forty healthy controls. Position sense was evaluated using the Fastrak electromagnetic tracking device to assess angular errors during head repositioning tasks. Movement sense was assessed using a KinCom dynamometer to determine the time taken to detect head motion at 1°s-1 and 10°s-1. Reflex responses were assessed using surface electromyography to determine the onset of muscle activation (reflex latency) in trapezius and sternocleidomastoid muscles, following perturbations of the head.

Results: Neck pain patients showed increased angular errors in reproducing upright postures, compared to controls (2.24±1.21° vs 1.85±1.06° respectively; p=0.01), and faster movement detection times (385±98ms vs 540±182ms respectively; p=0.0052). Reflex activation of trapezius was delayed in patients, indicated by a 20ms increase in reflex latency (89±19ms vs 69±21ms in controls; p=0.0039).

Conclusions: Sensorimotor function is altered in patients with neck pain. Enhanced movement detection suggests some afferents become hypersensitive in response to pain. However, impaired position sense and reflex activation suggest that some proprioceptors, including muscle spindles, develop a reduced sensitivity to mechanical stimuli. These changes may impair reflexive muscle protection and expose the cervical spine to repetitive minor injuries.

Conflicts of Interest: None

Source of Funding: BBSRC (Biotechnology and Biological Sciences Research Council, U.K.)


Orthopaedic Proceedings
Vol. 92-B, Issue SUPP_I | Pages 232 - 233
1 Mar 2010
Artz N Adams M Dolan P
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Purpose of Study: The neck is the most mobile region of the spine, so neck muscles must provide stability, and control spinal movements. This action requires effective sensory and motor control mechanisms which, if impaired, may increase the risk of injury and pain. The aim of this study was to investigate sensorimotor function of neck muscles in healthy volunteers in order to provide normative data for comparative studies on neck pain patients.

Methods: Thirty-one healthy volunteers participated. Position sense was evaluated using an electromagnetic tracking device (3-Space FASTRAK) to assess errors in repositioning the head in upright and flexed postures. Movement sense was assessed as time to detect head motion at 1°s-1 and 10°s-1, using a KinCom dynamometer. Latency of reflex muscle activation following rapid perturbation of the head was assessed bilaterally in trapezius and sternocleidomastoid muscles using surface electromyography.

Results: Mean repositioning errors were 2.20±1.46° and 2.54±1.69° for upright and flexed postures respectively. Time to detect head motion was greater at 1°s-1 (739±349ms and 556±213ms, in extension and flexion respectively) compared to 10°s-1 (375±89ms and 377±66ms). Mean reflex latencies were shorter for trapezius (left: 77.9±43.4ms, right: 72.3±35.1ms) than for sternocledomastoid (left: 106.1±29.2ms, right: 102.7±35.9ms).

Conclusion: Position sense in the cervical spine is superior to that reported in thoracolumbar regions, especially in flexed postures. Detection of head movement is velocity-dependent suggesting input occurs from both phasic and tonic mechanoreceptors. Reflex latencies were shorter for trapezius than for sternocledomastoid suggesting that stretch reflexes in trapezius play a predominant role in preventing excessive flexion of the cervical spine.