Michael Wyatt

ORCID: 0000-0001-5283-2608
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About
Contact & Profiles
Research Areas
  • Orthopaedic implants and arthroplasty
  • Total Knee Arthroplasty Outcomes
  • Orthopedic Infections and Treatments
  • Hip disorders and treatments
  • Orthopedic Surgery and Rehabilitation
  • Hip and Femur Fractures
  • Spine and Intervertebral Disc Pathology
  • Tendon Structure and Treatment
  • Pelvic and Acetabular Injuries
  • Telemedicine and Telehealth Implementation
  • Healthcare Systems and Technology
  • COVID-19 and healthcare impacts
  • Surgical site infection prevention
  • Peripheral Nerve Disorders
  • Shoulder Injury and Treatment
  • Anesthesia and Pain Management
  • Spinal Fractures and Fixation Techniques
  • Scoliosis diagnosis and treatment
  • Cardiac Valve Diseases and Treatments
  • Elbow and Forearm Trauma Treatment
  • Foot and Ankle Surgery
  • Healthcare cost, quality, practices
  • Case Reports on Hematomas
  • Bone fractures and treatments
  • Spinal Hematomas and Complications

Massey University
2019-2024

Palmerston North Hospital
2019-2024

University of Otago
2011-2022

University Hospitals Bristol and Weston NHS Foundation Trust
2020

University of Bristol
2018-2020

University Hospitals Bristol NHS Foundation Trust
2019-2020

Christchurch Hospital
2017-2019

Southmead Hospital
2018-2019

National Institute for Health Research
2019

Guy's and St Thomas' NHS Foundation Trust
2019

We have investigated whether the use of laminar-flow theatres and space suits reduced rate revision for early deep infection after total hip (THR) knee (TKR) replacement by reviewing results New Zealand Joint Registry at ten years. Of 51 485 primary THRs 36 826 TKRs analysed, were used in 35.5% 23.5%. For THR there was a significant increase those procedures performed with suit compared without (p < 0.0001), carried out theatre conventional 0.003) undertaken 0.001) when such suit. The...

10.1302/0301-620x.93b1.24862 article EN Journal of Bone and Joint Surgery - British Volume 2011-01-01

Background The definition of osseous instability in radiographic borderline dysplastic hips is difficult. A reliable tool that aids decision-making—specifically, a might be associated with instability—therefore would very helpful for this group patients. Questions/purposes (1) To compare new measurement, which we call the Femoro-Epiphyseal Acetabular Roof (FEAR) index, lateral center-edge angle (LCEA) and acetabular index (AI), respect to intra- interobserver reliability; (2) correlate AI,...

10.1007/s11999-016-5137-0 article EN Clinical Orthopaedics and Related Research 2016-10-28

Importance Despite increased use of antibiotic-loaded bone cement (ALBC) in joint arthroplasty over recent decades, current evidence for prophylactic ALBC to reduce risk periprosthetic infection (PJI) is insufficient. Objective To compare the rate revision attributed PJI following primary total knee (TKA) using vs plain cement. Design, Setting, and Participants This international cohort study used data from 14 national or regional registries Australia, Denmark, Finland, Germany, Italy, New...

10.1001/jamanetworkopen.2024.12898 article EN cc-by-nc-nd JAMA Network Open 2024-05-23

Introduction: Custom 3D-printed acetabular implants are a new technology used in hip surgery with ever-increasing frequency. They offer patient-specific to optimise filling of bone defects and implant-bone contact, without the need for excessive resection. Methods: This is retrospective cohort study 46 consecutive patients who underwent an Ossis unilateral custom implant. Clinical (Oxford Hip Score OHS-60), Western Ontario McMaster Universities Osteoarthritis Index (WOMAC), Harris (HHS)...

10.1177/1120700018760817 article EN Hip International 2018-05-21

Background and purpose: Antibiotic-loaded bone cement (ALBC) systemic antibiotic prophylaxis (SAP) have been used to reduce periprosthetic joint infection (PJI) rates. We investigated the use of ALBC SAP in primary total knee arthroplasty (TKA).Patients methods: This observational study is based on 2,971,357 TKAs reported 2010–2020 national/regional registries Australia, Denmark, Finland, Germany, Italy, Netherlands, New Zealand, Norway, Romania, South Africa, Sweden, Switzerland, UK, USA....

10.2340/17453674.2023.17737 article EN cc-by-nc Acta Orthopaedica 2023-08-09

Aims A borderline dysplastic hip can behave as either stable or unstable and this makes surgical decision making challenging. While an may be best treated by acetabular reorientation, hips arthroscopically. Several imaging parameters help to identify the appropriate treatment, including Femoro-Epiphyseal Acetabular Roof (FEAR) index, measured on plain radiographs. The aim of study was assess reliability sensitivity FEAR index MRI compared with its radiological measurement. Patients Methods...

10.1302/0301-620x.101b12.bjj-2019-0502.r1 article EN The Bone & Joint Journal 2019-12-01

Background: Closed tibialis anterior tendon rupture is an uncommon condition typically occurring in the middle aged to elderly patient. Diagnosis may be delayed due unfamiliarity with problem by treating physician. Materials and Methods: We treated seven patients (4 males 54 80; 3 females 43 82) this problem. Four had a history of systemic corticosteroid use one local steroid injection. were managed direct operative repair non-anatomical talar neck. Two nonoperatively whom subsequently...

10.3113/fai.2009.0758 article EN Foot & Ankle International 2009-08-01

Effective analgesia after total knee arthroplasty (TKA) improves patient satisfaction, mobility and expedites discharge. This study assessed whether continuous femoral nerve infusion (CFNI) was superior to a single-shot block in primary TKA surgery completed under subarachnoid blockade including morphine.We performed an adequately powered, prospective, randomised, placebo-controlled trial comparing CFNI of 0.125% bupivacaine versus normal saline following anaesthesia with intrathecal...

10.1302/2046-3758.42.2000329 article EN cc-by-nc-nd Bone and Joint Research 2015-02-01

We have investigated the revision rates of all bearing surface combinations for primary total hip replacement (THR) registered on New Zealand Joint Registry (NZJR) to determine which coupling has been most durable and successful over last 16 years.There were 106,139 THRs registered, resulting in 4,960 revisions any cause. examined all-cause rates, reasons performed survival analyses.Ceramic-on-highly cross-linked polyethylene (CoPx) had lowest rate 0.54/100-component-years (cys) (95%...

10.5301/hipint.5000585 article EN Hip International 2017-01-12

Background The RM Pressfit vitamys is a titanium particle-coated monoblock cup with vitamin E stabilised highly cross-linked polyethylene. Initial fixation achieved via press-fit subsequent stability by bone on-growth. This the first study to report 5-year results of this design. Methods We performed prospective cohort according STROBE guidelines 100 consecutive total hip replacements (THRs) in 92 patients all ceramic heads. Demographic data, pre/postoperative visual analogue scale (VAS) for...

10.5301/hipint.5000469 article EN Hip International 2017-01-20

Femoral component offset influences the torque forces exerted on a femoral stem and may therefore adversely affect survival. This study investigated influence of revision rates for primary total hip replacements (THR) registered New Zealand Joint Registry (NZJR).There were 106,139 THRs registered, resulting in 4960 revisions any cause. There 46,242 performed using five commonest components listed NZJR. A 41,100 done osteoarthritis which 40,548 had all information available analysis. We...

10.1177/1120700018780318 article EN Hip International 2018-06-06

The purpose of this study was to assess the effect limb elevation on hand swelling after surgery. We prospectively randomized 113 patients undergoing fasciectomy or a trapeziectomy into one two groups. first group had elevated postoperatively and hands second were not elevated. Hand assessed using volumetric method. Although less in did reach statistical significance. Subgroup analysis revealed no further significant differences. There complications who have elevation. This does support...

10.1177/1753193408103720 article EN Journal of Hand Surgery (European Volume) 2010-01-29

Objectives Our study aimed to examine if a mobile-bearing total knee replacement (TKR) offered an advantage over fixed-bearing designs with respect rates of secondary resurfacing the patella in knees which it was initially left unresurfaced. Methods We examined 11-year report New Zealand Joint Registry and identified all primary TKR that had been implanted > 500 without patella. how many these were mobile-bearing, cruciate-retaining posterior-stabilised designs. assessed for each group...

10.1302/2046-3758.27.2000159 article EN cc-by-nc-nd Bone and Joint Research 2013-07-01
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