Giant Synovial Cyst Causing Femoral Occlusion following a Hip Replacement

2002 ◽  
Vol 12 (4) ◽  
pp. 394-396 ◽  
Author(s):  
W.J. Farrington ◽  
P. Lewis ◽  
A.G. MacEachern
Keyword(s):  
Aseptic Loosening ◽  
Hip Replacement ◽  
Polyethylene Wear ◽  
Femoral Vein ◽  
Significant Proportion ◽  
Synovial Cyst ◽  
Total Hip ◽  
Extrinsic Compression ◽  
Hip Replacements ◽  
Long Term Follow Up

Long-term follow-up of total hip replacements (THR) is essential for accurate recording of complications associated with this procedure, in particular the occurrence of wear and aseptic loosening which may warrant revision surgery. A significant proportion of patients with aseptic loosening are asymptomatic and radiological signs may be subtle and easily missed. Occasionally a synovial cyst can develop as a result of polyethylene wear debris and aseptic loosening. These cysts are usually small but can expand and become symptomatic. We describe a case where a large cyst caused sufficient extrinsic compression of the femoral vein as to occlude it. This was a potentially life-threatening complication. We emphasize the importance of clinical examination for leg swelling and groin mass in routine surveillance of total hip replacement.

scholarly journals Finite element analysis of polyethylene wear in total hip replacement: A literature review

2019 ◽  
Vol 233 (11) ◽  
pp. 1067-1088 ◽  
Author(s):  
Lin Wang ◽  
Graham Isaac ◽  
Ruth Wilcox ◽  
Alison Jones ◽  
Jonathan Thompson
Keyword(s):  
Finite Element ◽  
Literature Review ◽  
Hip Replacement ◽  
Material Selection ◽  
Polyethylene Wear ◽  
Element Analysis ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Hip Replacements ◽  
Modelling Techniques

Evaluation and prediction of wear play a key role in product design and material selection of total hip replacements, because wear debris is one of the main causes of loosening and failure. Multifactorial clinical or laboratory studies are high cost and require unfeasible timeframes for implant development. Simulation using finite element methods is an efficient and inexpensive alternative to predict wear and pre-screen various parameters. This article presents a comprehensive literature review of the state-of-the-art finite element modelling techniques that have been applied to evaluate wear in polyethylene hip replacement components. A number of knowledge gaps are identified including the need to develop appropriate wear coefficients and the analysis of daily living activities.

The pathogenesis of osteolysis in two different cementless hip replacements

1997 ◽  
Vol 211 (1) ◽  
pp. 59-63 ◽  
Author(s):  
I D Learmonth ◽  
E J Smith ◽  
J L Cunningham
Keyword(s):  
Molecular Weight ◽  
Aseptic Loosening ◽  
High Molecular Weight ◽  
Polyethylene Wear ◽  
Hip Implants ◽  
Total Hip ◽  
Hip Replacements ◽  
The Individual ◽  
Ultra High Molecular Weight

Wear of ultra-high molecular weight polyethylene has been incriminated in the osteolysis associated with aseptic loosening of hip implants. A variety of different factors can contribute to accelerated patterns of polyethylene wear and subsequent osteolysis. This paper examines the incidence of osteolysis observed in two different well-matched cohorts of cementless total hip arthro-plasties. The patterns of osteolysis observed, which are ascribed to the generation of polyethylene debris, are interpreted with reference to the design of the individual prostheses.

Complications with the Zurich Canine Total Hip Replacement System in an Initial Series of Cases Performed by a Single Surgeon

2021 ◽  
Author(s):  
Samuel P. Franklin ◽  
Nathan A. Miller ◽  
Todd Riecks
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Weight Bearing ◽  
Normal Function ◽  
High Rate ◽  
Total Hip ◽  
Initial Series ◽  
Major Complications ◽  
Hip Replacements ◽  
Replacement System

Abstract Objective The aim of this study was to quantify the complications using the Zurich total hip replacement system in an initial series of cases performed by a single surgeon who had experience with other total hip replacement systems. Materials and Methods This was a retrospective study in which complications were classified as major if any treatment was needed or if the outcome was less than near-normal function. Complications that did not warrant treatment and that did not result in function that was inferior to near-normal were considered minor. Outcomes were assessed by radiographic review, physical examination, subjective gait evaluation or, in one case, by objective gait analysis. Bilateral total hip replacements were considered separate procedures. Results The first 21 procedures in 19 dogs performed by a single surgeon were included. The mean time to follow-up was 48 weeks (range: 8–120 weeks; standard deviation: 36 weeks). Two cases (of 21) experienced major complications including one dog with excess internal femoral rotation during weight bearing and one dog having luxation. One case (of 21) had a minor complication; femoral fracture in the presence of an intact bone plate that maintained alignment and healed without treatment. Clinical Significance A high rate of successful outcomes with few major complications can be obtained in the initial cases treated using the Zurich total hip replacement system for surgeons with prior experience with other total hip replacement systems.

scholarly journals The appropriateness of blood transfusion following primary total hip replacement

2012 ◽  
Vol 94 (3) ◽  
pp. 201-203 ◽  
Author(s):  
PJ Joy ◽  
SJ Bennet
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Orthopaedic Surgery ◽  
Significant Proportion ◽  
Study Data ◽  
Total Hip ◽  
Audit Data ◽  
Prescribing Practice ◽  
Service Data

INTRODUCTION A significant proportion of all red cell transfusions are given to patients undergoing elective orthopaedic surgery. Concern over transfusion safety and cost, coupled with evidence showing that restrictive transfusion policies benefit patients, prompted us to audit our blood prescribing practice at Gloucestershire Hospitals NHS Foundation Trust in order to assess the appropriateness of every transfusion episode following elective primary total hip replacement. METHODS All patients undergoing a primary total hip replacement in our department over a six-month period were included in the study. Data were collected retrospectively using case note examination and transfusion service data. Standards were dictated by the British Orthopaedic Association guidelines on blood conservation in elective orthopaedic surgery. RESULTS Twenty-seven per cent of patients (39/143) were transfused. Forty-six per cent of these (18/39) were transfused inappropriately and twenty-three per cent (9/39) appropriately. Thirteen per cent (5/39) had a valid indication for transfusion but were over-transfused and in eighteen per cent (7/39) the quality of documentation did not allow an assessment to be made. Fifty-two per cent of patients who had surgical drains (29/56) were transfused. Reaudit following staff education and amendments to the local transfusion policy did not demonstrate a reduction in transfusion rates. CONCLUSIONS This audit showed that significant potential exists for reducing transfusion rates based on optimising prescribing practice alone. It also demonstrated that changing local practice based on audit data can be challenging.

Long-Term Follow-up of Total Hip Replacement in Patients with Osteonecrosis

1985 ◽  
Vol 16 (4) ◽  
pp. 757-769 ◽  
Author(s):  
Charles N. Cornell ◽  
Eduardo A. Salvati ◽  
Paul M. Pellicci
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Total Hip ◽  
Long Term Follow Up

ACCURACY OF MEASUREMENT OF POLYETHYLENE WEAR WITH USE OF RADIOGRAPHS OF TOTAL HIP REPLACEMENTS

2003 ◽  
Vol 85 (12) ◽  
pp. 2378-2384 ◽  
Author(s):  
EDWARD EBRAMZADEH ◽  
SOPHIA N. SANGIORGIO ◽  
FEDERICO LATTUADA ◽  
JOON-SOON KANG ◽  
ROBERTO CHIESA ◽  
...  
Keyword(s):  
Polyethylene Wear ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Hip Replacements ◽  
Accuracy Of Measurement

Polyethylene Wear in Retrieved Canine Acetabular Components

2000 ◽  
Vol 13 (02) ◽  
pp. 78-86 ◽  
Author(s):  
D. Tompkins ◽  
B. Bhushan ◽  
M. L. Olmstead ◽  
J. Dyce
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Total Hip Replacement ◽  
Acetabular Component ◽  
Hip Replacement ◽  
Polyethylene Wear ◽  
Total Hip ◽  
Particulate Debris ◽  
Acetabular Components ◽  
Scanning Electron

SummaryThe aim of this pilot study was to define the mechanism and mode of polyethylene wear in acetabular components retrieved from seven dogs following therapeutic total hip replacement. The articular surface of each acetabular component was examined using contact profilometry and scanning electron microscopy (SEM). Peak-tovalley distance (P-V) and arithmetic average surface roughness (Ra) were calculated for each quadrant of the surface. Deformation of the regular profile of the machining lines was the least severe form of surface alteration. Randomly orientated scratches, fine tapered filaments, ripples, and coarse surface shredding were common SEM observations. Gouging of the convex surface of the cup was seen in two cases following failure of the polyethylenecement interface. Wear of the nonarticular acetabular rim suggested neck impingement in one case. P-V and Ra were significantly lower in the craniodorsal zone, compared to the average roughness of the other three quadrants (p < 0.05). Abrasion, adhesion and fatigue were the principal mechanisms of polyethylene wear, and were implicated in the production of polyethylene particulate debris. Meticulous removal of abrasive third bodies at the time of surgery, and correct orientation of the acetabular component, should reduce early and severe wear.Polyethylene wear is inevitable following metal-on-polyethylene total hip replacement. In this study, the nature of polyethylene wear in retrieved canine acetabular components was defined, using contact profilometry and scanning electron microscopy. Abrasion, adhesion and fatigue were the principal mechanisms of wear, and were implicated in the production of polyethylene particulate debris.

Wear Failure Analysis of UHMWPE Acetabular Cups in THR

2019 ◽  
Vol 957 ◽  
pp. 417-426
Author(s):  
Corneliu Nicolae Druga ◽  
Ileana Constanta Rosca ◽  
Radu Necula
Keyword(s):  
Femoral Component ◽  
Total Hip Replacement ◽  
Acetabular Component ◽  
Hip Replacement ◽  
Hip Prosthesis ◽  
Polyethylene Wear ◽  
Femoral Shaft ◽  
Hip Resurfacing ◽  
Total Hip ◽  
Joint Prostheses

The UHMWPE acetabular cups are the most popular joints for joint prostheses after Charnley introduced UHMWPE for the acetabular component in 1962. It has been demonstrated that polyethylene wear remains the main source of particles in the THR and therefore requires particular attention. The paper presents a series of theoretical and practical aspects regarding the wear of acetabular cups (made of UHMWPE) from the total hip prosthesis component. At the same time, the other tribological phenomena that occur in these MoP (metal on polyethylene) combinations are treated, such as lubrication and friction. Total Hip Replacement & Hip Resurfacing A hip replacement involves replacing the hip joint with a mechanical bearing system which is comprised of a femoral component and an acetabular component. During a hip replacement the acetabulum is reamed and the acetabular component is fitted into the cavity and the femoral component can either be placed over a reamed femoral head, in a procedure referred to as hip resurfacing, or positioned inside the femoral shaft during a total hip replacement [1]. Fig. 1. Total Hip Replacement (a) and Hip Resurfacing Replacement (b) [2].

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