Positive ulnar variance is an established risk factor for idiopathic
ulnar impaction syndrome (UIS). However, not all patients with positive
ulnar variance develop symptomatic UIS and other factors, including
the morphology of the lunate, may be involved. The aim of this study
was to clarify the relationship between lunate morphology and idiopathic
UIS. A cohort of 95 patients with idiopathic UIS (UIS group) was compared
with 95 asymptomatic controls with positive ulnar variance. The
shape of the lunate was measured using the capitate-triquetrum distance
(CTD), ulnar coverage ratio (UCR), radiolunate distance and radiolunate
angle. The association of radiographic parameters and lunate types
with the development of UIS was investigated in univariable and
multivariable analyses. Receiver operating characteristic curves
were used to estimate a cutoff for any statistically significant
variables.Aims
Patients and Methods
Calcium sulphate (CaSO4) is a resorbable material
that can be used simultaneously as filler of a dead space and as
a carrier for the local application of antibiotics. Our aim was
to describe the systemic exposure and the wound fluid concentrations
of vancomycin in patients treated with vancomycin-loaded CaSO4 as
an adjunct to the routine therapy of bone and joint infections. A total of 680 post-operative blood and 233 wound fluid samples
were available for analysis from 94 implantations performed in 87
patients for various infective indications. Up to 6 g of vancomycin
were used. Non-compartmental pharmacokinetic analysis was performed
on the data from 37 patients treated for an infection of the hip.Aims
Patients and Methods
The Corail stem has good long-term results. After four years
of using this stem, we have detected a small group of patients who
have presented with symptomatic metaphyseal debonding. The aim of
this study was to quantify the incidence of this complication, to
delineate the characteristics of patients presenting with this complication
and to compare these patients with asymptomatic controls to determine
any important predisposing factors. Of 855 Corail collarless cementless stems implanted for osteoarthritis,
18 presented with symptomatic metaphyseal debonding. A control group
of 74 randomly selected patients was assembled. Clinical and radiological
parameters were measured and a logistic regression model was created
to evaluate factors associated with metaphyseal debonding.Aims
Patients and Methods
To investigate whether elective joint arthroplasty performed
at the weekend is associated with a different 30-day mortality We examined the 30-day cumulative mortality rate (Kaplan-Meier)
for all elective hip and knee arthroplasties performed in England
and Wales between 1st April 2003 and 31st December 2014, comprising
118 096 episodes undertaken at the weekend and 1 233 882 episodes
performed on a weekday. We used Cox proportional-hazards regression
models to assess for time-dependent variation and adjusted for identified
risk factors for mortality.Aims
Patients and Methods
To evaluate the incidence of primary venous thromboembolism (VTE),
epidural haematoma, surgical site infection (SSI), and 90-day mortality
after elective spinal surgery, and the effect of two protocols for
prophylaxis. A total of 2181 adults underwent 2366 elective spinal procedures
between January 2007 and January 2012. All patients wore anti-embolic
stockings, mobilised early and were kept adequately hydrated. In
addition, 29% (689) of these were given low molecular weight heparin
(LMWH) while in hospital. SSI surveillance was undertaken using the
Centers for Disease Control and Prevention criteria.Aims
Patients and Methods
It is well established that there is a strong association between
Perthes’ disease and worsening socioeconomic deprivation. It has
been suggested that the primary determinant driving this association
is exposure to tobacco smoke. This study aimed to examine this hypothesis. A hospital case-control study (n = 149/146) examined the association
between tobacco smoke exposure and Perthes’ disease, adjusting for
area-level socioeconomic deprivation. Tobacco smoke exposure was
assessed by parental questionnaire of smoking habits during pregnancy,
and by quantitative assay of current exposure using the urinary
cotinine-creatinine ratio, which is a widely used and validated
measure of tobacco smoke exposure.Aims
Patients and Methods
A contact patch to rim (CPR) distance of <
10 mm has been
associated with edge-loading and excessive wear. However, not all
arthroplasties with a low CPR distance show problems with wear.
Therefore, CPR distance may not be the only variable affecting the
post-operative metal ion concentrations. We used multiple logistic regression to determine what variables
differed between the patients who had high and low cobalt (CoS)
and chromium (CrS) serum ion concentrations within a cohort of patients
with low (<
10 mm) CPR distances. A total of 56 patients treated
with unilateral hip resurfacing arthroplasty (HRA) had CoS and CrS
ion studies performed more than one year after surgery. The mean
age of the patients at the time of surgery was 51.7 years (29 to
70), with 38 women (68%) and 18 men (32%).Aims
Patients and Methods
The aim of this prospective randomised controlled trial was to
compare non-operative and operative management for acute isolated
displaced fractures of the olecranon in patients aged ≥ 75 years. Patients were randomised to either non-operative management or
operative management with either tension-band wiring or fixation
with a plate. They were reviewed at six weeks, three and six months
and one year after the injury. The primary outcome measure was the
Disabilities of the Arm, Shoulder and Hand (DASH) score at one year.Aims
Patients and Methods
To determine the outcomes following revision surgery of metal-on-metal
hip arthroplasties (MoMHA) performed for adverse reactions to metal
debris (ARMD), and to identify factors predictive of re-revision. We performed a retrospective observational study using National
Joint Registry (NJR) data on 2535 MoMHAs undergoing revision surgery
for ARMD between 2008 and 2014. The outcomes studied following revision were
intra-operative complications, mortality and re-revision surgery.
Predictors of re-revision were identified using competing-risk regression
modelling.Aims
Patients and Methods
The aim of this study was to compare the effect of a percutaneous
radiofrequency heat lesion at the medial branch of the primary dorsal
ramus with a sham procedure, for the treatment of lumbar facet joint
pain. A randomised sham-controlled double blind multicentre trial was
carried out at the multidisciplinary pain centres of two hospitals.
A total of 60 patients aged >
18 years with a history and physical
examination suggestive of facet joint pain and a decrease of ≥ 2
on a numerical rating scale (NRS 0 to 10) after a diagnostic facet
joint test block were included. In the treatment group, a percutaneous
radiofrequency heat lesion (80oC during 60 seconds per
level) was applied to the medial branch of the primary dorsal ramus.
In the sham group, the same procedure was undertaken without for
the radiofrequency lesion. Both groups also received a graded activity
physiotherapy programme. The primary outcome measure was decrease
in pain. A secondary outcome measure was the Global Perceived Effect scale
(GPE).Aims
Patients and Methods
Little is known about employment following total knee arthroplasty
(TKA). This study aims to identify factors which predict return
to work following TKA in patients of working age in the United Kingdom. We prospectively assessed 289 patients (289 TKAs) aged ≤ 65 years
who underwent TKA between 2010 and 2013. There were 148 women. The
following were recorded pre-operatively: age, gender, body mass
index, social deprivation, comorbidities, indication for surgery,
work status and nature of employment, activity level as assessed by
the University of California, Los Angeles (UCLA) activity score
and Oxford Knee Score (OKS). The intention of patients to return
to work or to retire was not assessed pre-operatively. At a mean
of 3.4 years (2 to 4) post-operatively, the return to work status,
OKS, the EuroQol-5 dimensions (EQ-5D) score, UCLA activity score
and Work, Osteoarthritis and joint-Replacement (WORQ) score were
obtained. Univariate and multivariate analyses were performed.Aims
Patients &
Methods
Infection of implants is a major problem in elective and trauma surgery. Heating is an effective way to reduce the bacterial load in food preparation, and studies on hyperthermia treatment for cancer have shown that it is possible to heat metal objects with pulsed electromagnetic fields selectively (PEMF), also known as induction heating. We therefore set out to answer the following research question: is non-contact induction heating of metallic implants effective in reducing bacterial load Titanium alloy cylinders (Ti6Al4V) were exposed to PEMF from an induction heater with maximum 2000 watts at 27 kHz after being contaminated with five different types of micro-organisms: Objectives
Methods
The aim of this study was to determine whether chilled irrigation
saline decreases the incidence of clinical upper limb palsy (ULP;
a reduction of one grade or more on manual muscle testing; MMT),
based on the idea that ULP results from thermal damage to the nerve
roots by heat generated by friction during bone drilling. Irrigation saline for drilling was used at room temperature (RT,
25.6°C) in open-door laminoplasty in 400 patients (RT group) and
chilled to a mean temperature of 12.1°C during operations for 400
patients (low-temperature (LT) group). We assessed deltoid, biceps,
and triceps brachii muscle strength by MMT. ULP occurring within
two days post-operatively was categorised as early-onset palsy.Aims
Methods
This study identifies early risk factors for symptomatic nonunion
of displaced midshaft fractures of the clavicle that aid identification
of an at risk group who may benefit from surgery. We performed a retrospective study of 88 patients aged between
16 and 60 years that were managed non-operatively. Aims
Methods
