We aimed to identify the pattern of nerve injury associated with
paediatric supracondylar fractures of the humerus. Over a 17 year period, between 1996 and 2012, 166 children were
referred to our specialist peripheral nerve injury unit. From examination
of the medical records and radiographs were recorded the nature
of the fracture, associated vascular and neurological injury, treatment
provided and clinical course.Aims
Patients and Methods
The April 2014 Wrist &
Hand Roundup360 looks at: diagnosis of compressive neuropathy; relevant reviews; the biomechanics of dorsal PIP fracture dislocation; the more strands the better; and state of mind the best predictor of outcome.
We investigated the predictive value of intra-operative
neurophysiological investigations in obstetric brachial plexus injuries.
Between January 2005 and June 2011 a total of 32 infants of 206
referred to our unit underwent exploration of the plexus, including
neurolysis. The findings from intra-operative electromyography,
sensory evoked potentials across the lesion and gross muscular response
to stimulation were evaluated. A total of 22 infants underwent neurolysis
alone and ten had microsurgical reconstruction. Of the former, one
was lost to follow-up, one had glenoplasty and three had subsequent
nerve reconstructions. Of the remaining 17 infants with neurolysis,
13 (76%) achieved a modified Mallet score >
13 at a mean age of
3.5 years (0.75 to 6.25). Subluxation or dislocation of the shoulder
is a major confounding factor. The positive predictive value and
sensitivity of the intra-operative EMG for C5 were 100% and 85.7%,
respectively, in infants without concurrent shoulder pathology.
The positive and negative predictive values, sensitivity and specificity
of the three investigations combined were 77%, 100%, 100% and 57%, respectively. In all, 20 infants underwent neurolysis alone for C6 and three
had reconstruction. All of the former and one of the latter achieved
biceps function of Raimondi grade 5. The positive and negative predictive
values, sensitivity and specificity of electromyography for C6 were
65%, 71%, 87% and 42%, respectively. Our method is effective in evaluating the prognosis of C5 lesion.
Neurolysis is preferred for C6 lesions. Cite this article:
We present the electromyographic (EMG) results
ten years after open decompression of the median nerve at the wrist
and compare them with the clinical and functional outcomes as judged
by Levine’s Questionnaire. This retrospective study evaluated 115
patients who had undergone carpal tunnel decompression at a mean
of 10.47 years (9.24 to 11.36) previously. A positive EMG diagnosis
was found in 77 patients (67%), including those who were asymptomatic
at ten years. It is necessary to include both clinical and functional results
as well as electromyographic testing in the long-term evaluation
of patients who have undergone carpal tunnel decompression particularly
in those in whom revision surgery is being considered. In doubtful
cases or when there are differing outcomes, self-administered scales
such as Levine’s Questionnaire should prevail over EMG results when
deciding on the need for revision surgery.
We reviewed 101 patients with injuries of the
terminal branches of the infraclavicular brachial plexus sustained between
1997 and 2009. Four patterns of injury were identified: 1) anterior
glenohumeral dislocation (n = 55), in which the axillary and ulnar
nerves were most commonly injured, but the axillary nerve was ruptured
in only two patients (3.6%); 2) axillary nerve injury, with or without
injury to other nerves, in the absence of dislocation of the shoulder
(n = 20): these had a similar pattern of nerve involvement to those
with a known dislocation, but the axillary nerve was ruptured in
14 patients (70%); 3) displaced proximal humeral fracture (n = 15),
in which nerve injury resulted from medial displacement of the humeral
shaft: the fracture was surgically reduced in 13 patients; and 4) hyperextension
of the arm (n = 11): these were characterised by disruption of the
musculocutaneous nerve. There was variable involvement of the median
and radial nerves with the ulnar nerve being least affected. Surgical intervention is not needed in most cases of infraclavicular
injury associated with dislocation of the shoulder. Early exploration
of the nerves should be considered in patients with an axillary
nerve palsy without dislocation of the shoulder and for musculocutaneous
nerve palsy with median and/or radial nerve palsy. Urgent operation
is needed in cases of nerve injury resulting from fracture of the
humeral neck to relieve pressure on nerves.
Peripheral nerve injury is an uncommon but serious
complication of hip surgery that can adversely affect the outcome.
Several studies have described the use of electromyography and intra-operative
sensory evoked potentials for early warning of nerve injury. We
assessed the results of multimodal intra-operative monitoring during
complex hip surgery. We retrospectively analysed data collected
between 2001 and 2010 from 69 patients who underwent complex hip
surgery by a single surgeon using multimodal intra-operative monitoring
from a total pool of 7894 patients who underwent hip surgery during
this period. In 24 (35%) procedures the surgeon was alerted to a
possible lesion to the sciatic and/or femoral nerve. Alerts were
observed most frequently during peri-acetabular osteotomy. The surgeon
adapted his approach based on interpretation of the neurophysiological changes.
From 69 monitored surgical procedures, there was only one true positive
case of post-operative nerve injury. There were no false positives
or false negatives, and the remaining 68 cases were all true negative.
The sensitivity for predicting post-operative nerve injury was 100%
and the specificity 100%. We conclude that it is possible and appropriate
to use this method during complex hip surgery and it is effective
for alerting the surgeon to the possibility of nerve injury.
This study assessed whether undergraduate performance improved following the introduction in 2006 of a musculoskeletal teaching programme lasting for seven weeks. Different methods were used to deliver knowledge and skills in trauma and orthopaedic surgery, rheumatology and allied specialties. The programme combined four main elements: traditional firm-based teaching, weekly plenary sessions, a task-based workbook and additional specialist clinics. The block of 139 students who attended in its first year were assessed using a multiple choice question examination just before their final examinations in 2008. They showed a 6% improvement in performance over a control group of 130 students assessed in 2005 before the programme had commenced. There was no difference in performance between the students assessed in 2005 and a second group of 46 students from 2008 who did not attend the new teaching programme. Performance was improved by providing more focused musculoskeletal training using available resources, as well as increasing the length of the programme.
Limb lengthening is used to correct leg length discrepancy and to increase stature. The reported frequency of peripheral nerve complications varies from 5% to 30%, but is probably underestimated. Damage may be direct or be caused by overstretching of the nerves. We have used electrophysiological tests to evaluate five patients during bilateral tibial lengthening by the Ilizarov method. Results after 24 to 107 days of lengthening showed electromyographic evidence of partial muscle denervation in all 10 limbs, with reduced motor conduction velocities in two tibial nerves and three common peroneal nerves. The sensory conduction velocity in the sural nerve was always unchanged. A clear relationship was shown between the amount of tibial lengthening and the degree of electrophysiological abnormality. Our results suggest that subclinical nerve damage is a very frequent complication of tibial lengthening.
