Aims. Total hip arthroplasty (THA) in patients with post-polio residual paralysis (PPRP) is challenging. Despite relief in pain after THA, pre-existing muscle imbalance and altered gait may cause persistence of difficulty in walking. The associated soft tissue contractures not only imbalances the pelvis, but also poses the risk of dislocation, accelerated polyethylene liner wear, and early loosening. Methods. In all, ten hips in ten patients with PPRP with fixed pelvic obliquity who underwent THA as per an algorithmic approach in two centres from January 2014 to March 2018 were followed-up for a minimum of two years (2 to 6). All patients required one or more additional soft tissue procedures in a pre-determined sequence to correct the pelvic obliquity. All were invited for the latest clinical and radiological assessment. Results. The mean Harris Hip Score at the latest follow-up was 79.2 (68 to 90). There was significant improvement in the coronal pelvic obliquity from 16.6. o. (SD 7.9. o. ) to 1.8. o. (SD 2.4. o. ; p < 0.001). Radiographs of all ten hips showed stable prostheses with no signs of loosening or migration, regardless of whether paralytic or non-paralytic hip was replaced. No complications, including dislocation or infection related to the surgery, were observed in any patient. The subtrochanteric shortening osteotomy done in two patients had united by nine months. Conclusion. Simultaneous correction of soft tissue contractures is necessary for obtaining a stable hip with balanced pelvis while treating hip arthritis by THA in patients with PPRP and fixed pelvic obliquity. Cite this article: Bone Jt Open 2021;2(9):696–704

Purpose: The serratus anterior, innervated by the Charles Bell nerve, contributes to dynamic abduction and elevation of the shoulder by stabilising the scapula on the thorax. Abduction and elevation beyond 90° or movement of the spinal border of the scapula is impossible in case of serratus anterior paralysis. Material and methods: This series included 16 patients with traumatic damage to the Charles Bell nerve leading to unique paralysis of the serratus anterior. Mean age of the patients at diagnosis was 27.5 years. Nine patients underwent scapulothoracic arthrodesis or scapulopexia and seven patients were not operated due to spontaneous total or partial recovery. Results: Initial elevation in the non operated group was 125°. At five years elevation was 145°, Constant score was 85, and shoulder abduction force was 12 kg (83% of the contralateral force). Final outcome was very good in four patients, good in one, fair in one and poor in one (the fair and poor outcomes involved severe pain for one and major loss of force for the other). Preoperative elevation in the operated group was 95°, reaching 104° at last follow-up. At four years, elevation was 104°, Constant score was 75, and shoulder abduction force was 9 kg (72% of the contralateral force). One case of infection required revision and healed satisfactorily. Outcome was very good in six patients and good in three. Discussion: Several types of treatment can be proposed: non-surgical care, muscle transfer basically with the pectoralis major, and scapulothoracic arthrodesis. The principal series reported in the literature on scapulothoracic arthrodesis concern patients with fascioscapulohumeral dystrophy and are not comparable with our series. It would be possible to compare our patients with series of post-trauma paralysis using muscle transfer which have given good results for mobility but limited improvement in global muscle force. In our patients, scapulothoracic arthrodesis gave good results in terms of muscle force, pain and overall shoulder function; mobility was fixed by the position of the scapula in the arthrodesis. We advocate this method for the treatment of serratus anterior paralysis mainly in manual labourers

Purpose: Radial paralysis is a major complication of humeral shaft fractures. In most cases, the paralysis is regressive but in certain patients surgical repair is required to achieve full neurological recovery. We reviewed retrospectively our patients to determine the causes of non-recovery and evaluate the efficacy of different treatments. Material and methods: Thirty patients were operated between 1990 and 1997 for radial nerve paralysis that was observed immediately after trauma or developed secondarily. Mean follow-up after surgery was 6.3 years. There were 22 men and 8 women, 16 right side and 14 left side. Mean delay from injury to surgery was four months (0–730 days). Elements that could be involved in radial paralysis were noted: type of fracture, level of the fracture, treatment, approach, material used. There were ten cases with non-union. Neurological recovery at three years was assessed with muscle tests and with the Alnot criteria. An electrical recording was also made in certain patients. Surgery involved neurolysis in 23 cases, nerve grafts in five and tendon transfers in two. Results: Outcome was very good and good in 22 patients, good in one and could not be evaluated in one (tendon transfer). There were three failures (two neurolysis and one graft) and two patients were lost to follow-up. After neurolysis, mean delay to recovery was seven months; it was 15 months after nerve grafts. Recovery always occurred proximally to distally. Discussion: Radial paralysis after femoral shaft fracture regresses spontaneously in 76% to 89% of the cases, depending on the series. There is a predominance in the 20 to 30 year age range. Several factors could be involved in radial paralysis (fracture of the distal third of the humerus, spiral fracture, plate fixation, nonunion). The anterolateral approach allows a better exposure of the nerve. Unlike other authors, we do no advocate exploration of the injured nerve during surgical treatment of the fracture because it is most difficult to determine the potential for recovery of a continuous nerve. Conclusion: The risk of radial nerve paralysis is greatest for spiral fracture of the distal third of the humerus. In such cases, it may be useful to explore the nerve during the primary procedure and insert a plate. For other cases, we prefer to wait for spontaneous nerve recovery. If reinnervation is not observed at 100 days, we undertake exploration

Purpose: Functional outcome after shoulder arthrodesis was evaluated to assess indications for the treatment of posttraumatic partial and total brachial plexus paralysis in adults. Material and methods: Twenty-seven patients who underwent glenohumeral arthrodesis for posttraumatic brachial plexus paralysis were reviewed. Eleven had radicular paralysis (C5, C6 and C5, C6, C7) and sixteen total paralysis. All patients recovered active elbow flexion. Shoulder reinnervation had failed in eleven patients. Before the arthrodesis, 22 patients could no use their paralysed limb. Mean time between direct neurological surgery and arthrodesis was 30 months for partial paralyses and 20 months for total paralyses. Glenohumeal screw fixation was used for the arthrodesis which was associated with an external fixation in 21. Results: Mean postoperative follow-up was 70 months. There were two cases of non-union which fused after revision and three cases of humerus fracture which occurred during the first six months after surgery. Pain related to inferior subluxation improved in six patients. There was no significant difference between the two groups for position of the fusion, or postoperative active motion (60° flexion, 60° abduction, 45° internal rotation and 7 to −9° external rotation). There was a significant difference in force which was greater for superior paralyses (11 kgf versus 7 kgf in flexion, 12 kfg versus 7 kgf in abduction, 6 kgf versus 2 kgf in external rotation and 11 kgf versus 4 kgf in internal rotation). The same was true for hand movement. The differences were statistically correlated with force of the pectoralis major. Conclusion: Glenohumeral arthrodesis provides significant improvement in function in patients with supraclavicular brachial plexus paralysis, even with a paralytic hand. Arthrodesis also allows reorienting surgical reinnervation to other functions such as hand movement. Shoulder force and hand movement are directly correlated with force of the pectoralis major

We have reported that most of lower cervical cord injury patients had either improved or remained the same neurology following early operative stabilization done in our hospital. However, a few patients deteriorated with ascending paralysis in acute stage. Purpose of this paper is to present such cases and discuss the outcomes. Methods: 1) We have analyzed 10 pts of acute lower cervical cord injury who had deteriorated neurologic symptom ascending above C4 and complicated with respiratory quadriplegia. They accounted for 3.7 % out of 271 patients with bony injury. 2) They were 8 males and 2 females, aged 17~76, injury type C5/6 fracture-dislocation (Fx/Dx) in 4, C6/7 Fx/Dx in 4, C7/T1 in 1, and one C5 flexion tear drop Fx. 3) 2 patients were treated conservatively and 8 had operative reduction and fusion with careful technique. Results: 1) All patients had complete quadriplegia. 2) 3 pts could not wean out of ventilator and other 2 of them eventually died. 3) Paralysis started to ascend in 3 days after injury needed ventilator in 24 hours thereafter. 4) 2 out of 10 patients underwent an excessive distraction being treated conservatively. 8 patients had operative fixation for bony injuries, 7 of them obtained solid spine with single operation, but one had redislocated in a few days after the operation and received restabilisation surgery. Conclusion: 1) There are a few patients of acute lower cervical injury with complete quadriplegia deteriorated neurology ascending paralysis with respiratory distress. 2) Comparing to other cases an operative treatment would not a cause of such neurologic deterioration. 3) In most cases paralysis of diaphragm was passing symptom, but quite a few patients(1%) could not wean off ventilator. 4) Cause of ascending paralysis in such injury could not be identified definitely, therefore careful observation and prompt treatment such as tracheotomy should be recommended

Aims

The aim of this study was to determine whether early surgical treatment results in better neurological recovery 12 months after injury than late surgical treatment in patients with acute traumatic spinal cord injury (tSCI).

Background: Paralysis of the crural nerve secondary to a compressive haematoma of the psoas in the pelvis is a well-known complication of anticoagulant therapy. This complication has also been described after hip or pelvic surgery. Its occurrence in a context of trauma is exceptional. Case report: A 16-year-old female adolescent sought emergency care for total deficit of knee extension. The patient had an enlarged painful knee subsequent to a skateboard fall. She reported knee trauma involving the patella and a direct shock to the homolateral hip, on the trochanter. Physical examination confirmed the knee and hip pain. Rest was advised. One and a half month after the accident, the patient again consulted for total deficit of active knee extension. The initial diagnosis suggested was posttraumatic rupture of the patellar tendon. An emergency MRI was normal, ruling out this diagnosis. More attentive physical examination revealed the presence of a complete paralysis of the quadriceps muscle by crural nerve palsy. MRI of the pelvic region revealed the presence of a voluminous haematoma of the psoas compressing the crural nerve. Emergency evacuation of the haematoma was performed. The patient underwent rehabilitation for one year and achieved progressive and complete recovery of the quadriceps function. An electromyogram obtained at one year was normal. Conclusion: This was an exceptional case of crural nerve palsy secondary to a posttraumatic haematoma of the psoas, with no notion of anticoagulation therapy. The initial knee injury was misinterpreted as involving a local patellar problem but in reality had caused a paralysis of the quadriceps muscle. MRI provided the diagnosis of psoas haematoma

A radial nerve palsy complicates 1.8 to 17% (mean 11%) diaphyseal humeral fractures (13.7% in our series of 156 humeral fractures and nonunions treated by external fixation – Tsiagadigui, 2000). In about 75%, it is a primary lesion, related to the fracture before any attempt at treatment. In 60%, the fracture, most commonly with an oblique fracture line, involves the middle third. In children, a supracondylar fracture may be complicated by radial nerve palsy. Most nerve lesions correspond to neurapraxia or axonotmesis, due to traction or compression associated with bone angular deformity. Unfrequently, the nerve is impaled or severed by bone fragments, or may be trapped within the fracture in case of a spiral oblique middle or distal third humeral fracture with lateral displacement of the distal fragment. Iatrogenic injury during internal fixation or entrapment within periosteal callus are occasionally observed. The classical indications for early radial nerve exploration include open fractures requiring surgical debridement, or fractures with vascular compromise, or when the osteosynthesis is done by a plate. In all other cases, we recommend to investigate the integrity of the radial nerve by echography. In the absence of discontinuity, spontaneous neurological recovery is likely to occur and is monitored clinically and by electromyography; prevention of joint contracture is done by physiotherapy and by a wrist splint, maintaining the joint in slight dorsiflexion. In case of persistent palsy, neurolysis is indicated several months after the initial injury, the precise delay depending on the level of the fracture. Palliative treatment by tendon transfers offers in cases of persistent palsy excellent functional results. Tendon transfers may be indicated early after the fracture, in case of an irreparable radial nerve lesion.

Study design. Retrospective study. Objectives. To identify patient outcomes, in particular employment, >5-years following traumatic thoracolumbar fracture. Methods. 235 patients between the ages of 18–65 were identified from the hospital radiology database having sustained a traumatic thoracolumbar fracture on CT or MRI between 01/01/2013 and 31/01/2017. Questionnaires were sent out via post and available emails, with a reminder letter and phone calls. Retrospective data was gathered about employment status pre-fracture and >5-years post injury. Results. 26 patients had died at follow up leaving 209 patients. 108 (52%) were treated surgically and 101 (48%) conservatively. 106 replies were received with 85 (80%) opting in and 21 (20%) opting out. 68 (80%) patients completed the full questionnaire with 17 (20%) filling out a shortened questionnaire via a phone conversation. 52 (61%) patients underwent surgery and 33 (39%) were treated conservatively. The average follow up was 8 years. Prior to injury 66 (78%) were employed and 19 (22%) unemployed (of which 6 were full time students and 8 were retired). 49 (74%) of the previously employed patients returned to work at follow up with 35 (53%) working the same or increased hours. Regarding employment, there was no significant difference between surgically and conservatively treated patients (P=0.355) or the classification of the fracture (P=0.303). 16 (19%) patients reported back pain prior to their injury whilst 69 (81%) did not. There were 58 (68%) cases of new pain at follow up with the most affected area being the lumbar region in 43 (51%) patients. 32 (38%) patients reported neurological deficit post injury: 19 with subjective symptoms, 9 with objective symptoms and 4 suffered paralysis. Conclusion. >5-years following a traumatic thoracolumbar fracture most individuals return to employment. There was no significant difference between the severity of the fracture or how patients are treated on their employment outcomes

Abstract. Background. Elderly patients with degenerative lumbar disease are increasingly undergoing posterior lumbar decompression without instrumented stabilisation. There is a paucity of studies examining clinical outcomes, morbidity & mortality associated with this procedure in this population. Methods. A retrospective analysis of aged 80–100 years who underwent posterior lumbar decompression without instrumented stabilisation at University Hospitals of Derby &Burton between 2016–2020. Results. Total 167 eligible patients, 163 octogenarians & 4 nonagenarians. Mean age was 82.78 ± 3.07 years. Mean length of hospital stay 4.79 ± 10.92 days. 76% were pain free at 3months following decompression. The average Charleston co-morbidity index (CCI) was 4.87. No association found with CCI in predicting mortality (ODD ratio 0.916, CI95%). 17patients suffered complications; dural tear (0.017%), post-op paralysis (0.017%), SSI(0.01%), and 0.001% of hospital acquired pneumonia, delirium, TIA, urinary retention, ileus, anaemia. High BMI (35+) was associated with increased incidence of complication (CI 95%, p<0.002). There was significant social drift following discharge as 147 patients went home and 4 patients to rehabilitation facility (p<0.001FE test). The mean operative time was 91.408±41.17 mins and mean anaesthetic time was 36.8±16.06 mins. Prolonged operative time was not associated with increased mortality.2year revision decompression rate was 0.011%. Conclusion. Posterior lumbar decompression without instrumented stablisation in elderly is safe & associated with low mortality with 99.5%survival at 1 year. It significantly improves PROMs & has extremely low revision rate. Incidence of post-op complication is <0.05% and 54% of patients get discharged within 72hours of surgery. Careful selection & optimising patients with high BMI would reduced perioperative morbidity and mortality

INTRODUCTION. The correct placement of pedicle screws is a major part of spine fusion and it requires experienced trained spinal surgeons. In the era of European Working Time Directive (EWTD), surgical trainees have less opportunity to acquire skills. Josh Kauffman (Author of The First 20 Hours) examined the K. Anders-Ericsson study that 10,000 hours is required to be an expert. He suggests you can be good at anything in 20 hours following 5 methods. This study was done to show the use of accelerated learning in trainees to achieve competency and confidence on the insertion of pedicle screws. METHODS. Data was collected using 3 experienced spine surgeons, 8 trainees and 1 novice (control) on the cadaveric insertion of pedicle screws over a 4 day didactic lecture in the cadaver lab. Each candidate had 2 cadavers and 156 screw placements over 4 hour shifts. Data was collected for time of pedicle screw insertion for each level on the left and right side. A pre-course and post-course questionnaire (Likert scale) was conducted. RESULTS. There were 8 candidates (surgeons) involved. 1 spinal SpR, 6 spine fellows and 1 junior consultant. A physiotherapist was the control novice. The surgeons and the control got significantly faster over time. The control made significantly more errors than the surgeons. Surgeons were significantly faster by the end (p value < 0.05). The control got faster over time and by the end, was no longer significantly slower than the surgeon when they first started. CONCLUSION. Pedicle screw insertion can cause significant morbidity, which includes paralysis. As a trainee, this is not an easy skill to acquire or practice. This focused pedicle screw course shows that a junior spinal surgeon can achieve improved competency and confidence in 20 hours but furthermore a complete novice can learn to insert pedicle screws and reach a level of competence almost at the level of the trainee in 20 hours as well

Introduction and Objective. Postoperative pain control in shoulder surgery is challenging even in arthroscopic procedures. Acute postoperative pain can last up to 48hrs despite using multimodal analgesia. Different techniques have been used to control acute pain following shoulder surgery. The most common technique currently used in shoulder surgery at the elective orthopaedic centre in Leeds is a combination of general anaesthetic (GA) and interscalene block (ISB). ISB maybe very effective, however, carries many risks and potential side effects such as brachial plexus injury and paralysis of the vagus and laryngeal recurrent nerves as well as cervical sympathetic nerve and pneumothorax. ISB can also be associated with higher incidence of neurological deficit compared to other peripheral nerve blocks; up to 14% at 10 days in some cases. As such we decided to examine the use of ISB for achieving pain control in our elective unit. Materials and Methods. A prospective consecutive series of 217 patients undergoing shoulder surgery were studied. These were grouped into 10 groups. All procedures were arthroscopic apart from shoulder arthroplasty procedures such as hemiarthroplasty and total shoulder replacements (TSRs). The choice of regional anaesthesia was ISB with GA as standard practice. Visual analogue scores (VAS) at 0hrs, 1hr, 2hrs, 4hrs and 6hrs; and total opiates intake were recorded. A one-way single factor ANOVA was used as preferred statistical analytical method to determine whether there is a difference in VAS scores and total opiates intake amongst the groups. Postoperative analgesics were used for pain relief, although these were not standardised. Results. In total shoulder replacement group, although the RSR group used more morphine on average compared to the ASR group (Mean morphine intake 6.5mg vs 3mg), this was not statistically significant (F<Fcrit; p value= 0.19). When comparing all the arthroplasty groups, the difference in mean morphine intake was also statistically not significant (F<Fcrit; p value=0.24). However, when comparing all 10 groups’ morphine intake there was a statistically significant difference amongst these groups (F>F crit; p value=0.03). Interestingly, there was a statistically significant difference in VAS at 0hrs (F>Fcrit p value=0.01); 1hrs (F>Fcrit; p value=0.00), and at 6hrs (F>Fcrit; p value=0.02) when comparing all 10 groups. Conclusions. ISB is an effective technique in achieving pain control in shoulder surgery; however, there are still variations in analgesic needs amongst groups and the use of alternative techniques should be thus explored. A future prospective study looking at acute pain for a longer period of time after shoulder surgery would explore the effectiveness of ISB in achieving pain control consistent with rehabilitation requirements

The foot and ankle are very commonly affected in various paralytic conditions. Paralysis of different muscles acting on the foot results in characteristic gait aberrations. The gait abnormalities are a result of one or more of the consequences of paralysis including: loss of function, muscle imbalance, deformity and instability of joints. The aims of treatment of the paralysed foot and ankle are to: make the foot plantigrade, restore active dorsiflexion during the swing phase of gait (if this is not possible then prevent the foot from ‘dropping’ into plantar flexion during swing), ensure that the ankle and subtalar joints are stable throughout the stance phase of gait, facilitate a powerful push-off at the terminal part of the stance phase (if this is not possible, at least prevent a calcaneal hitch in terminal stance). The specific aims of treatment in each patient depend on the pattern and the severity of paralysis that is present and hence the aims are likely to vary. In order to determine what treatment options are available in a particular patient, it is imperative that a careful clinical assessment of the foot is done. Based on the clinical assessment, these questions need to be answered before planning treatment: What are the muscles that are paralysed What is the power of each muscle that is functioning? Is there muscle imbalance at the ankle, subtalar or midtarsal joints that has either already produced a deformity or has the potential to produce a deformity in future? Are there any muscles of grade V power that can be spared for a tendon transfer without producing a fresh imbalance or instability. To facilitate responses to these questions, the muscle power of each muscle can be charted on a template that facilitates graphic representation of the muscle balance around the axes of the ankle and subtalar joints. This assessment clarifies whether a tendon transfer is a feasible option. If a tendon transfer is considered feasible, then the following questions also need to be answered: Is there a fixed, static deformity that needs to be corrected prior to a tendon transfer? If a tendon transfer was performed, would the child be capable of comprehending and cooperating with the post-operative muscle re-education programme?. The decision-making process will be outlined and the use of the template in choosing the tendon transfer and deciding the site of anchorage of the transferred tendon will be explained. With suitable examples the choice of tendon transfers in different patterns of paralysis would be illustrated

Purpose of the study: Among the causes of secondary congenital equinovarus club foot, neurological disorders predominate. The entity we examine here corresponds to irreversible pure motor paralysis with no sensorial disorder affecting the lateral compartment predominantly and sometimes associated with involvement of the anterior compartment. There is no literature on this entity. Beyond the question of the aetiology, the demonstration of this pathological condition can modify therapeutic strategy in order to prevent recurrence. Material and methods: We examined 42 congenital equinovarus club feet with persistent pure motor paralysis involving the lateral compartment and sometimes the anterior compartment with a mean 10 years follow-up. The Dimeglio classification was used and an analytical muscle score was noted for each patient. Complementary tests included an electromyogramme when possible. Conservative treatment was the rule either using a functional method or the Ponseti method; surgery was then proposed when necessary for posteromedial release with or without palliative muscle transfer. The following procedures were performed: posteromedial release (n=33) and muscle transfer (n=26): tibialis posterior (n=22), tibialis anterior (n=3); hemisoleus (,n=1); tibialis posterior associated with flexor digitorum longus (n=3). Results: Conservative treatment was used for all feet but all presented recurrence and required secondary surgery (33 posteromedial releases and 26 muscle transfers). Discussion: This study opens the discussion on the similarity between idiopathic and arthrogryoposis club foot since the electromyography sometimes reveals an anomaly of the anterior horn. Thus club foot with pure motor and persistent paralysis involving the lateral and/or anterior compartment will not respond sufficiently to nocturnal contention if an adapted muscle transfer is not associated. Conclusion: Muscle transfer to reactivate dorsal flexion of the foot enables a better functional outcome. First intention conservative treatment can be instituted while waiting for potential recovery. If the paralysis persists beyond one year, muscle transfer is indicated before the deformity recurs and requires an associated posteromedial release

Purpose: We have sometimes observed paralysis of the long portion of the triceps in patients operated after traumatic damage to the axillary nerve. In anatomy textbooks, the motor branch of the long portion of the triceps arises from the radial nerve within the triceps. We studied the position of the motor branch of the long portion of the triceps in order to better detail its origin. Material and methods: Group I: this group included nine patients with trauma-induced lesions of the axillary nerve associated with clinical involvement of the long portion of the triceps. Group II: this group was composed of 20 cadaver specimens of the secondary posterior trunks. Group III: fif-teen approaches to the subclavian plexus with dissection of the secondary posterior trunk. Lesions to the axillary nerve were retrieved from the operation reports in group I. The origin of the motor branch of the long portion of the triceps was identified in group II. The same origin was identified by neurostimulation in group III. Results: In group I there were six lesions of the axillary nerve situated a mean 10 mm from the division of the secondary posterior trunk and three lesions of the secondary posterior trunk. There were four type IV lesions and five type V lesions. In group II, the motor branch of the long portion of the triceps arose a mean 6 mm from the division of the secondary posterior trunk in 13 cases, at the division in five cases, and 10 mm downstream in two cases, but never from the radial nerve. In group III, the branch of long portion of the triceps arose a men 4.5 mm from the division of the secondary posterior trunk in 11 cases, and at the division in four cases, but never from the radial nerve. Discussion: In patients with trauma to the axillary nerve with paralysis of the long portion of the triceps, lesions to the axillary nerve occur proximally and are severe. In our study, the motor branch of the long portion of the triceps always arose from the axillary nerve or the secondary posterior branch. This shows that paralysis of the long portion of the triceps is a sign of poor prognosis in patients with traumatic lesions to the axillary nerve. This association is for us an element in favour of a proximal and serious lesion to the axillary nerve. Conclusion: Involvement of the long portion of the triceps must be searched for in patients with traumatic lesions to the axillary nerve. Paralysis of the long portion of the triceps is a sign of a serious lesion requiring early surgical repair before two months

Posterior interoseous nerve (PIN) syndrome is an entrapment of the deep branch of the radial nerve just distal to the elbow joint. It may result in the paresis or paralysis of the fingers and thumb extensor muscles. We present a review of 26 cases of PIN entrapment syndrome, diagnosed an treated over a ten years period form 1996 to 2005. Their ages ranged form 12 to 57 years, they were 18 men and 8 women. The interval between, the onset or paralysis and operation ranged from 4 months to 1 year. All the patients were diagnosed preoperatively as having PIN palsy from physical examination and electromyographic (EMG) studies of the posterior interoseous innervated muscles and all were treated by operation. The cause of compression was, ganglia in four cases, fascia thickening at the arcad of frohse in six cases, the radial recurrent vessels in three cases, lipoma in four cases, dislocated head of the radius in two cases, infamed synovium in four cases, tumour in two cases, and Intraneural Perineurioma in one case. The periods of postoperative observation were from 1 to 10 years. The paralysis recovered completely by the six postoperative months in all cases except one girl with intraneural peri-neurioma. Three patients developed mild reflex sympathetic dystrophy which resolved with physiotherapy and auxilary blocks. Two patients developed hyperaesthesia in the distribution of the superficial radial nerve which recovered in a few weeks. Having arrived at a diagnosis of PIN syndrome, it is important to select the correct level for the release of the radial nerve. Fair or poor results can be due to incorrect diagnosis, incomplete release or irreversible nerve injury

Purpose: Isolated paralysis of the great toe long extensor is a rare complication of leg fractures. In certain patients, an erroneous diagnosis of compartment syndrome or muscle incarceration may be made. Material and methods: We dissected ten fresh cadavers. Results: The great toe long extensor was innervated by a branch of the deep fibular nerve which arose 15 cm from the talocrural joint space and directly in contact with the periosteum of the tibial shaft. In this localisation, the branch can be directly sectioned during trauma, reduction, or reaming. Discussion: We had one patient aged 30 years with a fracture of the mid third of the leg who was treated by centromedullar nailing. Postoperatively, this patient developed isolated paralysis of the great toe long extensor. The isolated neurogenic origin of this paralysis was confirmed by electromyography. Conclusion: This case is illustrative of direct injury of the great toe long extensor innervation, a cause which to our knowledge has not been previously described

Photodynamic therapy (PDT) is a promising new treatment for spinal metastases; however, the effects of PDT on bone are largely unknown. This study assessed the impact of PDT on spinal stability in rats at high (non-therapeutic) drug and LASER light doses. Spinal stability was assessed using stereological measures attained from in vitro μCT scans. High doses of PDT were shown to cause a reduction in vertebral density. Postoperative paralysis was also noted in a subset of animals treated. Tumour-involved vertebrae are already mechanically weakened; as such it is essential to establish a safe and efficacious therapeutic window for vertebral PDT. This study assessed the effect of high doses of photodynamic therapy (PDT) on biomechanical stability and bone density of lumbar vertebrae. PDT can cause damage to the vertebral bone and induce paralysis when treatment is applied at very high doses in the rat spine. PDT is a promising new treatment for spinal metastases however, it is important to understand its effect on vertebral bone in order to closely define the therapeutic window for safety and efficacy. Trabecular bone density decreased from L1–L3 in normal, untreated rats. The L2 vertebra when treated with high dose PDT was shown to have decreased bone density as compared to both L1 and L3. As expected, tumour-bearing rats had lower vertebral densities than normals. Rnu/Rnu rats were separated into normal controls, normals treated with PDT and tumour-bearing rats. Rats treated with PDT received an intercardiac injection of 2.5mg/Kg BPD-MA. The drug was activated through administration of 500J (300mA) of a non-thermal 690nm LASER adjacent to the L2 vertebral body. After one week, in vitro μCT scans were taken of L1–L3 and stereological quantities measured. The demonstrated reduction of bone density as quantified one week following treatment is important when considering spinal stability in the potential use of PDT to treat vertebral metastases. We have observed that the therapy can induce paralysis when treatment is applied at high doses in the rat spine. The intermediate and long-term effects of PDT on bone remain unknown and require ongoing study

(Case) 79-year-old woman. Past history, in 1989, right femur valgus osteotomy. in 1991, THA at left side. Follow-up thereafter. Hyaluronic acid injection for both knee osteoarthritis. (Clinical course)Her right hip pain getting worse and crawling indoors from the beginning of July 2013. We did right hybrid THA at August 2013(posterior approach, TridentHA cup, Exeter stem, Biolox Forte femoral head 28mm). But immediately, she dislocated twice than the third day after surgery because she became a delirium. It has been left by nurse for about 6 hours because of the midnight after the second dislocation. Next morning, check the dislocation limb position, closed reduction wasdone under intravenous anesthesia. As a result of waking up from the anesthesia, and complained of paralysis and violent pain in the right leg backward. A right lower extremity nerve findings, there is pain in the lower leg after surface about the calf, there was no apparent perception analgesia. Toe movement is weak, but the G-toe planter anddorsiflexion possible about M2, and neurological symptoms to relieved by flexion(above 70 degrees) of the right hip joint. Therefore, we thought that she suffered anterior dislocation of the sciatic nerve by the stem neck (retraction), judged to closed reduction was impossible, open reduction surgery was performed after waitingat hip flex position. But paralysis is gradually worsened during waiting surgery, toes movement had become impossible to operating room admission. Sciatic nerve is caught in front of the stem neck as expected, operative findings were able to finally reduction after removing the femoral head after dislocation. Anteversion of the cup was changed to 25 degrees from 15 degrees, and changed to 32mm diameter metal head and polyethylene liner. And we needed Intensive Care Unit(ICU) management after surgery for prevent recurrence of dislocation. Fitted with a hip brace for her, has not been re-dislocation. The sciatic nerve palsy improved in three months after the operation, the patient became able to walk without a cane. (Summary) We experienced a rare case suffered anterior dislocation of the sciatic nerve by the stem neck, and she had a good result after open reduction surgery

Aims

The escalating demand for medical resources to address spinal diseases as society ages is an issue that requires careful evaluation. However, few studies have examined trends in spinal surgery, especially unscheduled hospitalizations or surgeries performed after hours, through large databases. Our study aimed to determine national trends in the number of spine surgeries in Japan. We also aimed to identify trends in after-hours surgeries and unscheduled hospitalizations and their impact on complications and costs.