Endoscopic Release of the Ulnar Nerve at the Elbow: Technique Description and Case Series / Liberação endoscópica do nervo ulnar no cotovelo: Descrição da técnica e série de casos

Abstract Objective The endoscopic release of the ulnar nerve reproduces a simple (in situ) procedure with smaller incisions, less soft tissue damage, and higher preservation of nerve vascularization. Endoscopy allows the clear visualization of the entire path of the nerve and surrounding noble structures. Moreover, it reveals any signs of compression and allows a safe release of 10cm distally or proximally to the medial epicondyle. Methods A retrospective survey revealed that 15 subjects (1 with a bilateral injury) underwent an ulnar nerve compression release at the elbow using the endoscopic technique with Agee (Micro-Aire Sugical Instruments, Charlottesville, VA, EUA) equipment from January 2016 to January 2020. Results Symptoms of ulnar nerve compression improved in all patients; on average, they resumed their work activities in 26.5 days. There was no recurrence or need for another procedure. In addition, there were no severe procedure-related complications, such as infection and nerve or vascular injury. One patient had transient paresthesia of the sensory branches to the forearm, with complete functional recovery in 8 weeks. Conclusion Our study shows that the endoscopic release of the ulnar nerve at the elbow with the Agee equipment is a safe, reliable technique with good outcomes.

Resumo Objetivo A liberação endoscópica do nervo ulnar permite reproduzir uma liberação simples (in situ), mas através de incisões menores e com menor lesão de partes moles e uma maior preservação da vascularização do nervo. A visualização clara através da endoscopia permite observar todo o trajeto do nervo e das estruturas nobres circundantes, mostrando os sinais de compressão, possibilitando realizar a liberação de forma segura em um trajeto de 10 cm nos sentidos distal e proximal ao epicôndilo medial. Método Foram encontrados, de forma retrospectiva, no período entre janeiro de 2016 e janeiro de 2020, 15 pacientes (sendo 1 com lesão bilateral) submetidos a liberação da compressão do nervo ulnar no cotovelo pela técnica endoscópica com equipamento de Agee (Micro-Aire Sugical Instruments, Charlottesville, VA, EUA). Resultados Todos os pacientes tiveram melhora dos sintomas de compressão do nervo ulnar e o período de retorno ao trabalho foi de em média 26,5 dias. Não houve recidivas e não houve a necessidade de outro procedimento. Também não houve complicações graves decorrentes do procedimento, como infecção, lesão nervosa ou vascular. Em um paciente, houve parestesia transitória dos ramos sensitivos para o antebraço, com retorno completo da função em 8 semanas. Conclusão Os resultados mostram que a liberação endoscópica do nervo ulnar no cotovelo comoequipamentodeAgeeéuma técnica segura, confiável e com bons resultados.

Endoscopic Cubital Tunnel Release in Leprosy Neuritis of the Ulnar Nerve / Liberação endoscópica do túnel cubital na neurite hansênica do nervo ulnar

Abstract Objectives To better characterize the role of endoscopic cubital tunnel release in leprosy neuritis and determine whether there is an improvement in pain, sensitivity, and strength with the use of this minimally invasive technique. Methods A total of 44 endoscopic procedures for ulnar nerve decompression at the elbow were performed in patients who were previously diagnosed with leprosy neuritis. The inclusion criteria were surgical indication for ulnar nerve release and clinical treatment failure for 4 weeks in patients with cubital tunnel syndrome who had their ulnar nerve function, whether motor or sensitive, deteriorated progressively despite the treatment with prednisone 1 mg/kg/day and physiotherapy. For endoscopic release, the CTS Relief Kit (Linvatec. Largo, FL, USA) and a standard 4mm 30° arthroscope were used. Results The study included 39 patients, 29 (74.4%) males and 10 (25.6%) females. The age of the patients ranged from 12 to 64 years (33 ± 14.97). Five patients underwent bilateral release. The release demonstrated a statistically significant improvement in pain (p 0.002), in sensitivity (p< 0.001), and in strength (p< 0.001). The best results were obtained when ulnar release was performed less than 6 months after surgery indication. None of the procedures were converted from endoscopic to open. No major complications (infection, vascular injury, and nervous injury) were reported. One patient had ulnar nerve subluxation. Conclusion The endoscopic release of the ulnar nerve at the elbow in leprosy neuritis entails true and safe benefits for the patient, such as improvement in pain, sensitivity and strength.

Resumo Objetivos Os objetivos deste estudo foram caracterizar melhor o papel da liberação endoscópica do túnel cubital na neurite hansênica e determinar se há melhora da dor, sensibilidade e força com esta técnica minimamente invasiva. Métodos Um total de 44 procedimentos endoscópicos para descompressão do nervo ulnar no cotovelo foram realizados em pacientes previamente diagnosticados com neurite por hanseníase. Os critérios de inclusão foram indicação cirúrgica para liberação do nervo ulnar e insucesso do tratamento clínico por 4 semanas em pacientes com síndrome do túnel cubital que sofreram deterioração progressiva da função motora ou sensitiva do nervo ulnar apesar do tratamento de 1 mg/kg/dia de prednisona e fisioterapia. A liberação endoscópica foi realizada com CTS Relief Kit (Linvatec. Largo, FL, EUA) e um artroscópio padrão de 4 mm e 30°. Resultados O estudo incluiu 39 pacientes, sendo 29 (74,4%) homens e 10 (25,6%) mulheres. A idade dos pacientes variou de 12 a 64 anos (33 ± 14,97). Cinco pacientes foram submetidos à liberação bilateral. A liberação provocou melhora estatisticamente significativa de dor (p= 0,002), sensibilidade (p <0,001) e força (p <0,001). Os melhores resultados foram obtidos quando a liberação ulnar foi realizada em menos de 6 meses após a indicação da cirurgia. Nenhum procedimento foi convertido de endoscópico para aberto. Não foram relatadas complicações maiores (infecção, lesão vascular e lesão nervosa). Um paciente apresentou subluxação do nervo ulnar. Conclusão A liberação endoscópica do nervo ulnar no cotovelo na neurite hansênica traz benefícios verdadeiros e seguros para o paciente, como melhora da dor, sensibilidade e força.

Application of ulnar nerve diameter changes examined by HRUS in patients with cubital tunnel syndrome / 中国骨伤

OBJECTIVE@#To evaluate the value of high-resolution ultrasound the diagnosis and prognosis of cubital tunnel syndrome.@*METHODS@#From January 2018 to June 2019, 47 patients with cubital tunnel syndrome were treated with ulnar nerve release and anterior subcutaneous transposition. There were 41 males and 6 females, aged from 27 to 73 years old. There were 31 cases on the right, 15 cases on the left, and 1 case on both sides. The diameter of ulnar nerve was measured by high-resolution ultrasound pre-and post-operatively, and measured directly during the operation. The recovery status of the patients was evaluated by the trial standard of ulnar nerve function assessment, and the satisfaction of the patients was assessed.@*RESULTS@#All the 47 cases were followed up for an average of 12 months and the incisions healed well. The diameter of ulnar nerve at the compression level was (0.16±0.04) cm pre-operatively, and the diameter of ulnar nerve was (0.23±0.04) cm post-operatively. The evaluation of ulnar nerve function:excellent in 16 cases, good in 18 cases and fair in 13 cases. Twelve months post-operatively, 28 patients were satisfied, 10 patients were general and 9 patients were dissatisfied.@*CONCLUSION@#The preoperative examination of ulnar nerve by high-resolution ultrasound is consistent with the intuitive measurement during operation, and the result of postoperative examination of ulnar nerve by high-resolution ultrasound is consistent with follow-up results. High-resolution ultrasound is an effective auxiliary method for the diagnosis and treatment of cubital tunnel syndrome.

Liberación endoscópica del túnel cubital. Técnica y resultados clínico-funcionales / Endoscopic release of the ulnar tunnel. Technique and clinical-functional outcomes

Resumen: Introducción: El síndrome del túnel cubital es la segunda neuropatía por compresión de la extremidad superior, seguido del síndrome del túnel del carpo, por lo que es un motivo de consulta frecuente dentro de la cirugía de mano. Existen pocos estudios publicados acerca de la técnica endoscópica. Material y métodos: Se incluyeron 26 pacientes con el diagnóstico clínico y electromiográfico de síndrome de túnel cubital, en quienes se realizó liberación endoscópica del túnel cubital. Nueve (35%) fueron mujeres y 17 (65%) hombres. Se utilizó la clasificación de McGowan modificada y la clasificación de Wilson y Krout para analizar las características de las variables en su estado prequirúrgico y postquirúrgico. Resultados: Posterior a la intervención, obtuvimos 18 pacientes (69%) con resultado excelente, seis (24%) con un buen resultado y dos (7%) con resultados regulares o aceptables, obteniendo una p significativa con un valor < 0.05. Conclusión: La liberación endoscópica del túnel cubital se considera una técnica segura, con buenos resultados.

Abstract: Introduction: The ulnar tunnel syndrome is the second compressive neuropathy, followed by the carpal tunnel, making it a frequent reference in hand surgery. There are few published studies about endoscopic technique. Material and methods: We studied 26 patients with ulnar tunnel syndrome diagnosis, were operated by endoscopic release of the ulnar tunnel. Nine women (35%) and 17 (65%) male patients. We used the modified McGowan, and the Wilson and Krout classification to analyze preoperative and postoperative variables. Results: After endoscopic decompression we obtained 18 patients (69%) with excellent evolution, 6 (24%) with good evolution, and 2 (7%) with acceptable outcome. We obtained a significant p of < 0.05. Conclusion: Endoscopic decompression of the ulnar tunnel is a safe technique, less invasive and with good outcome.

Epidemiology and Estimated Cost of Surgery for Cubital Tunnel Syndrome Conducted by the Unified Health System in Brazil (2005­2015)

Introduction Cubital tunnel syndrome (CTS) is responsible for one of the types of ulnar nerve neuropathy and is the second cause of compressive neuropathy of the upper limb, only surpassed by carpal tunnel syndrome. Objective To describe the epidemiological data of the ulnar nerve transposition surgical code in the treatment of CTS by the United Health System (SUS) from 2005 to 2015. Methodology This is a descriptive epidemiological study, in which data were obtained through consultation of the DATASUS database. Results/Discussion During this period, 774 procedures were performed and, despite the addition of 20.3 million people to the Brazilian population, the incidence was 0.33/ 1,000,000. National and international epidemiology point to a slightly higher prevalence of the procedure between men, in the fourth and fifth decades of life. Low permanence rate, as well as the absence of hospital deaths related to the procedure, infer that the procedure is safe, with low morbidity and mortality rates. Conclusion The annual incidence of the cubital syndrome submitted to surgical treatment at SUS in the Brazilian population was 1/7,670,833 in 2005 and½,174,468 in 2015. The cost of each surgical procedure during the same period ranged from R$ 318.88 to R$ 539.74. The mean hospitalization time for CTS surgery was 1.85 days.

Cubital Tunnel Syndrome by a Ganglion Cyst in an Amateur Tennis Player / 대한스포츠의학회지

Ganglion cyst is considered to be a usual cause of peripheral nerve compression. In this report, we present a rare case of ulnar nerve compression by a multi-septated ganglion cyst in the cubital tunnel. A 33-year-old left-handed male amateur tennis player developed progressive numbness and weakness in his right elbow, forearm, and hand for 1 year. Decrease of grip power was apparent in left hand. Clinical examination revealed a cystic mass at the posterior side of the elbow. Magnetic resonance imaging identified a ganglion cyst at the elbow. During surgery about 3 cm diameter epineural ganglion was observed compressing the ulnar nerve and was excised using microsurgery techniques. Three months postoperatively, the clinical recovery of the patient was very satisfactory and he restored his original performance in tennis match.

Outcome of adjustable suspensory fixation for femoral graft in acl reconstruction

Background: The incidence of torn anterior cruciate ligament (ACL) has greatly increased, with today's increasing enthusiasm for sports activities. As a result, reconstruction of the torn anterior cruciate ligament became a common surgical procedure in orthopaedic surgery. Objective: To evaluate short term clinical outcome of adjustable suspensory fixation for femoral graft in ACL reconstruction. Methods: All patients treated for ACL reconstruction with an ipsilateral hamstring between March 2017 and March 2018 were evaluated. Subjects were assigned to TightRope™ (TR) femoral fixation. All patients were evaluated with the Lachman test, pivot-shift test, 2000 International Knee Documentation Committee (IKDC) knee examination. The subjective evaluation was performed using the Lysholm knee score. CT examination was performed to evaluate femoral and tibial tunnels enlargement at four different levels. All patients were assessed at a 12 month follow-up visit. Power analysis was performed a priori in accordance with the femoral and tibial tunnels enlargement values from the CT scans. Results: The group was homogenous at baseline with regard to age, gender, BMI, dominance and disease duration. At the final follow-up, no statistically significant differences were found according to subjective and objective clinical outcome measures. According to the femoral tunnel enlargement, no statistically significant difference was found between tunnel at operation and 12 months later. Conclusion: In transtibial ACL reconstruction, the use of adjustable-loop length device products, on the femoral side, led to better clinical and radiological results

Prevalência da síndrome do túnel cubital em trabalhadores portuários de São Sebastião, São Paulo / Prevalence of cubital tunnel syndrome among dock workers, Saint Sebastian, São Paulo, Brazil

Introdução: Os portos brasileiros têm um papel importante na economia do país. Apesar de haver um número expressivo de trabalhadores, existem poucas pesquisas disponíveis envolvendo o ambiente portuário que relatem que as doenças musculoesqueléticas mais recorrentes correspondem as dos membros superiores, como síndrome do túnel do carpo, síndrome do manguito rotador, cervicalgia e síndrome do túnel cubital, esta definida como uma neurite causada por uma compressão do nervo ulnar no túnel cubital na região do cotovelo. Objetivo: Estimar a prevalência sugestiva da síndrome do túnel cubital no ambiente portuário. Método: Foram avaliados 72 trabalhadores portuários avulsos do OGMO do Porto de São Sebastião, São Paulo, por meio de um questionário semiestruturado, o exame clínico que incluiu a pesquisa de dor à palpação na região medial do cotovelo e a realização de duas manobras específicas para síndrome do túnel cubital, o teste provocativo de pressão e o teste de flexão máxima. Resultados: A idade média foi de 48,49 anos e um tempo médio de 23,13 anos de trabalho no porto; a síndrome do túnel cubital teve diagnóstico sugestivo em cinco dos avaliados, e apenas dois trabalhadores referiam dor no cotovelo antes e três depois do início do trabalho no porto. Conclusão: A prevalência do diagnóstico sugestivo da síndrome do túnel cubital foi de 6,9%, sendo maior entre os trabalhadores com maior tempo de trabalho (acima de um ano)

Background: Ports play a substantial role in the Brazilian economy. Despite the large number of port workers, few studies report that the most common musculoskeletal disorders among them involve the upper limbs, including carpal tunnel syndrome, rotator cuff syndrome, cervicalgia and cubital tunnel syndrome. The latter is a neuritis caused by compression of the ulnar nerve at the cubital tunnel (CuTS) on the elbow. Objective: To estimate the prevalence of a suggestive diagnosis of CuTS among port workers. Method: Seventy-two independent port workers registered with the Labor Management Organ (Órgão Gestor de Mão de Obra ­ OGMO), Port of Saint Sebastian, were evaluated based on a semi-structured questionnaire and clinical examination, including investigation of pain on palpation of the middle area of the elbow and two maneuvers specific for CuTS, namely, the pressure provocation and maximal flexion tests. Results: The average age of the participants was 48.49 years old, and their average length in the job 23.13 years. Suggestive diagnosis of CuTS was established for five participants. In only two cases elbow pain had begun before, and in three after starting work at the port. Conclusion: The prevalence of a suggestive diagnosis of CuTS was 6.9%, and was higher among the participants with longer length in the job (over one year)

Cubital Tunnel Syndrome Caused by Anconeus Epitrochlearis Muscle

OBJECTIVE: We evaluated the clinical manifestation and surgical results following operative treatment of cubital tunnel syndrome (CuTS) caused by anconeus epitrochlearis (AE) muscle. METHODS: Among 142 patients who underwent surgery for CuTS from November 2007 to October 2015, 12 were assigned to the AE group based on discovery of AE muscle; 130 patients were assigned to the other group. We analyzed retrospectively; age, sex, dominant hand, symptom duration, and weakness in hand. Severity of the disease was evaluated using the Dellon classification and postoperative symptom were evaluated using disability of arm shoulder and hand (DASH) and visual analogue scale (VAS) scores. Surgery consisted of subfascial anterior transposition following excision of AE muscle. RESULTS: AE muscle was present in 8.5% of all patients, and was more common in patients who were younger and with involvement of their dominant hand; the duration of symptom was shorter in patients with AE muscle. All patients showed postoperative improvement in symptoms according to DASH and VAS scores. CONCLUSION: The possibility of CuTS caused by AE muscle should be considered when younger patients have rapidly aggravated and activity-related cubital tunnel symptoms with a palpable mass in the cubital tunnel area. Excision of AE muscle and anterior ulnar nerve transposition may be considered effective surgical treatment.

Cubital Tunnel Syndrome Caused by Anconeus Epitrochlearis Muscle

OBJECTIVE: We evaluated the clinical manifestation and surgical results following operative treatment of cubital tunnel syndrome (CuTS) caused by anconeus epitrochlearis (AE) muscle.METHODS: Among 142 patients who underwent surgery for CuTS from November 2007 to October 2015, 12 were assigned to the AE group based on discovery of AE muscle; 130 patients were assigned to the other group. We analyzed retrospectively; age, sex, dominant hand, symptom duration, and weakness in hand. Severity of the disease was evaluated using the Dellon classification and postoperative symptom were evaluated using disability of arm shoulder and hand (DASH) and visual analogue scale (VAS) scores. Surgery consisted of subfascial anterior transposition following excision of AE muscle.RESULTS: AE muscle was present in 8.5% of all patients, and was more common in patients who were younger and with involvement of their dominant hand; the duration of symptom was shorter in patients with AE muscle. All patients showed postoperative improvement in symptoms according to DASH and VAS scores.CONCLUSION: The possibility of CuTS caused by AE muscle should be considered when younger patients have rapidly aggravated and activity-related cubital tunnel symptoms with a palpable mass in the cubital tunnel area. Excision of AE muscle and anterior ulnar nerve transposition may be considered effective surgical treatment.

Accuracy of Preoperative Ultrasonography for Cubital Tunnel Syndrome: A Comparison with Intraoperative Findings

BACKGROUND: The aim of this study was to assess the consistency between preoperative ultrasonographic and intraoperative measurements of the ulnar nerve in patients with cubital tunnel syndrome. METHODS: Twenty-six cases who underwent anterior transposition of the ulnar nerve for cubital tunnel syndrome were enrolled prospectively. On preoperative ultrasonography, largest cross-sectional diameters of the ulnar nerve were measured at the level of medial epicondyle (ME) and 3 cm proximal (PME) and distal (DME) to the ME on the transverse scan by a single experienced radiologist. Intraoperative direct measurements of the largest diameter at the same locations were performed by a single surgeon without knowledge of the preoperative values. The consistency between ultrasonographic and intraoperative values including the largest diameter and swelling ratio were assessed. RESULTS: Significant differences between ultrasonographic and intraoperative values of the largest diameter were found at all levels. The mean difference was 1.29 mm for PME, 1.38 mm for ME, and 1.12 mm for DME. The mean ME-PME swelling ratio for ultrasonographic and intraoperative measurements was 1.50 and 1.39, respectively, showing significant difference. The mean ME-DME swelling ratio for ultrasonographic and intraoperative measurements was 1.53 and 1.43, respectively, showing no significant difference. CONCLUSIONS: Ultrasonographically measured largest diameters of the ulnar nerve at any levels were smaller than the real values determined intraoperatively. The ME-DME swelling ratio of the ulnar nerve measured by ultrasonography was consistent with the intraoperative measurement.

Modified simple decompression in the treatment of cubital tunnel syndrome: avoiding ulnar nerve subluxation / Descompressão simples modificada no tratamento da síndrome do túnel cubital: evitando subluxação do nervo ulnar

ABSTRACT Objective In this study, we propose a modification to the simple decompression technique that contains the ulnar nerve in the cubital fossa, thus preventing subluxation during forearm flexion movements. Methods Five consecutive patients with leprosy-associated cubital tunnel syndrome underwent surgery with the modified technique between July 2011 and October 2012. Results The most common symptoms were neuropathic pain and sensory changes (both 60%). On the McGowan scale, three patients maintained their preoperative score and two patients improved by two points, while on the Louisiana State University Health Sciences Center scale, two patients maintained the same scores, two improved by two points, and one improved by one point. Four patients were able to discontinue corticosteroid use. The mean follow-up time was 25.6 months (range 2-48 months). There were no recurrences or subluxations in the long-term. Conclusion This alternative technique resulted in excellent functional results, as well as successful withdrawal from corticosteroids. Furthermore, it resulted in no ulnar nerve subluxations.

RESUMO Objetivo Neste manuscrito apresentamos uma modificação da técnica de descompressão simples do nervo ulnar no túnel cubital que impede a subluxação do nervo em movimentos de flexão do antebraço. Métodos Foram incluídos cinco pacientes consecutivos acometidos por síndrome do túnel cubital (Hanseníase) submetidos à cirurgia entre 2011 e 2012. Resultados Os sintomas mais comuns foram dor neuropática e alterações sensitivas (60%). No pós-operatório, três pacientes mantiveram o mesmo escore e dois melhoraram dois pontos na escala de McGowan, enquanto na escala Louisiana State University Health Sciences Center, dois pacientes mantiveram o mesmo escore, dois melhoraram dois pontos e um melhorou um ponto. Os corticosteróides foram descontinuados em quatro pacientes. O tempo médio de seguimento foi 25,6 meses (variação 2-48 meses). Não foram observadas recorrência ou subluxação no longo prazo. Conclusões A técnica alternativa apresentou excelentes resultados funcionais e foi bem sucedida na retirada dos corticosteróides. Ademais, subluxações do nervo ulnar não foram observadas.

The Relationship between Early Improvement of Subjective Symptom and Surgical Outcomes in Moderate to Severe Cubital Tunnel Syndrome / 대한정형외과학회잡지

PURPOSE: Moderate to severe cubital tunnel syndrome usually requires surgical treatment. Most surgical outcomes are evaluated 6 months after the procedure; however, subjective symptoms begin to show improvement much earlier. In this study, we explored whether patients who experience early improvement of subjective symptoms have different clinical characteristics and surgical outcomes than those without early improvement. MATERIALS AND METHODS: Between January 2012 and February 2015, 36 surgical cases of moderate- to severe-stage cubital tunnel syndrome (modified McGowan grade IIA, IIB, or III) were included. Nineteen patients (15 males and 4 females with a mean age of 54.3±12.0 years) reported subjective symptom improvements within 14 days postoperatively. Seventeen patients (15 males and 2 females with a mean age of 53.4±11.9 years) did not report any early symptom improvements. Clinical characteristics—hand dominance, sex, smoking history, type of surgery, age, symptom duration, elbow range of motion, grip strength, key pinch strength, 2 point discrimination, pain, quick disabilities of the arm, shoulder and hand (DASH) score, and modified McGowan grade—were analyzed retrospectively using a Mann-Whitney test or chi square test. Surgical outcomes were measured at postoperative 3 and 12 months using repeated-measures ANOVA, and Wilson and Krout criteria were analyzed using a chi-square test. RESULTS: There was a difference in key pinch strength (p<0.001) between the groups. At postoperative 12 months, Wilson and Krout criteria (p=0.029) were associated with early improvement of subjective symptoms. The subjects' quick DASH scores and grip strengths improved over time, but no difference was observed between the groups. CONCLUSION: After surgical treatments of moderate to severe cubital tunnel syndrome, patients who presented early improvement of subjective symptoms, compared with those who did not, had significantly higher preoperative key pinch strength and better surgical outcomes at postoperative 12 months.

Ulnar neuropathy

Cubital tunnel syndrome is the second most common compressive neuropathy. Its diagnosis is largely based on clinical findings. It has been well known that patients with mild to moderate grade of cubital tunnel syndrome have a high chance of spontaneous resolution, while those with severe degree do not. Thus, the former is treated with conservative methods initially, and the latter is indicated for surgical intervention. There are three types of surgical techniques for cubital tunnel syndrome. Of these, in-situ decompression technique has been gaining popularity as it is simpler and shows similar efficacy with less complications compared to other techniques. In this review, we deal with current concepts of the cubital tunnel syndrome pertaining to the primary clinical practice.

Síndrome compressiva de múltiplos nervos na dermatopolimiosite: relato de caso / Multiple Nerve Compression Syndrome in Dermatopolymyositis: Case Report

A dermatopolimiosite émiopatia inflamatória de etiologia provavelmente autoimune e comportamento heterogêneo, afetando principalmente pele e músculos e ocasionando manifestações exantemáticas características, como o eritema heliótropo e a pápula de Gottron, e fraqueza muscular proximal simétrica. A associação dessa patologia a neuropatias periféricas é pouco conhecida, podendo raramente ocorrer neuropatia múltipla. O objetivo deste artigo é relatar um caso de síndrome compressiva de múltiplos nervos em portador de dermatopolimiosite. O paciente apresentava fraqueza muscular proximal e exantema característico e foi submetido à revisão laboratorial, ressonância magnética de abdome e eletroneuromiografia, que mostraram alterações. Foi então tratado através da neurólise do nervo mediano ao nível do túnel do carpo e do nervo ulnar ao nível do túnel cubital. Trata-se de importante possibilidade terapêutica em casos como o descrito,mas estudos de maior porte sobre a descompressão simultânea dos túneis carpal e ulnar são necessários.

Dermatopolymyositis is an inflammatory myopathy ­ whose etiology is probably autoimmune ­ that has heterogeneous manifestations that occur mainly in skin and muscles and cause characteristic rash, such as heliotrope rash, Gottron's sign and symmetric proximal weakness. The association between this pathology and peripheral neuropathies is little known and multiple neuropathies rarely occur. The purpose of this article is to report a case of multiple nerve compression syndrome in a patient with dermatopolymyositis. The patient had proximal weakness and characteristic rash and underwent a laboratorial review, abdominal MRI and electromyography, which showed changes. So he was treated by neurolysis of median and ulnar nerves at carpal and cubital tunnels levels, respectively. It is an important therapeutic possibility in cases like this, but larger studies on simultaneous decompression of carpal and cubital tunnels are necessary.

Effect of Elbow Position on Short-segment Nerve Conduction Study in Cubital Tunnel Syndrome / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>The appropriate elbow position of short-segment nerve conduction study (SSNCS) to diagnose cubital tunnel syndrome (CubTS) is still controversial. The goal of this study was to determine the effect of different elbow positions at full extension and 70° flexion on SSNCS in CubTS.</p><p><b>METHODS</b>In this cross-sectional study, the clinical data of seventy elbows from 59 CubTS patients between September, 2011 and December, 2014 in the Peking University First Hospital were included as CubTS group. Moreover, thirty healthy volunteers were included as the healthy group. SSNCS were conducted in all subjects at elbow full extension and 70° elbow flexion. Paired nonparametric test, bivariate correlation, Bland-Altman, and Chi-squared test analysis were used to compare the effectiveness of elbow full extension and 70° flexion elbow positions on SSNCS in CubTS patients.</p><p><b>RESULTS</b>Data of upper limit was calculated from healthy group, and abnormal latency was judged accordingly. CubTS group's latency and compound muscle action potential (CMAP) of each segment at 70° elbow flexion by SSNCS was compared with full extension position, no statistically significant difference were found (all P > 0.05). Latency and CMAP of each segment at elbow full extension and 70° flexion were correlated (all P < 0.01), except the latency of segment of 4 cm to 6 cm above elbow (P = 0.43), and the latency (P = 0.15) and the CMAP (P = 0.06) of segment of 2 cm to 4 cm below elbow. Bivariate correlation and Bland-Altman analysis proved the correlation between elbow full extension and 70° flexion. Especially in segments across the elbow (2 cm above the elbow and 2 cm below it), latency at elbow full extension and 70° flexion were strong direct associated (r = 0.83, P < 0.01; r = 0.55, P < 0.01), and so did the CMAP (r = 0.49, P < 0.01; r = 0.72, P < 0.01). There was no statistically significant difference in abnormality of each segment at full extension as measured by SSNCS compared with that at 70° flexion (P > 0.05, respectively).</p><p><b>CONCLUSIONS</b>There was no statistically significant difference in the diagnosis of CubTS with the elbow at full extension compared with that at 70° flexion during SSNCS. We suggest that elbow positon at full extension can also be used during SSNCS.</p>

Ultrasound Diagnosis of Double Crush Syndrome of the Ulnar Nerve by the Anconeus Epitrochlearis and a Ganglion

Double compression of the ulnar nerve, including Guyon's canal syndrome associated with cubital tunnel syndrome caused by the anconeus epitrochlearis muscle, is a very rare condition. We present a case of double crush syndrome of the ulnar nerve at the wrist and elbow in a 55-year-old man, as well as a brief review of the literature. Although electrodiagnostic findings were consistent with an ulnar nerve lesion only at the elbow, ultrasonography revealed a ganglion compressing the ulnar nerve at the hypothenar area and the anconeus epitrochlearis muscle lying in the cubital tunnel. Careful physical examination and ultrasound assessment of the elbow and wrist confirmed the clinical diagnosis prior to surgery.

Factors Influencing Outcomes after Ulnar Nerve Stability-Based Surgery for Cubital Tunnel Syndrome: A Prospective Cohort Study

PURPOSE: Simple decompression of the ulnar nerve has outcomes similar to anterior transposition for cubital tunnel syndrome; however, there is no consensus on the proper technique for patients with an unstable ulnar nerve. We hypothesized that 1) simple decompression or anterior ulnar nerve transposition, depending on nerve stability, would be effective for cubital tunnel syndrome and that 2) there would be determining factors of the clinical outcome at two years. MATERIALS AND METHODS: Forty-one patients with cubital tunnel syndrome underwent simple decompression (n=30) or anterior transposition (n=11) according to an assessment of intra-operative ulnar nerve stability. Clinical outcome was assessed using grip and pinch strength, two-point discrimination, the mean of the disabilities of arm, shoulder, and hand (DASH) survey, and the modified Bishop Scale. RESULTS: Preoperatively, two patients were rated as mild, another 20 as moderate, and the remaining 19 as severe according to the Dellon Scale. At 2 years after operation, mean grip/pinch strength increased significantly from 19.4/3.2 kg to 31.1/4.1 kg, respectively. Two-point discrimination improved from 6.0 mm to 3.2 mm. The DASH score improved from 31.0 to 14.5. All but one patient scored good or excellent according to the modified Bishop Scale. Correlations were found between the DASH score at two years and age, pre-operative grip strength, and two-point discrimination. CONCLUSION: An ulnar nerve stability-based approach to surgery selection for cubital tunnel syndrome was effective based on 2-year follow-up data. Older age, worse preoperative grip strength, and worse two-point discrimination were associated with worse outcomes at 2 years.

Comparison of Cubital Tunnel Syndrome with or without Anconeus Epitrochlearis: Are They Different?

PURPOSE: To assess the clinical difference between cubital tunnel syndrome with anconeus epitrochlearis (AE) and idiopathic cubital tunnel syndrome without known other causes. METHODS: This cross-sectional study included the 326 patients who were subjected to surgery because of cubital tunnel syndrome from 2008 to 2014. After exclusion of patients with other known causes of cubital tunnel syndrome, a total of 107 patients were divided into two groups; patients with and without AE. The clinical differences between two groups were analyzed retrospectively; age, sex, presence of intrinsic muscle atrophy, interval from symptom development to surgery, pinch power, the disabilities of the arm, shoulder and hand score and the nerve conduction velocity (NCV). RESULTS: Thirty four (10.4%) patients, being subjected to surgery had the AE. Among 107 patients who had no other known causes, 26 patients had AE. 19 out of 26 patients with AE was male. Average age of patients with AE was significantly younger. The interval from symptom development to surgery in AE patients was significantly shorter. Motor NCV of ulnar nerve at above elbow joint in comparison with that at below elbow joint in AE patient was more significantly decreased (14.3 m/sec vs. 8.3 m/sec). CONCLUSION: The AE in cubital tunnel syndrome is no more rare structure. In younger male patients with rapidly progressive worsening cubital tunnel symptoms, and if there is significant decrease of ulnar motor nerve velocity at above elbow in comparison with at below elbow, the AE should be considered as cause of ulnar neuropathy.

Frecuencia de algunos signos de provocación para el nervio cubital en el codo en una población sana / Fréquence de quelques signes de provocation du nerf ulnaire au coude dans une population saine / Frequency of some signs of challenge to the ulnar nerve at the elbow in a healthy population

Introducción: el síndrome del túnel cubital en el codo es a menudo subdiagnosticado y confundido con la epicondilitis medial. Presenta, con frecuencia, variabilidad en las pruebas del codo contra gravedad; se determinó la proporción de signos positivos sobre el total de codos examinados. Objetivo: determinar en una población sana asintomática la frecuencia de los signos del síndrome del túnel cubital en el codo. Métodos: en 380 codos de una población voluntaria, se realizaron las pruebas de Tinel, de flexión del codo, de rotación interna y flexión del codo, el scratch-collapse y test de flexión del codo contra gravedad; se determinó la proporción de signos positivos sobre el total de codos examinados. Resultados: en total, 66 personas (34,7 por ciento) tuvieron al menos un test positivo en uno o ambos codos. El 45,4 por ciento de las mujeres y el 20,7 por ciento de los hombres tuvieron al menos un test positivo (p=0,001). La prueba de flexión del codo con estimulo de presión tuvo la mayor frecuencia (13,4 por ciento), luego la prueba de Tinel (8,9 por ciento). El test de flexión del codo contra gravedad (4,2 por ciento) y la prueba scratch-collapse (3,4 por ciento) obtuvieron bajas frecuencias. Conclusiones: el 34,7 por ciento de individuos tuvieron al menos un test positivo en uno o ambos codos, cifra alta que sugeriría una alta tasa de falsos positivos en pacientes con síndrome del túnel cubital. En las mujeres, que tenían el doble que los hombres de positividad, sugiere que algunos factores anatómicos, hormonales y otros desconocidos podrían influenciar en esto. El test de flexión del codo contra gravedad tiene en cuenta el flujo contra gravedad de la circulación arterial del nervio cubital, que sumado a la flexión del codo, reproduciría más rápido los síntomas en un paciente con síndrome del túnel cubital. En población sana se encontró una frecuencia baja (4,2 por ciento), lo cual se sugiere como un nuevo signo para apoyar el diagnóstico clínico. No obstante se requiere de otros estudios en pacientes con esta afección para determinar la sensibilidad y especificidad(AU)

Introduction: cubital tunnel syndrome in the elbow is often sub-diagnosed and confused with medial epicondylitis. Variability has often provocative tests. Objective: determine frequency of signs of cubital tunnel syndrome in the elbow in a healthy asymptomatic population. Methods: 380 elbows in a voluntary population were tested by Tinel tests, elbow flexion, internal rotation and elbow flexion, the scratch test-collapse and elbow flexion against gravity; the proportion of positive signs on total elbows examined was determined. Results: in total, 66 persons (34.7 percent) had at least one positive test on one or both elbows. 45.4 percent women and 20.7 men had at least one positivest (p = 0.001). The elbow flexion test with pressure stimulus had the highest rate (13.4 percent e test (p = 0.001). The elbow flexion test with pressure stimulus had the highest rate (13.4 percent), then Tinel test (8.9 percent). The test of elbow flexion against gravity (4.2 percent) and the scratch-collapse (3.4 percent) had low test frequencies. Conclusions: 34.7 percent of subjects had at least one positive test on one or both elbows. This high number would suggest high rate of false positives in patients with cubital tunnel syndrome. In women, they were positive twice as men, suggesting that some anatomical, hormonal and other unknown factors could influence. The test of elbow flexion against gravity takes into account the gravity flow against the arterial circulation of the ulnar nerve, which added to the elbow flexion reproduce faster symptoms in a patient with cubital tunnel syndrome. In the healthy population low frequency (4.2 percent) was found, which is suggested as a new sign to support the clinical diagnosis. However it requires further studies in patients with this condition to determine sensitivity and specificity(AU)

Introduction: le syndrome du tunnel cubital au coude est souvent mal diagnostiqué et confondu avec l'épicondylite médiale. D'habitude, les tests de provocation ont des résultats variables. Objectif: le but de ce travail est de déterminer la fréquence des signes du syndrome du tunnel cubital au coude dans une population saine asymptomatique. Méthodes: dans une population volontaire (380 coudes), on a effectué des tests cliniques tels que le test de Tinel, le test de flexion du coude, le test de rotation interne et flexion du coude, le test de scratch-collapse, et le test de flexion active du coude contre la gravité. On a déterminé la proportion de signes positifs sur le total de coudes examinés. Résultats: au total, soixante-six personnes (34.7 pourcent) ont eu au moins un test positif d'un ou de tous les deux bras. Il y a eu au moins un test positif (p=0.001) dans 45.4 pourcent des femmes et dans 20.7 pourcent des hommes. Le test de flexion du coude à stimulus de pression a été le plus fréquent (13.4 pourcent), suivi par le test de Tinel (8.9 pourcent). Le test de flexion du coude contre la gravité (4.2 pourcent) et le test de scratch-collapse (3.4 pourcent) n'ont pas été assez fréquents. Conclusions: dans 34.7 pourcent des cas, il y a eu au moins un test positif d'un ou de tous les deux coudes. Cette chiffre considérée haute suggère un haut taux de faux positifs chez les patients atteints de syndrome du tunnel cubital. Chez les femmes ayant une positivité deux fois plus haute que chez les hommes, elle suggère que des facteurs anatomiques, hormonaux et d'autres encore inconnus peuvent influer. Le test de flexion du coude contre la gravité tient en compte le flux contra la gravité de la circulation artérielle du nerf cubital qui, conjointement avec la flexion du coude, reproduit plus rapidement les symptômes du syndrome du tunnel cubital chez un patient. Dans une population saine, on a trouvé une basse fréquence (4.2 pourcent), ce qui indique un nouveau signe soutenant le diagnostic clinique. Toutefois, il faut faire de nouvelles études pour déterminer la sensibilité et la spécificité(AU)