Herniation of intervertebral disc into thoracolumbar fracture vertebral body leads to malunion of fracture and decrease of intervertebral space height / 中国骨伤

OBJECTIVE@#To analyze the clinical characteristics of intervertebral disc tissue injury and herniation into the vertebral body in thoracolumbar fracture on fracture healing, vertebral bone defect volume and intervertebral space height.@*METHODS@#From April 2016 to April 2020, a total of 140 patients with thoracolumbar single vertebral fracture combined with upper intervertebral disc injury treated with pedicle screw rod system reduction and internal fixation in our hospital. There were 83 males and 57 females, aged from 19 to 58 years old, with an average age of (39.33±10.26) years old. All patients were followed up regularly 6 months, 12 months and 18 months after surgery. The patients with injured intervertebral disc tissue not herniated into the fractured vertebral body were the control group, and the patients with injured intervertebral disc and herniated into the fractured vertebral body were the observation group. By detecting the thoracolumbar AP and lateral X-ray films, CT and MRI of the thoracolumbar segment at different follow-up time, calculate the changes of the wedge angle of the fractured vertebral body, the sagittal kyphosis angle and the height of the superior adjacent intervertebral space, the changes of the fracture healing and bone defect volume after the reduction of the vertebral body, and the changes of the intervertebral disc degeneration grade. The prognosis was evaluated by visual analogue scale(VAS) and Oswestry disability index(ODI). Finally, the differences of the above results among different groups were comprehensively analyzed.@*RESULTS@#All the patients had normal wound healing without complications. A total of 87 patients received complete follow-up data, at least 18 months after internal fixation. Thoracolumbar AP and lateral X-ray films showed that 18 months after the reduction and internal fixation operation, the vertebral wedge angle, sagittal kyphosis angle and the height of the upper adjacent intervertebral space in the observation group were greater than those in the control group(P<0.05). CT scanning showed that the deformity of the fracture healed 12 months after the vertebral body reduction in the observation group and formed a "cavity" of bone defect connected with the intervertebral space, and its volume was significantly increased compared with that before (P<0.05). MRI scanning showed that the degeneration rate of injured intervertebral discs in the observation group was more serious than that in the control group 12 months after operation(P<0.05). However, there was no significant difference in VAS and ODI score at each time.@*CONCLUSION@#Herniation of injured intervertebral disc tissue hernias into the fractured vertebral body leads to increased bone resorption defect volume around the fracture and forms a malunion "cavity" connected with the intervertebral space. This may be the main reason for the change of vertebral wedge angle, the increase of sagittal kyphosis angle and the decrease of intervertebral space height after removal of internal fixation devices.

Early efficacy of three dimensional printed anatomical biomimetic cervical artificial disc replacement in the treatment of cervical degenerative diseases / 中华外科杂志

Objective: To investigate the efficacy and safety of a new cervical artificial disc prosthesis in the treatment of cervical degenerative diseases. Methods: The clinical data of 18 patients with single-level cervical degenerative diseases who underwent three dimensional printed anatomical bionic cervical disc replacement at Department of Spinal Surgery,Honghui Hospital,Xi'an Jiaotong University from May 2019 to July 2020 were analyzed retrospectively. There were 7 males and 11 females,aged (45±8) years old(range:28 to 58 years).The surgical segment was located at C3－4 level in 2 cases, C4－5 level in 5 cases, C5－6 level in 9 cases, and C6－7 level in 2 cases.The clinical and radiographic outcomes were recorded and compared at preoperative,postoperative times of one month and twelve months.The clinical assessments contained Japanese orthopedic association (JOA) score,neck disability index (NDI) and visual analogue scale (VAS).Imaging assessments included range of motion (ROM) of cervical spine, prosthesis subsidence and prosthesis anteroposterior migration.Repeated measurement variance analysis was used for comparison between groups,and paired t test was used for pairwise comparison. Results: All patients underwent the operation successfully and were followed up for more than 12 months.Compared with preoperative score,the JOA score,NDI and VAS were significantly improved after surgery (all P<0.01).There was no significant difference in postoperative ROM compared with 1-and 12-month preoperative ROM (t=1.570,P=0.135;t=1.744,P=0.099). The prosthesis subsidence was (0.29±0.13) mm (range: 0.18 to 0.50 mm) at 12-month postoperatively.The migration of prosthesis at 12-months postoperatively were (0.71±0.20) mm (range: 0.44 to 1.08 mm).There was no prosthesis subsidence or migration>2 mm at 12-month postoperatively. Conclusion: Three dimensional printed anatomical biomimetic cervical artificial disc replacement has a good early clinical effect in the treatment of cervical degenerative diseases, good mobility can be obtained while maintaining stability.

The development of artificial cervical disc replacement from the perspective of orthopedic bionic therapy / 中华外科杂志

The modern surgical treatment of cervical degenerative disc disease can be traced back to the advent of anterior cervical decompression and fusion.With the emergence of fusion-related complications,different scholars have promoted the gradual transformation of cervical degenerative disc diseases from "fusion fixation" to "non-fusion reconstruction" through in-depth fusion with materials science,engineering mechanics and other disciplines.The innovation of this treatment concept is consistent with the original intention of "structural remodeling,functional reconstruction,maximum repair and reconstruction of the morphology and function of skeletal muscle system" in orthopedic bionic treatment,which is essentially in line with the "bionic alternative therapy" in orthopedic bionic therapy.This paper focuses on the surgical treatment of cervical degenerative disc diseases,reviews the development history of artificial cervical disc replacement,analyzes the evolution from orthopedic biomimetic therapy,and explores a new direction for the design of artificial cervical disc prostheses and the treatment of cervical degenerative disc diseases in the future.

Biomechanical affect of percutaneous transforaminal endoscopic discectomy on adjacent segments with different degrees of degeneration:a finite element analysis / 中国骨伤

OBJECTIVE@#To investigate the biomechanical affect of percutaneous transforaminal endoscopic discectomy(PTED) on adjacent segments with different degrees of degeneration and related risk of adjacent segment diseases (ASD) caused by this operation.@*METHODS@#A healthy male adult volunteer was selected, and the lumbosacral vertebra image data was obtained by CT scan, and the external contour of the bone structure was reconstructed. On this basis, the external contour of the bone structure was fitted by using the smooth curve in 3D-CAD software, and the complete three-dimensional finite element modelof the non degenerate L@*RESULTS@#In the finite element model without adjacent segmental disc degeneration, the annulus fibrosus von Mises stress and intradiscal pressure of the PTED model showed only a slight increase under most stress conditions, and a slight decrease in a few conditions, and there was no significant change trend before and after surgery. In the original degenerated adjacent segment disc model, the biomechanical indicators related to disc degeneration in the pre- and post-PTED model showed significant deterioration, leading to an increased risk of potential adjacent spondylopathy.@*CONCLUSION@#PTED surgery will not lead to the significant deterioration of postoperative biomechanical environment of non-degeneration adjacent intervertebral discs, and the original degeneration of adjacent intervertebral discs is a important risk factor for ASD.

Tratamiento de la hernia discal cervical. Hospital Provincial General Camilo Cienfuegos de Sancti Spíritus / Cervical disc herniation treatment at Camilo Cienfuegos General Provincial Hospital in Sancti Spíritus

RESUMEN Fundamento: La enfermedad degenerativa cervical produce una variedad de síntomas clínicos que pueden ser tratados de forma no quirúrgica, sin embargo en ocasiones la cirugía es necesaria. La técnica quirúrgica más empleada para tratar esta enfermedad es la discectomía con artrodesis. El tratamiento adecuado de la hernia discal cervical depende de una adecuada selección de la técnica quirúrgica y su correcta realización. Objetivo: Caracterizar el tratamiento quirúrgico de la hernia discal cervical en el Hospital Provincial General Camilo Cienfuegos de Sancti Spíritus en el período: enero de 2015 a diciembre de 2018. Metodología: Se realizó un estudio prospectivo en el Hospital Provincial General Camilo Cienfuegos de Sancti Spíritus de enero 2015 a diciembre 2018. La población de estudio: todos los pacientes que acudieron a la consulta externa de neurocirugía del hospital refiriendo cervicalgia o cervicobraquialgia; la muestra: 51 pacientes diagnosticados por resonancia magnética nuclear de hernia discal cervical y que se les realizó al menos una discectomía cervical. Resultados: De los pacientes el 62.8 % eran mujeres y el 33.3 % tenía una edad comprendida entre 51-60 años. El espacio intervertebral más afectado fue C5-C6 (43.7 %). La técnica quirúrgica que predominó fue la discectomía con colocación de injerto autólogo (79.7 %). La complicación más frecuente fue la expulsión del injerto (3.9 %). Conclusiones: El comportamiento de la hernia discal en cuanto al sexo, edad y nivel afectado fue similar al descrito en la bibliografía. La técnica quirúrgica más empleada fue la artrodesis con injerto autólogo de cresta ilíaca. Las complicaciones presentadas fueron infrecuentes.

ABSTRACT Background: Cervical degenerative disease produces a variety of clinical symptoms that can be treated by a non-surgical way, however sometimes surgery is necessary. The most widely used surgical technique to treat this disease is discectomy with arthrodesis. The proper treatment of cervical disc herniation depends on an adequate selection of the surgical technique and its correct performance. Objective: To characterize the surgical treatment of cervical disc herniation at Camilo Cienfuegos General Provincial Hospital in Sancti Spíritus in the period: January 2015 to December 2018. Methodology: A prospective study was carried out at Camilo Cienfuegos General Provincial Hospital in Sancti Spíritus from January 2015 to December 2018. The study population: all the patients who attended the hospital outpatient neurosurgery consultation referring cervicalgia or cervicobraquialgia; the sample: 51 patients diagnosed with cervical disc herniation and performed at least one cervical discectomy. Results: Of the patients, 62.8 % were women and 33.3 % were between 51-60 years old. The most affected intervertebral space was C5-C6 (43.7 %). The predominant surgical technique was discectomy with autologous graft placement (79.7 %). The most frequent complication was the expulsion of the graft (3.9 %). Conclusions: The behavior of the herniation disc concerning sex, age and affected level was similar to that described in the literature. The most widely used surgical technique was arthrodesis with an autologous iliac crest graft. The complications presented were infrequent.

Corpectomia lateral parcial para o tratamento de compressão ventral extradural crônica entre T9-T10 em um cão / Partial lateral corpectomy for treatment of chronic ventral extradural compression between T9-T10 in a dog

Objetivou-se relatar um caso de protrusão do disco intervertebral com localização atípica e descrever a técnica cirúrgica de corpectomia lateral parcial no tratamento da afecção em um cão. Um cão de sete anos de idade, macho, raça Pug, foi atendido com ataxia proprioceptiva dos membros pélvicos havia três meses, associada à doença do disco intervertebral entre a nona e 10ª vértebras torácicas. Após um mês de tratamento conservativo sem melhora, o paciente foi encaminhado para o tratamento cirúrgico, quando foi realizada corpectomia lateral parcial esquerda para descompressão da medula espinhal. Após a cirurgia, o paciente apresentou melhora considerável do quadro, sendo a técnica eficaz na remoção da compressão extradural, sem manipulação da medula espinhal ou outras complicações.(AU)

The aim of this study is to report a case of intervertebral disc protrusion with atypical location and describe the surgical technique of partial lateral corpectomy in the treatment of this disease in a dog. A dog, seven -years-old, male, Pug breed was attended with proprioceptive ataxia of the hind limbs for three months correlated with intervertebral disc disease between the 9th and 10th thoracic vertebrae. After a month of conservative treatment without improvements, the patient was referred for surgical treatment, which was performed as a partial left lateral corpectomy for decompression of the spinal cord. After surgery, the patient showed considerable improvement, this technique being shown to be effective in the removal of extradural compression, without manipulation of the spinal cord or other complications.(AU)

Extrusão de disco intervertebral caudal (coccígea) em um Basset Hound: primeiro relato de caso / First report of caudal intervertebral disk extrusion in a Basset Hound

Relata-se o primeiro caso no Brasil de doença do disco intervertebral (Hansen tipo I) entre as vértebras caudais (coccígeas) em uma cadela Basset Hound com seis anos de idade, castrada, pesando 16kg e com histórico de dor durante defecação e manipulação da região pélvica associada à inabilidade de mover, elevar ou abanar a cauda. Na radiografia simples, observou-se opacidade do forame intervertebral entre a quarta e a quinta vértebra caudal. O animal foi submetido à laminectomia dorsal modificada, seguida de fenestração do disco intervertebral afetado. Decorridos 15 dias da cirurgia, a paciente não demonstrava sinais de dor ao defecar e realizava movimentos de abano de cauda, mas ainda com desconforto na palpação e sem elevação da cauda acima da coluna vertebral, o que foi resolvido após 30 dias do procedimento cirúrgico. A relevância do caso está na inclusão, mesmo que rara, da doença do disco intervertebral caudal no diagnóstico diferencial em cães com dor durante a defecação e manipulação da cauda, sendo o exame radiográfico uma ferramenta auxiliar importante para o diagnóstico definitivo e o plano terapêutico.(AU)

We report here the first case in Brazil of an intervertebral disc disease (Hansen type I) between the caudal vertebrae (coccygeal) in a six-year-old Basset Hound dog, castrated, weighing 16 kg and history of pain during defecation and manipulation of the pelvic region, associated with the inability to move, raise and shake its tail. In the radiography survey, an opacity of the intervertebral foramen between the fourth and fifth caudal vertebra was observed. The animal underwent a modified dorsal laminectomy followed by fenestration of the affected intervertebral disc. After 15 days following surgery, the patient showed no signs of pain when defecating and was able to perform the tail wag movements, but with discomfort on palpation and could not rise the tail high up the spine, which was resolved after 30 days of surgery. The relevance of this report is the inclusion, even if rare, of the caudal intervertebral disc disease in the differential diagnosis in dogs with pain during defecation and handling of the tail, and the radiographic survey is an important auxiliary tool for definitive diagnosis and treatment plan for this disease.(AU)

Avaliação clínica de cães com doença do disco intervertebral (Hansen tipo I) submetidos à descompressão cirúrgica: 110 casos / Clinical evaluation of dogs with intervertebral disc disease (Hansen type I) submitted to surgical decompression: 110 cases

O objetivo deste estudo foi identificar cães com doença do disco intervertebral toracolombar (Hansen tipo I) submetidos ao tratamento cirúrgico em um serviço de rotina em neurologia de um hospital veterinário universitário no período de 2006 a 2014, e obter informações a respeito da idade, do sexo, da raça, local da extrusão, interpretação da mielografia, avaliação dos graus de disfunção neurológica, recuperação funcional desses cães e observar a ocorrência de recidiva dos sinais clínicos da doença. A raça mais frequente foi Dachshund (69%), seguida dos cães sem raça definida (14,5%). Os locais mais afetados foram entre T12-T13 (31,9%) e L1-L2 (19,1%). Dos 110 cães, 74 (67,3%) tiveram melhora dos sinais clínicos após o procedimento cirúrgico, sendo 54 (49,1%) considerados satisfatórios e 20 (18,2%), parcialmente satisfatórios. Destes cães, seis (8,1%) cães estavam em grau II, 19 (25,7%) em grau III, 35 (47,3%) em grau IV e 14 (18,9%) em grau V. Pode-se concluir que o tratamento cirúrgico promove recuperação funcional satisfatória na maioria dos cães com extrusão de disco toracolombar. O prognóstico para recuperação funcional após o tratamento cirúrgico é tanto melhor quanto menor for o grau de disfunção neurológica e o percentual de recidiva é baixo em animais submetidos a este tipo de terapia.(AU)

The aim of this study was to identify dogs with thoracolumbar intervertebral disc disease (Hansen type I) submitted for surgical treatment on a routine service in neurology in a university veterinary hospital in 2006-2014, and to get information about age, sex, breed, site of extrusion, interpretation of myelography, evaluation of the degree of neurological dysfunction, functional recovery of these dogs, and to verify the recurrence of clinical signs of disease. The most common breed was Dachshund (69%), followed by mixed breed (14.5%). The most affected sites were between T12-T13 (31.9%) and L1-L2 (19.1%). Of the 110 dogs, 74 (67.3%) improved clinical signs after surgery, 54 (49.1%) satisfactory and 20 (18.2%), in part satisfactory. From these dogs, six (8.1%) dogs were in grade II, 19 (25.7%) in grade III, 35 (47.3%) in grade IV, and 14 (18.9%) in grade V. It can be concluded that satisfactory surgical treatment promotes functional recovery in most dogs with thoracolumbar disk extrusion. The prognosis for functional recovery after surgical treatment is better the lower the degree of neurological dysfunction and the recurrence percentage is lower in dogs subjected to this type of therapy.(AU)

Tratamiento de síndrome de espalda fallida con nucleolisis percutánea más bloqueo peridural y foraminal con ozonoterapia / Treatment of failed back syndrome with percutaneous nucleolisis and Epidural, foraminal Block with oxygen-ozone

Se realiza estudio prospectivo para demostrar que la nucleolisis percutánea, más el bloqueo peridural y foraminal con ozonoterapia es efectiva y muy segura para disminuir el dolor producido por síndrome de espalda fallida. Material y método: previo consentimiento informado, a 45 pacientes con síndrome de espalda fallida, se les realizó un total de 45 nucleolisis percutáneas, más bloqueo peridural y foraminal con ozonoterapia, durante un periodo comprendido entre mayo 2012 a mayo del 2013. Todas las nucleolisis se realizaron bajo control fluoroscopio con medidas de asepsia y antisepsia estrictas, y sedación consciente. A todos los pacientes, se les administró ozono en disco, peridural y foraminal (5-10 ml) a 10ug/ml, más procaina al 2% y 1cc de 40mg de cristales esteroideos; en todos los casos se administró 1gr. de cefacidal como profilaxis. Discusión: La eficacia del tratamiento, se basa en el control del dolor según la escala visual analógica basal (EVA 0), a los 30 días (EVA 1), a los seis meses (EVA 3) y a los 12 meses (EVA 6). Se aplicó el test de oswestry, antes del tratamiento y al final del estudio; a todos los pacientes se les realizo encuesta en la primera consulta, y luego al final del tratamiento con una respuesta satisfactoria(AU)

This prospective study is to demonstrate that percutaneous nucleolisys and epidural, foraminal block with oxygen-ozone is effective and very safe to decrease the pain from failed back syndrome. Materials and Methods: previous reported 45 patients with failed back syndrome consent to a total of 45 percutaneous nucleolisys more and foraminal Epidural blockade with ozone therapy was conducted over a period from May 2012 to May 2013 all nucleolisys were performed under fluoroscopic control measures strict asepsis and antisepsis, conscious sedation. All patients were administered ozone in disk, epidural and foraminal (5-10 ml) at 10 ug / ml over 2% procaine more steroidal 1cc 40mg of crystals, in all cases of cefaolin sodium 1grs administered prophylactically. Discution: The effectiveness of treatment is based on pain control by baseline visual analog scale (EVA 0), 30 days (EVA 1), six (EVA 3) and 12 months (EVA 6). By oswestry test evaluated before treatment and at study end; all patients were conducted survey in the first query and then at the end of treatment with satisfactory response

Cervical Arthroplasty for Moderate to Severe Disc Degeneration: Clinical and Radiological Assessments after a Minimum Follow-Up of 18 Months: Pfirrmann Grade and Cervical Arthroplasty

PURPOSE: Clinical outcomes and radiologic results after cervical arthroplasty have been reported in many articles, yet relatively few studies after cervical arthroplasty have been conducted in severe degenerative cervical disc disease. MATERIALS AND METHODS: Sixty patients who underwent cervical arthroplasty (Mobi-C(R)) between April 2006 and November 2011 with a minimum follow-up of 18 months were enrolled in this study. Patients were divided into two groups according to Pfirrmann classification on preoperative cervical MR images: group A (Pfirrmann disc grade III, n=38) and group B (Pfirrmann disc grades IV or V, n=22). Visual analogue scale (VAS) scores of neck and arm pain, modified Oswestry Disability Index (mODI) score, and radiological results including cervical range of motion (ROM) were assessed before and after surgery. RESULTS: VAS and mean mODI scores decreased after surgery from 5.1 and 57.6 to 2.7 and 31.5 in group A and from 6.1 and 59.9 to 3.7 and 38.4 in group B, respectively. In both groups, VAS and mODI scores significantly improved postoperatively (p<0.001), although no significant intergroup differences were found. Also, cervical dynamic ROM was preserved or gradually improved up to 18 months after cervical arthroplasty in both groups. Global, segmental and adjacent ROM was similar for both groups during follow-up. No cases of device subsidence or extrusion were recorded. CONCLUSION: Clinical and radiological results following cervical arthroplasty in patients with severe degenerative cervical disc disease were no different from those in patients with mild degenerative cervical disc disease after 18 months of follow-up.

prospective randomized trial comparing the spinal and general anesthesia in lumbar disc surgery: a study of 44 cases

General anesthesia is most frequently used for lumbar disc surgery despite the evidence that spinal anesthesia is as safe and may offer some additional advantages. The purpose of this study was to compare the intraoperative parameters and postoperative outcome after spinal and general anesthesia in demographically well matched patients undergoing elective lumbar Decompressive surgery. Prospective randomized controlled study. This study was carried out DHQ Hospital Mirpur AJK from January 2007 and May 2010. In this randomized controlled study we analyzed the outcome obtained in 44 patients in whom either spinal or general anesthesia was induced for lumber disc surgery. The variables recorded were anesthesia related class, surgical diagnosis, disc levels operated and pre, peri and postoperative measurements of variables like BP, and heart rate. All aspects of surgery, recovery, post anesthesia care and pain management were same irrespective of anesthetic type The narcotic and antiemetic requirement and length of stay in the hospital and incidence of urinary retention were also recorded in the post operative course. Demographically both groups were well matched. Anesthesia time was longer in patients receiving GA with increased heart rate and MABP perioperatively. There was more nausea and greater requirements for antiemetic and analgesics in patients receiving. GA [p value<0.05]. Perioperative heart rate and MABP was on normal side and there was no urinary retention in patients who received spinal anesthesia. Spinal anesthesia was a safe and effective as GA for patients undergoing lumbar Decompressive surgery. Spinal anesthesia had added advantages of short anesthesia duration, decreased antiemetic and analgesic requirements. GA general anesthesia, HR heart rate, I/V intravenous, MAP mean arterial pressure, PACU post anesthesia care unit, RCT randomized controlled trial, SA spinal anesthesia

Doença do disco intervertebral cervical em cães: 28 casos (2003-2008) / Cervical intervertebral disk disease in dogs: 28 cases (2003-2008)

O objetivo deste estudo foi identificar cães com doença do disco intervertebral (DDIV) cervical atendidos no Hospital Veterinário Universitário (HVU) da Universidade Federal de Santa Maria (UFSM) entre janeiro de 2003 e outubro de 2008 e obter informações a respeito de raça, sexo, idade, sinais neurológicos, resposta ao tratamento cirúrgico, complicações, tempo de recuperação funcional após a cirurgia e ocorrência de recidiva. Hiperestesia cervical foi observada em todos os cães (n=28). Quanto ao grau de disfunção neurológica foram verificados: grau I (8/28[28,5 por cento]), grau II (3/28 [10,7 por cento]), grau III (5/28[17,8 por cento]) e grau V (12/2 [42,8 por cento]). A duração dos sinais neurológicos antes da cirurgia em sete cães (25 por cento) permaneceu por até 15 dias, em 14 cães (50 por cento) entre 15 e 30 dias e nos outros sete cães (25 por cento) por mais de 30 dias. A recuperação satisfatória e sem recidiva foi observada em todos os cães submetidos ao tratamento cirúrgico e que sobreviveram (n=21). Pode-se concluir que a DDIV cervical em nossa rotina acomete principalmente cães adultos, machos, de raças condrodistróficas e não condrodistróficas, incluindo as de grande porte; a hiperestesia cervical é a principal manifestação clínica; a técnica de fenda ventral promove recuperação funcional satisfatória e sem recidiva; as principais complicações trans-operatórias são a hemorragia do plexo venoso, a bradicardia e a hipotensão; e a duração dos sinais clínicos não interfere no tempo de recuperação pós-operatória dos cães.

The aim of this study was to evaluate the medical records of dogs with cervical intervertebral disk disease (IDD), submitted to surgical treatment at the Hospital Veterinário Universitário of Universidade Federal de Santa Maria (HVU-UFSM), between January 2003 and October 2008. The animal data included breed, sex, age, neurological signs and their durations, response to surgical treatment, complications, time for functional recovery after surgery, and recurrence. All dogs showed cervical hyperaesthesia confirmed by the neck movement test. Regarding the degree of neurological dysfunction, the following were verified: degree I (eight dogs, 28.5 percent), degree II (three dogs, 10.7 percent), degree III (five dogs, 17.8 percent), and degree V (twelve dogs, 42.8 percent). In relation to the duration of neurological signs prior to surgery, seven dogs (25 percent) showed neurological deficits for up to 15 days, fourteen dogs (50 percent) for 15 to 30 days and the other seven dogs (25 percent) showed signs of neurological deficiencies for more than 30 days. All dogs (n=21) showed satisfactory recovery and no recurrence. It can be concluded that most affected dogs are middle aged, males and condrodystrophic and noncondrodystrophic breeds including large-breed dogs and the main neurological sign is cervical hyperaesthesia. The surgical treatment promotes satisfactory functional recovery and no recurrence, the main complications intraoperative are venous plexus hemorrhage, bradycardia and hypotension and the duration of clinical signs prior to surgery do not interfere with the recovery time of the dogs.

Lumbar Discitis; prevalence and management after lumbar disc surgery

To study the occurrence of discitis after lumber disc surgery and its management. Observational study. Department of Neurosurgery QAMC/ BVH Bahawalpur. April 2006 to May 2009. This study includes 400 patients who underwent standard laminectomy procedure for disc excision. Patients presenting with backache and leg pain were thoroughly investigated. For the confirmation of herniated disc MRI or lumber route myelography were performed. All patients underwent either fenestration, hemilaminectomy or complete laminectomy for disc excision. Patients were followed for two weeks to three years after surgery. The diagnosis of discitis was on clinical grounds but this condition was confirmed by heamatological examination i.e. ESR, complete blood count, C-reactive protein and radiological examination i.e. MRI, CT and plain X-rays. Eighteen [4.5%] patients out of four hundred patients developed dicitis after surgery. Initially all patients were managed conservatively i-e. with complete bed rest and antibiotics .Fifteen [83.33%] patients responded well to this treatment but three [16.67%] patients did not improve and were subjected to surgery. Discitis after lumber disc surgery is rare. Discitis should be considered in any patient who develops severe backacheleg pain and muscles spasms after one to four weeks of lumber disc surgery especially accompanied with fever, raised ESR and elevated C-reactive proteins. A definitive diagnosis is essential for appropriate therapy of discitis

Vigilancia neurofisiológica transoperatoria multimodal en cirugía de columna / Neurophysiological monitoring in spinal cord surgery

Introducción: La vigilancia neurofisiológica durante la cirugía de columna vertebral y de la médula espinal consiste en pruebas de potenciales evocados somatosensoriales, potenciales motores musculares, potenciales dermatomales y electromiografía. El riesgo de daño neurológico permanente después de una cirugía medular sin monitorización es significativo y el costo alto. El objetivo de la vigilancia neurofisiológica es identificar, prevenir y corregir de forma inmediata el daño neurológico que puede pasar inadvertido durante la cirugía de columna vertebral y médula espinal. Material y métodos: Estudio transversal, observacional y descriptivo de los pacientes sometidos a cirugía de columna entre 2007 y 2008 con vigilancia neurofisiológica transoperatoria. Resultados: La muestra estuvo integrada por 351 pacientes, 135 del sexo masculino (38.46 %) y 216 del femenino (61.54 %); 82 % correspondió a patología osteodiscal con o sin afectación medular, 12 % a etiología traumática, 4 % a corrección de escoliosis y 2 % a tumores medulares; por localización, 62.1 % a patología lumbar, 33 % a cervical, 4.3 % a nivel dorsal y 0.5 % a nivel sacro. El 12.4 % de los pacientes presentó mejoría de la respuesta basal de sus potenciales evocados somatosensoriales; 56.8 % los mantuvo similares a sus controles prequirúrgicos, 28.4 % requirió llamada de alerta al cirujano por riesgo de daño y 2.4 % caída severa de respuesta. En ningún caso hubo pérdida permanente. Conclusiones: La vigilancia neurofisiológica constituye una herramienta de gran valor que evita daños que pueden producirse durante esta cirugía.

BACKGROUND: Intraoperative neurophysiological monitoring (IOM) during spine surgery consists of several functional tests including somatosensory evoked potentials (SSEPs), motor evoked potentials (MEPs), dermatomal potentials (DPs) and EMG (electromyography). Permanent neurological damage after spine surgery performed without intraoperative neurophysiological monitoring is frequent and often very costly. The main goal of IOM is the immediate detection, prevention and correction of neurological damage during surgery, which may go unnoticed without using these tests. METHODS: A total of 351 clinical files of patients with spinal surgery and continuous neurophysiological monitoring were transversally and descriptively reviewed from 2007 to 2008. RESULTS: There were 135 male patients (38.46%) and 216 female patients (61.54%); 82% of the cases were osteodiscal pathology with or without medullar involvement, 12% were patients with traumatic injuries, 4% with scoliosis and 2% had medullary tumors. Regarding localization, 62.1% were lumbar, 33% cervical, 4.3% thoracic and 0.5% sacral involvement; 12.4% of our cases showed significant improvement of the basal responses on SSEPs, and 56.8% showed no significant change during the procedure. In 28.4% of the cases, the surgical team had to be advised of potential neurological damage and in 2.4% there was absence of neurophysiological responses. No patient showed complete loss of any neurophysiological response. All patients reported clinical improvement after hospital discharge. CONCLUSIONS: Intraoperative neurophysiological monitoring may help avoid certain neurological risks during spine surgery, which may go unnoticed without the use of this technique.

Recuperação funcional de cães com doença do disco intervertebral toracolombar submetidos ao tratamento cirúrgico / Functional recovery of dogs with thoracolumbar intervertebral disk disease submitted the surgical treatment

O objetivo deste estudo foi avaliar a recuperação funcional de 33 cães com doença do disco intervertebral (DDIV) toracolombar submetidos ao tratamento cirúrgico, atendidos no Hospital Veterinário Universitário da Universidade Federal de Santa Maria (HVU-UFSM), no período entre 2004 e 2006. Os dados dos animais incluíram raça, idade, sexo, estado neurológico antes da cirurgia, interpretação da radiografia simples e contrastada, duração das deficiências neurológicas até o procedimento cirúrgico, tempo de recuperação pós-cirúrgico, função urinária e fecal e recidiva dos sinais clínicos. Quanto à duração dos sinais neurológicos antes da cirurgia, 27 (81,8 por cento) permaneceram por um período inferior a 15 dias, 20 cães tiveram melhora dos sinais clínicos decorridos 30 dias do procedimento cirúrgico e seis, com mais de 30 dias, sendo que um desses demorou 60 dias para caminhar. Apenas um (3,8 por cento) dos 26 cães que tiveram recuperação funcional satisfatória apresentou incontinência urinária e apenas um (3 por cento) teve recidiva da DDIV. Pode-se concluir que o tratamento cirúrgico promove recuperação funcional satisfatória na maioria dos cães com DDIV toracolombar. O prognóstico para recuperação funcional após o tratamento cirúrgico é tanto melhor quanto menor for o grau de disfunção neurológica e o percentual de recidiva é baixo em animais submetidos a este tipo de terapia.

This report aimed at evaluating the functional recovery of 33 dogs with thoracolumbar intervertebral disk disease (IVDD) admitted at the Veterinary Hospital of Santa Maria Federal University (HVU-UFSM), from 2004 to 2006. The animals underwent surgical treatment. Data obtained from the dogs included: breed, age, sex, neurological status before the surgery, interpretation of the simple x-ray and myelography, duration of clinical signs, days to walking after surgery, urinary and fecal function and disease recurrence. Neurological signs before the surgery kept for a period smaller than 15 days in 27 (81.8 percent) dogs. Twenty dogs presented involution of the neurological signs at 30 days after the surgical procedure, six after 30 days, and one dog elapsed 60 days to return walking. One of the twenty-six dogs that had satisfactory functional recovery had urinary incontinence and two of them presented recurrence of IVDD. This study showed that the surgical treatment promotes satisfactory functional recovery in most of the dogs with thoracolumbar IVD; the prognostic for functional recovery after the surgical treatment is better as smaller the degree of neurological dysfunction and the recurrence percentage is lower when submitted to this therapy type.

Evaluación clínica y radiológica de la prótesis de núcleo discal Nubac: informe preliminar / Clinical and radiological follow-up of Nubac disc prosthesis: preliminary report

BACKGROUND: Lumbar arthroplasty is an alternative to fusion for the treatment of degenerative disc disease. Replacement of the nucleus pulposus preserves the biomechanical properties in the annulus and plates, conserving lumbar motion. Our objective was to evaluate the feasibility and clinical and radiological findings at 3 months follow-up with the Nubac device. METHODS: Ten patients from the National Institute for Rehabilitation (INR, Mexico City) with degenerative disc disease were selected to participate in the study. They underwent discectomy with Nubac device with a follow-up period of 3 months. Evolution was evaluated with the VAS and Oswestry scales. RESULTS: Five men and five women were included in the study (average age 41.6 years). Surgical approach was anterolateral (4 patients), posterior (3 patients) and anterior (3 patients), VAS improved from 8.1 to 2.5 (p <0.05) and Oswestry Disability Index (ODI) improved from 58.2% to 24.2% (p <0.05). Disc height before surgery was 9.4 mm, and 3 months postoperatively was 12.5 mm with no complications, migration, or subsidence. CONCLUSIONS: Nubac prosthesis improved lumbar discogenic pain in a short time when evaluated using ODI and VAS scales. Disc height improved after a 3-month follow-up, but lumbar motion did not improve. No complications have been reported; however, a minimum follow-up of 4 years is needed to make a definite conclusion.

Discopatías lumbares: patología, diagnósticos y tratamiento quirúrgico / Lumbar disc: pathology, diagnostic and surgical treatment

La patología raquídea lumbar degenerativa de la que es una parte la Hernia Discal, es una causa más frecuente de Síndrome Lumbociático. De los pacientes con esta entidad clínica alrededor del 90 por ciento mejora con tratamiento médico consistente en reposo, analgésico antiinflamatorios, fisioterapias, etc, indicado por diferentes especialistas. Sólo alrededor de un 10 por ciento de los pacientes tiene indicación quirúrgica, decisión que debe ser la resultante de una correcta evaluación clínica y de una adecuada correlación clínico radiológica. Por tratarse de una patología frecuente especialmente en nuestra época de gran experiencia física de tipo laboral y deportiva, con mayor incidencia en edades productivas de los pacientes, con un costo social alto y necesidad de una reincorporación precoz a sus actividades, es importante definir el rol del tratamiento quirúrgico, la oportunidad de su indicación, la técnica adecuada, su costo y resultados.

The Disc Hernia witch forms part of the Lumbar Spinal Degenerative Disease is the most frequent cause of the Lumbociatic Syndrome. Ninety percent of the patients with this syndrome get better with medical treatment consisting of rest, analgesics, anti inflammatory drugs, Physiotherapy , Kinesiotherapy, etc, indicated by different specialists. Only around 10 percent of the patients require surgery, decision that should be the result of a correct clinical evaluation and an adequate clinical radiological correlation. As it is a frequent syndrome specially in these days of great physical demand in work and sports, with a high rate of incidence in the productive age of the patients, a high social cost and the need of a pront returne to the work field, it is important to define the role of the surgical treatment, the adequate timing and technique and its cost and results.

Comparison of unilateral posterior lumbar interbody fusion and bilateral posterior interbody fusion with simple discectomy at degenerative disc herniations

To evaluate the early results of unilateral posterior lumbar interbody fusion technique in lumbar discectomy cases compared with simple discectomy and bilateral posterior interbody fusion cases using visual analog scale [VAS] and Oswestry outcomes instruments and radiological and physical examinations. The control group had 40 patients who underwent simple discectomy. In group one, 8 patients had recurrent disc herniations and facet joint hypertrophy, 21 patients had degenerative disc disease and facet joint hypertrophy. In this group polyetheretherketone [PEEK] cage was used for protecting the disc height and recurrence. In group 2, 15 patients had degenerative lumbar disc herniations and bilateral facet joint hypertrophy. All patients were operated upon between October 2002 between February 2004 at the Neurosurgery Department of Kocatepe University Medical School, and were followed by the help of radiological exams, VAS and Oswestry scores, and clinical exams. The groups were compared to each other statistically. In the control group [n=40] there were recurrences and disc height loss. In group one [n=29] there were no recurrences and the height lost was limited. In group 2, [n=15] there was no recurrence, however, the lost disc height was more than group one. If the patient has degenerative disc disease, the use of unilateral posterior PEEK cage and interbody grafting is a safer mode of treatment after discectomy