• Asian Spine Journal
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• 제12권6호
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• pp.1017-1027
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• 2018

Study Design: This retrospective study was conducted including 18 patients who underwent posterior-only stabilization and fusion procedure for pseudoarthrosis in the ankylosed spine from October 2007 to May 2015. Purpose: This study aimed to describe the treatment outcomes in 18 patients with Andersson lesion (AL) who were managed using the posterior-only approach. Literature Review: AL is an unstable, localized, vertebral, or discovertebral lesion of the spine. It is observed in patients with ankylosing spondylitis. The exact etiology of this disorder remains unclear, and the treatment guidelines are not clearly described. Methods: We analyzed 18 patients with AL who were treated with posterior long segment spinal fusion without any anterior interbody grafting or posterior osteotomy. Pre- and postoperative radiography, computed tomography, and recent follow-up images were examined. The pre- and postoperative Visual Analog Scale score and the Oswestry Disability Index score were evaluated for all patients. Whiteclouds' outcome analysis criteria were applied at the follow-up. Moreover, at study completion, patient feedback was collected; all the patients were asked to provide their opinion regarding the surgery and were asked whether they would recommend this procedure to other patients and them self undergo the same procedure again if required. Results: The most common site was the thoracolumbar junction. The symptom duration ranged from 1 month to 10 years preoperatively. Most patients experienced fusion by the end of 1 year, and the fusion mass could be observed as early as 4 months. Pseudoarthrosis void of up to 2.5 cm was noted to be healed in subsequent imaging. In addition, clinically, the patients reported good symptomatic relief. No patient required revision surgery. Whiteclouds' outcome analysis score at the latest follow-up revealed goodto-excellent outcomes in all patients. Conclusions: ALs can be treated using the posterior-only approach with long segment fixation and posterior spinal fusion. This is a safe, simple, and quick procedure that prevents the morbidity of anterior surgery.

• 대한족부족관절학회지
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• 제11권1호
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• pp.79-85
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• 2007

Purpose: To evaluate the clinical efficacy of the limited posterior approach for the surgical treatment of intraarticular fracture of calcaneus. Materials and Methods: From March 2000 to February 2006, we studied retrospectively 186 patients, 203 cases who were treated with open reduction and internal fixation through limited posterior approach and were followed up for more than 1 year. The clinical results were evaluated with Creighton-Nebraska score and circle draw test after 1 year. We checked simple AP, lateral, axial and Broden's view preoperatively and 1 year after surgery, and compared $B{\ddot{o}}hler$ angle and Gissane angle. Results: By Creighton-Nebraska score, Sanders type 2 was 86.4, type 3 was 74.3, type 4 was 62.4. And by circle draw test, type 2 was 8.9 cm, type 3 was 7.2 cm, type 4 was 5.9 cm. $B{\ddot{o}}hler$ angle and Gissane angle were $7.6^{\circ}$, $102.4^{\circ}$, and it increased to $23.5^{\circ}$, $128.6^{\circ}$ after postoperative 1 year. Conclusion: Limited posterior approach for the surgical treatment of intraarticular fracture of calcaneus was considered to an effective treatment modality.

• Journal of Korean Neurosurgical Society
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• 제55권6호
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• pp.383-386
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• 2014

Objective : Symptomatic thoracic disc herniation often requires prompt surgical treatment to prevent neurological deterioration and permanent deficits. Anterior approaches offer direct visualization and access to the herniated disc and anterior dura but require access surgeons and are often associated with considerable postoperative pain and pulmonary complications. A disadvantage with using posterior approaches in the setting of central calcified thoracic disc herniation however, has been the limited visualization of anterior dura and difficulty to accurately assess the extent of decompression. Methods : We report our experience with intraoperative ultrasound (US) guidance during a modified posterior transpedicular approach for removal of a central calcified thoracic disc herniation with a review of pertinent literature. Results : The herniated thoracic disc was successfully removed with posterior approach with the aid of intraoperative US. The patient had significant neurological improvement at three months follow-up. Conclusion : Intraoperative ultrasound is a simple yet valuable tool for real-time imaging during transpedicular thoracic discectomy. Visualization provided by intraoperative US increases the safety profile of posterior approaches and may make thoracotomy unnecessary in a selected group of patients, especially when a patient has existing pulmonary disease or is otherwise not medically fit for the transthoracic approach.

• Journal of Trauma and Injury
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• 제30권4호
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• pp.212-215
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• 2017

The choice of the most appropriate treatment for thoracolumbar or lumbar spine burst fracture remains controversial from conservative treatment to fusion through a posterior or anterior approach. There are many cases where ligamentotaxis is used to reduce the burst fracture. However, indirect reduction using ligamentotaxis is often limited in the magnitude of the reduction that it can achieve. In our patient with severe burst fracture, we were able to restore an almost normal level of vertebral height and secure spinal canal widening by using only ligamentotaxis by posterior instrumentation. Before the operation, the patient had more than 95% encroachment of the spinal canal. This was reduced to less than 10% after treatment.

• Journal of Korean Neurosurgical Society
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• 제29권1호
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• pp.118-125
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• 2000

Objective : Trigeminal neurinomas are rare tumors that may locate in the middle fossa or posterior fossa and straddled both the middle and posterior fossa, according to their origin in the nerve complex. The aim of this study was to analyze the clinical presentation, operative approaches employed and outcome in 15 patients who were treated surgically, with special emphasis on surgical approach. Method : Between 1994 and 1998, a total of fifteen patients were histopathologically identified as neurinomas originating from the trigeminal nerve complex at the tumor clinic in the neuroscience center of the our university. Results : The surgical approach to these tumors depends on their anatomical location and tumor size. Six patients had tumors confined to the middle fossa, five patients had tumors limited to the posterior fossa, and four patients both in middle and posterior fossa components of their tumors. Nine neurinomas were removed via the conventional approach(pterional, subtemporal, suboccipital) and six were excised using skull base approach(transzygomatic subtemporal, orbitozygomatic, transpetrosal). Total resection of the tumor was possible in 10 cases. Total resection of tumor was accomplished in 83% of patients following skull base approach compared with 56% of patients following conventional approach. The surgical outcome was excellent or good in 13 cases, fair in one and, poor in one. There was no operative death. In the immediate postoperative period, aggravation of preoperative facial hypesthesia and 6th cranial nerve palsy were common. Although, these deficits were generally transient, eight patients remained with some degree of trigeminal hypesthesia, two had facial weakness, one neurotrophic keratitis, one diplopia, and one mastication difficulty. Conclusion : Surgical approach to the trigeminal neurinoma depends on the tumor location and tumor size. Skull base approach provides more complete tumor excision without increased morbidity compared to conventional approach. Surgeons have to be meticulous in order to reduce postoperative complication.

• Smart Structures and Systems
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• 제21권5호
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• pp.601-609
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• 2018

The estimated probabilistic model of wind data based on the conventional approach may have high discrepancy compared with the true distribution because of the uncertainty caused by the instrument error and limited monitoring data. A sequential quadratic programming (SQP) algorithm-based finite mixture modeling method has been developed in the companion paper and is conducted to formulate the joint probability density function (PDF) of wind speed and direction using the wind monitoring data of the investigated bridge. The established bivariate model of wind speed and direction only represents the features of available wind monitoring data. To characterize the stochastic properties of the wind parameters with the subsequent wind monitoring data, in this study, Bayesian inference approach considering the uncertainty is proposed to update the wind parameters in the bivariate probabilistic model. The slice sampling algorithm of Markov chain Monte Carlo (MCMC) method is applied to establish the multi-dimensional and complex posterior distribution which is analytically intractable. The numerical simulation examples for univariate and bivariate models are carried out to verify the effectiveness of the proposed method. In addition, the proposed Bayesian inference approach is used to update and optimize the parameters in the bivariate model using the wind monitoring data from the investigated bridge. The results indicate that the proposed Bayesian inference approach is feasible and can be employed to predict the bivariate distribution of wind speed and direction with limited monitoring data.

• Journal of Korean Neurosurgical Society
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• 제47권5호
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• pp.392-394
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• 2010

Trochlear nerve palsy associated with spontaneous subarachnoid hemorrhage (SAH) is known to be a rare malady. We report here on a patient who suffered with left trochlear nerve palsy following rupture of a right posterior communicating artery aneurysm. A 56-year-woman visited our emergency department with stuporous mental change. Her Hunt-and-Hess grade was 3 and the Fisher grade was 4. Cerebral angiography revealed a ruptured aneurysm of the right posterior communicating artery. The aneurysm was clipped via a right pterional approach on the day of admission. The patient complained of diplopia when she gazed to the left side, and the ophthalmologist found limited left inferolateral side gazing due to left superior oblique muscle palsy on day 3. Elevated intracranial pressure, intraventricular hemorrhage or a dense clot in the basal cisterns might have caused this trochlear nerve palsy.

• 대한족부족관절학회지
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• 제13권1호
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• pp.106-108
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• 2009

Calcaneus fracture with a subtalar dislocation are extremely rare. A case of a joint depression type calcaneus fracture with a lateral dislocation of the calcaneal posterior facet and tuberosity is presented. We treated it with open reduction and internal fixation with Steinmann pins and K-wires through limited posterior approach and obtained satisfactory radiographic and clinical outcome.

• 대한족부족관절학회지
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• 제27권1호
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• pp.1-6
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• 2023

Displaced intra-articular calcaneal fractures are difficult to treat because of complex anatomy and high soft tissue complications. Various surgical approaches have been introduced to solve these problems, but the treatment remains complex. Recently, clinically and radiographically superior results were reported using a subtalar arthroscopy in reducing the posterior facet in both percutaneous and open approaches. In the percutaneous approach, the arthroscopically assistant percutaneous approach must be selected carefully for mild-to-moderately displaced fractures because of the limited view. In the open approach, there is little evidence of the utility of subtalar arthroscopy. Therefore, intraoperative arthroscopy should always be used in conjunction with fluoroscopy to achieve reduction and assess the internal fixation placement.

• Clinics in Shoulder and Elbow
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• 제13권2호
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• pp.293-298
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• 2010

목적: 주관절은 굴곡 구축 40도 이상 굴곡 제한 105도 이하일 경우 일상 생활에 상당한 장애를 일으킬 수 있는 관절로 그 치료의 정도 및 시기를 결정하기가 상당히 어려운 것으로 알려져 있다. 이에 이 종설에서는 현재까지 인정된 주관절 구축의 수술적 접근법에 대하여 고찰하여 보도록 하겠다. 대상 및 방법: 환자의 병력을 포함하여 충분한 임상적 조사를 하는 것이 중요하다. 그리고 방사선학적 방법을 이용하여 환자의 주관절 구축에 대한 원인 및 상태를 정확히 파악하고 그에 적합한 수술법을 선택한다. 수술법으로는 관절경적 유리술 (arthroscopic release) 및 관혈적 유리술 (Open release), 견인 관절 성형술 (Distraction Arthroplasty), 인공관절 치환술 (Total elbow replacement)이 있으며 관혈적 유리술은 4가지 기본 도달법 -전방 도달법 (anterior approach), 내측 도달법 (medial "over the top" approach), 제한된 외측 도달법 (limited lateral approach: column procedure) 광범위 후방 도달법 (posterior extensile approach)-으로 분류될 수 있다. 결과 및 결론: 현재 주관절 구축의 수술은 관절경의 발달로 인한 최소 침습적인 방법이 대두되고 있으나 그 경과의 판정은 아직 미미하며 그에 대한 문헌 보고가 많지 않은 상태로 고식적인 개방성 접근법을 이용하는 것을 원칙으로 하고 있으며 접근법에 따른 분류를 사용하고 있다.