• Clinics in Shoulder and Elbow
• /
• 제19권4호
• /
• pp.256-263
• /
• 2016

Although arthroscopic surgery has been used conventionally, it has not been widely adopted yet due to the risks of complications, including nerve damage, technical difficulties, and limited indications. As shown in other joints, however, the use of an arthroscope will gradually increased in the elbow joint ('Arthroscopy always wins'). Herein, arthroscopic treatments and arthroscopic ulnar nerve decompression will be discussed in cases of elbow osteoarthritis.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제11권1호
• /
• pp.276-282
• /
• 1989

This is a report of 4 case of external decompression about infraorbital paresthesia with transconjuctival incision in zygomatic complex fratures. The results are as follows. 1. Decompression for infraorbital nerve injury is indicated if paresthesia exists 5-7 days, although the patients have nondisplaced fractures of zygomatic complex. 2. Satisfactory results are expected within 1-2 weeks after surgical operation in early decompression of infraorbital nerve. 3. Paresthesia of the infraorbital nerve following fracture of the zygomatic complex may be persistent complication. 4. Scar tissues on the face are avoided with transconjuctival approach.

• Journal of Korean Neurosurgical Society
• /
• 제46권4호
• /
• pp.417-420
• /
• 2009

The purpose of this report is to describe our surgical experiences in the treatment of cerebral decompression with in situ floating resin cranioplasty. We included in this retrospective study 7 patients who underwent in situ floating resin cranioplasty for cerebral decompression between December 2006 and March 2008. Of these patients, 3 patients had traumatic brain injury, 3 cerebral infarction, and one subarachnoid hemorrhage due to aneurysmal rupture. In situ floating resin cranioplasty for cerebral decompression can reduce complications related to the absence of a bone flap and allow reconstruction by secondary cranioplasty without difficulty. Furthermore, it provides cerebral protection and selectively eliminates the need for secondary cranioplasty in elderly patients or patients who have experienced unfavorable outcome.

• Journal of Korean Neurosurgical Society
• /
• 제49권3호
• /
• pp.167-170
• /
• 2011

Isolated hypoglossal nerve paresis due to mechanical compression from a vascular lesion is very rare. We present a case of a 32-year-old man who presented with spontaneous abrupt-onset dysarthria, swallowing difficulty and left-sided tongue atrophy. Brain computed tomographic angiography and magnetic resonance imaging of the brainstem demonstrated an abnormal course of the left vertebral artery compressing the medulla oblongata at the exit zone of the hypoglossal rootlets that was relieved by microvascular decompression of the offending intracranial vertebral artery. This case supports the hypothesis that hypoglossal nerve palsy can be due to nerve stretching and compression by a pulsating normal vertebral artery. Microvascular decompression of the intracranial nerve and careful evaluation of the imaging studies can resolve unexpected isolated hypoglossal nerve palsy.

• 대한인간공학회:학술대회논문집
• /
• 대한인간공학회 1997년도 추계학술대회논문집
• /
• pp.414-425
• /
• 1997

Standark polysomnograms, and questionnaires were measured using 4 subjects during simulated 150m heliox saturation dives. These measurements were performed on 4 pre-dive nights, 8 bottom nights, 6 decompression nights and post decompression nights. Sleep disturbances caused by frequent awakening were found throughout the dive period, but the disturbances were more intense on the second and fourth nights at the bottom and on the third and fourth nights of decompression. Stage 4 of sleep decreased every night at the bottom and from the first through third nights of decompression. The subjective self-evaluation of sleep was in agreement with the physiological variables. Complaints of subjective feeling of fatigue slightly increased throughout the dive period. It could be surmised that sleep disturbance or fatigue was not as significant under the 150m deep hyperbalic environment of He-O/ sub 2/ mixture, and therefore should be able to be coped with partially, through there moght be individual differences in adaptation.

• Advances in aircraft and spacecraft science
• /
• 제3권1호
• /
• pp.77-93
• /
• 2016

In this paper, a zero-dimensional mathematical formulation for rapid and explosive decompression analyses of pressurized aircraft is developed. Air flows between two compartments and between the damaged compartment and external ambient are modeled by assuming an adiabatic, reversible transformation. Both supercritical and subcritical decompressions are considered, and the attention focuses on intercompartment venting systems. In particular, passive and active vents are addressed, and mathematical models of both swinging and translational blowout panels are provided. A numerical procedure based on an explicit Euler integration scheme is also discussed for multi-compartment aircraft analysis. Various numerical solutions are presented, which highlight the importance of considering the opening dynamics of blowout panels. The comparisons with the results from the literature demonstrate the validity of the proposed methodology, which can be also applied, with no lack of accuracy, to the decompression analysis of spacecraft.

• Journal of Korean Neurosurgical Society
• /
• 제62권4호
• /
• pp.367-375
• /
• 2019

Hemifacial spasm (HFS) is due to the vascular compression of the facial nerve at its root exit zone (REZ). Microvascular decompression (MVD) of the facial nerve near the REZ is an effective treatment for HFS. In MVD for HFS, intraoperative neurophysiological monitoring (INM) has two purposes. The first purpose is to prevent injury to neural structures such as the vestibulocochlear nerve and facial nerve during MVD surgery, which is possible through INM of brainstem auditory evoked potential and facial nerve electromyography (EMG). The second purpose is the unique feature of MVD for HFS, which is to assess and optimize the effectiveness of the vascular decompression. The purpose is achieved mainly through monitoring of abnormal facial nerve EMG that is called as lateral spread response (LSR) and is also partially possible through Z-L response, facial F-wave, and facial motor evoked potentials. Based on the information regarding INM mentioned above, MVD for HFS can be considered as a more safe and effective treatment.

• 척추신경추나의학회지
• /
• 제2권2호
• /
• pp.41-48
• /
• 2007

Objectives : These studies are designed to make a survey of the effectiveness of the non surgical decompression treatment. Methods : These studies 15 cases of L-spine herniated lumbar intervertebral disc(HIVD) which was treated with non surgical spinal decompression and other medicine treatment(acupuncture, cupping, interferential current therapy, ultra-sound therapy and hot poultice). Each patient has been treated with spine decompression and other medicine treatment. And degree of improvement has been evaluated by Visual Analogue Scale and the Roland-Morris Disability Questionnaire score for low back pain. Results and Conclusions : Through the results, the medical treatment proved to have valid effect for L-spine HIDV. And further clinical studies comparing non surgical spinal decompression treatment and other medicine treatment is necessary.

• Journal of Korean Neurosurgical Society
• /
• 제52권4호
• /
• pp.372-376
• /
• 2012

Objective : The purpose of this large prospective study is to assess the association between the disappearance of the lateral spread response (LSR) before and after microvascular decompression (MVD) and clinical long term results over two years following hemifacial spasm (HFS) treatment. Methods : Continuous intra-operative monitoring during MVD was performed in 244 consecutive patients with HFS. Patients with persistent LSR after decompression (n=22, 9.0%), without LSR from the start of the surgery (n=4, 1.7%), and with re-operation (n=15, 6.1%) and follow-up loss (n=4, 1.7%) were excluded. For the statistical analysis, patients were categorized into two groups according to the disappearance of their LSR before or after MVD. Results : Intra-operatively, the LSR was checked during facial electromyogram monitoring in 199 (81.5%) of the 244 patients. The mean follow-up duration was $40.9{\pm}6.9$ months (range 25-51 months) in all the patients. Among them, the LSR disappeared after the decompression (Group A) in 128 (64.3%) patients; but in the remaining 71 (35.6%) patients, the LSR disappeared before the decompression (Group B). In the post-operative follow-up visits over more than one year, there were significant differences between the clinical outcomes of the two groups (p<0.05). Conclusion : It was observed that the long-term clinical outcomes of the intra-operative LSR disappearance before and after MVD were correlated. Thus, this factor may be considered a prognostic factor of HFS after MVD.

• Journal of Korean Neurosurgical Society
• /
• 제42권5호
• /
• pp.382-387
• /
• 2007

Objective : Cubital tunnel syndrome is the second most common entrapment neuropathy of the upper extremity. Although many different operative techniques have been introduced, none of them have been proven superior to others. Simple cubital tunnel decompression has numerous advantages, including simplicity and safety. We present our experience of treating cubital tunnel syndrome with simple decompression in 15 patients. Methods : According to Dellon's criteria, one patient was classified as grade 1, eight as grade 2, and six as grade 3. Preoperative electrodiagnostic studies were performed in all patients and 7 of them were rechecked postoperatively. Five patients of 15 underwent simple decompression using a small skin incision (2 cm or less). Results : Preoperative mean value of motor conduction velocity (MCV) within the segment (above the elbow-below the elbow) was $41.8{\pm}15.2\;m/s$ and this result showed a decrease compared to the result of MCV in the below the elbow-wrist segment ($57.8{\pm}6.9\;m/s$) with statistical significance (p<0.05). Postoperative mean values of MCV were improved in 6 of 7 patients from $39.8{\pm}12.1\;m/s$ to $47.8{\pm}12.1\;m/s$ (p<0.05). After an average follow-up of $4.8{\pm}5.3$ months, 14 patients of 15 (93%) reported good or excellent clinical outcomes according to a modified Bishop scoring system. Five patients who had been treated using a small skin incision achieved good or excellent outcomes. There were no complications, recurrences, or subluxation of the ulnar nerve. Conclusion : Simple decompression of the ulnar nerve is an effective and successful minimally invasive technique for patients with cubital tunnel syndrome.