• Journal of Yeungnam Medical Science
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• v.32 no.2
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• pp.152-154
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• 2015

Arrhythmias are complications of tunneled cuffed hemodialysis catheter insertion. Most complications associated with arrhythmias occur during guide-wire access, where the guide wire can cause traumatic damage to the conduction system of the heart. Conducting system injury in tunneled cuffed hemodialysis catheter insertion often involves the right bundle, causing right bundle branch block (RBBB). Transient RBBB with sinus rhythm is not usually accompanied by abnormal vital signs. However if patients already have left bundle branch block (LBBB), new onset RBBB can cause complete atrioventricular block (AVB), which can lead to fatal complications requiring invasive treatment. We report on a patient with LBBB who developed complete AVB during hemodialysis catheter insertion.

• Journal of the Korea Convergence Society
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• v.8 no.4
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• pp.199-205
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• 2017

In this study, the design analysis and the explosion welding were made into a clad sheet by the convergence method in order to solve the problem of heat transfer to the guide due to the heating of the 3D printer heating block. The shear strength of the clad plate material was tested and the results were analyzed by thermal analysis, thermal conductivity and thermal imaging. The following conclusions were obtained. 3D modeling of the heating block made of copper and titanium clad plate material The thermal analysis showed that the surface temperature of the filament guide area was lower than the heating block surface temperature. The average shear strength of copper and titanium clad plate material was measured and the average value of 195.6MPa was obtained. The thermal conductivity of the heating block made of copper and titanium clad plate material was measured three times and the average value was $62.52W/m{\cdot}K$. The surface temperature of the heating block made of copper and titanium clad plate material was measured by a thermal imaging camera at a maximum of $107.3^{\circ}C$ and $183.2^{\circ}C$ at the filament guide. The temperature distribution was $89^{\circ}C$ lower than that of the existing filament.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.05a
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• pp.692-695
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• 2000

This paper is concerned with Accuracy Design of LM Guide System in Machine Tools. Elastic deformation of bearing is calculated by Hertz contact theory and motion error of LM block is analyzed. A new algorithm using block stiffness is proposed fur the analysis of motion accuracy of the table. The best advantage of this algorithm is fast analysis speed because it isn't necessary iteration processes for satisfying equilibrium equation of the table. Motion errors of the table analyzed under artificial form error of rail theoretically and experimentally. Only one of two rails is bent by putting a thickness gauge into horizontal direction. This form error of rail is measured by gap sensor against the other rail. Then, motion errors of the table are predicted by proposed new algorithm theoretically and measured by laser interferometer. Measurements are carried out by changing the preload and thickness. The results show that the table motion errors are reduced from 1/2 to 1/60 times than form error of rail according to its height and width. And the effect of preloading is almost negligible.

• Proceedings of the Korean Vacuum Society Conference
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• 2012.08a
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• pp.111-111
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• 2012

In this talk, we represent a novel approach to investigating intra-nanorod surface plasmon coupling with control over block compositions. The multi-component rod-like nanostructures, which consist of optically active components (Au and Ag) and optically less active component (for example, Ni) in UV-vis-NIR spectral window, showed interesting optical response depending on each block length and the total length of the structure. By controlling the composition and relative lengths of the blocks that comprise these structures, we can tailor the overall optical properties. Depending on the relative fraction of Au and Ag blocks, the intensity of the transverse modes varied without noticeable peak shifts. However, the strong intraparticle surface plasmon coupling resulted in the collective appearance of longitudinal LSP modes, including higher-order modes. The experimental observations were confirmed by theoretical calculation, using a discrete dipole approximation method. In addition, we will briefly discuss how single nanorod solar cells can be synthesized by using by using electrochemical deposition and AAO hard templates.

• The Korean Journal of Pain
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• v.8 no.2
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• pp.304-307
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• 1995

1,666 patients treated by nerve block from September 1994 to August 1995 we statistically analyzed according to sex, age, diseases, and kinds of nerve blocks. Most patients were in the range from 30 to 60 year old, with a distribution of 43.9% male and 56.1% female. Diseases and ailments were as follows: low back pain 30.6%, frozen shoulder 14.0%, facial spasm 10.0%, cervical syndrome 9.7%, headache 7.3%, and hyperhidrosis 7.2%. Most common nerve blocks were stellate ganglion block 30.9%, epidural block 25.6%, trigger point injection 16.1%, and suprascapular nerve block 6.7%. Nerve blocks under fluoroscopic guide were as follows: facet joint block 28.6%, spinal root block 22.9%, thoracic sympathetic ganglion block 21.7%, and lumbar sympathetic ganglion block 15.4%.

• Journal of International Society for Simulation Surgery
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• v.3 no.2
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• pp.90-92
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• 2016

Horizontal bone defect in the anterior maxilla makes it difficult to place dental implant. The golden standard for bone augmentation is autogenous block bone graft. Tight contact with recipient site and rigid fixation are two key factors for successful block bone graft. Ramal bone graft has been the most reliable methods for dental implant field. However, the curvature of the alveolar ridge is different from ramal bone shape. Intraoperative trimming of ramal bone is cumbersome for surgeon. In this technical note, a simple way to design the ramal bone harvest using bone wax stent is reviewed.

• The Korean Journal of Pain
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• v.8 no.2
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• pp.312-318
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• 1995

Stellate ganglion block is extensively performed in pain closing to treat a diversity of diseases. Stellate ganglion phenol neurolysis, however, has not been not popular because of risk and complications such as: permanent horner's syndrome, hoarseness, pneumothorax and intravascular or intraspinal injection. But Racz recently performed stellate ganglion phenol neurolysis successfully, under fluoroscopic guide, minus significant complication. Three patients were recently treated at our pain clinic by repeated stellate ganglion block with local anesthetics. Patients showed immediate signs of improvement but prolonged pain relief was not achieved. Therefore we reported to performing stellate ganglion phenol neurolysis following Racz's technique. We successfully treated: two cases of reflex sympathetic dystrophy of the upper extremity, and a case of postherpetic neuralgia of jaw, neck and upper chest wall, by stellate ganglion phenol neurolysis, devoid of any significant complications.

• The Korean Journal of Pain
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• v.7 no.2
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• pp.249-253
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• 1994

Postherpetic neuralgia is one of the most troublesome disease in pain clinic. Nine patients who suffered from postherpetic neuralgia for 1.5 to 8 month, has been treated with the epidural block for prognostic or therapeutic purpose. Epidural catheter was inserted as close to the involved neural roots as possible, and tip of epidural catheter was confirmed under fluroscopic guide. Epidural neurolysis was performed out intermittent injection of 1~3 ml of 6% phenol in saline and repeated 2~6 times over one or 7 days interval. Two patients reported satisfactory pain relief and 3 patients reported some pain relief. But 4 patients unchanged after phenol block. The overall duration of pain relief was not studied. Validity and safety of epidural phenol block was not confined. Further study will be necessary before application of epidural phenol block to postherpetic neuralgia.

• The Korean Journal of Pain
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• v.13 no.2
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• pp.202-207
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• 2000

Background: Superior hypogastric plexus block has been advocated as a useful technique for the treatment of cancer related pelvic pain. The aim of this study was to evaluate the effect of neurolytic trans-intervertebrodiscal superior hypogastric plexus block for pelvic cancer pain. Methods: Twenty-eight patients with gynecologic, colorectal or genitourinary cancer who suffered intractable pain were studied. We performed superior hypogastric plexus block by trans-intervertebrodiscal approach at L5/S1 level under the C-arm fluoroscopic guide unilaterally or bilaterally. Ten ml of 100% dehydrated alcohol was injected through each needle. We evaluated the change of visual analog pain score (VAS; 0~100 mm) and daily dose of oral morphine sulphate at the time of pre-block and 7 days after the block. Results: Fourteen patients (50%) had satisfactory pain relief (VAS<30) while five patients (18%) had moderate pain control (VAS 30~60). The remaining nine patients (32%) had mild or little pain relief (VAS>60) and their daily oral morphine doses were above 160 mg. Additional pain control method may be needed for those patients who received high dose of opioid before neurolytic block. Conclusions: We conclude trans-intervertebrodiscal neurolytic superior hypogastric plexus block was effective in relieving pelvic cancer pain. Neurolytic block, earlier stage, may provide better effects for more comfortable life at the end stage for cancer patients.

• Journal of the Korean housing association
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• v.14 no.2
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• pp.63-75
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• 2003

The planning of access area, so called "core" plays an important role of planning for multifamily housing, especially multistory housing. For all possibility of various planning and design, this area has been mostly planned and designed in uniformity. And only few attempts have so far been made in studying core, on the contrary to the unit plan or plotplan. It is keenly needed to develop various skills of planning and design in this sector. The purpose of this study is to find out the usable elements of planning and design, those are correspondent to normative targets. For this end, most possible core types are classified in to three categories: circulation types in the housing block, axis types to the entrance of housing units and number of accessed housing units. And then, sizable developments for norm of core have been effectuating in view of function, relationships both with housing unit and block. Based on this classification of types and listed norm, several European examples are analyzed and evaluated by merits and demerits of their respective core types. In addition to this analysis, some adequate planning conditions, positive vs. negative types of core, and detailed planning elements are prepared with regard to the norm of core. It is noteworthy that a variety of possible core planning cases are available by means of combination of lower categories in the classified core types. It is expected that this study will render service for some helpful planning and design guide in the practice