• 대한의용생체공학회:의공학회지
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• 제32권3호
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• pp.230-236
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• 2011

The aim of this study was to investigate the alteration of lumbar spine and trunk postures on different load-carrying types and amounts under static loading. Two load-carrying types(unilateral carrying: UC vs. bilateral carrying: BC) and four different loads(0, 5, 10, and 15 kg) were randomly tested in this study. Carrying a heavy bag would affect human body posture, specifically lumbar spine curvature, which is considered as one of sources of back problems. Previous studies have not paid attention to the approach of the multisegment model of the lumbar spine and trunk. This study separated two compartments of trunk segment(the lumbar and thorax) in the analysis. The multisegment model of the lumbar spine in addition to Helen-Hayes marker set was used. Eight motion analysis cameras and a force plate were utilized. Ten male subjects(mean mass, $70.6{\pm}3.97$ kg; mean height, $178{\pm}4.18$ m) having no musculoskeletal disease participated in this study. We analyzed trunk angles in three anatomical planes and the spinal curvature in sagittal and frontal planes. Increased loading in both UC and BC significantly resulted in increases in trunk forward lean but only UC induced increases in trunk lateral lean. In addition, increased loading in BC produced flatten lumbar curvature in sagittal plane. As far as coupling motion, subjects tended to use axial rotation of the lumbar spine in transverse plane in response to increased UC loading. Finally, it is concluded that the increased static loading in UC rather than in BC tends to causes combined alterations of the spinal postures(sagittal and transverse planes together), which would be vulnerable to improper mechanical stresses on the spine.

• 대한정형도수물리치료학회지
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• 제5권1호
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• pp.5-16
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• 1999

PURPOSE: The purpose of this study was to investigate the influences of lumbosacral angle, lumbar lordosis, pelvic level and symptoms after standing lumbar traction on HIVD patients. METHOD: For this investigation standing lumbar traction was administered to 22 patient who were diagnosed of HIVD. Standing lumbar traction was given to the subject patients for 3 weeks, times a week and each standng lumbar traction lasted 25 minutes. RESULT: For lumbosacral angle statistically significant different was not found although the lumbosacral angle was normalized. For lumbar lordosis statistically significant different was not found although the lumbar lordosis angle was decreased. For pelvic level statistically significant different was not found although the pelvic level was equalized. Statistically significant improvement in symptoms was found after standing lumbar traction. There was significant correlation between lumbar lordosis and lumbosacral angle. CONCLUSION: This study was found that the influences of standing lumbar traction was to decrease symptoms than lumbosacral angle of patients with HIVD. Therefore, it is necessary that to treat the patients with HIVD applied the method to correct spine angle and pelvic level with standing lumbar traction.

• The Journal of Korean Physical Therapy
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• 제13권1호
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• pp.97-105
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• 2001

본 연구는 2000년 7월 14일부터 8월 24일까지 대구광역시에 소재한 가톨릭병원 건강검진센타에서 골다공증 검사를 시행한 여성 36명을 대상으로 폐경후 여성의 골밀도차이를 비교하기 위해 실시하였다. 연령의 증가에 따라 요추부의 평균골밀도는 감소되었고, 신장이 증가할수록, 교육수준이 높을수록 평균골밀도는 증가했으며, 독신(이혼, 사별, 별거), 활동적인 직업 , 요통이 없다, 육류의 항목에서 평균골밀도는 각각 증가했지만 유의한 차이는 없었다. 골밀도의 표준편차인 T 값은 -2.5이하의 골다공증군이 41.7%로 가장 많았고, 골밀도 (BMD)는 평균 0.77g/c$m^2$로 나타났다. 가족중 골절시 연령이 증가할수록, 운동횟수, 운동시간이 증가할수록, 분만횟수가 증가할수록, 각각 골밀도는 높게 나타났지만 유의한 차이는 없었다. 자궁 절제술은 안했다가, 혈액형은 A형의 항목에서 골밀도는 높게 나타났지만 유의한 차이는 없었다. 폐경후 골밀도에 영향을 미치는 관련성이 있는 요인은 골밀도의 표준편차인 T 값이다(p<0.05). 본 연구는 폐경후 적성의 골밀도 관련요인에 대한 많은 변수를 고려한 전향적인 연구가 필요할 것으로 사료된다.

• Journal of Korean Neurosurgical Society
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• 제38권5호
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• pp.399-402
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• 2005

Direct anterior approach for lesions located anterior to the thecal sac is definitely superior to lateral or posterior approach in many respects. However, various anatomical obstacles and technical difficulties often hinder direct anterior approach. Thanks to ripe experience of retroperitoneal approach to the lumbar spine for anterior lumbar interbody fusion and total disc replacement, the authors could perform lumbar corpectomy and reconstruction by using midline retroperitoneal approach recently. During this approach, we repaired anterior longitudinal ligament also to reduce the risk of graft extrusion and to prevent erosion of vascular wall due to direct contact between metallic hardware, which was used for reconstruction of vertebral body, and major vessels.

• Journal of Yeungnam Medical Science
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• 제20권2호
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• pp.160-168
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• 2003

요추부 척추에 기구를 시술한 유한요소 복합체 모델을 이용하여 제 4-5 요추간판에 대한 해석을 수행한 결과, 근육의 작용을 케이블과 케이블 가이드로써 단순화 모사한 follower 하중에서 수직하중인 경우보다 높은 압축력을 나타내어 더욱 안정함을 보였고 불안정성의 원인이 되는 전단력과 굽힘모멘트의 발생은 미미하였다. 장분절 고정에 의한 인접 분절에 전단력이 증가됨을 실험적으로 보였는데, 이는 장분절 고정이 퇴행성 변화 촉진에 기여할 것으로 추정된다.

• The Journal of Korean Physical Therapy
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• 제2권1호
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• pp.103-112
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• 1990

The intervertebral disc in the anterior portion of the function unit gives the spine its flexibility. The disc is attached closely to the vertebral endplates. Between these endplates and the annulus fibrosus, the nucleus pulposus of the lumbar disc is enclosed in a circle of unyielding tissues. Compressive pressure placed on the disc is dissipated circumferentially in a passive manner In response to the greater axial forced exerted on the lumbar spine in comparison to the cervical and thoracic spines, the nucleus pulposus has its greatest surface area in the lumbar spine. The intervertebral disc is not only structure that helps diss pate stresses placed on the spine. With flexion, extension, rotation, or shear stress, the load distribution on the function unit is shared by the intervertebral disc, anterior and posterior longitudinal ligaments, the facet joints and capsules, and other ligamentous structures like the ligamentum flavum, interspinous and supraspinous ligaments, which attach to the posterior elements of the functional unit.

• 대한방사선기술학회지:방사선기술과학
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• 제44권3호
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• pp.183-187
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• 2021

The field size of the lumbar spine X-ray examination, which belongs to the most frequent examination in general radiography, is 5 times wider than the width of the lumbar spine. Exposure index (EI) as per International Electrotechnical Commission has a proportional relationship with the dose incident on the image receptor for clinical protocols in addition to RQA5, which is a calibration beam quality. In this study, the effectiveness of the set field size was evaluated through the change of EI according to the size of field during lumbar spine X-ray examinations. Lumbar anterior-posterior and lateral examinations was performed using a whole-body phantom, and the national average exposure conditions of Korea investigated in 2017 were introduced for the X-ray exposure. As a result of comparing the EI displayed on the console of digital radiography system for the three field size in ① 18 × 36 cm2 ② 25 × 36 cm2 ③ 36 × 36 cm2, the EI values showed a tendency to increase as the field size increased. Since the patient dose, such as organ dose around the lumbar spine, increases as the field size becomes larger, thus, if the EI obtained from the field size at a level that does not interfere with diagnosis is set as a reference, the effectiveness of the field size can be evaluated through the EI displayed on the console when the lumbar spine X-ray examination is conducted.

• Investigative Magnetic Resonance Imaging
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• 제17권2호
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• pp.91-100
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• 2013

목적: 요추 MR 영상에 추가된 경흉추 시상T2강조영상(CT SAG T2WI)의 임상적 효용성을 평가하고자 한다. 대상과 방법: 2005년 1월부터 2005년 12월까지 요추 MRI를 시행하였던 2,113명의 환자를 대상으로 하였다. 경흉추 시상T2강조영상을 후향적으로 분석하였고, 의무기록을 후향적으로 검토하여 경추 또는 흉추 병변의 추가적인 평가를 위한 MRI 또는 CT 시행여부와 이러한 병변에 대한 치료 및 경과를 알아보았다. 결과: 2,113명중 139명의 환자에게서 총 142개의 병변이 경흉추 시상T2강조영상에서 관찰되었다. 요추 MRI 촬영시, 환자의 자세변화 없이 2분 이내에 경흉추 시상T2강조영상을 추가적으로 얻었다. 13명의 환자만이 경추 또는 흉추의 병변에 대해 MR영상 또는 CT를 시행하였고, 7명의 환자는 T2강조영상 고신호강도 여부에 상관 없이 척추관협착증 또는 추간판탈출증에 대해 수술적 치료를 받았다. 결론: 요추 MRI촬영 시, 2분 이내로 소요되는 경흉추 시상T2강조영상의 추가촬영은 요추의 증상으로 오인된 경흉추의 병변을 평가하는데 유용하다.

• Journal of Korean Neurosurgical Society
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• 제46권2호
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• pp.168-171
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• 2009

Intradural lumbar disc herniation (ILDH) is rare. In this report, authors present 2 cases of ILDHs associated with severe adhesion between the dural sac and posterior longitudinal ligament. In a 40-year-old man, ILDH occurred in association with epidural adhesion due to ossification of the posterior longitudinal ligament (OPLL). In other 31-year-old man, ILDH occurred in presence of epidural adhesion due to previous spine surgery.

• 한국콘텐츠학회논문지
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• 제19권6호
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• pp.471-480
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• 2019

정상인을 대상으로 체질량지수, 전만각도에 따른 L-spine 3~4, L-spine 4~5, L-spine 5~Sacrum 1의 각각의 추간판각도를 비교 분석하여 입사각을 제시하였다. 체질량지수의 L-spine 3~4, L-spine 4~5, L-spine 5~Sacrum 1의 정면 입사각도는 머리 쪽 방향으로 5.66도, 13.23도, 29.13도였으며, 전만각도의 L-spine 3~4, L-spine 4~5, L-spine 5~Sacrum 1의 정면 입사각도는 머리 쪽 방향으로 6.32도, 16.09도, 35.36도였다. 체질량지수, 전만각도에 따른 정면 입사각도에 따라 적용한 팬텀의 일반 전후방향 영상의 왜곡정도를 면적비율로 비교한 결과 L-spine 4~5, L-spine 5~Sacrum 1의 추간판각도에서 유의미한 차이가 있었고(p<0.05), 전만각도와 추간판각도는 양의 상관관계를 보였다(p<0.05). 팬텀의 전만각도에 따른 추간판각도 계측 값을 머리 쪽 방향으로 입사각을 L4는 11도, L5는 26도로 적용하여 영상의 유용성을 평가한 결과, 왜곡비율면적은 L4에서 14.90%에서 12.11%로 줄어들었고, L5에서는 15.25%에서 13.72%로 줄어들었다. 계측된 추간판 각도에 따른 입사각을 적용한 허리뼈 일반 전후방향 영상에서 허리뼈 4번, 5번을 목적으로 하는 허리뼈 정면 영상에서 왜곡을 줄여, 정확한 구조의 정면 추체상과 인접하는 관절 간 영상을 얻을 수 있었고, 목적하는 부위의 영상의 질과 진단적 정보를 향상시킬 수 있었다.