scholarly journals Static and Dynamic Parameters in Patients With Degenerative Flat Back and Change After Corrective Fusion Surgery

2016 ◽  
Vol 40 (4) ◽  
pp. 682 ◽  
Author(s):  
Jung Hwan Lee ◽  
Sang-Ho Lee
Keyword(s):  
Dynamic Parameters ◽  
Fusion Surgery ◽  
Flat Back

scholarly journals Epidemiology of senile spinal diseases: a study based on the Health Insurance Review & Assessment Service database

2021 ◽  
Vol 64 (3) ◽  
pp. 178-184
Author(s):  
Sung Hyun Noh
Keyword(s):  
Health Insurance ◽  
The Elderly ◽  
Spinal Diseases ◽  
Disc Disease ◽  
Fusion Surgery ◽  
Aging Society ◽  
Number Of Patients ◽  
Quitting Smoking ◽  
Aged Society ◽  
Flat Back

According to the Statistics Korea in 2020, the elderly population aged 65 or older accounted for 15.7% of the total population, and by 2025 it will reach 20.3%, which will enter the super-aged society. In an aging society, many degenerative diseases occur with age. In particular, the spine is a structure that acts as a pillar of our body, and as we age, degenerative changes come. Representative senile spinal diseases include disc disease, spinal stenosis, spinal spondylolisthesis, scoliosis, kyphosis, and flat back syndrome. This study intends to examine the epidemiologic characteristics and trends of senile spinal diseases using Korean Health Insurance Review & Assessment Service database from 2010 to 2019. All of the senile spinal diseases have gradually increased in the number of patients and cost over the last 10 years. In addition, the proportion of those aged 60 and over increased among those diagnosed. And fusion surgery and discectomy also increased in the last 10 years, and the treatment cost and ratio of over 60 years old increased. Korea has already become an aging society. So, in the future, senile diseases will increase further, and among them, senile spinal diseases will steadily increase. As a result, the frequency and cost of surgery will continue to increase. Efforts are needed to understand this trend and to prevent senile spinal diseases. For example, regular exercise, proper posture and habits, adequate nutrition, and efforts such as quitting smoking should be required. When these efforts are made, more healthy old life will be achieved.

Functional Limitations Due to Stiffness after Long Level Spinal Instrumented Fusion Surgery to Correct Lumbar Degenerative Flat Back

Spine ◽  
2018 ◽  
pp. 1
Author(s):  
Jeong-Hoon Choi ◽  
Jee-Soo Jang ◽  
Kyong-Suk Yoo ◽  
Jong-Mog Shin ◽  
Il-Tae Jang MD
Keyword(s):  
Functional Limitations ◽  
Fusion Surgery ◽  
Instrumented Fusion ◽  
Flat Back

THE ESTABLISHMENT OF DYNAMIC PARAMETERS OF THE ZONE OF LIMIT STATE OF COAL-ROCK MASSIF

2019 ◽  
pp. 34-40
Author(s):  
А. Molodetskyy ◽  
◽  
О. Gladkaya ◽  
V. Slyusarev ◽  
◽  
...  
Keyword(s):  
Limit State ◽  
Rock Massif ◽  
Dynamic Parameters ◽  
Coal Rock

Connection of discontinuous segments in early functional recovery from thoracic ossification of the posterior longitudinal ligament treated with posterior instrumented surgery

2020 ◽  
Vol 32 (2) ◽  
pp. 200-206
Author(s):  
Kei Ando ◽  
Kazuyoshi Kobayashi ◽  
Masaaki Machino ◽  
Kyotaro Ota ◽  
Satoshi Tanaka ◽  
...  
Keyword(s):  
Early Stage ◽  
Morphological Changes ◽  
Japanese Orthopaedic Association ◽  
Multislice Ct ◽  
Posterior Longitudinal Ligament ◽  
Ct Images ◽  
Rigid Fixation ◽  
Disc Space ◽  
Fusion Surgery ◽  
Estimated Blood Loss

OBJECTIVEThe objective of this study was to investigate the relationship between morphological changes in thoracic ossification of the posterior longitudinal ligament (T-OPLL) and postoperative neurological recovery after thoracic posterior fusion surgery. Changes of OPLL morphology and postoperative recovery in cases with T-OPLL have not been examined.METHODSIn this prospective study, the authors evaluated data from 44 patients (23 male and 21 female) who underwent posterior decompression and fusion surgery with instrumentation for the treatment of T-OPLL at our hospital. The patients’ mean age at surgery was 50.7 years (range 38–68 years). The minimum duration of follow-up was 2 years. The location of thoracic ossification of the ligamentum flavum (T-OLF), T-OLF at the OPLL level, OPLL morphology, fusion range, estimated blood loss, operative time, pre- and postoperative Japanese Orthopaedic Association (JOA) scores, and JOA recovery rate were investigated. Reconstructed sagittal multislice CT images were obtained before and at 3 and 6 months and 1 and 2 years after surgery. The basic fusion area was 3 vertebrae above and below the OPLL lesion. All parameters were compared between patients with and without continuity across the disc space at the OPLL at 3 and 6 months after surgery.RESULTSThe preoperative morphology of OPLL was discontinuous across the disc space between the rostral and caudal ossification regions on sagittal CT images in all but one of the patients. Postoperatively, these segments became continuous in 42 patients (97.7%; occurring by 6.6 months on average) without progression of OPLL thickness. Patients with continuity at 3 months had significantly lower rates of diabetes mellitus (p < 0.05) and motor palsy in the lower extremities (p < 0.01). The group with continuity also had significantly higher mean postoperative JOA scores at 3 (p < 0.01) and 6 (p < 0.05) months and mean JOA recovery rates at 3 and 6 months (both p < 0.01) after surgery.CONCLUSIONSPreoperatively, discontinuity of rostral and caudal ossified lesions was found on CT in all patients but one of this group of 44 patients who needed surgery for T-OPLL. Rigid fixation with instrumentation may have allowed these segments to connect at the OPLL. Such OPLL continuity at an early stage after surgery may accelerate spinal cord recovery.

Comparative analysis of minimally invasive surgical decompression and fusion surgery in the treatment of stable stage i lumbar degenerative spondylolisthesis complicated by spinal stenosis

2020 ◽  
pp. 25-37
Author(s):  
Roman Kartavykh ◽  
Igor Borshchenko ◽  
Gennadiy Chmutin ◽  
Andrey Baskov ◽  
Vladimir Baskov
Keyword(s):  
Spinal Stenosis ◽  
Degenerative Spondylolisthesis ◽  
Stage I ◽  
Fusion Surgery ◽  
Unilateral Approach ◽  
Microsurgical Decompression ◽  
Group B ◽  
Lumbar Spondylolisthesis ◽  
Stable Stage

Purpose: a comparative analysis of long-term clinical and radiological outcomes of bilateral microsurgical decompression from unilateral approach and open fusion surgery in the treatment of patients with stable stage I lumbar degenerative spondylolisthesis complicated by spinal stenosis. Materials and methods: this study included 83 patients with degenerative stage I lumbar spondylolisthesis, combined with spinal stenosis at one/several levels. Bilateral microsurgical decompression from unilateral approach was performed in group A (n = 41), in group B (n = 42) we used transforaminal lumbar interbody fusion. Results: intraoperative blood loss and operation time significantly prevailed in group B (P < 0,05). Pain in the legs (VAS), Oswestry disability index significantly decreased in both groups in the long-term postoperative period. No statistical difference in these was found in groups A and B (P = 0,59; P = 0,10). Lower back pain in both groups at the follow-up period had a significant difference: in fusion group there was a significantly higher intensity, than in group А (P < 0,001). Assessment of radiological outcomes in group A at the level of spondylolisthesis showed a slight decrease in segment stability: an increase in anteroposterior displacement of the vertebrae by an average of 0,44 mm, the angular difference by 0,77°, an increase in displacement of the vertebral body by 1,30 % (P < 0,05). Conclusion: minimally bilateral microsurgical decompression from unilateral approach is an effective method for treatment of stable stage I degenerative lumbar spondylolisthesis, combined with spinal stenosis, allowing to achieve significant regression of leg pain and disability in the long-term postoperative period. And this method admits to significantly decrease of low back pain, then in fusion surgery, as well as a low risk of postoperative instability and reoperation with instrumentation.

Learning optimal kernel mapping based on function space with dynamic parameters

2013 ◽  
Vol 33 (8) ◽  
pp. 2337-2340
Author(s):  
Zhiying TAN ◽  
Ying CHEN ◽  
Yong FENG ◽  
Xiaobo SONG
Keyword(s):  
Function Space ◽  
Dynamic Parameters ◽  
Optimal Kernel ◽  
Kernel Mapping

ОСОБЕННОСТИ ЭКСТРАКЦИИ SPICE-МОДЕЛЕЙ ТРАНЗИСТОРОВ ДЛЯ ТЕХНОЛОГИЙ КНИ ГЛУБОКОГО СУБМИКРОННОГО УРОВНЯ

2020 ◽  
Vol 96 (3s) ◽  
pp. 680-683
Author(s):  
А.В. Нуштаев ◽  
А.Г. Потупчик
Keyword(s):  
Process Design ◽  
Development Process ◽  
Dynamic Parameters ◽  
Mos Transistors ◽  
Spice Model

Разработаны тестовые структуры для экстракции и верификации статических и динамических параметров SPICE-моделей транзисторов. Проведена экстракция SPICE-моделей МОП-транзисторов А-типа в рамках разработки комплекта средств проектирования для технологии КНИ-180. Проведена верификация статических и динамических параметров полученных моделей транзисторов. The paper highlights test structures for the extraction and verification of static and dynamic parameters of the transistor SPICE model. The SPICE models of A-type MOS transistors for development process design kit for S0I180 technology have been extracted. Verification of static and dynamic parameters of the obtained transistor models has been carried out.

ПРОЕКТИРОВАНИЕ ВЫСОКОТОЧНЫХ СВЧ КВАДРАТУРНЫХ МОДУЛЯТОРОВ И ДЕМОДУЛЯТОРОВ И ИССЛЕДОВАНИЕ ВОЗМОЖНОСТИ ПОДСТРОЙКИ ДИНАМИЧЕСКИХ ПАРАМЕТРОВ С ПОМОЩЬЮ ЦИФРОВОЙ РЕГУЛИРОВКИ

2020 ◽  
Vol 96 (3s) ◽  
pp. 337-342
Author(s):  
И.И. Мухин ◽  
Р.С. Шабардин ◽  
Л.В. Недашковский ◽  
Д.Н. Морозов
Keyword(s):  
Dynamic Parameters ◽  
Operation Modes ◽  
Measurement Results ◽  
Quadrature Modulators ◽  
Functional Blocks

В работе представлены результаты проектирования четырех микросхем квадратурных модуляторов и демодуляторов, в которых реализована коррекция динамических параметров цифровым способом, что достигается регулировкой режимов работы отдельных функциональных блоков схемы. Разработаны опытные образцы квадратурных модуляторов и демодуляторов на основе SiGe технологического процесса и приведены результаты измерений. Показано, что при регулировке изменение фазового разбаланса может достигать значений до 5°, амплитудный разбаланс - до 2,8 дБ, а подавление паразитных составляющих может быть больше 50 дБ. The paper presents four quadrature modulators and demodulators circuits design results. In these circuits the dynamic parameters are digitally corrected, which is achieved by adjusting the operation modes of separate functional blocks. Prototypes of quadrature modulators and demodulators manufactured on SiGe process were produced and the measurement results are presented. It is shown that during adjustment the change in phase imbalance can reach values up to 5 degrees, amplitude imbalance up to 2.8 dB, and suppression of spurious components can be more than 50 dB.

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