scholarly journals The Relationship between Adjacent Segment Pathology and Facet Joint Violation by Pedicle Screw after Posterior Lumbar Instrumentation Surgery

2021 ◽  
Vol 10 (13) ◽  
pp. 2911
Author(s):  
Ho-Seok Oh ◽  
Hyoung-Yeon Seo
Keyword(s):  
Pedicle Screw ◽  
Scoring System ◽  
Facet Joint ◽  
Adjacent Segment ◽  
Type I ◽  
Type Ii ◽  
Type Iii ◽  
Transpedicular Screw ◽  
Facet Joint Violation ◽  
The Relationship

Transpedicular screw instrumentation systems have been increasingly utilized during the fusion of lumbar spine procedures. The superior segment facet joint violation of the pedicle screw is thought to have potential for accelerating symptomatic adjacent-segment pathology (ASP). The purpose of this study was to investigate the relationship between the superior segment facet joint violation by transpedicular screws and the development of ASP. Among all patients who underwent operations involving one- or two-level posterior lumbar arthrodesis at the Chonnam National University Hospital from 1992 to 2012, 87 patients were selected for this study. Fifty-six patients were included in the ASP group, and 31 were included in the non-ASP group. We used lumbar three-dimensional computed tomography (CT) to assess the violation of the superior facet joint by a transpedicular screw. The assessment is presented in scores ranging from zero to two, with zero indicating no violation (type I); one point indicating suspected violation (type II); and two points indicating definitely facet joint violation (type III). Facet violation was reported in 31 patients in the ASP group (n = 56), and in 13 patients in the non-ASP group (n = 31). The types of facet joint violation according to our scoring system were as follows: type I, 59 screws (52.7%); type II, 26 screws (23.2%); and type III, 27 screws (24.1%) in the ASP group; and type I, 43 screws (69.4%), type II, 14 screws (22.6 %); and type III, 5 screws (8.0%) in the non-ASP group. The score of facet joint violation in each patient according to our scoring system were as follows: 0 points, 25 patients (44.6%); 1 point, 8 patients (14.3%); 2 points, 4 patients (7.1%); 3 points, 11 patients (19.7%); 4 points, 8 patients (14.3%) in the ASP group; and 0 points, 18 patients (58.1%); 1 point, 4 patients (12.9%); 2 points, 7 patients (22.6%); 3 points, 2 patients (6.4%); 4 points, 0 patients (0%) in the non-ASP group. The mean scores were 1.4 points in the ASP group and 0.8 points in the non-ASP group (p < 0.05). We conclude that the position of the pedicle screw farther away from the facet joint surface can reduce the degeneration of the superior adjacent segment. Therefore, close attention to the screw position during surgery may reduce the rate of superior adjacent-segment pathologies.

scholarly journals The Relationship between Calcaneal Spur Type and Plantar Fasciitis in Chinese Population

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Lei Zhang ◽  
Han-wen Cheng ◽  
Lu-jing Xiong ◽  
Zhang-rong Xia ◽  
Meng-yao Zhang ◽  
...  
Keyword(s):  
Chinese Population ◽  
Plantar Fasciitis ◽  
Treatment Strategies ◽  
Common Disease ◽  
Type I ◽  
X Rays ◽  
Type Ii ◽  
Type Iii ◽  
Vas Scores ◽  
The Relationship

Plantar heel pain is a common disease with a high incidence in different races. It significantly reduced the quality of life of patients. However, the cause of PHP is still controversial and there were varieties of physiological factors associated with PHP. The most common pathological factor in the population was plantar fasciitis. Some existing research studies had found a correlation between calcaneal spurs and plantar fasciitis, and this study had found the correlation in Chinese population. It is invaluable not only to understand the relationship between different types of plantar calcaneal spurs and plantar fasciitis but also to identify the most appropriate treatment strategies. A total of 71 patients with calcaneal spurs were chosen from the Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University. All 71 patients had completed X-rays and MRI scans; then, surgeons had removed their plantar calcaneal spurs. After surgery, all patients were followed up for 12 months; their prognosis was tested by the VAS and AOFAS scores. Type II (29, 40.8%) had the highest incidence in Chinese population, followed with type I (24, 33.8%) and type III (18, 25.4%). Preoperative VAS scores showed that type II (7.72±1.10) was significantly higher than the other two types (P<0.001). Postoperative VAS scores of type II were higher than those of type I and type III (P<0.001). Postoperative AOFAS scores of type II were the lowest (P<0.001). Researchers had proved that type II was more likely to cause PF.

Relationship between Kinematics Characteristics and Link Lengths in Crank-Rocker Linkages

2010 ◽  
Vol 44-47 ◽  
pp. 3478-3482
Author(s):  
Cheng Zhi Wang
Keyword(s):  
Optimal Synthesis ◽  
Type I ◽  
Type Ii ◽  
Extreme Position ◽  
Variation Trend ◽  
Type Iii ◽  
The Relationship

According to the relationships of link lengths in crank-rocker linkages, the effective areas of link lengths for type I, type II and type III of the linkages were analyzed firstly. The relationship between the minimum transmission angles, extreme position angles and the link lengths were derived theoretically and drawn visually as variation trend maps and some conclusions are summarized. The conclusions can be used as guidance for optimal synthesis of crank-rocker linkages.

20. Biomechanical effect of facet joint violation on adjacent segment motion and disc strain following single level lumbar fusion with transpedicular screw and rod instrumentation

2021 ◽  
Vol 21 (9) ◽  
pp. S10-S11
Author(s):  
Piyanat Wangsawatwong ◽  
Anna G. Sawa ◽  
Bernardo De Andrada Pereira ◽  
Jennifer Lehrman ◽  
Juan S. Uribe ◽  
...  
Keyword(s):  
Facet Joint ◽  
Lumbar Fusion ◽  
Adjacent Segment ◽  
Single Level ◽  
Transpedicular Screw ◽  
Biomechanical Effect ◽  
Facet Joint Violation

Effort and the Forced Expiratory Volume in One Second (FEV1)

1970 ◽  
Vol 39 (6) ◽  
pp. 747-755 ◽  
Author(s):  
J. R. Kemm ◽  
P. L. Kamburoff
Keyword(s):  
Healthy Subjects ◽  
Forced Expiratory Volume ◽  
The Body ◽  
Type I ◽  
Type Ii ◽  
Type Iii ◽  
Significant Difference ◽  
Maximum Effort ◽  
The Mean ◽  
The Relationship

1. The relationship between volumes expired and the maximum intrathoracic pressures developed within the first second of expiration was examined in a group of healthy subjects and patients with airways obstruction who exhaled with varying degrees of effort. 2. The body plethysmographic method was used to ensure that expirations started from total lung capacity. 3. Three different types of volume-effort curves could be distinguished: Type I; in this the volume expired increased with greater effort. Type II; after a phase in which the volume expired increased with effort, a plateau was reached after which increasing effort made no difference to the volume expired. Type III; this resembles Type II except that instead of a plateau being established at maximum expired volume, increasing effort resulted in diminishing expired volume. Correction for the degree of compression of the intrathoracic gas failed to account for this phenomenon. Type III curves were found in healthy subjects as well as in patients. 4. In most cases the maximum Forced Expiratory Volume in 1 s (FEV1) was not found to coincide with the maximum oesophageal pressure (Poes), nor was there a significant difference between the mean and the maximum FEV1 produced with an effort greater than 75% of maximum. 5. Blowing ‘half as hard’ is an unnatural procedure; all subjects tend to blow nearly as hard as possible or very gently. In the latter case, the resulting FEV1 tracing is easily recognizable as technically unsatisfactory. 6. We conclude that for practical purposes, measurements of FEV1 depend for their reliability upon ensuring that they are started from full inspiration; insistence upon maximum effort is less important because FEV1 is independent of effort for the greater part of the effort range.

18F-Fluorodeoxyglucose uptake in different histological subtypes of nasopharyngeal carcinoma

2008 ◽  
Vol 123 (6) ◽  
pp. 656-661 ◽  
Author(s):  
M-C Chang ◽  
S-C Tsai ◽  
W-Y Lin
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
Primary Tumour ◽  
World Health ◽  
Type I ◽  
Type Ii ◽  
Type Iii ◽  
Positron Emission ◽  
The Mean ◽  
Health Organization ◽  
The Relationship

AbstractObjective:The study aimed to delineate the relationship between18F-fluorodeoxyglucose uptake and histological findings in nasopharyngeal carcinoma.Methods:We conducted a retrospective review of 88 patients referred to our positron emission tomography department with newly diagnosed, biopsy-proved nasopharyngeal carcinoma. Hospital records were reviewed for demographic and clinical data, including age, gender, body weight, histological analysis and clinical tumour stage.Results:Nineteen out of the 88 patients (22 per cent) had nasopharyngeal carcinoma of World Health Organization type I, 39 (44 per cent) had type II and 30 (34 per cent) had type III. The mean standardised uptake value for the primary tumour was 9.4 ± 5.0, ranging from 2.2 to 27.1. The mean standardised uptake values were 8.0 ± 3.9 for type I tumours, 9.7 ± 4.4 for type II tumours and 10.1 ± 6.3 for type III tumours (p = 0.451).Conclusions:Our study found that type III nasopharyngeal carcinoma exhibited a higher18F-fluorodeoxyglucose uptake than either type II or type I nasopharyngeal carcinoma. However, this difference was not statistically significant.

Labelling of non-A, non-B hepatitis infected chimpanzee hepatocytes with nuclease-gold conjugates

1984 ◽  
Vol 42 ◽  
pp. 250-251
Author(s):  
G. D. Gagne ◽  
M. F. Miller ◽  
D. A. Peterson
Keyword(s):  
Endoplasmic Reticulum ◽  
Experimental Infection ◽  
Uranyl Acetate ◽  
Type I ◽  
Cellular Injury ◽  
Type Ii ◽  
Tubular Structures ◽  
Type Iii ◽  
Type Iv ◽  
Infected Chimpanzee

Experimental infection of chimpanzees with non-A, non-B hepatitis (NANB) or with delta agent hepatitis results in the appearance of characteristic cytoplasmic alterations in the hepatocytes. These alterations include spongelike inclusions (Type I), attached convoluted membranes (Type II), tubular structures (Type III), and microtubular aggregates (Type IV) (Fig. 1). Type I, II and III structures are, by association, believed to be derived from endoplasmic reticulum and may be morphogenetically related. Type IV structures are generally observed free in the cytoplasm but sometimes in the vicinity of type III structures. It is not known whether these structures are somehow involved in the replication and/or assembly of the putative NANB virus or whether they are simply nonspecific responses to cellular injury. When treated with uranyl acetate, type I, II and III structures stain intensely as if they might contain nucleic acids. If these structures do correspond to intermediates in the replication of a virus, one might expect them to contain DNA or RNA and the present study was undertaken to explore this possibility.

scholarly journals Perforator preservation technologies (PPT) based on a new neuro-interventional classification in endovascular treatment of perforator involving aneurysms (piANs)

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Chen Li ◽  
Ao-Fei Liu ◽  
Han-Cheng Qiu ◽  
Xianli Lv ◽  
Ji Zhou ◽  
...  
Keyword(s):  
Endovascular Therapy ◽  
Saccular Aneurysm ◽  
Type I ◽  
Type Ii ◽  
Fusiform Aneurysm ◽  
Type Iii ◽  
Perforating Artery ◽  
Protection Technology ◽  
Perforating Arteries

Abstract Background Treatment of perforator involving aneurysm (piAN) remains a challenge to open and endovascular neurosurgeons. Our aim is to demonstrate a primary outcome of endovascular therapy for piANs with the use of perforator preservation technologies (PPT) based on a new neuro-interventional classification. Methods The piANs were classified into type I: aneurysm really arises from perforating artery, type II: saccular aneurysm involves perforating arteries arising from its neck (IIa) or dome (IIb), and type III: fusiform aneurysm involves perforating artery. Stent protection technology of PPT was applied in type I and III aneurysms, and coil-basket protection technology in type II aneurysms. An immediate outcome of aneurysmal obliteration after treatment was evaluated (satisfactory obliteration: the saccular aneurysm body is densely embolized (I), leaving a gap in the neck (IIa) or dome (IIb) where the perforating artery arising; fusiform aneurysm is repaired and has a smooth inner wall), and successful perforating artery preservation was defined as keeping the good antegrade flow of those perforators on postoperative angiography. The periprocedural complication was closely monitored, and clinical and angiographic follow-ups were performed. Results Six consecutive piANs (2 ruptured and 4 unruptured; 1 type I, 2 type IIa, 2 type IIb, and 1 type III) in 6 patients (aged from 43 to 66 years; 3 males) underwent endovascular therapy between November 2017 and July 2019. The immediate angiography after treatment showed 6 aneurysms obtained satisfactory obliteration, and all of their perforating arteries were successfully preserved. During clinical follow-up of 13–50 months, no ischemic or hemorrhagic event of the brain occurred in the 6 patients, but has one who developed ischemic event in the territory of involving perforators 4 h after operation and completely resolved within 24 h. Follow-up angiography at 3 to 10M showed patency of the parent artery and perforating arteries of treated aneurysms, with no aneurysmal recurrence. Conclusions Our perforator preservation technologies on the basis of the new neuro-interventional classification seem feasible, safe, and effective in protecting involved perforators while occluding aneurysm.

scholarly journals Intracellular and Extracellular Markers of Lethality in Osteogenesis Imperfecta: A Quantitative Proteomic Approach

2021 ◽  
Vol 22 (1) ◽  
pp. 429
Author(s):  
Luca Bini ◽  
Domitille Schvartz ◽  
Chiara Carnemolla ◽  
Roberta Besio ◽  
Nadia Garibaldi ◽  
...  
Keyword(s):  
Osteogenesis Imperfecta ◽  
Type I Collagen ◽  
Type I ◽  
Tandem Mass ◽  
Type Ii ◽  
Type Iii ◽  
Bioinformatic Tools ◽  
Proteomic Approach ◽  
Fibrillin 1 ◽  
Heritable Disorder

Osteogenesis imperfecta (OI) is a heritable disorder that mainly affects the skeleton. The inheritance is mostly autosomal dominant and associated to mutations in one of the two genes, COL1A1 and COL1A2, encoding for the type I collagen α chains. According to more than 1500 described mutation sites and to outcome spanning from very mild cases to perinatal-lethality, OI is characterized by a wide genotype/phenotype heterogeneity. In order to identify common affected molecular-pathways and disease biomarkers in OI probands with different mutations and lethal or surviving phenotypes, primary fibroblasts from dominant OI patients, carrying COL1A1 or COL1A2 defects, were investigated by applying a Tandem Mass Tag labeling-Liquid Chromatography-Tandem Mass Spectrometry (TMT LC-MS/MS) proteomics approach and bioinformatic tools for comparative protein-abundance profiling. While no difference in α1 or α2 abundance was detected among lethal (type II) and not-lethal (type III) OI patients, 17 proteins, with key effects on matrix structure and organization, cell signaling, and cell and tissue development and differentiation, were significantly different between type II and type III OI patients. Among them, some non–collagenous extracellular matrix (ECM) proteins (e.g., decorin and fibrillin-1) and proteins modulating cytoskeleton (e.g., nestin and palladin) directly correlate to the severity of the disease. Their defective presence may define proband-failure in balancing aberrances related to mutant collagen.

scholarly journals Brachial supporting structure of Spiriferida (Brachiopoda)

2020 ◽  
pp. 1-15
Author(s):  
Zhiwei Yuan ◽  
Wen Guo ◽  
Dan Lyu ◽  
Yuanlin Sun
Keyword(s):  
Mantle Cavity ◽  
Family Type ◽  
Type I ◽  
Type Ii ◽  
Feeding Apparatus ◽  
Single Family ◽  
Supporting Structure ◽  
Type Iii ◽  
Type Iv ◽  
Evolutionary Lineages

Abstract The filter-feeding organ of some extinct brachiopods is supported by a skeletal apparatus called the brachidium. Although relatively well studied in Atrypida and Athyridida, the brachidial morphology is usually neglected in Spiriferida. To investigate the variations of brachidial morphology in Spiriferida, 65 species belonging to eight superfamilies were analyzed. Based on the presence/absence of the jugal processes and normal/modified primary lamellae of the spiralia, four types of brachidium are recognized. Type-I (with jugal processes) and Type-II (without jugal processes), both having normal primary lamellae, could give rise to each other by losing/re-evolving the jugal processes. Type-III, without jugal processes, originated from Type-II through evolution of the modified lateral-convex primary lamellae, and it subsequently gave rise to Type-IV by evolving the modified medial-convex primary lamellae. The evolution of brachidia within individual evolutionary lineages must be clarified because two or more types can be present within a single family. Type-III and Type-IV are closely associated with the prolongation of the crura, representing innovative modifications of the feeding apparatus in response to possible shift in the position of the mouth towards the anterior, allowing for more efficient feeding on particles entering the mantle cavity from the anterior gape. Meanwhile, the modified primary lamellae adjusted/regulated the feeding currents. The absence of spires in some taxa with Type-IV brachidium might suggest that they developed a similar lophophore to that in some extant brachiopods, which can extend out of the shell.

scholarly journals Understanding the Evolution and Applications of Intelligent Systems via a Tri-X Intelligence (TI) Model

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1080
Author(s):  
Min Zhao ◽  
Zhenbo Ning ◽  
Baicun Wang ◽  
Chen Peng ◽  
Xingyu Li ◽  
...  
Keyword(s):  
Intelligent Systems ◽  
Intelligent Manufacturing ◽  
Type I ◽  
Type Ii ◽  
Multiple Perspectives ◽  
Ternary Interaction ◽  
Physical Systems ◽  
Type Iii ◽  
Dynamic Level ◽  
Systematic Scheme

The evolution and application of intelligence have been discussed from perspectives of life, control theory and artificial intelligence. However, there has been no consensus on understanding the evolution of intelligence. In this study, we propose a Tri-X Intelligence (TI) model, aimed at providing a comprehensive perspective to understand complex intelligence and the implementation of intelligent systems. In this work, the essence and evolution of intelligent systems (or system intelligentization) are analyzed and discussed from multiple perspectives and at different stages (Type I, Type II and Type III), based on a Tri-X Intelligence model. Elemental intelligence based on scientific effects (e.g., conscious humans, cyber entities and physical objects) is at the primitive level of intelligence (Type I). Integrated intelligence formed by two-element integration (e.g., human-cyber systems and cyber-physical systems) is at the normal level of intelligence (Type II). Complex intelligence formed by ternary-interaction (e.g., a human-cyber-physical system) is at the dynamic level of intelligence (Type III). Representative cases are analyzed to deepen the understanding of intelligent systems and their future implementation, such as in intelligent manufacturing. This work provides a systematic scheme, and technical supports, to understand and develop intelligent systems.

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