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31 results on '"Zhang, Youyu"'

9. The value of dynamic MRI in the treatment of cervical spondylotic myelopathy: a protocol for a prospective randomized clinical trial

Author

Shaobo Wang, Qiang Zhao, Nanfang Xu, Zhang Youyu, and Guangjin Zhou

Subjects
Male, medicine.medical_specialty, lcsh:Diseases of the musculoskeletal system, medicine.medical_treatment, Radiography, Clinical Decision-Making, law.invention, Dynamic magnetic resonance image (dMRI), Study Protocol, 03 medical and health sciences, Postoperative Complications, 0302 clinical medicine, Rheumatology, Randomized controlled trial, Spinal cord compression, law, Cervical spondylosis, medicine, Humans, Orthopedics and Sports Medicine, Prospective Studies, Intervertebral Disc, Randomized Controlled Trials as Topic, Surgical treatment, 030222 orthopedics, Rehabilitation, business.industry, Middle Aged, medicine.disease, Spinal cord, Magnetic Resonance Imaging, medicine.anatomical_structure, Spinal Cord, Cervical spondylotic myelopathy (CSM), Preoperative Period, Dynamic contrast-enhanced MRI, Orthopedic surgery, Cervical Vertebrae, Female, Spondylosis, Radiology, lcsh:RC925-935, business, Spinal Cord Compression, 030217 neurology & neurosurgery, Diskectomy, Follow-Up Studies
Abstract

Background Cervical spondylotic myelopathy (CSM) is the most severe type of cervical spondylosis and the most common cause of spinal cord dysfunction among adults over 55 years old. MRI plays an important role in the diagnosis and evaluation of CSM, which can directly demonstrate the correlation between disc, spinal cord, posterior structures and abnormal signal in spinal cord. Static MRI can only show the static and neutral position of spinal cord, which is not enough to understand the pathogenesis of CSM. Dynamic MRI demonstrating the extension and flexion position of spinal cord can be a better tool for the treatment of CSM, especially the surgical decision making. Method A total of 180 CSM patients who have indications for surgery will be recruited in outpatient of Peking University Third Hospital and assigned to three groups (Group A, B and C) based on their static MRI after consent. Group A (incomplete dura compression) means the signal of cerebral spinal fluid (CSF) is still visible. Group B (complete dura compression) means no CSF signal and no shape change of spinal cord. Group C (spinal cord compression) means shape change of spinal cord. Two surgical plans will be made for each participant by one professional surgeon according to the static MRI and dynamic MRI respectively and we will randomly choose one to perform via a random number system. Follow-up will be maintained at 3, 6, and 12 months after surgery through outpatient or telephone interview, including mJOA score, 10-s G&R (grip and release) and 10-s step test, SF-36 score, radiographic examination and complications. Finally, data collection and statistical analysis will be finished by researchers who are blinded to recruitment and treatment. Discussion This study will help us to explore the indication of dynamic MRI and the value of dynamic MRI in the treatment of CSM, especially the surgical decision making. Dynamic MRI can be a useful tool in the treatment of CSM patients. Trial registration ChiCTR1900023014. Registered on May 7th, 2019.

Published
2020
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21. Reservoir-forming age and its exploration significance to stratigraphic reservoirs in southern Songliao Basin

Author

Tao Shizhen, Zhang YouYu, and Zou Caineng

Subjects
Multidisciplinary, Geochemistry, K–Ar dating, Structural basin, Sedimentation, engineering.material, chemistry.chemical_compound, chemistry, Source rock, Illite, Period (geology), engineering, Petroleum, Fluid inclusions, Geomorphology, Geology
Abstract

Despite many studies concerning the forming age, evolution characteristics and the age of petroleum charging in the Fuxin upheaval of southern Songliao Basin, no consensus has been reached so far. This paper presents the first K-Ar dating of autogenetic illite from stratigraphic petroleum reservoirs in the Fuyu oil layer of the Fuxin upheaval belt. Isotopic test and age calculation were carried out based on the separation and purification of illite mineral, X-diffraction analysis and the detection of scanning electron microscopy. The evolution characteristics of structure, sedimentation, reservoir-forming about the Fuxin upheaval belt were interpreted in terms of the synthetical analysis of “six-type geological history” evolution in southern Songliao Basin. The geologic background of petroleum evolution and reservoir formation are similar in the entire central depression region of southern Songliao Basin. The Changling sag and the Fuxin upheaval belt brought about obvious upheaval-sag separation after the hydrocarbon-generation peak of K2qn1 and the main reservoir-forming period of the Fuyu oil layer, namely reservoir-forming happened before the Fuxin upheaval belt extensively raised. The reservoirs have three characteristics: the hydrocarbon source rock above the reservoir, the oil source in the locality, and the vertical migration. The geological cognition is corrected, that is, oil source came from the Changling sag and migrated from the side direction. The bulk process of petroleum charging in the stratigraphic hydrocarbon reservoirs in the Fuxin upheaval belt of southern Songlio Basin is determined according to the isotopic age of autogenetic illite in combination with the method of fluid inclusions. The cognition is helpful to exactly evaluate the resource potential and exploration direction in the Fuxin upheaval belt, Changling sag and their peripheral areas. The present results indicate that the combination of the two methods (the K-Ar dating of autogenetic illite and fluid inclusions) is an effective way to lay bare petroleum charging history and ascertain reservoir age.

Published
2007
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