6 results on '"Liu, Zhaohui"'
Search Results
2. Association between idiopathic intracranial hypertension and sigmoid sinus dehiscence/diverticulum with pulsatile tinnitus: a retrospective imaging study
- Author
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Zhao Pengfei, Dong Cheng, Wang Zhenchang, Liu Zhaohui, Lv Han, Han Xiaoyi, Wang Xiao, and Li Qing
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Adult ,Male ,medicine.medical_specialty ,Cranial Sinuses ,Dehiscence ,Tinnitus ,Young Adult ,Multidetector Computed Tomography ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Sinus (anatomy) ,Retrospective Studies ,Neuroradiology ,Sigmoid sinus ,Pseudotumor Cerebri ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,medicine.disease ,Magnetic Resonance Imaging ,Cerebrovascular Disorders ,Diverticulum ,Stenosis ,medicine.anatomical_structure ,Optic nerve ,Female ,Neurology (clinical) ,Radiology ,Neurosurgery ,Cardiology and Cardiovascular Medicine ,business - Abstract
The mechanism of occurrence of sigmoid sinus dehiscence/diverticulum (SSDD) in pulsatile tinnitus (PT) patients remains under debate. Its association with idiopathic intracranial hypertension (IIH) lacks evidence, which is important for therapeutic planning and improving the clinical outcome. This study aimed to evaluate the association between SSDD and IIH by comparing the prevalence of several established imaging features of IIH between PT patients with SSDD and healthy volunteers. Thirty-three unilateral PT patients with SSDD identified on CT images and 33 age- and sex-matched healthy volunteers underwent T1-weighted volumetric magnetic resonance imaging (MRI). The optic nerve, pituitary gland, transverse sinus, and ventricles were assessed. The prevalence of established IIH imaging features was compared between the two groups. Furthermore, the PT patients were divided into two subgroups: PT patients with dehiscence only and PT patients with diverticulum. The same statistical analysis was performed on each pathophysiologic entity respectively. The PT patients with SSDD showed a significantly higher prevalence of empty sella (P
- Published
- 2015
3. Temporal Bone Pneumatization and Pulsatile Tinnitus Caused by Sigmoid Sinus Diverticulum and/or Dehiscence
- Author
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Liu Wenjuan, Wang Zhenchang, Liu Zhaohui, Dong-dong Cheng, Zhao Pengfei, and Zheng-Xiang Ning
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Adult ,Male ,medicine.medical_specialty ,Article Subject ,Adolescent ,lcsh:Medicine ,Dehiscence ,General Biochemistry, Genetics and Molecular Biology ,Surgical Wound Dehiscence ,Tinnitus ,Colon, Sigmoid ,Pulsatile Tinnitus ,Temporal bone ,medicine ,otorhinolaryngologic diseases ,Humans ,Aged ,Aged, 80 and over ,Sigmoid sinus ,General Immunology and Microbiology ,business.industry ,lcsh:R ,Temporal Bone ,Sigmoid colon ,General Medicine ,Middle Aged ,medicine.disease ,Surgery ,Diverticulum ,medicine.anatomical_structure ,Clinical Study ,Female ,medicine.symptom ,Tomography, X-Ray Computed ,business - Abstract
Background. Although air cells within temporal bone may play an important role in the transmission of pulsatile tinnitus (PT) noise, it has not been studied systematically.Purpose. To evaluate the difference in temporal bone pneumatization between PT patients with sigmoid sinus diverticulum and/or dehiscence (SSDD) and healthy people.Material and Methods. A total of 199 unilateral persistent PT patients with SSDD and 302 control subjects underwent dual-phase contrast-enhanced CT (DP-CECT), to assess the grade of temporal bone pneumatization in each ear.Results. In the bilateral temporal bone of 302 controls, 16 ears were grade I, 53 were grade II, 141 were grade III, and 394 were grade IV. Among the affected ears of 199 PT cases, 1 ear was grade I, 18 were grade II, 53 were grade III, and 127 were grade IV. There was no significant difference in the pneumatization grade between the affected PT ear and either ear in the healthy subjects(p>0.05). Conclusion. Although air cells within the temporal bone are an important factor in the occurrence of PT, its severity does not differ significantly from the pneumatization of healthy people.
- Published
- 2015
4. Sigmoid sinus diverticulum and pulsatile tinnitus: analysis of CT scans from 15 cases.
- Author
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Liu, Zhaohui, Chen, Chengfang, Wang, Zhenchang, Gong, Shusheng, Xian, Junfang, Wang, Yongzhe, Liang, Xihong, Ma, Xiaobo, and Li, Yi
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SIGMOID sinus , *DIVERTICULUM , *TINNITUS , *COMPUTED tomography , *MEDICAL imaging systems - Abstract
Background: Although the imaging features of sigmoid sinus diverticulum induced pulsatile tinnitus (PT) have been presented in some extent, detailed imaging findings still have not been systematically evaluated and precise diagnostic radiographic criteria has not been established.Purpose: To examine the computed tomography (CT) characteristics of sigmoid sinus diverticulum accompanied with PT.Material and Methods: Fifteen PT patients with sigmoid sinus diverticula proven by surgery were recruited after consenting. CT images of 15 patients were obtained and analyzed, including features of diverticula, brain venous systems, integrity of the sigmoid plate, and the degree of temporal bone pneumatization.Results: Sigmoid sinus diverticulum was located on the same side of PT in 15 patients. Diverticula originated at the superior curve of the sigmoid sinus in 11 patients and the descending segment of the sigmoid sinus in four patients. Sigmoid sinus diverticula focally eroded into the adjacent mastoid air cells in 12 patients and mastoid cortex in three patients. Among eight patients with unilateral dominant brain venous systems, the diverticula were seen on the dominant side in seven patients and non-dominant side in one patient. In contrast, the other seven patients showed co-dominant brain venous systems, with three presenting diverticula on the right side and four on the left. More notably, dehiscent sigmoid plate on the PT side was demonstrated in all patients. In addition, temporal bone hyper-pneumatization was found in nine patients, good and moderate pneumatization in three patients, respectively.Conclusion: Dehiscent sigmoid plate and extensive temporal bone pneumatization are two important imaging characteristics of the PT induced by sigmoid sinus diverticulum. [ABSTRACT FROM AUTHOR]- Published
- 2013
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5. An in vitro experimental study on the relationship between pulsatile tinnitus and the dehiscence/thinness of sigmoid sinus cortical plate.
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Tian, Shan, Fan, Xingyu, Wang, Yawei, Liu, Zhaohui, and Wang, Lizhen
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PULSATILE flow , *TINNITUS , *SURGICAL wound dehiscence , *SIGMOID sinus , *HIGHER nervous activity - Abstract
Abstract Pulsatile tinnitus (PT), characterized as pulse-synchronous, is generally objective. Sigmoid sinus (SS) venous sound is widely suggested to be a possible sound source of PT. The dehiscence and thinness of SS cortical plate (CP) was commonly reported as PT pathology in previous studies, but lack quantitative or biomechanical analysis. In this study, it was aimed to quantify the relationship between venous sound and CP dehiscence/thinness using in vitro experiment. The in vitro models of SS and CP were established based on 3D-printing, with the developed pulsatile venous flow in the SS model. The generated sound signal and the vibration response at the dehiscent/thinned area were analyzed. The sound signal generated in the normal-sized dehiscence model was pulse-synchronous within 100-–400 Hz, which had similar acoustic characteristics as the clinical PT sounds. It was concluded that the pulsatile venous sound is produced at TS-SS junction in case of CP dehiscence. The CP, even a thinned one can effectively diminish the venous sound and sound-generating pulsatile vibration at TS-SS junction. The CP dehiscence would induce pulse-synchronous and high pressure venous sound, as well as pulse-synchronous vibration above 20 Hz, regardless of the dehiscence size. On the contrary, the CP thinness would not induce obvious venous sound or pulsatile vibration above 20 Hz. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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6. Sigmoid sinus cortical plate dehiscence induces pulsatile tinnitus through amplifying sigmoid sinus venous sound.
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Tian, Shan, Wang, Lizhen, Yang, Jiemeng, Mao, Rui, Liu, Zhaohui, and Fan, Yubo
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SIGMOID sinus , *SURGICAL wound dehiscence , *PULSATILE flow , *TINNITUS , *FINITE element method - Abstract
Sigmoid sinus cortical plate dehiscence (SSCPD) is common in pulsatile tinnitus (PT) patients, and is treated through SSCPD resurfacing surgery in clinic, but the bio-mechanism is not clear as so far. This study aimed to clarify the bio-mechanism of PT sensation induced by SSCPD, and quantify the relationship of cortical plate (CP) thickness and PT sensation intensity. It was hypothesized that SSCPD would induce PT through significantly amplifying sigmoid sinus (SS) venous sound in this study. Finite element (FE) analysis based on radiology data of typical patient was used to verify this hypothesis, and was validated with clinical reports. In cases with different CP thickness, FE simulations of SS venous sound generation and propagation procedure were performed, involving SS venous flow field, vibration response of tissue overlying dehiscence area (including SS vessel wall and CP) and sound propagation in temporal bone air cells. It was shown in results that SS venous sound at tympanic membrane was 56.9 dB in SSCPD case and −45.2 dB in intact CP case, and was inaudible in all thin CP cases. It was concluded that SSCPD would directly induce PT through significantly amplifying SS venous sound, and thin CP would not be the only pathophysiology of PT. This conclusion would provide a theoretical basis for the design of SSCPD resurfacing surgery for PT patients with SSCPD or thin CP. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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