The Experts below are selected from a list of 186 Experts worldwide ranked by ideXlab platform
Haixin Wang - One of the best experts on this subject based on the ideXlab platform.
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Establishment of a new model of neurogenic bladder dysfunction caused by lumbar Intervertebral Disk Hernia and its urodynamic evaluation
National Medical Journal of China, 2007Co-Authors: Dexin Dong, Benkang Shi, Jun Chen, Xianzhou Jiang, Zun-lin Zhou, Haixin WangAbstract:OBJECTIVE To establish a new rat model of neurogenic bladder dysfunction caused by lumbar Intervertebral Disk Hernia, and to confirm the model by urodynamic examination. METHODS Twenty male Wistar rats were divided into two groups at random:experimental group (n = 15) and pseudo-operation group (n = 5). The rats underwent laparotomy to disclose the Intervertebral Disk of L(6)-S(1), and a 1.50 mm x 4.50 mm blunt screw with flat end was inserted into the Intervertebral Disk of L(6)-S(1) of the rats in the experimental group so as to establish the model of lumbar Intervertebral Disk Hernia. Computed radiography (CR) was performed 3 days after the operation to conform the successful insertion of the screw. Combined behavioral score (CBS) was used 1 d, 3 d, 1 week, 2 weeks, and 4 weeks after the operation. Four weeks after the laparotomy a vesical fistula above the pubis was made in all of the rats, and then urodynamic examination was performed three days after this operation. RESULTS CR after operation confirmed that the blunt screw had been inserted into the lumbar Disk of L(6). The CBS scores of the 2 groups at different time points all decreased along with time, and basically remained unchanged 1 week after. The CBS scores of the experiment group were significantly higher than those of the pseudo-operation group (all P < 0.05). The spontaneous vesical contraction rate in the filling period of the experimental group was (4.37 +/- 2.13) times/min, significantly higher than that of the pseudo-operation group [(0.06 +/- 0.13) times/min, t = 4.425, P = 0.000], the maximum bladder capacity of the experimental group was (1.20 +/- 0.34) ml, significantly greater than that of the pseudo-operation group [(0.60 +/- 0.14) ml, t = 5.141, P = 0.002], and bladder compliance of the experimental group was (0.024 +/- 0.012) ml/cm H(2)O, significantly lower than that of the pseudo-operation group [(0.096 +/- 0.088) ml/cm H(2)O, t = 2.891, P = 0.011], and the leak point pressure of the experimental group was (75 +/- 27) cm H(2)O, not significantly different from that of the pseudo-operation group [(62 +/- 23) cm H(2)O]. The urodynamic examination on the conscious rats confirmed the successful establishment of the neurogenic bladder dysfunction caused by lumbar Intervertebral Disk Hernia. CONCLUSION A new model of neurogenic bladder dysfunction caused by lumbar Intervertebral Disk Hernia has been established by insertion of a blunt screw into the lumbar Intervertebral Disk of L(6). The model is confirmed by urodynamic examination.
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Urodynamic study in the neurogenic bladder dysfunction caused by Intervertebral Disk Hernia.
Neurourology and Urodynamics, 2006Co-Authors: Dexin Dong, Benkang Shi, Jun Chen, Xianzhou Jiang, Haixin WangAbstract:Aims To discuss the clinical significance of urodynamic studies in neurogenic bladder dysfunction caused by Intervertebral Disk Hernia. Methods Thirty patients with neurogenic bladder dysfunction caused by Intervertebral Disk Hernia were divided into three groups according to the category of detrusor muscle activity: neurogenic detrusor overactivity without detrusor sphincter dyssynergia (DSD), neurogenic detrusor overactivity with DSD, or detrusor underactivity. The patients were divided into three groups according to the condition of urinary retention and incontinence: urinary retention, urinary incontinence, or neither urinary retention nor urinary incontinence. Also they were divided into three groups according to the location of the Intervertebral Disk Hernia: cervical Hernia, thoracic Hernia, or lumbar Hernia. All patients underwent computer tomography (CT), magnetic resonance imaging (MRI), and urodynamic study. The results were analyzed statistically. Results There was significant correlation between the category of detrusor muscle activity, bladder compliance (BC, P
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urodynamic study in the neurogenic bladder dysfunction caused by Intervertebral Disk Hernia
Neurourology and Urodynamics, 2006Co-Authors: Dexin Dong, Benkang Shi, Jun Chen, Xianzhou Jiang, Haixin WangAbstract:Aims To discuss the clinical significance of urodynamic studies in neurogenic bladder dysfunction caused by Intervertebral Disk Hernia. Methods Thirty patients with neurogenic bladder dysfunction caused by Intervertebral Disk Hernia were divided into three groups according to the category of detrusor muscle activity: neurogenic detrusor overactivity without detrusor sphincter dyssynergia (DSD), neurogenic detrusor overactivity with DSD, or detrusor underactivity. The patients were divided into three groups according to the condition of urinary retention and incontinence: urinary retention, urinary incontinence, or neither urinary retention nor urinary incontinence. Also they were divided into three groups according to the location of the Intervertebral Disk Hernia: cervical Hernia, thoracic Hernia, or lumbar Hernia. All patients underwent computer tomography (CT), magnetic resonance imaging (MRI), and urodynamic study. The results were analyzed statistically. Results There was significant correlation between the category of detrusor muscle activity, bladder compliance (BC, P < 0.05), and the pressure at maximum flow (P(det,Qmax), P < 0.01). There were significant differences in post void residual (PVR), cystometric capacity (CC), and maximum flow rate (Qmax) between the three groups of urinary retention, urinary incontinence, and the group of neither retention nor incontinence (P < 0.05). There was statistical correlation between the location of the Intervertebral Disk Hernia and the urodynamic results. There was significant correlation between the BC (the threshold was 15 ml/cmH2O), detrusor pressure (Pdet, the threshold was 40 cmH2O), DSD, the location of Intervertebral Disk Hernia, and the upper urinary tract lesion (P < 0.01). Conclusions Urodynamic studies are indispensable in the classification, diagnosis, treatment, and prognosis of the neurogenic bladder dysfunction caused by Intervertebral Disk Hernia. Neurourol. Urodynam. © 2006 Wiley-Liss, Inc.
Takao Kamai - One of the best experts on this subject based on the ideXlab platform.
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Urethral Arterial Bleeding from an Iatrogenic Pseudoaneurysm due to Catheterization
Medical & Surgical Urology, 2013Co-Authors: Hideo Yuki, Miki Fuse, Akinori Masuda, Hideyuki Abe, Masahiro Yashi, Yoshitatsu Fukabori, Tomonori Yamanishi, Hironori Betsunoh, Takao KamaiAbstract:A 41-year-old man underwent surgery for treatment of an Intervertebral Disk Hernia and received urethral catheterization at another hospital. After insertion of the catheter, intermittent urethral bleeding occurred. He was brought to our hospital by ambulance because of massive urethral bleeding and urethral pain on the day after the operation. Laboratory tests showed a decrease of hemoglobin, and contrast computed tomography revealed intense enhancement of part of the urethra that resembled an aneurysm. Urethroscopy showed a pseudoaneurysm in the bulbar urethra and the arterial bleeding was stopped by transurethral coagulation.
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Urethral Arterial Bleeding from an Iatrogenic Pseudoaneurysm due to
2013Co-Authors: Miki Fuse, Akinori Masuda, Hideyuki Abe, Masahiro Yashi, Yoshitatsu Fukabori, Tomonori Yamanishi, Takao KamaiAbstract:A 41-year-old man underwent surgery for treatment of an Intervertebral Disk Hernia and received urethral catheterization at another hospital. After insertion of the catheter, intermittent urethral bleeding occurred. He was brought to our hospital by ambulance because of massive urethral bleeding and urethral pain on the day after the operation. Laboratory tests showed a decrease of hemoglobin, and contrast computed tomography revealed intense enhancement of part of the urethra that resembled an aneurysm. Urethroscopy showed a pseudoaneurysm in the bulbar urethra and the arterial bleeding was stopped by transurethral coagulation.
Dexin Dong - One of the best experts on this subject based on the ideXlab platform.
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Establishment of a new model of neurogenic bladder dysfunction caused by lumbar Intervertebral Disk Hernia and its urodynamic evaluation
National Medical Journal of China, 2007Co-Authors: Dexin Dong, Benkang Shi, Jun Chen, Xianzhou Jiang, Zun-lin Zhou, Haixin WangAbstract:OBJECTIVE To establish a new rat model of neurogenic bladder dysfunction caused by lumbar Intervertebral Disk Hernia, and to confirm the model by urodynamic examination. METHODS Twenty male Wistar rats were divided into two groups at random:experimental group (n = 15) and pseudo-operation group (n = 5). The rats underwent laparotomy to disclose the Intervertebral Disk of L(6)-S(1), and a 1.50 mm x 4.50 mm blunt screw with flat end was inserted into the Intervertebral Disk of L(6)-S(1) of the rats in the experimental group so as to establish the model of lumbar Intervertebral Disk Hernia. Computed radiography (CR) was performed 3 days after the operation to conform the successful insertion of the screw. Combined behavioral score (CBS) was used 1 d, 3 d, 1 week, 2 weeks, and 4 weeks after the operation. Four weeks after the laparotomy a vesical fistula above the pubis was made in all of the rats, and then urodynamic examination was performed three days after this operation. RESULTS CR after operation confirmed that the blunt screw had been inserted into the lumbar Disk of L(6). The CBS scores of the 2 groups at different time points all decreased along with time, and basically remained unchanged 1 week after. The CBS scores of the experiment group were significantly higher than those of the pseudo-operation group (all P < 0.05). The spontaneous vesical contraction rate in the filling period of the experimental group was (4.37 +/- 2.13) times/min, significantly higher than that of the pseudo-operation group [(0.06 +/- 0.13) times/min, t = 4.425, P = 0.000], the maximum bladder capacity of the experimental group was (1.20 +/- 0.34) ml, significantly greater than that of the pseudo-operation group [(0.60 +/- 0.14) ml, t = 5.141, P = 0.002], and bladder compliance of the experimental group was (0.024 +/- 0.012) ml/cm H(2)O, significantly lower than that of the pseudo-operation group [(0.096 +/- 0.088) ml/cm H(2)O, t = 2.891, P = 0.011], and the leak point pressure of the experimental group was (75 +/- 27) cm H(2)O, not significantly different from that of the pseudo-operation group [(62 +/- 23) cm H(2)O]. The urodynamic examination on the conscious rats confirmed the successful establishment of the neurogenic bladder dysfunction caused by lumbar Intervertebral Disk Hernia. CONCLUSION A new model of neurogenic bladder dysfunction caused by lumbar Intervertebral Disk Hernia has been established by insertion of a blunt screw into the lumbar Intervertebral Disk of L(6). The model is confirmed by urodynamic examination.
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Urodynamic study in the neurogenic bladder dysfunction caused by Intervertebral Disk Hernia.
Neurourology and Urodynamics, 2006Co-Authors: Dexin Dong, Benkang Shi, Jun Chen, Xianzhou Jiang, Haixin WangAbstract:Aims To discuss the clinical significance of urodynamic studies in neurogenic bladder dysfunction caused by Intervertebral Disk Hernia. Methods Thirty patients with neurogenic bladder dysfunction caused by Intervertebral Disk Hernia were divided into three groups according to the category of detrusor muscle activity: neurogenic detrusor overactivity without detrusor sphincter dyssynergia (DSD), neurogenic detrusor overactivity with DSD, or detrusor underactivity. The patients were divided into three groups according to the condition of urinary retention and incontinence: urinary retention, urinary incontinence, or neither urinary retention nor urinary incontinence. Also they were divided into three groups according to the location of the Intervertebral Disk Hernia: cervical Hernia, thoracic Hernia, or lumbar Hernia. All patients underwent computer tomography (CT), magnetic resonance imaging (MRI), and urodynamic study. The results were analyzed statistically. Results There was significant correlation between the category of detrusor muscle activity, bladder compliance (BC, P
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urodynamic study in the neurogenic bladder dysfunction caused by Intervertebral Disk Hernia
Neurourology and Urodynamics, 2006Co-Authors: Dexin Dong, Benkang Shi, Jun Chen, Xianzhou Jiang, Haixin WangAbstract:Aims To discuss the clinical significance of urodynamic studies in neurogenic bladder dysfunction caused by Intervertebral Disk Hernia. Methods Thirty patients with neurogenic bladder dysfunction caused by Intervertebral Disk Hernia were divided into three groups according to the category of detrusor muscle activity: neurogenic detrusor overactivity without detrusor sphincter dyssynergia (DSD), neurogenic detrusor overactivity with DSD, or detrusor underactivity. The patients were divided into three groups according to the condition of urinary retention and incontinence: urinary retention, urinary incontinence, or neither urinary retention nor urinary incontinence. Also they were divided into three groups according to the location of the Intervertebral Disk Hernia: cervical Hernia, thoracic Hernia, or lumbar Hernia. All patients underwent computer tomography (CT), magnetic resonance imaging (MRI), and urodynamic study. The results were analyzed statistically. Results There was significant correlation between the category of detrusor muscle activity, bladder compliance (BC, P < 0.05), and the pressure at maximum flow (P(det,Qmax), P < 0.01). There were significant differences in post void residual (PVR), cystometric capacity (CC), and maximum flow rate (Qmax) between the three groups of urinary retention, urinary incontinence, and the group of neither retention nor incontinence (P < 0.05). There was statistical correlation between the location of the Intervertebral Disk Hernia and the urodynamic results. There was significant correlation between the BC (the threshold was 15 ml/cmH2O), detrusor pressure (Pdet, the threshold was 40 cmH2O), DSD, the location of Intervertebral Disk Hernia, and the upper urinary tract lesion (P < 0.01). Conclusions Urodynamic studies are indispensable in the classification, diagnosis, treatment, and prognosis of the neurogenic bladder dysfunction caused by Intervertebral Disk Hernia. Neurourol. Urodynam. © 2006 Wiley-Liss, Inc.
Zhang Dian-ying - One of the best experts on this subject based on the ideXlab platform.
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Overall anatomical features and clinical value of the sacral nerve in high resolution computed tomography reconstruction
Chinese Medical Journal, 2010Co-Authors: Lin Jing-fu, Wang Yan-hua, Jiang Bao-guo, Li Yan-ying, Zhang Pei-xun, Zhang Dian-yingAbstract:Background Sacral nerve injury is a common complication of pelvic or sacral fractures. As the sacral nerve courser within the sacrum and has a complex relationship with the surrounding tissues, different parts of the sacral plexus injury have similar clinical symptoms and signs. Since lack of specific imaging technique in the diagnosis of sacral nerve injury, especially on multi-segment, multi-site, how to determine the preoperative location and extent of the sacral nerve injury accurately becomes a concern of the general orthopaedic and images practitioners. This study was conducted to gain an insight into the overall anatomical features of the sacral nerve (SN) on the same slice in high resolution computed tomography (HRCT) reconstruction and to determine the value of this information for the clinical diagnosis of related diseases. Methods Fifty healthy volunteers and 30 patients (40 sides) with SN lesions confirmed by surgery were scanned using a 16-slice helical CT scanner (Light Speed, GE, USA). Among the patients, 6 with Intervertebral Disk Hernia (6 sides), 8 with spinal stenosis (12 sides), 11 with pelvic trauma (14 sides), 4 with pelvic malignancies (6 sides), and 1 with sacral vertebral tuberculosis (2 sides). The SN multiplanar reconstruction was performed using a UNIX-based SCD4.1 workstation where the image was set on the same slice. All images were stored in the Digital Imaging and Communications in Medicine format. The display of nerves in different sections was analyzed using a five-graded scale with coordinate curves of each individual score. The overall anatomic features visible on the slice were analyzed and the abnormalities of the lesions were studied. Results The image of the same slice clearly revealed the shape, running direction, thickness, tension and adjacent anatomy of the S1-S4 nerves. The rank of display rates in different sections was: outward-rotated oblique sagittal > outward-rotated oblique coronal > oblique coronal plane > coronal > sagittal > transverse section. The S5 nerve was partially displayed from the starting point to the segment around the posterior sacral foramen. The overall anatomy of the triangular sacral plexus was only revealed in the oblique outward-rotated sagittal section, while 100% of its individual rami, as well as two or three of the adjacent rami, were displayed from their starting points to the anterior border of the piriformis. The abnormalities included 39 sides of morphological change (97.5%), 38 sides of compression (95.0%), 35 sides of adhesion (87.5%), 32 sides of displacement (80.0%), 34 sides of shrinkage (85.0%), 6 sides of thickening (15.0%), and 2 sides of abruption (5.0%). Conclusions The 16-slice CT multiplanar reconstruction was able to reveal the overall anatomic features of the SN on the same slice. The section of reconstruction was a crucial factor in determining the display capability of various sacral nerves. This technology was valuable in the diagnosis and management of related diseases. Chin Med J 2010;123(21):3015-3019Medicine, General & InternalSCI(E)中国科技核心期刊(ISTIC)1ARTICLE213015-301912
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Study on the overall anatomical features and clinical value of lumbar nerve root, plexus and branches in CT reconstruction
中华外科杂志, 2009Co-Authors: Wang Yan-hua, Lin Jing-fu, Jiang Bao-guo, Fu Zhong-guo, Li Yan-ying, Li Xiao-juan, Tian Shu-ping, Zhang Yan-qun, Zhang Hong-bo, Zhang Dian-yingAbstract:To identify the overall anatomical characteristics and the clinical value of the lumbar nerves under CT multiplanar reconstruction.Fifty normal subjects and 30 patients with LN diseases (51 sides) were selected, including 10 patients with lumber Intervertebral Disk Hernia, eight patients with spinal stenosis, 5 patients with spondylolisthesis, 1 patient with tethered cord syndrome, 1 patient with lumbar scoliosis, and 5 patients with spinal trauma The 16-slice helical CT (Light Speed, GE Company) was used for scanning the lumbar vertebra with multiplanar reconstruction in Workstation (ADW4.1) with UNIX System in DICOM format. The image was set on the same slice for the overall anatomy and manifestations of the lesions.The same-slice imaging showed the strip-like LN slightly lower than the surrounding muscle in density. Each LN went out of the dural sac at an acute angle. The course of the lumbar plexus and its major branches, including the obturator nerve, femoral nerve and reproductive nerve, and their relations to the adjacent structures were clearly revealed. The percentage of the segments displayed was well associated with the reconstruction angle, with the order being oblique coronal > outward-rotated oblique coronal > oblique sagittal > coronal > sagittal section. The major manifestations of abnormal LN included compression and displacement (50 sides, 98.0%), morphological changes (49 sides, 96.1%), adhesion (41 sides, 80.4%).The CT multiplanar reconstruction is ideal for the imaging of the overall size, shape, running and tension of the LN root; it is valuable in clinical diagnosis.PubMed011853-64
Dian-ying Zhang - One of the best experts on this subject based on the ideXlab platform.
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Overall anatomical features and clinical value of the sacral nerve in high resolution computed tomography reconstruction
Chinese Medical Journal, 2010Co-Authors: Jing-fu Lin, Yanhua Wang, Baoguo Jiang, Peixun Zhang, Dian-ying ZhangAbstract:Background Sacral nerve injury is a common complication of pelvic or sacral fractures. As the sacral nerve courser within the sacrum and has a complex relationship with the surrounding tissues, different parts of the sacral plexus injury have similar clinical symptoms and signs. Since lack of specific imaging technique in the diagnosis of sacral nerve injury, especially on multi-segment, multi-site, how to determine the preoperative location and extent of the sacral nerve injury accurately becomes a concern of the general orthopaedic and images practitioners. This study was conducted to gain an insight into the overall anatomical features of the sacral nerve (SN) on the same slice in high resolution computed tomography (HRCT) reconstruction and to determine the value of this information for the clinical diagnosis of related diseases. Methods Fifty healthy volunteers and 30 patients (40 sides) with SN lesions confirmed by surgery were scanned using a 16-slice helical CT scanner (Light Speed, GE, USA). Among the patients, 6 with Intervertebral Disk Hernia (6 sides), 8 with spinal stenosis (12 sides), 11 with pelvic trauma (14 sides), 4 with pelvic malignancies (6 sides), and 1 with sacral vertebral tuberculosis (2 sides). The SN multiplanar reconstruction was performed using a UNIX-based SCD4.1 workstation where the image was set on the same slice. All images were stored in the Digital Imaging and Communications in Medicine format. The display of nerves in different sections was analyzed using a five-graded scale with coordinate curves of each individual score. The overall anatomic features visible on the slice were analyzed and the abnormalities of the lesions were studied. Results The image of the same slice clearly revealed the shape, running direction, thickness, tension and adjacent anatomy of the S1-S4 nerves. The rank of display rates in different sections was: outward-rotated oblique sagittal > outward-rotated oblique coronal > oblique coronal plane > coronal > sagittal > transverse section. The S5 nerve was partially displayed from the starting point to the segment around the posterior sacral foramen. The overall anatomy of the triangular sacral plexus was only revealed in the oblique outward-rotated sagittal section, while 100% of its individual rami, as well as two or three of the adjacent rami, were displayed from their starting points to the anterior border of the piriformis. The abnormalities included 39 sides of morphological change (97.5%), 38 sides of compression (95.0%), 35 sides of adhesion (87.5%), 32 sides of displacement (80.0%), 34 sides of shrinkage (85.0%), 6 sides of thickening (15.0%), and 2 sides of abruption (5.0%). Conclusions The 16-slice CT multiplanar reconstruction was able to reveal the overall anatomic features of the SN on the same slice. The section of reconstruction was a crucial factor in determining the display capability of various sacral nerves. This technology was valuable in the diagnosis and management of related diseases. Chin Med J 2010;123(21):3015-3019
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Study on the overall anatomical features and clinical value of lumbar nerve root, plexus and branches in CT reconstruction
Chinese journal of surgery, 2009Co-Authors: Yanhua Wang, Jing-fu Lin, Baoguo Jiang, Shu-ping Tian, Yan-qun Zhang, Hong-bo Zhang, Dian-ying ZhangAbstract:Objective To identify the overall anatomical characteristics and the clinical value of the lumbar nerves under CT multiplanar reconstruction. Methods Fifty normal subjects and 30 patients with LN diseases (51 sides) were selected, including 10 patients with lumber Intervertebral Disk Hernia, eight patients with spinal stenosis, 5 patients with spondylolisthesis, 1 patient with tethered cord syndrome, lpatient with lumbar scoliosis, and 5 patients with spinal trauma. The 16-slice helical CT ( Light Speed, GE Company) was used for scanning the lumbar vertebra with multiplanar reconstruction in Workstation (ADW4.1) with UNIX System in DICOM format. The image was set on the same slice for the overall anatomy and manifestations of the lesions. Results The same-slice imaging showed the strip-like LN slightly lower than the surrounding muscle in density. Each LN went out of the dural sac at an acute angle. The course of the lumbar plexus and its major branches, including the obturator nerve, femoral nerve and reproductive nerve, and their relations to the adjacent structures were clearly revealed. The percentage of the segments displayed was well associated with the reconstruction angle, with the order being oblique coronal> outward-rotated oblique coronal > oblique sagittal > coronal > sagittal section. The major manifestations of abnormal LN included compression and displacement (50 sides, 98.0% ), morphological changes (49 sides, 96.1% ), adhesion (41 sides, 80.4% ). Conclusions The CT multiplanar reconstruction is ideal for the imaging of the overall size, shape, running and tension of the LN root; it is valuable in clinical diagnosis. Key words: Spinal nerve roots; Lumbar plexus; Tomography, X-ray computed; Image processing, compute-assisted
