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Tsutsumi S, Sugiyama N, Ueno H, Ishii H. Chordae Willisii of the dural sinuses: an anatomical study using magnetic resonance imaging. Surg Radiol Anat 2024; 46:993-999. [PMID: 38733404 DOI: 10.1007/s00276-024-03382-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 05/02/2024] [Indexed: 05/13/2024]
Abstract
PURPOSE The chordae Willisii (CWs), trabecular projections into the lumen of the dural sinuses, are not well understood. We aimed to explore them using magnetic resonance imaging (MRI). METHODS Eighty-five patients underwent volumetric contrast-enhanced MRI, while another 30 underwent a fluid-attenuated inversion recovery (FLAIR) sequence in the coronal section. RESULTS The CWs were detected as linear filling defects lying in the dural sinuses, adjacent to the surrounding dura mater. They were found in the superior sagittal sinus (SSS) in 68.2% of the patients, most frequently in the middle third, with laminar appearance. In 27.1% of the patients, the CWs divided the SSS lumen into separate channels. The CWs were identified in the transverse sinus, transverse-sigmoid sinus junctional area and sigmoid sinus, and straight sinus in 54.1, 47.1, and 8.2%, respectively. On the FLAIR images, dural septi partially dividing the SSS lumen were identified in all patients. In addition, in 73.3% of the patients, fine linear structures were observed in the lumen with inconstant arrangements. CONCLUSIONS The CWs may be constant structures distributed over the lumen of the intracranial dural sinuses. Contrast-enhanced MRI may be useful for detecting laminar CWs. The FLAIR sequence may be advantageous for delineating the dural septi projecting into the lumen of the dural sinuses.
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Affiliation(s)
- Satoshi Tsutsumi
- Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu, Chiba, 279-0021, Japan.
| | - Natsuki Sugiyama
- Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu, Chiba, 279-0021, Japan
| | - Hideaki Ueno
- Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu, Chiba, 279-0021, Japan
| | - Hisato Ishii
- Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu, Chiba, 279-0021, Japan
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López-Valverde N, Aragoneses J, López-Valverde A, Rodríguez C, Aragoneses JM. Role of BMP-7 on biological parameters osseointegration of dental implants: Preliminary results of a preclinical study. Front Bioeng Biotechnol 2023; 11:1153631. [PMID: 36926685 PMCID: PMC10011441 DOI: 10.3389/fbioe.2023.1153631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 02/20/2023] [Indexed: 03/08/2023] Open
Abstract
The aim of this work was to analyze and compare the effect of bone morphogenetic protein-7 on biological parameters related to implant osseointegration in an experimental animal model. Sixteen dental implants were placed in the tibias of four randomly selected minipigs for the following dental implant surface treatments: Group A: conventional treatment of the dental implant surface by SLA (n = 8) and Group B: treatment of the dental implant surface with carboxyethylphosphonic acid and bone morphogenetic protein-7 (n = 8). The animals were sacrificed one month after dental implants placement and a histomorphometric study was performed for the evaluation of bone-to-implant contact, corrected bone-to-implant contact, new bone formation, interthread bone density and peri-implant density using Student's t-test and the non-parametric Mann-Whitney test. The histomorphometric parameters bone-to-implant contact and corrected bone-to-implant contact showed statistically significant differences between the study groups; 34.00% ± 9.92% and 50.02% ± 10.94%, respectively (p = 0.004) for SLA and 43.08% ± 10.76% and 63.30% ± 11.30%, respectively (p = 0.003) for BMP-7. The parameters new bone formation, interthread bone density and peri-implant density did not show statistically significant differences between the study groups (p = 0.951, p = 0.967 and p = 0.894, respectively). Dental implant surfaces treated with carboxyethylphosphonic acid and BMP-7 improve the biological response of dental implants to osseointegration.
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Affiliation(s)
- Nansi López-Valverde
- Department of Medicine and Medical Specialties, Faculty of Health Sciences, Universidad Alcalá de Henares, Madrid, Spain
| | - Javier Aragoneses
- Department of Medicine and Medical Specialties, Faculty of Health Sciences, Universidad Alcalá de Henares, Madrid, Spain
| | - Antonio López-Valverde
- Department of Surgery, Instituto de Investigación Biomédica de Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| | - Cinthia Rodríguez
- Department of Dentistry, Universidad Federico Henríquez y Carvajal, Santo Domingo, Dominican Republic
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3
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Overview of multimodal MRI of intracranial Dural arteriovenous fistulas. J Interv Med 2022; 5:173-179. [DOI: 10.1016/j.jimed.2022.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/05/2022] [Accepted: 04/16/2022] [Indexed: 11/29/2022] Open
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Modelling of the dilated sagittal sinuses found in multiple sclerosis suggests increased wall stiffness may be a contributing factor. Sci Rep 2022; 12:17575. [PMID: 36266424 PMCID: PMC9585051 DOI: 10.1038/s41598-022-21810-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 10/04/2022] [Indexed: 01/13/2023] Open
Abstract
The cross-sectional area of the superior sagittal sinus (SSS) is larger in multiple sclerosis than normal and correlates with disease severity and progression. The sinus could be enlarged due to a decrease in the pressure difference between the lumen and the subarachnoid space, an increase in wall thickness or increased wall stiffness. The cross-sectional area of the SSS and straight sinus (ST) were measured in 103 patients with multiple sclerosis and compared to 50 controls. The cross-sectional area of the SSS and ST were increased by 20% and 13% compared to the controls (p = 0.005 and 0.02 respectively). The deflection of the wall of the sinus was estimated. The change in pressure gradient, wall thickness or elastic modulus between groups was calculated by modelling the walls as simply supported beams. To account for these findings, the modelling suggests either a 70% reduction in transmural venous pressure or a 2.4 fold increase in SSS wall stiffness plus an 11% increase in wall thickness or a combination of changes. An increase in sinus pressure, although the most straight forward possibility to account for the change in sinus size may exist in only a minority of patients. An increase in sinus wall stiffness and thickness may need further investigation.
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Ye Y, Ding J, Liu S, Wen G, Huang S, Wang Q. A Transvenous Endovascular Approach in Straight Sinus has Minor Impacts on Chordae Willisii. Neurol India 2022; 70:1506-1511. [PMID: 36076651 DOI: 10.4103/0028-3886.355179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background The transvenous endovascular approach has become an optimal method for the treatment of cerebrovascular diseases. This procedure might cause iatrogenic damage to the chordae willisii (CW) in the straight sinus. However, little literature has been found to support this hypothesis. Objective To investigate the possible damage of CW in the straight sinus during a transvenous endovascular procedure. Materials and Methods The features of the CW from 38 cadaveric heads were observed via an endoscope mimicking a mechanical thrombectomy procedure in the straight sinus. Endoscopic observation and light microscopy examination were used to assess the damage of the CW throughout the procedure. Results Valve-like lamellae and longitudinal lamellae were found predominantly in the posterior portion of the straight sinus. Trabeculae were present in both the anterior and posterior portions of the straight sinus. Samples treated with a stent had a significantly higher rate of Grade 1 damage during the eight procedures compared with samples treated with a balloon (P = 0.02). The incidence of damage to the CW surface was higher in the stent group than in the balloon group (P = 0.00). The use of stent or balloon did not increase the rate of CW damage during repeated experiments. Conclusions The stent or balloon navigation through the straight sinus can cause minor damage to the CW. Frequent uses of retrograde navigation through the straight sinus do not seem to increase the possibility of damage to CW.
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Affiliation(s)
- Yuanliang Ye
- Department of Neurosurgery, Liuzhou People's Hospital, Liuzhou, Guangxi Autonomous Region; Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jiuyang Ding
- Department of Forensic Medicine, Guizhou Medical University, Guiyang, Guizhou, China
| | - Shoutang Liu
- Department of Neurosurgery, Liuzhou People's Hospital, Liuzhou, Guangxi Autonomous Region, China
| | - Ge Wen
- Department of Research, The Bioillus Institute of Technology, Guangzhou, Guangdong Province, China
| | - Shaoming Huang
- Department of Anatomy, Guangxi Medical University, Nanning, Guangxi Autonomous Region, China
| | - Qiujing Wang
- Department of Cerebrovascular Surgery, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong Province, China
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Ye Y, Gao W, Xu W, Gong J, Qiu M, Long L, Ding J. Anatomical Study of Arachnoid Granulation in Superior Sagittal Sinus Correlated to Growth Patterns of Meningiomas. Front Oncol 2022; 12:848851. [PMID: 35433489 PMCID: PMC9005955 DOI: 10.3389/fonc.2022.848851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 03/02/2022] [Indexed: 11/17/2022] Open
Abstract
Meningiomas in the parasagittal region were formed by arachnoidal cells disseminated among arachnoid granulations. The purpose of this study was to characterize the morphology of chordae willisii, and AGs found in the superior sagittal sinus. This study used 20 anatomical specimens. Rigid endoscopes were introduced via torcula herophili into the sinus lumen. The morphological features of arachnoid granulation and chordae willisii were analyzed, and then arachnoid granulations and chordae willisii were assessed by elastic fiber stains, Masson’s stains, and imaging analysis. Three types of arachnoid granulations were present in the examined sinuses. There were 365 counts of arachnoid granulations in examined sinuses by imaging analysis, averaging 1.36 ± 2.58 per sinus. Types I, II, and III made up 20.27, 45.20, and 34.52% of 268 patients, respectively. Microscopy of chordae willisii transverse sections indicated the existence of a single layer and a multiple-layered dura sinus wall. The dural sinus wall was the thickest one in the superior sagittal sinus. The thickness of longitudinal lamellae was significantly greater than trabeculae. This study reveals the anatomical differences between arachnoid granulations in the superior sagittal sinus. The arachnoid granulations classification enables surgeons to predict preoperatively growth patterns, followed by safely achieving the optimal range of parasagittal meningioma resection.
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Affiliation(s)
- Yuanliang Ye
- Department of Neurosurgery, Liuzhou People's Hospital, Liuzhou, China
| | - Wen Gao
- Department of Neurology, Liuzhou People's Hospital, Liuzhou, China
| | - Weilin Xu
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jiangu Gong
- Department of Anatomy, Guangxi Medical University, Nanning, China
| | - Minxing Qiu
- Department of Pathology, Southern Medical University, Guangzhou, China
| | - Lang Long
- Department of Neurosurgery, Liuzhou People's Hospital, Liuzhou, China
| | - Jiuyang Ding
- School of Forensic Medicine, Guizhou Medical University, Guiyang, China
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Canine Intracranial Venous System: A Review. FOLIA VETERINARIA 2022. [DOI: 10.2478/fv-2022-0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
The intracranial venous system (ICVS) represents in mammals a complex three-dimensional structure, which provides not only for adequate brain perfusion, but has also a significant impact on: cerebrospinal fluid (CSF) resorption, maintaining of the intracranial pressure (ICP), and brain thermoregulation. An intimate understanding of the anatomy and physiology of ICVS is fundamental for neurological diagnostics, selection of therapeutic options, and success of neurosurgical procedures in human and veterinary medicine. Since the intracranial interventions in dogs are recently performed more frequently than twenty or thirty years ago, the authors decided to review and report on the basic knowledge regarding the complex topic of morphology and function of the canine ICVS. The research strategy involved an NCBI/NLM, PubMed/MED-LINE, and Clarivate Analytics Web of Science search from January 1, 1960, to December 31, 2021, using the terms “canine dural venous sinuses” and “intracranial venous system in dogs” in the English language literature; also references from selected papers were scanned and relevant articles included.
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Ye Y, Ding J, Liu S, Lan T, Chen L, Wang Y, Xia B, Yang J. A Transvenous Endovascular Approach in Straight Sinus Has Minor Impacts on Chordae Willisii. Front Neurol 2022; 13:725703. [PMID: 35222237 PMCID: PMC8874329 DOI: 10.3389/fneur.2022.725703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 01/12/2022] [Indexed: 11/13/2022] Open
Abstract
Cerebral dural sinuses contain different types of chordae willisii (CW). The transvenous endovascular approach, which has become an optimal method for the treatment of cerebrovascular diseases, such as malformation, fistula, and chronic intracranial hypertension, due to sinus thromboses, frequently uses retrograde navigation through dural sinuses. Whether or how much the endoscopic procedure damages the chordae willisii is often not well-assessed. In our study, an overall number of 38 cadaveric heads were analyzed for the distribution and features of the chordae willisii in the straight sinus. We used an endoscope on these samples mimicking a mechanical thrombectomy procedure performed in the straight sinus. Both endoscopic gross observation and light microscopic histological examination were used to assess the damages to the chordae willisii by the procedure. We found that the valve-like lamellae and longitudinal lamellae structures were mainly found in the posterior part of straight sinus whereas trabeculae were present in both anterior and posterior portions. We treated a group of samples with a stent and another with a balloon. The stent-treated group had a significantly higher rate of Grade 1 damage comparing with the balloon-treated group (p = 0.02). The incidence of damage to the surface of chordae willisii was also higher in the stent-treated group (p = 0.00). Neither the use of stent nor of balloon increased the rate of damage to chordae willisii during repeated experiments. These findings indicated that stent or balloon navigation through the straight sinus can cause minor damages to the chordae willisii and frequent uses of retrograde navigation through the straight sinus do not appear to increase the rates of damage to chordae willisii.
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Affiliation(s)
- Yuanliang Ye
- Department of Neurosurgery, Liuzhou People's Hospital, Liuzhou, China
| | - Jiuyang Ding
- School of Forensic Medicine, Guizhou Medical University, Guiyang, China
| | - Shoutang Liu
- Department of Neurosurgery, Liuzhou People's Hospital, Liuzhou, China
| | - Tiancai Lan
- Department of Neurosurgery, Liuzhou People's Hospital, Liuzhou, China
| | - Long Chen
- Department of Neurosurgery, Liuzhou People's Hospital, Liuzhou, China
| | - Yingxue Wang
- School of Forensic Medicine, Guizhou Medical University, Guiyang, China
| | - Bing Xia
- School of Forensic Medicine, Guizhou Medical University, Guiyang, China
- Bing Xia
| | - Jianqing Yang
- Department of General Surgery, Liuzhou People's Hospital, Liuzhou, China
- *Correspondence: Jianqing Yang
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Altafulla JJ, Prickett J, Iwanaga J, Dumont AS, Tubbs RS. Intraluminal anatomy of the transverse sinus: implications for endovascular therapy. Anat Cell Biol 2020; 53:393-397. [PMID: 32647072 PMCID: PMC7769094 DOI: 10.5115/acb.20.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/01/2020] [Accepted: 04/27/2020] [Indexed: 11/27/2022] Open
Abstract
Trabeculae or septations in the transverse sinus can have potentially life-threatening clinical significance. The current study demonstrates trabecula/septum patterning within the transverse sinus with measurements and distribution data supplemented by imaging, and describes the possible etiology of idiopathic intracranial hypertension and turbulent blood flow in the transverse sinus. Twenty-four sides from 12 cadaveric heads, all fresh-frozen, were used (five males, seven females; age at death 65–91 years, mean 79.1 years). The length and diameter of the transverse sinus were measured along with the number and locations of septations/trabeculae and their tensile strength. The mean length of the transverse sinus was 68.43 mm on the right side and 74.31 mm on the left. A total of 42 septations were found in the 24 transverse sinuses. The number of septations per side ranged from zero to four with a mean of 1.75. The septations were located in the proximal 1/3 in 54.8% (23/42), the middle 1/3 in 21.4% (9/42), and the distal 1/3 in 23.8% (10/42). The work presented here furthers our understanding of transverse sinus anatomy, including its detailed internal architecture. The measurements can provide a technical guide for neurosurgeons and influence instrument selection when a large thrombus forms or anchors in one of these trabeculae or septa and necessitates treatment.
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Affiliation(s)
- Juan J Altafulla
- Department of Neurosurgery, Hospital Santo Tomas, Panamá, Panama, USA
| | | | - Joe Iwanaga
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.,Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume, Japan
| | - Aaron S Dumont
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA
| | - R Shane Tubbs
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.,Department of Anatomical Sciences, St. George's University, St. George's, Grenada, USA.,Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, LA, USA.,Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA, USA
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Walsh DR, Lynch JJ, O' Connor DT, Newport DT, Mulvihill JJE. Mechanical and structural characterisation of the dural venous sinuses. Sci Rep 2020; 10:21763. [PMID: 33303894 PMCID: PMC7729903 DOI: 10.1038/s41598-020-78694-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 11/26/2020] [Indexed: 12/27/2022] Open
Abstract
The dural venous sinuses play an integral role in draining venous blood from the cranial cavity. As a result of the sinuses anatomical location, they are of significant importance when evaluating the mechanopathology of traumatic brain injury (TBI). Despite the importance of the dural venous sinuses in normal neurophysiology, no mechanical analyses have been conducted on the tissues. In this study, we conduct mechanical and structural analysis on porcine dural venous sinus tissue to help elucidate the tissues’ function in healthy and diseased conditions. With longitudinal elastic moduli values ranging from 33 to 58 MPa, we demonstrate that the sinuses exhibit higher mechanical stiffness than that of native dural tissue, which may be of interest to the field of TBI modelling. Furthermore, by employing histological staining and a colour deconvolution protocol, we show that the sinuses have a collagen-dominant extracellular matrix, with collagen area fractions ranging from 84 to 94%, which likely explains the tissue’s large mechanical stiffness. In summary, we provide the first investigation of the dural venous sinus mechanical behaviour with accompanying structural analysis, which may aid in understanding TBI mechanopathology.
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Affiliation(s)
- Darragh R Walsh
- Bernal Institute, University of Limerick, Limerick, Ireland.,School of Engineering, University of Limerick, Limerick, Ireland
| | - James J Lynch
- Bernal Institute, University of Limerick, Limerick, Ireland.,School of Engineering, University of Limerick, Limerick, Ireland
| | - David T O' Connor
- Bernal Institute, University of Limerick, Limerick, Ireland.,School of Engineering, University of Limerick, Limerick, Ireland.,Health Research Institute, University of Limerick, Limerick, Ireland
| | - David T Newport
- Bernal Institute, University of Limerick, Limerick, Ireland.,School of Engineering, University of Limerick, Limerick, Ireland
| | - John J E Mulvihill
- Bernal Institute, University of Limerick, Limerick, Ireland. .,School of Engineering, University of Limerick, Limerick, Ireland. .,Health Research Institute, University of Limerick, Limerick, Ireland.
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