scholarly journals Hemodynamics of cerebral bridging veins connecting the superior sagittal sinus based on numerical simulation

2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Youyu Zhu ◽  
Feng Wang ◽  
Xuefei Deng
Keyword(s):  
Numerical Simulation ◽  
Superior Sagittal Sinus ◽  
Sagittal Sinus ◽  
Bridging Veins

Pterional Approach for Surgical Treatment of Olfactory Groove Meningiomas

Neurosurgery ◽  
1989 ◽  
Vol 25 (6) ◽  
pp. 942-947 ◽  
Author(s):  
W. Hassler ◽  
J. Zentner
Keyword(s):  
Surgical Treatment ◽  
Superior Sagittal Sinus ◽  
Cerebrospinal Fluid Fistula ◽  
Pterional Approach ◽  
Olfactory Groove ◽  
Sagittal Sinus ◽  
Frontal Brain ◽  
Bridging Veins ◽  
Frontal Sinuses ◽  
Fluid Fistula

Abstract We present our experience with the surgical treatment of olfactory groove meningiomas using a pterional approach. This approach provides the advantages of previous techniques, such as preserving the frontal brain and superior sagittal sinus, early devascularization of the tumor, and late dissection of tumor borders. Moreover, it also compensates for the shortcomings of other techniques, e.g., compression of frontal bridging veins, late dissection of dorsal tumor aspects involving vessels and optic nerves as well as facultative infection and cerebrospinal fluid fistula-related complications caused by opening of frontal sinuses. To date, 11 patients were treated in this way. As we encountered no surgical complications in our series we are encouraged to present our procedure.

Incidence of venous infarction after sacrificing middle-third superior sagittal sinus cortical bridging veins in a pediatric population

2011 ◽  
Vol 7 (3) ◽  
pp. 224-228 ◽  
Author(s):  
Sean A. McNatt ◽  
Ivan J. Sosa ◽  
Mark D. Krieger ◽  
J. Gordon McComb
Keyword(s):  
Los Angeles ◽  
Mr Imaging ◽  
Superior Sagittal Sinus ◽  
Pediatric Population ◽  
Operative Procedure ◽  
Neurological Injury ◽  
Venous Infarction ◽  
Transcallosal Approach ◽  
Sagittal Sinus ◽  
Bridging Veins

Object The interhemispheric transcallosal approach offers an excellent surgical corridor for the treatment of deep-seated midline lesions. The approach typically requires the sacrifice of one or more middle-third superior sagittal sinus (SSS) cortical bridging veins, which introduces the risk of venous infarction and associated neurological injury. The authors studied the incidence of venous infarcts following this operative approach in a pediatric population. Methods The authors performed a retrospective review of surgical cases involving pediatric patients treated at the Children's Hospital Los Angeles between 1990 and 2007, in which an interhemispheric transcallosal operative procedure was performed and one or more middle-third SSS cortical bridging veins were occluded. Postoperative MR imaging studies done 1–3 days following the procedure were analyzed and compared with preoperative studies. Results Sixty-three patients met the inclusion criteria. No patient developed MR imaging evidence of venous infarction. Conclusions The occlusion of one or more middle-third SSS cortical bridging veins related to the interhemispheric transcallosal approach resulted in no incidence of cerebral venous infarction in this pediatric population.

Endoscopic anatomy of the chordae willisii in the superior sagittal sinus

2004 ◽  
Vol 101 (5) ◽  
pp. 832-835 ◽  
Author(s):  
Mansoor Sharifi ◽  
Jacek Kunicki ◽  
Pawel Krajewski ◽  
Bogdan Ciszek
Keyword(s):  
Superior Sagittal Sinus ◽  
Tap Water ◽  
Digital Camera ◽  
Content Type ◽  
Sagittal Sinus ◽  
Structural Relationships ◽  
Human Cadavers ◽  
Bridging Veins ◽  
Different Diameters ◽  
Fine Print

Object. Chordae willisii are structures located in the lumen of the superior sagittal sinus (SSS). It is thought that they act as flow-improving structures within the sinuses. There are few anatomical descriptions of chordae willisii, and all previous observations were performed through standard anatomical dissections. The purpose of this study was to visualize and describe structural and topographical features of the chordae willisii with the aid of rigid endoscopy. Methods. Twenty-five SSSs obtained from fresh human cadavers during autopsies were the material for this study. Specimens were flushed with tap water to remove clots. Bridging veins emptying into the sinus were ligated, and continuous flow of a saline solution through the sinus in a physiological direction was achieved by connecting the sinus to an irrigating system. Rigid endoscopes of different diameters (2.7–4.5 mm) and optic (0 and 30°) were inserted into the lumen of the sinus. The endoscope was connected to a digital camera and a video system to allow for recording of the observed structures. Finally, the sinuses were opened and the chordae willisii were dissected using standard anatomical methods. The chordae willisii were observed in all examined specimens. Three different types of the cords were found: lamellar, trabecular, and valvelike types. The most common type was the valvelike (mixed) one, which comprised 45.1% of all cords. The chordae willisii were most commonly observed in the parietooccipital region of the SSS. Conclusions. Witout disturbing any structural relationships, the use of endoscopy allowed visualization and description of intraluminal structures as they behaved physiologically.

Variations of the superior sagittal sinus and bridging veins in human dissections and computed tomography venography

2012 ◽  
Vol 36 (2) ◽  
pp. 85-89 ◽  
Author(s):  
Carolin Brockmann ◽  
Sandra C. Kunze ◽  
Peter Schmiedek ◽  
Christoph Groden ◽  
Johann Scharf
Keyword(s):  
Computed Tomography ◽  
Superior Sagittal Sinus ◽  
Sagittal Sinus ◽  
Bridging Veins ◽  
Computed Tomography Venography

A hypothesis of cerebral venous system regulation based on a study of the junction between the cortical bridging veins and the superior sagittal sinus

2007 ◽  
Vol 107 (6) ◽  
pp. 1205-1210 ◽  
Author(s):  
Jean-Rodolphe Vignes ◽  
Arnaud Dagain ◽  
Jean Guérin ◽  
Dominique Liguoro
Keyword(s):  
Smooth Muscle ◽  
Superior Sagittal Sinus ◽  
Anatomical Study ◽  
Venous System ◽  
Luminal Diameter ◽  
Cortical Vein ◽  
Sagittal Sinus ◽  
Pathological Conditions ◽  
Bridging Veins ◽  
Formalin Fixed

Object The cerebral venous regulation involved in various physiological and pathological processes has received little attention. Here the authors describe the anatomy of the junction between the cortical vein and the superior sagittal sinus (SSS) and propose a new theory of cerebral venous regulation. Methods Ten adult human cadaveric heads (20 sides), including five specimens into which stained latex had been injected, were used for anatomical study. Formalin-fixed cadaver heads were dissected to demonstrate the cortical veins along the SSS. The characteristics of the cortical bridging veins and their openings into the SSS were established by anatomical, histological, immunohistochemical, and ultrastructural study of the junction. Results After their subarachnoid course, the cortical bridging veins penetrated the SSS at different points in the dura mater depending on their rostrocaudal position. The venous endothelium stretched beyond the sinus endothelium. The orientation of the collagen fibers changed at the level of the venous openings, with the luminal diameter becoming narrow and oval-shaped. The major finding was the organization of the smooth-muscle cells at the end of each cortical vein. At this site and particularly in the frontoparietal region, the vessel resembled a myoendothelial “sphincter.” The authors hypothesize that this organization is involved in cerebral venous system regulation. Conclusions The point of convergence between the cortical veins and the SSS is a key area. The authors also hypothesize that the myoendothelial junction acts as a smooth sphincter and that it plays a role in cerebral venous hemodynamics and pathological conditions.

Flow Dynamics of Cerebral Bridging Veins Entering Superior Sagittal Sinus by Color-Coded Duplex Sonography

2017 ◽  
Vol 7 (4) ◽  
pp. 862-866 ◽  
Author(s):  
Yongchao Chen ◽  
Renpin Zhang ◽  
Juan Lian ◽  
Fucheng Luo ◽  
Hui Han ◽  
...  
Keyword(s):  
Superior Sagittal Sinus ◽  
Duplex Sonography ◽  
Flow Dynamics ◽  
Sagittal Sinus ◽  
Bridging Veins ◽  
Color Coded Duplex Sonography

Occlusion of the pig superior sagittal sinus, bridging and cortical veins: multistep evolution of sinus-vein thrombosis

1992 ◽  
Vol 77 (1) ◽  
pp. 127-133 ◽  
Author(s):  
Georg Fries ◽  
Thomas Wallenfang ◽  
Johannes Hennen ◽  
Markus Velthaus ◽  
Axel Heimann ◽  
...  
Keyword(s):  
Water Content ◽  
Fibrin Glue ◽  
Superior Sagittal Sinus ◽  
Collateral Flow ◽  
Content Type ◽  
Vein Thrombosis ◽  
Sagittal Sinus ◽  
Multistep Process ◽  
Bridging Veins ◽  
Fine Print

✓ Cerebral sinus-vein thrombosis may lead to severe hemodynamic changes, elevated intracranial pressure (ICP), and brain edema. It is supposed that progression of the thrombus from the sinus into bridging and cortical veins plays a key role in the development of these pathophysiological changes, but this hypothesis lacks experimental proof. The aim of this study, using a novel animal model of sinus-vein thrombosis, was to evaluate the effects of a standardized occlusion of the superior sagittal sinus and its bridging and cortical veins on hemodynamic alterations, on brain water content, and on ICP in domestic pigs. In 10 animals, the middle third of the superior sagittal sinus was occluded with a catheter-guided balloon. Five of these pigs received an additional injection of 1 ml fibrin glue into the superior sagittal sinus anterior to the inflated balloon, leading to an obstruction of bridging and cortical veins. In five control animals the balloon was inserted but not inflated. Five pigs underwent cerebral angiography. Four hours after occlusion, the brains were frozen in liquid nitrogen, and coronal slices were examined for Evans blue dye extravasation, regional water content, and histological changes. Occlusion of the superior sagittal sinus alone did not affect ICP or cerebral perfusion pressure (CPP). The additional injection of fibrin glue caused an obstruction of cortical and bridging veins as well as severe increases in mean (± standard deviation) ICP to 49.4 ± 14.3 mm Hg, compared with 8.3 ± 4.5 mm Hg in sham-treated controls and 7.1 ± 3.9 mm Hg in animals with occlusion of the superior sagittal sinus alone. There was also a steep fall in the mean CPP to 34.2 ± 19.6 mm Hg compared with 96.4 ± 13.8 mm Hg in the control group. White-matter water content anterior to the occlusion site was elevated to 81.9 ± 3.7 gm/100 gm frozen weight in the fibrin group as compared to 70.7 ± 2.2 gm/100 gm in controls. Posterior to the occlusion site, water content did not differ among the three groups. Angiography demonstrated collateral flow via cortical and bridging veins in animals with occlusion of the superior sagittal sinus alone. Additional fibrin glue obstructed these collateral vessels. The data suggest a multistep process of pathophysiological alterations in patients with sinus-vein thrombosis and may explain why these patients present with a wide variety of symptoms: minor neurological deficits or headache might indicate thrombosis of the superior sagittal sinus and/or its bridging veins. In subjects with severe symptoms, coma, and increased ICP there may be an additional involvement of tributary cortical veins. The proposed multistep process offers the rationale for heparin treatment of sinus-vein thrombosis even in patients with minor symptoms.

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