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Forschungsdatenbank PMU-SQQUID

The efficacy of dexamethasone on reduction in the reoperation rate of chronic subdural hematoma - the DRESH study: straightforward study protocol for a randomized controlled trial
Emich, S; Richling, B; McCoy, MR; Al-Schameri, RA; Ling, F; Sun, LY; Wang, YB; Hitzl, W
TRIALS. 2014; 15 (6): 1-10.
Originalarbeiten (Zeitschrift)


Al-Schameri Abdul Rahman
Emich Stephan
Hitzl Wolfgang
McCoy Mark R.


We reviewed the anatomy and embryology of the bridging and emissary veins aiming to elucidate aspects related to the cranial dural arteriovenous fistulae. Data from relevant articles on the anatomy and embryology of the bridging and emissary veins were identified using one electronic database, supplemented by data from selected reference texts. Persisting fetal pial-arachnoidal veins correspond to the adult bridging veins. Relevant embryologic descriptions are based on the classic scheme of five divisions of the brain (telencephalon, diencephalon, mesencephalon, metencephalon, myelencephalon). Variation in their exact position and the number of bridging veins is the rule and certain locations, particularly that of the anterior cranial fossa and lower posterior cranial fossa are often neglected in prior descriptions. The distal segment of a bridging vein is part of the dural system and can be primarily involved in cranial dural arteriovenous lesions by constituting the actual site of the shunt. The veins in the lamina cribriformis exhibit a bridging-emissary vein pattern similar to the spinal configuration. The emissary veins connect the dural venous system with the extracranial venous system and are often involved in dural arteriovenous lesions. Cranial dural shunts may develop in three distinct areas of the cranial venous system: the dural sinuses and their interfaces with bridging veins and emissary veins. The exact site of the lesion may dictate the arterial feeders and original venous drainage pattern.

Useful keywords (using NLM MeSH Indexing)




Clinical Protocols



Dexamethasone/adverse effects

Double-Blind Method

Drug Administration Schedule



Glucocorticoids/adverse effects

Hematoma, Subdural, Chronic/diagnosis

Hematoma, Subdural, Chronic/drug therapy*

Hematoma, Subdural, Chronic/surgery*



Research Design*

Secondary Prevention

Time Factors

Treatment Outcome

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Subdural hematoma