Where do the dural sinuses drain?

The dural venous sinuses lie between the periosteal and meningeal layers of the dura mater. They are best thought of as collecting pools of blood, which drain the central nervous system, the face, and the scalp. All the dural venous sinuses ultimately drain into the internal jugular vein.

What uncommon disease may result when there is a filling defect of the dural venous sinuses?

Cerebral venous sinus thrombosis (CVST) is an uncommon disease entity. In contrast-enhanced computed tomography (CT) or magnetic resonance venography (MRV) images of the brain, CVST usually manifests as a filling defect of the dural venous sinuses.

What are dural sinuses filled with?

The paranasal sinuses (e.g., sphenoid sinus) are spaces that are continuous with the nasal cavity and are embedded in the bones of the skull. They contain air and have a mucous lining that is continuous into the nasal mucosa. Thus, the dural venous sinuses contain blood and the paranasal sinus contain air.

What does the sigmoid sinus drain into?

The sigmoid sinus courses along the floor of the posterior cranial fossa to enter the jugular foramen. It drains into the jugular bulb via which it connects with the internal jugular vein. These tributaries include the mastoid and (posterior) condylar emissary veins.

What are the 11 dural venous sinuses?

There are seven paired (transverse, cavernous, greater & lesser petrosal, sphenoparietal, sigmoid and basilar) and five unpaired (superior & inferior sagittal, straight, occipital and intercavernous) dural sinuses.

Which dural sinuses are responsible for draining the cerebellum?

The cerebellum is drained by the superior and inferior cerebellar veins and their tributaries. From the upper surface of the cerebellum, blood is drained into the straight, transverse, and superior petrosal venous sinuses.

What is cerebral venous sinus thrombosis?

Cerebral venous sinus thrombosis (CVST) occurs when a blood clot forms in the brain’s venous sinuses. This prevents blood from draining out of the brain. As a result, blood cells may break and leak blood into the brain tissues, forming a hemorrhage.

What are dural folds?

The dura separates into two layers at dural reflections (also known as dural folds), places where the inner dural layer is reflected as sheet-like protrusions into the cranial cavity.

What does dural venous sinuses are patent?

The dural venous sinuses (DVSs) are endothelial-lined sinuses, which lie between the two layers of dura (meningeal and endosteal layers). They collect venous blood from the brain, meninges, and calvaria and deliver it to the internal jugular veins at the skull base.

What drains into the straight sinus?

The straight sinus, also known as tentorial sinus or the sinus rectus, is an area within the skull beneath the brain that receives venous blood. The straight sinus receives blood from the superior cerebellar veins and inferior sagittal sinus and drains into the confluence of sinuses.

What is the dural sinus?

Dural venous sinuses are a group of sinuses or blood channels that drains venous blood circulating from the cranial cavity. It collectively returns deoxygenated blood from the head to the heart to maintain systemic circulation.

Where does the sinus drainage in the ear come from?

This occurs despite the absence of a direct connection between the sinuses and the ear. The Eustachian tube, which is a narrow passage connecting the ear and throat, drains the middle ear into the part of the throat that is behind the nose called the nasopharynx.

Where does the drainage from the dural venous sinuses go?

Instead, they drain to the dural sinuses, which subsequently drain to the internal jugular vein. Generally, the walls of these drainage pathways are formed by visceral periosteum and dural reflection, both lined with endothelium.

What happens if your sinus drainage is not treated?

Unaddressed sinus drainage If not addressed properly sinus drainage could lead to the following: 1 Bad breath 2 Throat infection or soreness 3 Otitis (inflammation of the ear) 4 Chronic sinus drainage

How to relieve ear pressure from a sinus infection?

By relieving your sinus infection you can reduce ear pressure, pain and temporary hearing loss associated with the condition. The sinus-ear connection stems from the fact that your sinuses and ears are connected; therefore, clogged and congested sinuses also affect the ears.