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.
Unlike veins, these sinuses possess no muscular coat. Their lining is endothelium, a layer of cells like that which forms the surface of the innermost coat of the veins. The sinuses receive blood from the veins of the brain and connect directly or ultimately with the internal jugular vein.
The dural venous sinuses are spaces between the endosteal and meningeal layers of the dura. They contain venous blood that originates for the most part from the brain or cranial cavity. The sinuses contain an endothelial lining that is continuous into the veins that are connected to them.
The veins of the central nervous system drain deoxygenated blood from the cerebrum, cerebellum, brainstem and spinal cord. After emptying into the dural venous sinuses, most cerebral venous blood flows into the internal jugular veins before it is returned to the heart.
The straight sinus itself receives drainage from the inferior sagittal sinus, which courses in the falx cerebri. The inferior margin of the superior sagittal sinus divides into a right and left transverse sinus in the tentorium cerebelli, which is again made up of dura mater.
Patent = Open: In the context of you sinus ct - patent means that your sinuses are open and unobstructed (thats normal). In regards to your symptoms, you should have a discussion with your ENT doctor regarding why you are having difficulty with nasal breathing and nasal congestion.
The sinuses lighten the skull or improve our voices, but their main function is to produce a mucus that moisturizes the inside of the nose. This mucus layer protects the nose from pollutants, micro-organisms, dust and dirt.
The dura mater is composed of two layers: the periosteal/endosteal layer and the meningeal layer. The dural venous sinuses are between these two layers. The dura folds to form septa that create the falx cerebri, tentorium cerebelli, falx cerebelli, and diaphragma sellae.
A sinus is a hollow space in the body. There are many types of sinuses, but sinusitis affects the paranasal sinuses, the spaces behind the face that lead to the nasal cavity. The lining of these sinuses has the same composition as the lining of the nose. The sinuses produce a slimy secretion called mucus.
The largest sinus cavities are about an inch across. Others are much smaller. Your cheekbones hold your maxillary sinuses (the largest). The low-center of your forehead is where your frontal sinuses are located.
The confluence of sinuses (torcular herophili, or torcula) is the connecting point of the superior sagittal sinus, straight sinus, and occipital sinus. It is found deep to the occipital protuberance of the skull. Blood arriving at this point then proceeds to drain into the left and right transverse sinuses.
The sigmoid sinus is a paired intracranial venous channel. 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?.
The pia mater is located underneath the sub-arachnoid space. It is very thin, and tightly adhered to the surface of the brain and spinal cord. It is the only covering to follow the contours of the brain (the gyri and fissures).
Unlike the dura mater, which receives a rich vascular supply from numerous arteries, the arachnoid mater and the deeper pia mater are generally non-vascular.
Cerebrospinal Fluid (CSF) A clear colorless liquid formed in the VENTRICLES of the BRAIN by SECREATION from the CHOROID PLEXUS. Supplies NUTRIENTS to nervous tissue. Removes METABOLIC waste. Produces a mechanical BARRIER to CUSHION the brain.
The superior sagittal sinus receives the superior cerebral veins, veins from the diploë and dura mater, and, near the posterior extremity of the sagittal suture, veins from the pericranium, which pass through the parietal foramina.
Depending on the underlying cause, medical therapies may include:
- Intranasal corticosteroids. Intranasal corticosteroids reduce inflammation in the nasal passages.
- Oral corticosteroids. Oral corticosteroids are pill medications that work like intranasal steroids.
- Decongestants.
- Saline irrigation.
- Antibiotics.
- Immunotherapy.
Also in rare cases, sinus infections in the rear center of one's head can spread into the brain. This can lead to life-threatening conditions like meningitis or brain abscess, Dr. Sindwani says. “Before antibiotics, people would die from sinusitis,” he says.
Once there, the infection can lead to swelling of the brain, seizures, altered mental state, and vomiting. So, yes, an sinus infection can (rarely) go to your brain, but here's the thing: It almost never comes out of nowhere, and it always causes symptoms—like an extremely severe headache.
One of the most common symptoms of chronic sinusitis is brain fog. Essentially, brain fog is a condition that affects your brain and leads to memory problems and the inability to focus and think as you normally would.
Home Treatments
- Use a humidifier or vaporizer.
- Take long showers or breathe in steam from a pot of warm (but not too hot) water.
- Drink lots of fluids.
- Use a nasal saline spray.
- Try a Neti pot, nasal irrigator, or bulb syringe.
- Place a warm, wet towel on your face.
- Prop yourself up.
- Avoid chlorinated pools.
Ethmoid sinusitis is the inflammation of a specific group of sinuses — the ethmoid sinuses — which sit between the nose and eyes. The ethmoid sinuses are hollow spaces in the bones around the nose. They have a lining of mucus to help prevent the nose from drying out.
Sinuses are air-filled sacs (empty spaces) on either side of the nasal cavity that filter and clean the air breathed through the nose and lighten the bones of the skull. There are four paired sinuses in the head. The most posterior (farthest toward the back of the head) of these is the sphenoid sinus.
Sinus drainage is a natural process, so a person cannot prevent it. The sinuses drain down the back of the throat and into the stomach. Each time a person swallows, they are swallowing some mucus. Symptoms occur when there is an excessive amount of mucus, and the mucus is unusually thick.
Cavernous sinus thrombosis is usually caused by a bacterial infection that spreads from another area of the face or skull. Many cases are the result of an infection of staphylococcal (staph) bacteria, which can cause: sinusitis – an infection of the small cavities behind the cheekbones and forehead.
