You've probably heard of sinuses, right? You've probably had a little trouble with them. But did you know that inside our heads, or rather inside our skulls, there are several pairs of small air-filled cavities? That's what we medically call the paranasal sinuses. In everyday life, we simply call them 'sinuses.' Today, we're going to talk about one of these sinuses, the 'sphenoid sinus,' which is located in a special, deep place.
So, what does this sphenoid sinus do for us?
Simply put, your sphenoid sinuses are two air-filled cavities inside your skull. They are part of the sinus system that surrounds our nose. There are four types of paranasal sinuses:
- Frontal sinuses in the forehead
- The ethmoid sinuses, located between the eyes.
- Today we are talking about the sphenoid sinuses.
- And the maxillary sinuses in the cheekbones.
One of the main functions of the sphenoid sinus is to produce mucus . This mucus traps germs, dust particles, and allergens that enter the nose when we breathe and removes them from the nose. In other words, this mucus helps keep our nasal passages clean. In addition, this mucus also helps keep the lining of our nasal passages warm, moist, and healthy. In this way, the sphenoid sinus also helps moisten and cool the air we breathe and send it to the lungs.
Doctors are still researching other functions of the sphenoid sinus. Some of the other potential functions that have been identified so far include:
- Reducing the weight of the skull: Since the sphenoid sinus is a hollow cavity within a bone, it is believed to reduce the overall weight of the skull to some extent.
- Providing some protection in head accidents: Like a 'shock absorber' in a vehicle, if the head hits something, these air cavities may help to absorb some of the impact and prevent the skull from breaking.
- Helping to shape the sound of our voice: Just as sound spreads in an empty room, it is thought that these sinus cavities also contribute to the unique sound of our voice because sound echoes in these air-filled spaces.
Where is the Sphenoid Sinus located?
A very important question. Your sphenoid sinus is located inside the sphenoid bone . It's a butterfly-shaped bone. It's located between the bones of our face and the bones that are deeper in our skull. To be precise, the sphenoid sinus is located behind the top of the nasal cavity, close to the midline of our head. Of all the sinuses, your sphenoid sinus is the one that is located the furthest back, or deepest, in your skull.
The location of the sphenoid sinus is very important because there are several very important structures around it. For example:
- Internal carotid artery: This is the main blood vessel that supplies blood to our brain.
- Optic nerve: This nerve, which is essential for our vision, communicates between the eye and the brain.
- Pituitary gland: This is a small but very powerful gland that produces many hormones that regulate various functions in our body.
It's amazing how surgeons use this sinus!
Did you know that sometimes surgeons go through the sphenoid sinus to remove certain types of pituitary tumors? This surgery is called transsphenoidal surgery . What happens here is that the surgeon inserts a small camera (endoscope) through the nose, enters the sphenoid sinus, and then reaches the pituitary gland. One of the great advantages of this method is that these tumors can be removed without making any incisions in the face or scalp. Isn't it amazing?
What is the structure of the sphenoid sinus?
We have two sphenoid sinus cavities: the left sphenoid sinus and the right sphenoid sinus. These two are separated by a thin bony wall in the middle. However, this wall does not run exactly straight down the middle and divides the two sinuses equally. This means that your left and right sphenoid sinuses are not mirror images of each other. One may be larger than the other, or they may be shaped differently. Their size also varies with age, gender, and ethnicity.
The mucus produced by the sphenoid sinus drains into a space called the 'sphenoethmoidal recess' . This structure is located inside another structure called the 'superior meatus' . This is located at the back of our nose, just in front of the sphenoid sinus. Part of our ethmoid sinus also drains into this space.
What are the common diseases that affect the sphenoid sinus?
If germs or allergens enter and become trapped in our sphenoid sinuses, inflammation , or swelling of the tissue, can occur. This inflammation of the sphenoid sinuses is called 'sphenoid sinusitis' . This swelling blocks the sinus passages, allowing germs to get trapped inside and causing an infection. Usually, when the sphenoid sinus becomes infected, other sinuses, such as the ethmoid and frontal sinuses, which are close to it, are also involved.
However, it is a bit rare for the sphenoid sinus to become infected alone. But it is not impossible. Most of the time, sphenoid sinus infections are caused by bacteria . Very rarely, infections can also be caused by fungi. Bacterial infections of the sphenoid sinus caused by bacteria can be dangerous if left untreated. Because, as we have already discussed, this sinus is located very close to our brain and optic nerves.
Important: If an infection in the sphenoid sinus is not treated properly, it can spread and cause serious conditions such as:
* Brain abscess
* Damaged cranial nerves
* Meningitis - This is an infection of the membranes surrounding the brain and spinal cord.
Apart from this, benign, precancerous, and cancerous tumors can also develop in the sphenoid sinus. However, these are also very rare.
What are the signs that something is wrong?
Because the sphenoid sinus is located deep in our skull, it may not show the symptoms of a common sinus infection, such as nasal congestion and runny nose . The following are the most common symptoms of a sphenoid sinus infection, inflammation, or tumor:
- Seeing two things at once (Diplopia)
- Facial pain or numbness (the area of pain varies depending on the cranial nerve affected)
- Headache: This is the most common symptom. Sometimes it can be a sharp pain at the top of the head, in the back, or around the eyes.
- Sensitivity to light, meaning the eyes feel uncomfortable looking at light (Photophobia)
- Decreased or complete loss of vision
If you have one or more of these symptoms, it is very important to seek medical advice immediately.
How do we keep the sphenoid sinus healthy?
The same steps we usually take to protect ourselves from colds and allergies also help protect the sphenoid sinus.
- Things like getting enough sleep, exercising regularly, and eating a nutritious diet can reduce the risk of developing diseases.
- Washing your hands well and staying away from people who are sick also helps.
If you feel like your sphenoid sinuses are blocked, there are a few things you can do yourself to clear them:
- Nasal irrigation: Rinsing the inside of the nose with something like saline water can help clear out any blockages.
- Using a humidifier: This adds moisture to the air, helping to heal dry, sore tissues.
- Taking NSAIDs: For example, ibuprofen. These can reduce inflammation. However, it is best to take them under medical advice.
- Using a nasal steroid spray, such as fluticasone , can help reduce swelling and help drain mucus from your sinuses. This should only be used if your doctor recommends it.
Because the sphenoid sinus is located close to important structures, it is important to see a doctor immediately if you suspect you have symptoms of sphenoid sinusitis. Your doctor may need to drain the fluid from your sphenoid sinus to prevent the infection from spreading.
Although most sinus infections clear up on their own within a few days, if there is no improvement after two weeks, you should definitely see a doctor.
The most important message to take home
Your sphenoid sinus, along with the other paranasal sinuses, is part of your body's natural drainage system that keeps germs out of your nose and protects you from illness. However, infections can occur. Infections, especially in the sphenoid sinus, can spread and cause serious problems if not treated properly.
Therefore, it is very important to take all possible steps to avoid getting sick. If you have a sinus infection that lasts more than two weeks, be sure to see a doctor. Remember, your health is very important to you!
` Sphenoid sinus, sinus infections, headache, nasal congestion, fatigue, brain infections, blurred vision
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