After hearing this, the patient seemed to understand a little bit, but also seemed to not quite understand. A conflicted expression flashed across his face.
This situation once again tests the extent to which a doctor can understand the patient's brain.
"I think what confuses you is where exactly this place is located. After saying so much, it's hard to imagine it without an actual reference." Xie Wanying said.
Lin Jiayin nodded: "Yes. Doctor Xie, where is it? The bottom you mentioned is the bottom of the brain?"
"It's the bottom, the bottom of the cup." Xie Wanying picked up a cup on the table and pointed to the bottom to show the patient, emphasizing that the other party had heard it correctly.
The patient's expression then showed confusion again: "The bottom is at the bottom of my head, isn't it here at the chin?"
This is indeed what ordinary people understand. The bottom of the head is the chin.
The bottom of the skull is definitely not at the chin. The chin is the lower part of the mouth. We know that the mouth is followed by the throat, esophagus and trachea, which have nothing to do with the brain tissue.
"When we touch the back of the head, we find the occipital bone. The two temporal bones are in front of the occipital bone, and the temporal bones are connected to the sphenoid bone in the middle. The part of the mouth is the mandible, and the famous temporomandibular joint is connected to the temporal bones. You can see that the mandible is almost at the level of the ear. So, to be more precise, the sphenoid bone, the horizontal line of the sphenoid body in the middle does not reach the chin, and it needs to be lifted up to be closer to the nose. There is an important structure inside the sphenoid bone called the sphenoid sinus, which is connected to the nasal cavity."
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After a doctor used a specific and intuitive reference object for comparison and explanation, the non-medical personnel at the scene suddenly became enlightened. The layman's understanding that most of the horizontal line of the brain should reach the chin is wrong. In fact, if you touch the back of a person's head, you can know that the back of the head is tilted upward, which means that most of the brain tissue cannot reach the very bottom, that is, the cerebral hemispheres cannot reach it.
It is not too difficult to understand that the brain and nose are connected.
Because we have mentioned before that patients with brain trauma have cerebrospinal fluid rhinorrhoea. You think that cerebrospinal fluid usually does not flow out from other places but only from the nasal cavity, so there must be some mystery of the human body here. Now the answer has been revealed, it is due to the sphenoid sinus.
The sphenoid sinus is a cavity that connects to the nose. The sphenoid bone is where the brain is stored in the skull, so the sphenoid sinus is a natural window that connects the brain to the nose.
On the other hand, there is a natural opening like the sphenoid sinus that connects to the outside world through the nose. It is as if a natural hole has appeared in front of the doctor, forming a hole that can be drilled. Through this hole, the doctor can directly contact the brain which is tightly wrapped by the skull without opening the skull.
The opening of the sphenoid sinus is very small, and the doctor cannot operate with bare hands. It is located further into the nose and the doctor's eyes cannot see it. The doctor can only use special surgical instruments to drill into this small hole.
This surgical method sounds familiar. Yes, we can quickly associate it with other human body surgeries with similar surgical principles and methods, such as gastroscopy and colonoscopy. These surgeries all use natural openings in the human body to access the inside of the human body without using a scalpel to make an opening in the human body.
The instrument used in gastroscopic surgery is called a gastroscope, the instrument used in colonoscopy is called a colonoscope, and so on. The instrument used for surgery through the nose is called a nasal endoscope.
From what has been said above, we can know that nasal endoscopy can be used for nose surgery and brain surgery.
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