Before the operation, the family said that the patient would not be allowed to undergo magnetic resonance examination, and the CT scan was unclear.

It is not impossible to measure the flow rate. After measuring the flow rate, it is actually more valuable for comparison with similar cases in the past. Otherwise, the doctor would not suggest that a magnetic resonance test can be performed before the operation.

Magnetic resonance is a precision instrument that is scanning and a computer that is calculating.

How do you visually test it?

Wei Shangquan observed that there was movement of substances in the cerebrospinal fluid on the screen and said, "You can observe the movement of the dots inside to calculate the flow rate."

It cannot be said that everything Student Wei said is wrong, it is a basic water flow calculation problem.

But if things are so simple, it is difficult to calculate how he, Senior Brother Huang, is anxious and sweating, and it is actually difficult to calculate.

"What's the problem?" Wei Shangquan asked.

Sun Yubo scratched his head and stared at the fellow villager who was keeping his eyes closed.

Shi Xu, who was standing beside him, said, "Can you move?"

Isn’t cerebrospinal fluid flowing all the time?

"It should be moving," said Tan Klin.

When Sun Yubo heard Teacher Tan say this, he didn't dare to shout that he would not move at all. How could he not move at all?

What's moving if it's not cerebrospinal fluid?

A doctor with a higher level of seniority and a surgeon is not a problem. Even if he is a specialist, he can also learn from other subjects. Shi Xuxian admitted: "The knowledge of neurosurgery has been handed over to the teacher long ago. Dr. Cao, why don't you say it, is it right?"

In medicine, the subjects are usually separated by mountains. Only when a medical student is a medical student, he will seriously learn some comprehensive knowledge. After graduation, he will be a common thing to forget about other subjects. In addition, internships, you cannot learn comprehensive specialist knowledge in each department. It depends on each medical student's own luck.

Cao Yong said: "The brain is as moving as other organs in the human body."

When a person lives, life lies in movement. Many organs and tissues in the body are moving, such as intestinal peristalsis and gallbladder contraction.

The heart is beating constantly. In clinical practice, it is like to say that the heart, brain, heart and brain seem to be connected, which can be reflected here. When the heart contracts, the brain tissue volume increases and expands the brain parenchymal movement towards the ventricle cranial plate, allowing the cerebrospinal fluid to flow out. When the heart is relaxed, the brain tissue volume retracts and the brain parenchymal movement direction is opposite, and the cerebrospinal fluid in the ventricle flows backwards.

Those who returned the neurosurgery knowledge to the teacher on the scene, after hearing Cao Yong's words, all of them stared: The brain is really good at moving, and it is not like the computer that everyone imagines that the computer is still moving, but the nerve lines inside are doing things, but like the heart shrinks and leaves.

"Don't you know?" Cao Yong asked them back.

The people from Puwai Er collectively fell silent.

In Cao Yong Daniu's opinion, this is really basic knowledge. You shouldn't forget it until you are completely different from a mountain.

The other medical students, Wei and others were even more scared to their faces. They were definitely confused and did not quickly recall this knowledge point.

Do you understand? Huang Zhilei's eyes glanced at the guys who dared to underestimate him.

This velocity measurement shows that it is not simply to measure the water flow, but to measure the peak flow velocity during the systolic and diastolic phases respectively. Because the heart contracts is a process, and the diastolic phase is also a process. The flow of cerebrospinal fluid is also a process, and it is impossible to be a uniform flow rate, so you can only measure the peak.
Chapter completed!