Li Fengmin is an expert in the field of public health from universities in the central region, and Professor Li Fengmin, who has worked in the Yunhe Municipal Health Commission and the School of Public Health of Yunhe University for many years, has a very helpless problem - lumbar intervertebral disc herniation.

In order to ensure the movement of joints and the stability of mutual connection, the nucleus pulposus has evolved to balance stress, the fibrous ring has evolved to absorb stress and limit spinal activity to maintain the connection of the spine, and there are cartilage plates to protect the vertebrae. The nucleus pulposus, annulus fibrous and cartilage plates are grouped together and are collectively referred to as the "lumbar disc" tissue.

As people age, the water content of the nucleus pulposus will begin to decline significantly. The water content of the nucleus pulposus will gradually decrease from about 90% in infancy to 70% or even lower in old age. With age, the depolymerization of proteoglycans in the nucleus pulposus increases, the water gradually decreases, and the collagen thickens and is gradually replaced by fibrocartilage, which also leads to the decrease in the volume of the nucleus pulposus, and the fibrous annulus cannot wrap the nucleus pulposus as tightly as it did in the younger years. The change of force will cause middle-aged and elderly people to be more likely to have lumbar intervertebral disc herniation than young people - the most intuitive change brought about by the reduction of nucleus pulposus is the "shrinkage" of height.

And Professor Li Fengmin was unlucky, because he basically accounted for all the high-risk factors of lumbar disc herniation. Growing older is something he can't stop, and the nature of his work requires him to stand or sit for long periods of time, and both of Professor Li's parents had symptoms similar to herniated discs in their lumbar spine, but because there was not enough medical care at the time, both elderly people passed away before they were diagnosed.

The most troublesome thing is that because he often needs to go to the countryside to investigate, Professor Li spent most of his time sitting on bumpy off-road vehicles when he was young, and when he was in his thirties, he had a car accident - he happened to be injured in the waist.

Increasing age, poor lifestyle habits, genetic factors, trauma. Under the combined effect of these four conditions, it would be a strange thing for Li Fengmin not to have a herniated lumbar disc.

The long-term insistence on going to the grassroots level to understand the real situation made Li Fengmin suffer from stomach problems. Twelve years ago, after a gastric perforation repair operation, he finally couldn't bear it. Under the persuasion of colleagues and leaders many times, Lao Li was transferred to an administrative post. Occasionally, he will be responsible for leading business and academic exchange activities between universities and institutions.

This time he came to Sanya, Li Fengmin received an invitation from Takeda Pharmaceutical. Lao Li, who has worked at the grassroots level all his life, can't understand how Takeda thought of inviting him, but the old man pondered for a long time, and always felt that it seemed good to go to Sanya to play. That's when I came to Sanya with my wife.

Lumbar disc herniation is a difficult problem to treat, but various physiotherapy can have some effect. Li Fengmin has been locked all his life, and it is absolutely impossible for him to enjoy the SPA services provided by the hotel at his own expense. As for letting Takeda pay - Li Fengmin himself could not accept it. If you have been honest all your life, you can't be almost seventy years old, but you will be killed by the sugar-coated shells of capitalism, right?

After dinner, Lao Li felt a little uncomfortable on his waist. In the morning at the branch venue, Lao Li was one of the main speakers, and in addition to standing up and giving a speech, Lao Li also had to sit and accept a long interview. After walking around uncomfortably for several laps, Li Fengmin decided to simply go for a swim - the lumbar spine is not easy to be stressed when soaked in water, and it can also relieve a little symptoms.

Swimming is really useful, in fact, swimming is an exercise that is very suitable for people with a herniated disc in the lumbar spine. Of course, don't butterfly swimming, butterfly swimming requires a person's waist strength very high, although there are not many people who can butterfly with a herniated lumbar disc, but this is indeed a taboo.

Li Fengmin was swimming slowly in the water when he suddenly felt a strong radiating pain in his left leg. It hurts all the way from the right thigh to near the heel. The severe pain made Li Fengmin unconsciously open his mouth and cry out in pain, but this pain was too inopportune - when he opened his mouth, he happened to be underwater.

When you open your mouth underwater, the water will naturally pour in. By the time Li Fengmin had resurfaced after controlling his perennial swimming experience in the Yangtze River, he had already choked on several mouthfuls of water.

Li Fengmin's movements attracted the attention of the lifeguards, and by the time the lifeguards ran all the way to the vicinity, Comrade Li had already swam to the shore and began to cough by the edge of the pool. He coughed and waved his hand at the lifeguard to signal that he was okay. "Ahem...... I'm fine, ahem, accidentally choked. ”

After making sure that the old man was okay, the lifeguard took the old man out of the water, sat him on the shore and rested, and left. Other medical experts who rushed to prepare for first aid surrounded Li Fengmin. Seriously, a 68-year-old man chokes on water, this kind of thing can be big or small. It may be fine with two coughs, or it can have very serious consequences. The doctors present are all doctors who have seen countless similar cases, and since they are all here, they must at least ask themselves to be at ease.

Although Sun Lien and Hu Jia were the first to arrive, the two of them did not go to the old man's side to inquire about the situation first. Sun Lien was still frowning and thinking about the meaning of "blood pressure is slowly decreasing". Hu Jia, on the other hand, felt that there were so many doctors who seemed to be at least director-level doctors, and he probably wouldn't be of much use.

Sun Lien couldn't figure out what this slow drop in blood pressure meant. The old man choked on water before, and his body may be in a state of stress. In this state, blood pressure and heart rate will rise. Now that they are all on the shore and surrounded by people, it should be regarded as the stress state is lifted. Blood pressure will definitely drop under this condition – but the recovery should be relatively quick. But I can't use the word "slow".

Is this a hint that there is something wrong with the old man's circulatory system? Sun Lien thought along this line of thought. There are three ways to control blood pressure in the human body, the first is baroreceptor regulation. In normal humans, baroreceptors are present in many arterial initiation segments, and these receptors transmit reflexes to the vascular motor center of the medulla oblongata, thus participating in the management of heartbeat and blood pressure.

The second is the volume pressure regulation mechanism, in which the human body adjusts the reabsorption efficiency of the glomeruli to achieve the effect of regulating blood volume. It regulates blood pressure through volume adjustment.

The third is the mechanism of fluid regulation, in which the body controls the dilation and contraction of blood vessels by secreting specific hormones.

A slow drop in blood pressure may indicate a problem with the receptors, or a problem with the kidneys, or even a problem with the old man's cardiovascular receptors.

Sun Lien made a difficulty, and any of these three problems could be a major illness. But to determine what is wrong with the old man, he has to be sent to a large tertiary hospital as soon as possible to find out.

Merely...... In the midst of this group of old experts, who are probably almost 600 years old together, snatching people out and sending them to the hospital? Sun Lien trembled, this is not a simple job.