Recently, winter is approaching and the temperature is getting lower and lower. The blood pressure of many hypertensive patients starts to rise with the decrease of temperature, and another wave of rumors begins to circulate.
How many of the following have you heard?
Hypertension is because there is too much blood, so the pressure rises. As long as some blood is released and the pressure is reduced, the blood pressure will naturally drop.
People with anemia will not get hypertension.
Bloodletting Therapy of Ancestral Old Traditional Chinese Medicine;
Blood donation can lower blood pressure.
This seems to be a reasonable [theory]. Why are they rumors?
Blood pressure will really drop if there is less blood.
There is a blood circulation system in our body, which is a set of closed circuits composed of the heart and blood vessels throughout our body. The blood vessels are filled with blood, which circulates in the blood vessels under the drive of the heart, delivering nutrition and oxygen to all parts of the body, and taking away waste and carbon dioxide from all parts of the body.
This circulatory system is a closed loop. The pressure on the blood vessel wall when blood flows is what we often call blood pressure.
When the amount of blood in the blood vessel increases, the pressure on the tube wall will inevitably increase, and vice versa.
This kind of situation is also very common in real life, for example, in TV plays, the common parturient gives birth to a child with massive hemorrhage, and doctors will find that the blood pressure is getting lower and lower when rescuing him. This is because of excessive hemorrhage, the blood volume in blood vessels becomes less, resulting in a drop in pressure. This kind of situation is called hypovolemic shock.
But can bloodletting really treat hypertension?
Bloodletting and lowering blood pressure are not easy.
As mentioned above, the total amount of blood in the body is indeed related to the level of blood pressure, and hypotension can be caused when the blood volume becomes small, but this does not mean that we can treat hypertension by bloodletting.
Because there are two prerequisites for bloodletting and blood pressure reduction, one is that the bloodletting speed should be fast enough; Second, the amount of bloodletting should be enough. Both prerequisites must be met to ensure that blood pressure is reduced.
Why fast?
Because our human body is a whole, when the human body loses blood, we will feel very thirsty and will take the initiative to drink water to supplement the lost blood volume. If it is not fast enough, we will release some blood and then drink water to eat to supplement it. In the long run, chronic anemia will be caused at most, leading to a decline in blood quality, but it will not cause a drop in blood pressure.
Why more?
Because although our blood vessel looks like a tube, But in fact it is alive and alive. When it feels the blood volume is decreasing, it will contract and make the lumen thinner to compensate for the loss of blood volume. Just like when a large bowl of water is filled, the bowl will automatically shrink to ensure full filling. Blood pressure will drop only when a large amount of lost blood exceeds its ability to contract.
If you want to reduce blood pressure, you have to bleed like cutting your wrists. Once you really bleed and put your blood pressure down, your life will soon disappear. If you want to survive at this time, you have to rescue it quickly.
In short, bloodletting is an unreliable, unreliable and difficult to grasp the degree of [antihypertensive therapy].
People with anemia also get high blood pressure.
First of all, anemia is not equal to low blood volume. Low blood volume refers to the total amount of blood, and anemia refers to the content of hemoglobin. It is like a bowl of sugar water, poured half a bowl, this is called total reduction, equivalent to low blood volume. Anemia, it is like I change a large bowl and add some clear water to it. Although the total amount is not less, the concentration of sugar water becomes lower.
So anemia has nothing to do with blood volume, For example, uremic patients cannot synthesize erythropoietin due to kidney damage, so almost every patient is in an anemic state when not treated, but also due to kidney damage, excess water in the body cannot be discharged, accumulating in blood vessels and increasing blood volume, so almost everyone suffers from hypertension.
Therefore, it is sheer nonsense that people with anemia should not have hypertension.
The correct [bloodletting] method
Bloodletting and blood pressure reduction are obviously unreliable, But one of the drugs we use in the process of lowering blood pressure is indeed lowering blood pressure by [bloodletting], That’s diuretics, Diuretics promote urination, It causes a large amount of water in the blood to be discharged from the kidney. It is equivalent to concentrating blood, To achieve the purpose of reducing blood volume, thus lowering blood pressure. In addition, some diuretics can also promote the excretion of sodium. We know that hypertension patients are most afraid of eating salt, with special emphasis on low sodium diet. This is because the blood sodium concentration is closely related to the increase of blood pressure. Diuretics promote the excretion of sodium and naturally can also provide better antihypertensive effect.
Other ways to control blood pressure
Although high blood volume is associated with high blood pressure, But it is not the only cause of high blood pressure, There are many factors causing hypertension, Such as the hardening of the blood vessel wall, the abnormal pumping function of the heart, the abnormal contraction of the height of the blood vessel wall, etc. Therefore, The use of antihypertensive drugs is also based on the different conditions of each patient, and different antihypertensive drugs are selected to [suit the remedy to the case]. For example, for patients with excessive sympathetic nerve response, antihypertensive drugs such as calcium antagonists are required, while for patients with weak sympathetic nerve response, it is useless to use the same drugs.
Different antihypertensive drugs are mainly aimed at different antihypertensive mechanisms. Therefore, in the process of long-term treatment of hypertension, do not change dressing or stop taking drugs at will, because drugs useful to others may not be useful to yourself, and it is better to fix doctors for a long time to follow up according to the measurement of blood pressure.
Hypertension is a common disease. Controlling blood pressure is a shortcut. Regular medication and regular examination are the only way to make blood pressure [long-term stability].
Poor blood pressure control will not only cause cardiovascular and cerebrovascular diseases and other diseases with high risk of death, It will also cause irreversible damage to kidneys and peripheral blood vessels. It poses a serious threat to our health, so we must not underestimate hypertension, pretend that it does not exist, and don’t think it is troublesome to take medicine and measure blood pressure every day, because if we don’t fix it, there will be more troublesome things waiting for you.