High blood pressure is caused by too much blood. Can a little blood reduce blood pressure

Winter is a period of high incidence of cardiovascular diseases, especially for patients with hypertension. With the fluctuation of blood pressure, another wave of rumors began to spread.

How many of these have you heard?

The bloodletting therapy of traditional Chinese medicine.

High blood pressure is that there is too much blood. Release some blood, and the blood pressure will drop naturally.

Blood donation can lower blood pressure.

Anemia will not cause hypertension.

Why do we say that these seemingly reasonable "theories" are rumors? That's because it's too difficult to reduce blood pressure by bleeding!

The total amount of blood in the body is really related to the level of blood pressure. When the blood volume decreases, the blood pressure will be low, but this does not mean that we can treat hypertension by bleeding.

What kind of bleeding can lower blood pressure?

If you really want to reduce blood pressure by bleeding, you must meet two conditions:

The bleeding speed should be fast enough;

Enough blood should be bled.

Why should bleeding be fast?

Bleeding should be fast because our human body is a whole. When the human body loses blood, we will feel thirsty and take the initiative to drink water to supplement the lost blood volume.

If the bleeding speed is not fast enough, the blood released will be supplemented by drinking water and eating. In the long run, it will cause chronic anemia at most, and lead to the decline of blood quality, but it will not cause the decline of blood pressure.

Why should we bleed more?

The reason why we bleed more is that although our blood vessel looks like a tube, it is actually alive.

When it feels that the blood volume is decreasing, it will shrink to make the lumen thinner, to compensate for the loss of blood volume. Only when a large amount of blood loss exceeds its ability to contract, will blood pressure drop.

What will happen if we really bleed more and faster? Think about the scene of giving birth to a child and bleeding heavily on TV. It will kill people!

In short, bloodletting is an unreliable, unreliable and difficult to grasp the degree of "hypotensive treatment".

In the same way, blood donation cannot reduce blood pressure. According to the regulations, blood pressure is lower than the normal standard, and blood donation is not allowed.

People with anemia also have high blood pressure

Anemia does not mean that there is less blood. It mainly means that the quality of blood is poor. The popular saying is that blood is "thinner".

Thin blood does not mean less blood. These are two different concepts. Therefore, people with anemia may also have hypertension, the most typical of which is uremic patients.

In patients with uremia, due to kidney damage, the synthesis of erythropoietin is reduced, and almost every patient is in anemia state without treatment.

Also, due to kidney damage, the excess water in the body can not be drained, and accumulated in blood vessels to increase blood volume. Almost everyone has high blood pressure.

Reliable pressure control method

1. Diuretics: "bleed" not "bleed"

By promoting urination, diuretics make a large amount of water in the blood excrete from the kidney, which is equivalent to concentrating the blood, so as to reduce blood volume and thus reduce blood pressure.

In addition, some diuretics can also promote the excretion of sodium. We know that patients with hypertension are most afraid of eating too much salt, and special emphasis is placed on the control of dietary sodium salt. 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 provide better antihypertensive effect.

2. Other antihypertensive drugs

Although high blood volume is related to high blood pressure, it is not the only factor that causes high blood pressure. There are many factors that cause high blood pressure, such as hardening of blood vessel wall, abnormality of cardiac pumping function, abnormal contraction of blood vessel wall height, and so on.

Therefore, the use of antihypertensive drugs is also to select different antihypertensive drugs according to the different conditions of each patient.

Different antihypertensive drugs mainly aim at different antihypertensive mechanisms. Therefore, in the process of long-term treatment of hypertension, do not change or stop medication at will, because drugs that are useful to others may not work for you. It is better to follow up with a doctor for a long time according to the situation of blood pressure measurement.

Hypertension is a common disease. There is no shortcut to control blood pressure. Regular medication and regular examination are the only way to keep blood pressure "stable and stable".