Speaking of the psychological shadow of childhood, sick injections are definitely among the top few, especially spanking injections. I was smiling the first second, but crying the next second... is so painful!
Even though they are coming of age, many people feel their heart beat faster when they think of injections, and they feel terrified. They would rather take medicine or drip than injections. Some people even suffer from "injection phobia".
I believe that many people are afraid of injections, especially butt injections, but when they grow up, they seem to experience less spanking. Why do you want to get an injection in your butt?
1. Why did I spank my ass when I was a child, and my arm when I grew up?
First of all, we need to know that the injection on the buttocks belongs to intramuscular injection administration , compared with oral administration, the drug can quickly take effect after entering the body. The reason for choosing the buttocks is because the muscle tissue of the buttocks is the most loose, which is conducive to drug absorption . [1] Moreover, the area of the hip muscles is large and the blood vessels are less distributed. Strong1strong can avoid accidentally injuring the bones and blood vessels .
In addition, children often use hip injections because their arm muscles have not yet developed , and children like to struggle with injections, and injections in the hands are more difficult to control, so hip injections are safer.
Spanking needles are particularly painful because the area of tissue damage is larger .
Ordinary skin injections only need to penetrate 0.5 mm under the skin, while spanking needles need to penetrate 2.5 to 3 cm under the skin ,Into the muscle, this means that the wound area of the butt needle is larger. Although it looks inconspicuous to the naked eye, can see a difference of dozens of times if observed under a microscope.
In addition, unlike intravenous injection , when doctors give a spanking needle to a patient, the needle is pierced vertically down into the flesh, and some doctors even perform the same operation as "throwing a dart". In order to ensure the success of the drug delivery, the doctor will slowly push the syringe , so that the pain will last longer and naturally feel more painful.
2. In addition to the injection site, these will also affect the pain
1. Needle size
If you pay attention to observation, you will find that the end of the needle has a different color, which is actually for For medical staff to distinguish the thickness of the needle. Strong1strong The thicker the needle, the larger the wound will be , and the pain will naturally be stronger. Especially in intramuscular injection, the muscle cells of the human body are tightly arranged, and a needle of a certain thickness is required to be able to pierce. When the muscle fiber is pierced by the needle, it will cause a strong pain.
2. The irritation of the drug itself
There are some drugs that can stimulate the vascular mucosa or muscle tissue and cause a strong pain. Some drugs with high osmotic pressure, vasoconstrictors and some chemotherapy drugs, etc. Will cause more intense pain, such as paclitaxel, penicillin and so on.
3. Will the meat stay in the pinhole during injection?
When some people get an injection, they see such a thick needle tube and are afraid that they will leave their flesh inside when the needle is pulled out.In fact, this kind of thing is completely unnecessary.
Ordinary intramuscular or intravenous needles will not have this situation, because the subcutaneous and intramuscular injection sites are solid, and the pressure difference produced is not as large as blood injection, so it will not Get the meat into the needle.
But there is really a kind of needle that can keep the meat in the needle, that is, the biopsy needle specially made for grabbing tissues. It is so thick:
Picture source network
For organ and tumor tissue, cell sampling, it is subdivided into bone piercing needles, aspiration needles and other categories. [2] The needle of needle is very thick , there is negative pressure in the needle, after penetrating the tissue, manually apply a certain pressure to increase the pressure difference between the inside of the needle and the tissue in order to cut the tissue. After the tissue is cut, it will be taken out of the body with the needle, and then tested .
From childhood to childhood, no one can stay ill. If you are ill, you will naturally have to take medicine and injections. Especially when you are young, you can't get rid of the butt injection when you have a cold or fever. Although it is for the treatment of diseases, we always have such a trace of fear of injections, even after we grow up, we are still afraid. In fact, there is a reason behind the pain of injection. After read it, will you have less pain the next time you have an injection?
Reference materials:
[1] Why does spanking hurt so much? Why do injections usually hit the butt? Is it because of the meat? . Yipin Health. 2020-10-30
[2] Popular Science | Will the meat stay in the needle during injection? .Zhongda Medical Science.2019-05-12
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