An injection may be necessary:
-When a medicine does not come in a presentation that can be taken by mouth.
-When the person cannot swallow or is vomiting.
-In some emergencies, such as when a woman is bleeding or has an infection after childbirth or after an abortion.
It is important to give the injections correctly. They can be dangerous if put in the wrong place, in the wrong way, or without washing your hands or thoroughly cleaning the syringe and injection site.
The syringes are currently made of plastic, come packaged in an airtight silicone bag, are sterile and are used only once, in order to avoid the risk of infection among several patients. There are several sizes of syringes. From the smallest ones, with a capacity of one milliliter or cubic centimeter, which are used mainly for the administration of insulin to diabetic patients, to the largest ones, with a capacity of 60 milliliters. The most common are 3 and 5 milliliters.
The needles have a metal tube and a plastic adapter. Using this adapter, the needle is fixed to the lower end of the syringe. Like syringes, needles are also supplied individually packaged and sterile, and are used only once to avoid infection. Needles are manufactured in various sizes, which are used depending on the method of injection.
There are four forms of injections:
In intravenous injection, the needle is inserted through the skin into a vein. The liquid therefore enters the body system.
In intramuscular injection, the needle penetrates muscle tissue, depositing the liquid in that place. From there the body slowly absorbs it through capillary blood vessels. There are three types of intramuscular injection: intramuscular in the arm, intramuscular in the buttock, and intramuscular in the legs.
In subcutaneous injection the needle penetrates very little space below the skin, the injection angle with respect to the skin must be 90 or 45º, the liquid is deposited in that area, from where it is equally slowly absorbed by everything. the organism.
In intradermal injection, the needle penetrates only the skin (dermis) at an angle of 10º parallel to the longitudinal axis of the forearm. The injection must be slow and, if correct, a small papule will appear at the injection point that disappears spontaneously in 10 – 30 minutes. The biological product will be absorbed slowly and locally.