Subcutaneous injection:

Inject into subcutaneous fat layer. For example: insulin injection for diabetics; Thrombotic drug injection.

Inject the liquid medicine into the loose tissue between skin and muscle, and the injection site is generally selected at the inner thigh and behind the ear root. When injecting, disinfect the injection site first, lift the skin with the thumb, forefinger and middle finger of the left hand to form a triangular fold, and the right hand will obliquely pierce the needle of the syringe under the skin in the center of the fold, making an angle of 45 degrees with the skin, then release the left hand to push the syringe and inject the liquid medicine.

Intramuscular injection:

Inject directly into the muscle. Examples include vaccines, hormones and antibiotics.

Intravenous injection:

Inject the liquid directly into the blood vessel. ? Don't do it yourself unless you are qualified for intravenous injection.

It is a treatment technology that directly injects liquid medicine into blood vessels to make the liquid medicine take effect quickly. Mainly used to rescue critically ill pigs, generally behind the ear and the great auricular vein.

First, rub the great vein behind the ear with alcohol cotton ball to make the vein swell; The assistant presses the vein at the root of the ear with his finger to dilate the blood vessels, and the syringe grabs the pig's ear with his left hand.

The right hand pricks the needle into the blood vessel at an angle of 18 degrees to 15 degrees; Relax the pressure at the root of the ear. Fix the needle in the left hand of the syringe, push the piston with the thumb of the right hand, and slowly inject the liquid medicine. Then the alcohol cotton ball presses the pinhole and pulls out the needle quickly to avoid hematoma.