Veterinary Syringes injection methods commonly used by veterinarians and detailed explanations of their operations
Precautions for injection operation
1. Veterinary Syringes must be consistent, clean, unobstructed, and strictly disinfected.
2. Before injection, carefully check the drug name, use, dosage, properties, and whether it has expired, etc.; for example, when injecting more than two drugs at the same time, pay attention to whether there are contraindications for compatibility.
3. Intravenous liquid medicine, especially chloral hydrate, calcium chloride, hypertonic saline and other strongly irritating medicinal liquids, should be prevented from leaking outside the blood vessel.
4. When injecting a large amount of liquid medicine, the temperature should be as high as the body temperature. Veterinary Syringes or the air in the hose should be drained before injection.
5. During injection, if the needle breaks, it can be taken out with equipment; or under local anesthesia, the tissue can be cut and taken out.
1. Subcutaneous injection
Subcutaneous injection is to inject the drug into the subcutaneous tissue and absorb it through capillaries and lymphatic vessels. Generally, it takes 5-10 minutes to show the effect. All medicines, vaccines and vaccines that are easy to dissolve without strong irritation can be injected subcutaneously.
(1) Location: Choose a location that is rich in subcutaneous tissue and the skin is easy to move. Dogs and cats are on the side of the neck or back, and on the inside of the thigh.
(2) Method: After partial shearing and disinfection, use the thumb and middle finger of the left hand to pinch the skin, press the top of the index finger to form a triangular dimple, hold the Veterinary Syringes in the right hand, and quickly pierce the needle into the skin in the center of the dimple. When the skin is about 2 cm away, when the piston is twitched and no bleeding is seen, inject the liquid medicine. If the liquid medicine is too long, it should be injected in divided points. After the injection, pull out the needle and apply a local tincture of iodine.
2. Intradermal injection
It is mostly used for allergy test of bovine tuberculin and vaccination against sheep pox.
(1) Location: Choose the skin that is not easy to be rubbed, licked and bitten. Usually: horses and cows are in the upper 1/3 of the neck; pigs are in the roots of the ears; chickens are in the skin of the meat beard and other parts.
(2) Method: After shearing and disinfection, pinch the skin in your hand, hold the Veterinary Syringes in your right hand to make the needle penetrate the skin at a 30-degree angle with the skin, slowly inject the liquid medicine (generally no more than 0.5 ml), and push the medicine. I feel high resistance and small papules are formed locally after the injection. After the injection, lightly press the needle hole with an alcohol cotton ball to prevent the liquid from spilling.
Three, intramuscular injection
The intramuscular blood vessels are abundant, and the liquid absorption is faster after injection, second only to intravenous injection, and because there are fewer sensory nerves than subcutaneously, it causes less pain and is more clinically used.
(1) Location: Intramuscular injection can be carried out in any part with abundant muscles. Dogs and cats are mostly found in the waist muscles or thigh muscles on both sides of the spine.
(2) Method: After shearing and disinfection, pierce the needle into the muscle first, and then connect the Veterinary Syringes with the liquid medicine. After the piston is drawn to confirm that there is no blood return, inject the liquid medicine, or connect the needle first and perform one operation. Do not pierce the needle completely into the muscle when it is broken, so that it is difficult to remove it when it breaks.
Four, intravenous injection
The medicinal solution is injected directly into the intravenous tube, and it is quickly distributed to the whole body with the blood flow, and the effect is rapid, but the elimination is faster and the action time is short.
(1) Location: Animals such as cattle, horses, sheep, dogs and cats can be injected intravenously at the junction of the upper 1/3 and middle 1/3 of the jugular sulcus, because the muscles here are thinner and the veins are relatively shallow. Easy and convenient to inject.
In addition to the jugular vein, dogs can also be injected into the inner side of the wrist joint or the anterior inner side of the palm below the wrist joint, or the outer side of the tarsal joint, the upper tarsal joint, and the inner femoral vein.
(2) Method: After shearing and disinfection, press (or tighten with a rubber tube) on the proximal vein of the injection site with your fingers. After the vessel swells, choose a needle suitable for the thickness of the vein and pierce it at an angle of 15 to 45 degrees. In the blood vessel, after seeing the blood return, advance the needle about 1 cm along the direction of the blood vessel, slowly inject the liquid medicine, after the injection, press the needle hole with the alcohol cotton ball in the left hand, and quickly pull out the needle with the right hand. In order to prevent bleeding from the pinhole, continue to press the part for a while, and finally apply tincture of iodine.
When injecting a large amount of liquid medicine, the decomposition action is often used. Pierce the needle according to the above-mentioned intravenous injection method. When the blood flows out, quickly connect the infusion hose and the infusion bottle to drain the air. Lower the infusion bottle. When the blood returns, raise the infusion bottle and the medicine will flow into the vein.
The peritoneal absorption capacity is very strong. When the animal has heart failure and difficulty in intravenous injection, fluid can be supplemented through the peritoneal cavity. This method is mostly used for small and medium animals, but large animals can sometimes be used.
(1) Location: Dogs and cats are on the side of the white line of the abdomen 3 to 5 cm in front of the front edge of the lower abdomen pubic bone.
(2) Method: The dog can lie on the forequarters on the side and the hindquarters on the back. After piercing the needle vertically, fix the needle with the left hand, push the Veterinary Syringes piston with the right hand, inject the liquid medicine, and pierce correctly. There should be no gas when the Veterinary Syringes piston is withdrawn. And liquid. When a large amount of medicine is injected, the liquid medicine should be heated to the same temperature as the body temperature.
6. Intratracheal injection
(1) Location: On the midline of the upper 1/3 of the lower boundary on the ventral side of the neck, between the fourth to the fifth or the fifth to the sixth tracheal ring.
(2) Method: Use standing Baoding for large domestic animals, lying on the side for small domestic animals, fix the head, fully extend the neck, after partial shearing and disinfection, pierce the needle vertically with the right hand to a depth of 2 to 3 cm, after piercing into the trachea Then the resistance disappears and there is gas in the twitching piston, and then slowly inject the liquid medicine. After the injection is completed, apply iodine tincture locally.
The injected drug solution should be soluble and easily absorbed, otherwise it may cause pneumonia; the dose should not be too much; the temperature of the drug solution should be as high as the body temperature; in order to prevent or relieve cough, inject 2% procaine hydrochloride solution first 5 to 10 ml to reduce the sensitivity of the tracheal mucosa.
Seven, breast pool injection method
Method: Stand the animal in Baoding, squeeze the milk and disinfect the nipples. Hold the nipple in the left hand and pull it gently, and slowly insert the breast duct from the nipple orifice in the right hand. Connect the Veterinary Syringes and slowly inject the liquid medicine. After the injection, pull out the milk duct and gently pinch the nipple orifice to prevent the medicine from flowing out. Massage the breast with the other hand to disperse the liquid medicine.