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Blood test and test, is a routine work of a scale pig farm. At present, most pig farm veterinarians are in terms of knowledge, still blood collection in the use of ear vein blood. The method of ear vein blood, there is the following disadvantages:

(1) Time. From the ear vein, it takes more than 5 minutes, a large pig farm, and if the blood of 40 pigs is given, the blood collection is 4 hours.
(2) Easy to fail. Because the pig’s ear (especially small pigs), pigs are often shake often, so that the needles that have been inserted, often pumping with blood.
(3) Blood samples are unsanitary. Many times, in particular, in the case of small pigs, it is difficult to draw with disposable syringes. To this end, many veterinary staff have used the needle to pierce the ear veins, and they directly use the Xilin bottle in the ear, which is not met the blood samples.

It is because of the time when the ear venous blood is expensive. Many grassroots veterinary technicians are convenient for greed, and they often pay for their tasks. They often take only one pig blood, and then dilute into a few free inspection, resulting in test results Quasi-misdiagnosis, delay the trend of pig farm, bring serious economic losses to the pig farm.

The intravenous blood of the front cavity is some of some skiling methods commonly used in veterinarians. However, it is not a lot of veterinarians who can use the intravenous venous blood of the prostate. Due to the lack of information on this technology, many grassroots veterinologists often think that this is a complex technology that requires superior operation skills. In fact, as long as you master the operational essentials, through a short time speaking, each veterinarian can master this technology. General veterinarians can basically master this technology after an hour of explanation and demonstration.

Application of prostate vena cavalent, can save more than half of the time, and the blood sample is cleaned. General veterinarians blood in this method, each blood collection 20 sows and 40 meat pigs, less than 2 hours can complete the task.

Technical points in front vena cava

1. Select the appropriate syringe and needle. Senching is generally a one-time 5mlSyringe. Due to different sizes of pigs, the depth of the vena cava is different, and the needle that requires the use is not the same. The needle is too short, causing the front cavity; the needle is too long, it may pierce the front vein. According to the experience of my operation, there is a 16 # 50mm needle (this needle pig farm is not commonly used, but many needle manufacturers can be produced, can be found in the local veterinary pharmaceutical sales store); 30kg or more Pig, should choose 12 # 38mm needle; 10-30kg pig, optional 9 # 25mm (medical disposable syringe constitutive needle); 10kg less lactaria, should choose 9 # 20mm needle (otherwise included A specification of the needle).
2. Baoding of pigs. The male sow is guaranteed by Baoding Rope, requiring high as possible, so that the head and neck of the pig is 30 degrees from the horizontal angle, so that both the blood collection personnel look at the blood collection site, which can make the forekin venae protrude outward, venous blood Follow. Middle and big pigs above 20kg, from 1-2 breeders to take a pig (or Baoding rope), head is standing, biased toward the right; the pigs below 20kg can be grasped by 1-2 breeders. Insert, react relying on the column.

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Figure 2 sow blood collection

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Figure 3 Care pig fixation and blood collection

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In Figure 4, pig fixation and blood collection

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Figure 5 large pig fixation and blood collection
3. Find the neutral part. The front cavity of the pig is, the more shallow the head, but the worse, the more the chest is clung, but the deeper. Therefore, blood collection should be selected. If the part of the piglets, if the blood vessel is too small, it is difficult to tie, and it is difficult to extract blood, so the blood collection site of piglets should be slightly later. The blood vessels and male pigs in China are relatively large, they are too deep, and the needle is not enough, so it should be brought to before. According to my experience, the pigs below 20kg should be used to pick up the intersection of the two proimers and trachea, and the big pigs in the mamato and more than 20KG can choose the closest portion of the neck.

4. Neck and blood. Pig: Align the part described above, and use the needle vertically. Tensioning the syringe piston, if the needle is in the front cavity venous, it can be seen from the blood vessel source from the blood vessel source to extract the required blood volume. If the blood is pumped, the needle is not tied, and the needle can be up and down until the blood flow is seen in the syringe. Magong sow and medium pigs: Align the lower part, so that the needle is undergover of about 15 degrees in the direction of about 15 degrees, tighten the syringe piston, in which the blood flows can be seen. If there is no blood flow, it means that there is no tie, it may be deeper with a deeper in the forekin, and the hand can be used to distinguish the needle. If you still can’t get blood, you can slightly retire the needle, or sway the needle left until there is blood flow out. In fact, after the operation is skilled, there is no tie in the needle. You can feel it by hand, when the needle is tie, it can feel a slight “Bu”. Precautions for intravenous blood collection

The intravenous vena cava of pigs, although the difficulty is relatively large, but if the technical skill is skilled, blood collection is smooth, Saving time, the blood collection is more, so it is a common method for the blood of the pig. In order to master the intravenous venous blood collection technology, the author believes that there are some precautions:

(1) Use the appropriate syringe and needle. Due to different sizes of pigs, the depth of the front cavity is different, and the needles that require the use are different. If the needle is too short, the thorn is not in the foreclock; the needle is too long, it may pierce the entire foreclock, which is not blood. The needle type used in accordance with the size of the pig is as described above. The syringe for blood collection is preferably used, otherwise it must be kept drying.

(2) Do a good job, pay attention to safety. According to the size of the pig, different setup methods are used. After the Baoding, the pigs should be relatively stable, and they cannot be turned to sway or rear. The chest nest must fully expose to smooth blood intravenous blood. When you catch pigs, when you keep your pig, your action should not be rude, try to use touch action to make it quiet. Especially in the nasal roller sleeve or metal ring ring, it is necessary to avoid people being bitten or injured in the pig.
(3) Selection of the part of the needle. The porcine front cavity is worse than the head, but the worse, the more the chest is clung, but the deeper, so the blood collection should be selected. If the part of the small pig is too heavy, the blood vessel is too thin, it is difficult to tie, even if it is in the middle, it is difficult to extract blood, so the blood collection site of the pig should be slightly reached. The blood vessels in China and the breast pigs are relatively thick, deeper with a chest, and the needle is not enough, so it should be brought. According to the author’s experience, the pigs below 30 kg should pick two proimers and tracheothe intersections, and the mid-to-raw sows and 3,000 pigs above 30 kg can choose the minimum recess in neck. When you enter the needle, you must master a certain direction, angle, and depth, and adjust it in time. The blood vessel is pierced and will cause hematoma. To stop blood collection immediately, you must change the blood of another pig. It is important to pay attention to the blood of piglets, can’t be too fierce, too deep, to avoid injury and cardiac or heart.
(4) Handling the blood used. After the blood is taking blood, the blood in the syringe should be subjected to a container (test tube or penicillin empty bottle) in the storage of blood, and cannot be oscillated, and it is tilted. It is also possible to place a check after tilt in the syringe. To be checked, the summer is placed at room temperature for a while, and the winter is placed in the warm water in warm water in 25 ~ 37 ° C for a while, and the blood is analyzed. If you need to anticoagulate whole blood, it needs to be added in advance in the syringe or tube.Agent. Note that when penicillin is stored in blood or serum, penicillin is cleaned by disinfecting water, and then dried with water. When the blood sample is detected, the amount of ice cubes plus blood in the incubator will prevent blood deterioration and try to prevent dramatic oscillation during the test.

Current porcine disease becomes more complicated, many diseases are only difficult to make diagnostically with eye view or inherent experience. The traditional control model does not adapt to the prevention and treatment of pig disease in the new era, to carry out correct diagnostic analysis of pig disease, implement daily hypervisogenic monitoring and immune antibody monitoring, to provide technical support for the prevention, control, purification of the disease, must be serum Learning test.

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