Intestinal obstruction is a disease caused by intestinal motor dysfunction and hyposecretion, intestinal contents can not be evacuated, resulting in intestinal dilatation, paralysis, and then obstruction. Intestinal obstruction in dairy cows is a kind of acute indirect abdominal pain caused by intestinal motility disorder, which causes partial or complete obstruction of one or more intestinal segments. The disease is one of the most common diseases in dairy cows. If feeding low-quality, digestible and nutritious forage for a long time, it is easy to weaken the intestinal function and cause intestinal obstruction, it should be prevented and cured. The following is to understand: the cause of intestinal obstruction in dairy cows, clinical symptoms and prevention of intestinal obstruction in dairy cows.
1. Etiological analysis
Clinically, dairy cows are more prone to intestinal incomplete obstruction, which is not only closely related to improper feeding and management, rough feed quality, malnutrition, lack of drinking water and other factors but also prone to occur during pregnancy, especially in late pregnancy, due to the rapid growth of the fetus, the abdominal pressure increased significantly, resulting in The gastrointestinal tract is obviously mechanically compressed, which weakens the peristaltic motility, slows down the backward transport of intestinal contents, absorbs the moisture contained in a large number of contents, dries them up, and stagnates in this area, thus causing the onset of the disease.
2. Clinical symptoms
In the early stage of onset, the diseased cattle showed obvious abdominal pain. When standing, they would kick and kick their hind limbs continuously, restlessly, and continuously kick their legs after lying on the ground. With the progress of the course of disease, usually after 4 days, abdominal pain symptoms will gradually ease or completely disappear, mental depression, refuse to walk, despite the desire to defecate but can not be smoothly discharged, sometimes peptone-like white mucus can be discharged, if the cecum occurs incomplete obstruction will produce yellowish-brown mucus.
Cattle breeders should stop feeding, slow or complete stop of rumen peristalsis, palpation of the rumen feel soft and have a sense of fluctuation. Usually, the body temperature does not rise significantly, the initial heartbeat is normal after five days will reach more than 100 times per minute, accompanied by obvious dehydration, eyeball depression. Pushing the right gown with a fist will produce a vibration sound. If it appears below the rib arch, duodenal obstruction usually occurs, or pyloric obstruction may occur. If it occurs around the pushed area, caecum, colon or ileum obstruction may occur.
3. Prevention and control measures
Western medicine therapy mainly adopts dredging diarrhea and administering a mixture of 5000-8000 mL water, 500-800 g mirabilite and 100 g rhubarb powder through a gastric tube. After 3-4 hours, 2-3 mg of Formylcholine or 30-50 mg of pilocarpine could be injected subcutaneously. Analgesic can be given by the intramuscular injection of 30 mL Analgin, intravenous injection of 1000-2000 mL 5% glucose saline, 50 mL 5% vitamin C injection and intramuscular injection of 20 mL 20% Analgin Caffeine once a day for 2-3 days.
Rectal examination of diseased cattle can crush the obstructive mass across the rectum if it is found that there is obstructive mass in the posterior lower part of the left kidney or under the abdominal wall of the right gown; if there is obstructive mass in the transverse part of the duodenum and it is composed of plant roots, it can be crushed directly, but forcible kneading is prohibited to prevent damage to the intestinal wall.
The diseased dairy cattle fell to the ground on the left side, pulled and fixed their forelimbs forward with ropes, pulled and fixed their hind limbs backward, and padded their heads with knitted bags to avoid facial skin being worn. Then dairy farmers should choose the right posterior rib arch muscular fossa for surgery, cut off its hair, then apply 5% iodine tincture for disinfection, then apply 75% alcohol for deionization, marking the length of the surgical site, usually with the last rib as the protrusion point, 5 cm away from the posterior rib, 6-10 cm below the transverse process of the lumbar spine as the starting point, vertical or along it.
In the direction of the rib arch, a 15 N18 cm mark was drawn with hemostatic forceps. Intravenous injection of 500 mL plus 0.9% saline or 5% glucose with 30 mL hemostatic sensitivity was used for hemostasis. The method of anesthesia combined with paralumbar nerve conduction anesthesia and invasive anesthesia was adopted, i.e. 10 mL 2% procaine hydrochloride was injected under the transverse process of the first, second and fourth lumbar vertebrae respectively, then 100 mL O.5% procaine hydrochloride was injected subcutaneously and muscularly at different points in the operation area.
After 5-15 mln, the diseased cattle could be anesthetized and then anesthetized. Fixed the wound towel well, when the needle needle needle is used on the skin of the operation department, the operation can be performed without pain. General anesthesia can last for 1.5-2 hours. The surgeon cut the abdominal wall in the right gown, examined the colon and duodenum outside the greater omentum to determine whether there was obstruction, and then went around the greater omentum hole to explore the obstruction mass.
If colonic obstruction occurs, it can be crushed directly in the abdominal cavity; if duodenal obstruction is caused by forage clumps, it can also be crushed directly; if duodenal obstruction is caused by relatively rough forage grass, it can not be forced to crush, it can be injected with the appropriate amount of oil at multiple points, so that it can be discharged by itself; The obstruction of the digestive tract is caused by the root of the plant. It is first pinched into a circle and pushed to the healthy intestinal segment. Then the intestinal tract is cut and removed.
To avoid infection, 8 million IU penicillin sodium can be injected into the abdominal cavity to suture the omentum, peritoneum, and muscle in turn. It should be noted that each layer should be washed with normal saline, and the sterilized gauze block is used to absorb water, and then 4 million IU penicillin sodium powder is sprayed. The skin layer is sutured by nodules, smeared with appropriate iodine glycerin, and also, the skin layer is sutured with iodine glycerin. The wound is fixed with dust-proof gauze to avoid infection. After the operation, the diseased cattle were intravenously injected with 500 mL O.9% saline and 1.6 million IU gentamicin every day. Eight hours after the operation, the diseased cattle can defecate smoothly, the abdominal circumference is smaller, and they can eat a small amount of hay. After 10 days, the skin suture can be removed.