What is the cause of low blood calcium in perinatal cows?


Calcium is one of the essential elements of the body's life activities and plays an important role in the metabolism of animals. According to the literature, calcium in the blood and calcium bound to albumin account for about 43% to 47%, with citrate. Calcium combined with phosphate accounts for 5% to 10%, and calcium ions account for 48% to 52%. Among them, calcium ions are physiologically active substances. Therefore, it is ideal to directly measure calcium ions in the study of physiological functions and the diagnosis of certain diseases related to calcium metabolism.

The serum free calcium level of healthy animals maintains a dynamic balance to maintain the normal physiological activities of the animals. When the animals develop diseases such as disorder of calcium and phosphorus metabolism, parathyroid function disease, renal failure and other diseases, the serum free calcium concentration will change.

The new lactation period is a challenge for cows to maintain normal blood calcium levels. Milk (including colostrum) is rich in calcium ions, and cows must respond quickly to sudden calcium loss. The blood calcium ion concentration decreased significantly in the second or second litter of cattle, and the blood calcium ion concentration was low at 12 to 24 hours after calving.

The synthesis of childbirth, lactation and colostrum results in a large consumption of calcium ions, so the relative balance of blood calcium ions is broken. At the time of delivery, almost all cows develop varying degrees of hypocalcemia. When the plasma calcium concentration drops too low to maintain normal nerve and muscle contraction, birth or spar heat occurs.

All metabolic diseases are interrelated, one disease may lead to another disease, and milk production fever is the main cause of other metabolic diseases, such as stillbirth, ketoneemia, placental retention, mastitis and true stomach shift.


Hypokalemia cows have weakness in their limbs, lying down, obvious muscle tremors and prolonged lying time, difficulty swallowing, and difficulty breathing when respiratory muscles are involved.

In the early stage after calving, the main manifestation is that the vaginal discharge is light yellow and the egg pattern is thin and purulent, and the sick cow is discharged more when lying down. The rectal examination of the uterine horn is thickened and hardened, and the pressure is fluctuating, which is a symptom of endometrial inflammation. The sick cow's loss of appetite, decreased lactation, accompanied by shortness of breath, cough and increased nasal discharge, sometimes foamy liquid in the mouth, often standing unstable.

With the development of the disease, the sick cattle numbness, arrhythmia, pulse speed (80 ~ 100 times / min), showing typical symptoms of soft palate, artificial support can not stand up, urine is mostly yellow.

The cow's body temperature suddenly rises to 41 °C the next day after birth, gasping, lack of energy, loss of appetite, muscle relaxation, weakness, low head lobes, extremely sleepy, cows like to eat cereals, silage and anorexia or not grazing Kinds of feed and easy to sleep and other symptoms.


Production of sputum is often referred to as hypocalcemia, but the homeostasis of potassium in perinatal cows is also a complex problem, which is influenced by many factors, including concurrent metabolic diseases and drug treatment. Therefore, when the cow calf is found and has no obvious effect according to the treatment of hypocalcemia, it can be considered whether it is caused by hypokalemia.

Harold blood calcium detector, blood potassium detector, early help you find low blood calcium, hypokalemia, to protect the health of dairy cows.

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