The rescue principle of sheep dystocia is to remove the fetus, save the ewe, and strive to achieve both mother and child; protect the fertility of the ewe and avoid infection and damage to the birth canal. Pay attention to strict disinfection during the midwifery process. When correcting the abnormal posture of the fetus, try to push the fetus back into the uterus, and the push should be done during the interval of the ewe's contraction. In the process of pulling out the fetus, you should use force as the ewe pushes, and keep the perineum well. When the birth canal is dry, in order to facilitate pulling out or pushing back the fetus, a large amount of lubricants such as soapy water or oil should be poured into the birth canal. If surgical midwifery or caesarean section is required, it should be performed as soon as possible. Preoperative examination must be thorough, the cause of dystocia must be correctly judged, and corresponding rescue measures must be taken decisively.

Common dystocia is divided into three categories: labor dystocia, birth canal dystocia, and fetal dystocia. The first two categories analyzed by the sheep B-ultrasound machine are caused by maternal abnormalities, such as: weak contractions and pushes of ewes, premature contractions and water rupture, uterine torsion, vaginal and vulvar stenosis, etc. The latter category is caused by fetal abnormalities through observation of sheep B-ultrasound images, such as: fetal oversize, fetal malformation and developmental abnormalities.

Sheep B-ultrasound training site

Introducing dystocia and midwifery methods for ewes through the auxiliary role of sheep B-ultrasound machine:

1. Weak contractions and pushes are caused by the small number of contractions of the uterus and abdominal wall during childbirth, short time and insufficient intensity, resulting in the inability to deliver the fetus. If the fetus cannot be touched by hand or instrument, oxytocin can be used to stimulate uterine contraction. Oxytocin is usually used, intramuscular or subcutaneous injection, 5-10 units each time, once every half an hour. If induced labor is ineffective, cesarean section is required.

2. When the fetus's head and neck are bent sideways or downward, the forelimbs are bent or the shoulders are forward during observation with B-ultrasound, the midwife will disinfect her hands, reach into the vagina and push the fetus completely into the uterine cavity, straighten the head, straighten the two forelimbs, and extend the nose, lips and two forelimbs into the soft birth canal, and then pull out the fetus.

3. If the fetus is sitting anteriorly, while pushing the fetus into the uterine cavity, hold the two hind hooves with your hands, straighten them into the soft birth canal, and then pull out the fetus.

4. If the Sheep B-ultrasound machine finds that the ewe has uterine torsion, vaginal stenosis, pelvic stenosis or deformation and other difficult labor, a cesarean section is required.

Before the operation, the hands, arms, instruments, ewe and site of the operator should be strictly disinfected as required. The surgical site should be selected between the anterior knee fold and the external mammary vein. Cut the skin and muscle layer, cut the peritoneum, and the incision should be 15-20 cm. After opening the abdominal cavity, lift the greater curvature of the uterus out of the abdominal wall incision, cut the uterine wall along the greater curvature, extract the amniotic fluid, and take out the fetus. Peel off the placenta around the uterine incision, and place 800,000 to 1 million units of penicillin in the uterine cavity. Then suture the uterine incision and put it into the abdominal cavity, and place 200,000 units of penicillin in the abdominal cavity. Finally, suture the peritoneum, muscle layer and skin. Pay attention to the care of the ewe after surgery to prevent infection.

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