The principle of salvage for sheep is to remove the fetus, save the ewes, and strive to achieve the mother and child; to protect the fertility of the ewes to avoid infection and injury of the birth canal. In the midwifery process, strict disinfection should be taken. When correcting the abnormal fetal position, the fetus should be pushed back into the uterus and push back in the intermittent period of eczema contraction. Pull out the fetus should be forced with the nuisance, to maintain the perineum. When the birth canal is dry, in order to facilitate pulling out or pushing back the fetus, a large amount of lubricant such as soap water or oil should be poured into the birth canal. If you need surgical midwifery or caesarean section, perform as soon as possible. Preoperative examination must be conducted carefully to correctly determine the cause of dystocia and take appropriate rescue measures.
Common dystocia fertility dystocia, birth canal dystocia and fetal dystocia three categories. The first two categories are caused by maternal abnormalities, such as eczema contractions and weaknesses, premature contractions and premature rupture of the uterus, hysteroscopies, vaginal and vulval stenosis; the latter are caused by fetal abnormalities such as excessive fetal growth. , fetal malformations and abnormal development.
Now the ewe's common dystocia and midwifery methods are described below:
The contraction and punishing responsibility are weak. It is due to the small number of contractions of the uterus and abdominal wall during the delivery of the ewes. The time and strength are not enough, so the fetus cannot produce. When it is determined that the cervix has been fully opened, the fetal orientation, the fetal position and the potential are normal, and there is no stenosis or other abnormality in the pelvis, if the fetus cannot be touched by hand or by the device, oxytocic drugs can be used to stimulate uterine contractions. Usually oxytocin is administered intramuscularly or subcutaneously, 5 to 10 IU per time, once every 30 minutes. If oxytocin is not effective, Caesarean section is required.
When the fetus scoliosis or bend, flexion of the forelimb or front of the shoulder, the confinement hand will be hand-sterilized, extended into the vagina to push the fetus completely into the uterine cavity, head straight, straighten the two forelimbs, so that The nose, lip, and two forelegs reach into the soft birth canal and then pull out the fetus.
If the fetus is placed on the front of the ischium, push the fetus into the uterine cavity while holding the two hind hooves by hand and straighten out into the soft birth canal, and then pull out the fetus.
If the ewes are found to be uterine torsion, vaginal stenosis, pelvic stenosis, or deformity, a caesarean section is required. Before cesarean section, the veterinarian should strictly disinfect the hands, arms, equipment, and ewes in the affected area. The surgical site should be selected between the anterior crease of the knee and the external jugular vein. Cut the skin and muscle layer, cut the peritoneum, incision to 15 to 20 cm is appropriate. After opening the abdominal cavity, lift the uterus body out of the abdominal wall incision, and cut the uterine wall along the big curve. Withdraw the amniotic fluid and remove the fetus. Peel the uterine incision around the placenta, and place 8 to 1 million international units of penicillin in the uterine cavity. The uterine incision was then sutured and placed in the abdominal cavity, and 200,000 international units of penicillin were placed in the abdominal cavity. Suture the peritoneum, muscle layer and skin. Should pay attention to the care of ewes after surgery to prevent infection.
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