What about dystocia in sows?

I. Prevention of dystocia in sows

(1) strengthen the feeding and management of sows

To ensure the full price and high quality of feed and appropriate nutrition level of pregnant sows, especially to meet the needs of vitamins and minerals closely related to reproductive function, and to flexibly control feed according to comprehensive factors such as pig size, parity and seasonal air temperature. to prevent overweight and thinness of pigs. Ensure that the environment, especially the production line, is quiet and the temperature and humidity are suitable. For pregnant sows to exercise properly, it is best to be fed in a traditional pig house one month before delivery and allow them to move freely. Take good care of the late pregnancy and sows, and monitor the delivery.

(2) High standards and strict selection of reserve pigs

The hindquarters are required to be round, the tail root is high, and the vulva is well developed. Adhere to the appropriate age of more than 8 months of age and weight above 110kg breeding, timely elimination of the elderly multiple parity sows.

(3) do a good job in epidemic prevention

Adhere to the viewpoint of systematic epidemic prevention, vaccinate all kinds of vaccines with high quality according to the immune procedure, disinfect, disinfect, disinfect rats and mosquitoes regularly, diagnose and treat various common diseases timely and effectively, and control the occurrence of mummies, stillbirths and malformed fetuses.

Treatment and treatment of dystocia in sows

When dystocia occurs, first drive the sow out of the limit pen, drive about 10min in the aisle of the delivery house, in order to adjust the fetal posture, and then drive the sow back to the pen to give birth, and then choose drugs or assisted labor if it is not effective.

First of all, check the status of the pelvis and birth canal of dystocia sows to eliminate the obstacles of piglets' delivery channel. If the rectum is full of dung balls to oppress the birth canal, you should first soften the dung balls with lukewarm mineral oil or soapy water and take them out. If the bladder accumulates urine and excessive filling pushes upward and protrudes into the birth canal, it should be repeatedly gently pressed to stimulate the bladder wall to induce its urination, or force the sow to stand up to promote its urination; if necessary, use a catheter to remove urine. If any piglet reaches the entrance of the bone poor cavity or has entered the birth canal, traction should be performed immediately when its size, posture, position and so on are felt. The specific methods are as follows:

(1) Drug-induced labor

After the birth canal is confirmed to be complete and unobstructed, drugs will be used to induce labor. Oxytocin or oxytocin is the drug of choice. It is recommended that 30-30min oxytocin be injected intramuscularly or subcutaneously every 20-50IU. In order to improve the efficacy of oxytocin, estrogen can be selectively used, that is, estradiol 10-20mg or other estrogen preparations are injected intramuscularly before the use of oxytocin.

(2) artificial midwifery

1. Matters needing attention in artificial midwifery

Generally find a worker with relatively small hands, cut the nails, remove the dirt on the edges of the nails and polish the edges of the nails, wash the palms, arms and the vulva of the sow with 0.1% potassium permanganate, apply soap or paraffin oil on the palms and arms, and slowly rotate the five fingers together in a cone into the birth canal of the sow, and the sow stops when it is hard to check the cause of dystocia. Midwifery pull must not be too hard, so as not to damage the birth canal of sows or cause prolapse of the birth canal.

2. Methods of artificial midwifery

2.1, unarmed pulling method: the arm of the midwife slowly extends into the birth canal of the sow to find out the fetal position of the piglet. when the piglet is giving birth, the four fingers are stuck in the two ears of the piglet and can also be pulled slowly with the thumb and middle finger scratching the eye socket of the piglet or tightening the intermandibular space of the piglet with the thumb and index finger. When the piglets are born in reverse, the thumb, index finger and middle finger can be used to hold the two hindlegs of the piglets and pull them out slowly. If the fetal position is not correct, you can first correct the fetal position of piglets, and then pull. If both ends are pulled into the birth canal at the same time, one can be pushed into the birth canal at the same time, and then midwifery according to the above method.

2.2, instrument midwifery method: generally use obstetrical hook and traction rope, because of the greater harm to piglets, and even cause death, while may damage the birth canal of sows, generally have clinical experience to operate. Obstetrical hooks can be temporarily made according to the degree of dystocia of sows, usually with iron wire. One end of the wire bends a small hook, about 0.5% in diameter and about 40 cm in length. During midwifery, the obstetrical hook was placed in the palm of the hand and pinched with the thumb, index finger and middle finger, and the hand was slowly rotated into the birth canal of the sow, and the obstetrical hook was hooked to the orbital or mandibular space of the piglet for traction with the thumb and index finger. One end of the obstetrical rope is tied with a looper, pinched with the thumb and index finger and extended into the birth canal, and then slowly pulled around the upper jaw or forelimb (positive) and hindlimb (inverted) of the piglets. During midwifery, the pulling should be carried out at the same time as the sow.

Nursing care of sows after midwifery: after midwifery, antibacterial and anti-inflammatory drugs were injected intramuscularly or in the uterus, and 0.1% potassium permanganate solution was washed with disposable vas deferens once a day for 3-5 days.

2.3.The method for the treatment of stillbirth dystocia: for a very small number of binary miscellaneous clinical symptoms and manifestations of sows that are close to or longer than the delivery period and continuous lochia in the vulva, use a vas deferens connection syringe to inject into the uterine cavity of the sow saline with a concentration of 1% 3% and a temperature of 36-38 ℃, until the salt water flows out from the vulva of the sow, and then combined with oxytocin. After 20 hours, the contents of the sow's uterus can be excreted. However, it must be noted that when the cervix of the sow is not opened, the pelvis is narrow and the birth canal is obstructed, oxytocin should not be injected; within 5 days after delivery, 3-4 branches of penicillin and streptomycin should be injected intramuscularly to prevent inflammation of the reproductive tract.