Operation essentials of rumen puncture and deflation in sheep

Let the sheep stand, one person holds the head and neck, and the other person follows the following steps:

(1) site: puncture can only be made in the left stomach, and local anesthesia is not needed. Draw a horizontal line from the external angle of ilium to the last rib, and the center of this line is the puncture position. Or start from the highest swelling point of the left stomach.

(2) Preparation: Before puncture, cut off the hair at the surgical site, apply iodine, make a cross-shaped incision on the skin with a knife, and then puncture with a trocar. If the tip of the trocar is very sharp, there is no need to cut the skin.

(3) Direction: Pierce the trocar (or large needle) into the elbow of the opposite side (right side) from the back to the top until the needle tip feels no resistance, that is, it penetrates the skin, loose connective tissue, abdominal yellow membrane, internal and external oblique muscle, transverse abdominis muscle fascia, peritoneal wall and rumen wall in turn.

(4) Bleeding: Pull out the trocar and let the gas escape. In the process of deflation, cover the outer hole of the intubation with your fingers from time to time, and deflate slowly and intermittently to avoid cerebral anemia caused by rapid deflation. It is difficult to deflate the foam gas, so 50 ~ 100 ml edible oil should be injected immediately to extinguish the foam, so that the gas can be easily discharged and deflated quickly. If the cannula is blocked by food, a probe or trocar must be inserted to clean the lumen.

(5) Prevention of recurrence: When abdominal distension disappears and gas has stopped to be discharged in large quantities, it is necessary to inject10 ~ 20ml of 5% clenbuterol solution or 30ml of 0.5% ~1%formalin solution into rumen cavity through intubation. Do not leave the casing for too long to avoid danger; At the same time, if the starter has been injected into the rumen cavity, it is not necessary to stay in the intubation.

(6) Pulling out the cannula: firstly, insert the trocar into the cannula, and then slowly pull out the trocar and the cannula together, so that the wound is easy to contract.

(7) Finally, apply iodine to the wound, then cover it with cotton gauze, and cover the wound with collodion. If there is no trocar or needle at that time, you can also puncture and deflate the left stomach with a knife. Rumen puncture is a simple and safe operation under the condition of observing aseptic rules and the above operation techniques, and treatment should not be delayed if necessary.