For the safety of sterilized cats, biochemical examinations are necessary because the risk of anesthesia is relatively high. If the anesthetic cannot be metabolized, the cat will not wake up. You can also check whether the cat is allergic to the drug. The main item of the biochemical examination is to determine whether the cat's liver and kidney function are good. If the cat suffers from related diseases, problems will occur when the anesthetic is metabolized by the kidneys and liver. In severe cases, it can lead to the death of the cat. Therefore, a biochemical examination is performed before the cat is sterilized. It is relatively safe.