A pre-anesthetic workup is critical before any surgery. This consists of a thorough physical by a veterinarian and often includes a blood test and urinalysis. In some cases, X-rays and an electrocardiogram are recommended.
These tests are necessary to make sure there aren't underlying medical problems such as kidney or liver disease, diabetes or chronic infection that would put the patient at greater risk during surgery. Also, the tests help the surgeon determine the best type of anesthetic procedure to use.