5th INTERNATIONAL CONGRESS OF MULTIDISCIPLINARY STUDIES, Ankara, Türkiye, 23 - 25 Eylül 2022, ss.237-238
The American Society of Anesthesiologists (ASA) scale is a physical status classification system that was developed for humans in 1941, however, it has been commonly used in veterinary medicine since 1978. Animals are assigned a category status from 1 (healthy) to 5 (moribund) or the letter 'E' (emergency) via this scale. It has been reported in previous studies couping with cats, dogs, rabbits, pigs, and horses that this scale predicts anesthetic morbidity and mortality in veterinary patients. There is disagreement about pre-anesthesia hematological and biochemical evaluation in patients with an ASA score of 1. Some authors stated that if the patient's ASA score is 1, hematological and biochemical evaluations should be minimal or even not required, while other authors suggested that evaluations may change ASA scores before the anesthesia and, therefore, the evaluation is important for ASA scoring. In a study conducted in 2008, it was reported that hematological and biochemical analyzes performed before anesthesia caused changes in ASA scores in dogs. Based on this information, in our study, we evaluated whether preoperative hematological and biochemical analyzes caused any changes in the ASA score in 98 cats with an ASA score of 1 presented to Atatürk University Veterinary Faculty Animal Hospital for castration. As a result of the hematological analysis, it was determined that 9 different hemogram values such as lymphocytes, neutrophils, and hemoglobin, of 44 animals were out of reference value. In biochemical analyzes, 7 different biochemical parameters were determined to be out of reference value among the parameters (ALT, AST, GGT, urea, etc.) in cats. All cats that were out of the reference value were referred to the department of internal medicine and detailed examinations were employed. As a result of detailed examination, it was determined that 8 of the cats had mild dehydration, 2 of them had anemia and 1 of them had thrombocytopenia, 1 animal had acute kidney failure and 1 animal had liver damage. It was determined that there was a change in ASA scoring in 5 cats (5.1%). In line with the information obtainedas a consequence of the study, we believe that hematological and biochemical analyzes should be performed before anesthesia to identify diseases that do not show any symptoms even if the ASA score is 1 in cats, similar to dogs, and to minimize the complications that may occur due to anesthesia.