Abstract: Compare the effect of surgical treatment and conservative treatment of cat idiopathic chylothorax under thoracoscopy. Cats with idiopathic chylothorax are treated in two ways. Conservative treatment is to place a thoracic catheter for daily suction of pleural effusion, while taking rutin drugs and adopting a low-fat diet. Surgical treatment adopts thoracic duct ligation and pericardectomy under thoracoscopy. The recovery degree of the cat can be judged by checking the physical condition of the cat, blood examination, cytology examination, and imaging examination. Seven days after conservative treatment, the body weight of the cat was still decreasing, the production of chylo fluid did not decrease, and the cytological examination revealed that the neutrophil nucleus shifted to the left, indicating that the cat’s pleural effusion condition has not been significantly improved. The fluid was significantly reduced, the weight gradually recovered, and the postoperative recovery was good without infection. Conservative medical treatment is not satisfactory in the efficacy of this case, while thoracoscopic thoracic duct ligation and pericardectomy are safe and effective procedures for the treatment of cat idiopathic chylothorax, which can effectively reduce pain, speed up recovery, and reduce Postoperative complications, etc.

Key words: cat, idiopathic chylothorax, conservative treatment, chylo, thoracoscopic surgery