Martin-Jurado Olga, Simova-Curd Stefka, Bettschart-Wolfensberger Regula, Hatt Jean-Michel
Clinic for Zoo Animals, Exotic Pets, and Wildlife, Vetsuisse Faculty, Winterthurerstr 260, 8057, University of Zurich, Zurich, Switzerland.
J Avian Med Surg. 2011 Jun;25(2):132-5. doi: 10.1647/2010-001.1.
Red kites (Milvus milvus) are birds of prey known to feign death in the presence of humans. An adult wild red kite was anesthetized with isoflurane for coelioscopy. During surgery, heart rate and respiratory rate ranged from 240 to 260 beats per minute and from 16 to 28 breaths rates per minute, respectively. Pupil and corneal reflexes remained present, and body temperature was maintained at 40.4 degrees C (104.7 degrees F). Suppression ratio was 0 during the anesthetic episode. The bispectral index was 44 immediately after intubation, ranged from 44 to 57 during maintenance of anesthesia, and was 59 at the moment of extubation. The index increased to 85 while the kite remained immobile, which was suggestive of feigning death in sternal recumbency. Once the bird was perched upright, it immediately kept the upright position, which confirmed the correspondence of the bispectral index value (85) with a fully conscious patient. Although behavioral or cardiorespiratory variables remained unchanged, the degree of hypnosis was indicated by the bispectral index, which anticipated a possible sudden awakening episode of this bird.
赤鸢（Milvus milvus）是一种猛禽，已知在人类面前会装死。一只成年野生赤鸢用异氟烷进行麻醉以进行腹腔镜检查。手术过程中，心率和呼吸频率分别为每分钟240至260次心跳和每分钟16至28次呼吸。瞳孔和角膜反射仍然存在，体温维持在40.4摄氏度（104.7华氏度）。麻醉期间抑制率为0。插管后双谱指数立即为44，麻醉维持期间为44至57，拔管时为59。当鸢保持不动时，该指数升至85，这表明其在仰卧位时装死。一旦这只鸟直立栖息，它立即保持直立姿势，这证实了双谱指数值（85）与完全清醒的患者相对应。尽管行为或心肺变量保持不变，但双谱指数表明了催眠程度，这预示着这只鸟可能会突然苏醒。
