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From September to November 2019, three patients with Hornet stings were admitted to hospital with acute anaphylaxis and various degrees of organ dysfunction. After hemoperfusion combined with continuous hemodialysis and hormone pulse therapy, 1 patient was successfully treated and 2 patients were not cured. Bee Stings can cause systemic allergic reactions and toxic reactions. In severe cases, acute anaphylaxis, rhabdomyolysis, intravascular hemolysis, abnormal coagulation, and acute liver and kidney injury may occur, myocardial damage and other multi-organ function damage or even failure, is a clinical acute and critical illness, mortality is higher. Through the analysis of the diagnosis and treatment process of these 3 cases, the experience is summarized: the Bee sting should be treated as soon as possible, the early prevention and treatment of multiple organ dysfunction, the choice of accurate blood purification and comprehensive treatment, can effectively improve the prognosis, increase the success rate of treatment.2019年9月至11月，至医院先后就诊收治3例被马蜂群蜇伤的患者，入院时均表现为急性过敏性休克，并伴有不同程度器官功能损伤。经过血液灌流合并连续型血液透析治疗，以及激素冲击等内科综合治疗，最终1例患者救治成功，2例不愈出院。群蜂蜇伤可引起全身性过敏反应及毒性反应，严重者可出现急性过敏性休克、横纹肌溶解、血管内溶血、凝血功能异常、急性肝肾功能损伤、以及心肌损害等多器官功能受损甚至衰竭，是临床上的急危重症，死亡率较高。群蜂蜇伤应尽早就医，早期防治多脏器功能不全，选择准确的血液净化及综合治疗，可有效改善预后，增加救治成功率。.

To observe the effect of Ulinastatin (UTI) in the dynamic changes of aquaporin 4 (AQP4) and cyclooxygenase-2 (COX-2) in the brain tissue injury of acute hydrogen sulfide (H2S) intoxicated, to explore the Mechanism of brain tissue injury of acute H2S-intoxicated and the protection effect of UTI.A total of 96 SD rats of clean grade were divided randomly into four groups: normal control group (NS group, n=8) , UTI control group (UTI group, n=8) , H2S-intoxicated model group (H2S group, n=40) , UTI treatment group (H2S+UTI group, n=40). The H2S group and H2S+UTI group were exposed to H2S (284 mg/m(3)) by inhalation for 1 h, then H2S+UTI group was intraperitoneally exposed to UTI at the dose of 10(5) U/kg for 2 h, H2S group and H2S+UTI group were sacrificed at 2, 6, 12, 24 and 48 h after exposure, respectively. Remove the brain tissue, observe the rats behavioral changes at each time points. The mRNA expression of AQP4、COX-2 and NSE in the brain tissue were measured by RT-PCR method, and the protein expression of AQP4、COX-2 and NSE in the brain tissue were detected by immunohistochemical Streptavidin-perosidase method. Pathological changes of brain tissue were observed by lightmicroscope.1、Nerve cells in the H2S group rats had edema, degeneration, focal inflammatory cell infiltrate, capillary hyperplasia, expansion. Compared with NS group, the cerebral NSE mRNA and protein expression at each time point in H2S group after exposure were significantly increased (P0.01). 2、Compared with NS group, the cerebral AQP4 and COX-2 mRNA and protein expression at each time point in H2S group after exposure were significantly increased (P0.01). 3、The degree of brain damage was significantly decreased in H2S+UTI group than that in H2S group. Compared with H2S group, the cerebral NSE mRNA and protein expression at 6, 12, 24 and 48 h in H2S+UTI group after exposure were significantly decreased (P0.01) , no significantly difference at 2h (P0.05). 4、Compared with the H2S group, the cerebral AQP4 and COX-2 mRNA and protein expression at 6, 12, 24 and 48 h in H2S+UTI group after exposure were significantly decreased (P0.01) , slightly decreased at 2 h.The mechanism of brain injury of acute hydrogen sulfide intoxicated associated with abnormal expression of the cerebral AQP4, COX-2 levels. Intervention of UTI can reduce the cerebral AQP4 and COX-2 levels after hydrogen sulfide intoxicated, reduce the degree of brain injury.