Hemophilia arthropathy is a debilitating complication of hemophilia that occurs primarily in severe forms with recurrent spontaneous intra-articular hemorrhage, with the knee being the most commonly affected joint. Currently, total knee arthroplasty is the standard treatment for end-stage hemophilic arthropathy. Due to the special disease of hemophilia, general anesthesia is often chosen as the preferred anesthesia method, and the risk of bleeding is lower than that of neuraxial anesthesia. However, 20 to 30 percent of surgical patients suffer from post-operative nausea and vomiting after general anesthesia. Neutrophil to lymphocyte ratio and platelet to lymphocyte ratio have been suggested as parameters for the diagnosis and follow-up of inflammatory diseases, and inflammation has been found to increase the risk of PONV. However, for patients with hemophilia, no information is currently available on the relationship between the two. In this study, investigators intend to retrospectively analyze the clinical data of patients with hemophilia A in our hospital, explore the clinical value of preoperative NLR and PLR in predicting nausea and vomiting after TKA.
By comparing the incidence of PONV, the dosage of postoperative antiemetic drugs, the postoperative VAS score and the utilization rate of PCIA of hemophilia A patients in the NLR≥2 and NLR<2 groups, investigators could find out the high value in the diagnosis of hemophilia A, which is helpful to guide the clinical diagnosis and treatment of hemophilia A.