extraction hours. No significant difference of flavonoids content was observed among the different collecting time of C. morifolium. Conclusion The optimum extraction conditions were 75% ethanol, refluence for 1 5 h at 100 ℃ water bath for three times. The flavonoids would not be bound up with the harvest time.

Objective:To investigate the latent classes and influencing factors of vicarious posttraumatic growth among emergency nurses.Methods:Convenience sampling method was used to select the 498 emergency nurses of 20 public general hospitals in Anhui province as the survey objects. The general information questionnaire and Posttraumatic Growth Inventory were used to investigate. Latent class analysis was used to classify vicarious posttraumatic growth of emergency nurses, and the influencing factors of latent classes were analyzed by binary logistic regression.Results:There were two latent classes of vicarious posttraumatic growth of emergency nurses including high growth-high fluctuation group (24.1%, 120/498) and low growth group (75.9%, 378/498). Binary logistic regression analysis showed that professional title, average monthly income and self-rated health status were the factors influencing the latent classes (all P<0.05). Conclusions:There are obvious classification characteristics of vicarious posttraumatic growth among emergency nurses. Nursing managers should formulate and implement targeted intervention measures according to the classification characteristics and influencing factors to improve their vicarious posttraumatic growth level.

Objective: To explore the quality management of critical patients in the process of medical helicopter rescue and transshipment. Methods: After receiving the rescue and transshipment task for 10 critically ill patients, the Emergency Department quickly established the rescue quality management team under the direction of the dean: with helicopter on-site rescue and transshipment team, in-hospital pick-up and transshipment team, logistic support team and coordination command group; full medical security assessment: to prepare all emergency supplies, drugs, instruments and equipment in a predictable manner, and all within the effective period, completed. The success rate is 100%. The formulation of rescue plan: formulating individualized emergency plan, pre-examination and triage evaluation plan, transporting and implementing process plan; unblocked green channel: setting up rescue room as rescue preparation area; radiology department, laboratory department, pharmacy, B-ultrasound room, electrocardiogram room, emergency transfer elevator, medical housekeeper and other departments ensure the green channel unblocked, safety logistic support team dedicated personnel management. To manage the area from apron to emergency hall and rescue room, smooth transit routes, and prepare for emergency treatment in emergency intensive care unit and specialized intensive care unit. Specialized organizations are responsible for: Department directors, head nurses and quality control team leaders to organize and coordinate quality management work. Results: All 10 critically ill patients were safely and smoothly transported to hospital for emergency treatment without any adverse events. Six patients received emergency intensive care, three orthopaedic care, one hand-foot surgery care, and 10 critically ill patients were discharged from hospital in time and safely through various specialties. Conclusion The successful rescue and safe transshipment of 10 critically ill patients reflects the good beginning of the development of medical helicopter rescue in our province, and forms a complete, organized, targeted, planned and implemented team rescue system, which greatly improves the quality management level of medical helicopter rescue and transshipment.