Objective To summarize the characteristics of the constitution of orthopedic diseases among soldiers in a sea area,so as to provide the reference for the rational allocation of medical resources,the prevention and treatment of orthopedic diseases,and the improvement of naval medical support.Methods Medical records on injuries of the outpatient and emergency departments in a hospital ship from February 2021 to April 2022 were retrospectively analyzed.The number of varying orthopedic diseases was counted,and descriptive statistical analysis was conducted.Results A total of 200 cases were included in the statistical analysis.The top five diseases were chronic low back pain,knee pain,tibial contusion,wrist joint injury,and shoulder joint injury,and they accounted for 82%of the total orthopedic diseases.Conclusion The medical team stationed on hospital ships should be guided by actual medical needs of officers and soldiers on island,enhance the diagnosis and treatment of common orthopedic diseases,formulate scientific and reasonable prevention and treatment strategies.The allocation of medical materials and personnel should be in line with the spectrum of orthopedic diseases as far as possible to reduce non-combat casualty and strengthen the combat effectiveness of the army.

Objective To study the effect and safety of dexmedetomidine on the intraoperative fentanyl requirements and cerebral hemodynamics in patients undergoing intracranial tumor surgery.Methods 62 patients scheduled for intracranial tumor surgery were selected and divided into observe group (31 cases) and control group(31 cases).Dexmedetomidine (0.5 μg/kg) was loaded in observe group,and followed by a continuous infusion of a rate of 1.0pμg · kg-1 · h-1 half an hour later.Saline was infused in the same time and the same way in control group.Dose of anesthetic and change of cerebral hemodynamics were recorded and compared.Results The mean heart rate and mean arterial blood pressure were lower in observe group than the underlying value when inducing anesthesia and during the operation (all P ＜ 0.05),while that happened after operation starting 60 minutes later in control group(all P ＜0.05).The mean heart rate and mean arterial blood pressure were lower in observe group those that in control group (all P ＜ 0.05).Dose of fentanyl and end-tidal sevoflurane concentration were lower in observe group(all P ＜ 0.05).Conclusion Dexmedetomidine used for cerebral hemodynamics stabiliby in intracranial tumor surgery has obvious curative effect and good safety.And it could decrease the dose of anesthetics and anesthesia adjuvant.