Optical coherence tomography angiography (OCTA) is a new and non-invasive imaging technique that is able to detect blood flow signal in the retina and the choroid within seconds. OCTA is different from the traditional angiography methods. The major advantages of OCTA are that it can observe blood flow signal in different layers of the retina and the choroid without injecting any dye, provide blood flow information that traditional angiography cannot provide, and enrich pathophysiological knowledge of the retinal and choroidal vascular diseases., which help us to make an accurate diagnosis and efficient evaluation of these diseases. However there is a large upgrade potential either on OCTA technique itself or on clinical application of OCTA. We need to fully understand the advantage and disadvantage, and differences of OCTA and traditional angiography. We also need to know how to interpret the result of OCTA. With that we could make a fast diagnosis in a non-invasive way and improve our knowledge of the retinal and choroidal vascular diseases.
As a new and non-invasive imaging technology, optical coherence tomography angiography (OCTA) has been using in ocular fundus diseases, glaucoma and neuro-ophthalmic disorders for more than 4 years. The most valuable and efficient application of OCTA is in detecting neovascular diseases in the macula. The big advantage of OCTA is for diagnosing all kinds of choroidal neovascularization. OCTA can observe blood flow information in different layers of the retina. To a large extent, it changes our diagnostic thinking and pathway in macular diseases. Before acquiring OCTA image, the operator should be well trained to ensure to get high quality images with good signal strength and less artifact. OCTA report should show the segmentation slab that the ophthalmologist wants to see. So far, OCTA has difficulty to reach peripheral retina with default setting. Even so, OCTA has provided much information of blood flow within retinal vascular arcade for evaluating structural and functional changes. We are expecting that the swept source OCTA could give us better observation of the choroidal blood flow. That should be the breakthrough of the new generation of OCTA.
OBJECTIVE: To review the role of thyroid hormone in the peripheral nerve regeneration. METHODS: The recent literatures of experimental study and clinical application on the role of thyroid hormone in nerve regeneration were reviewed. The researches on expression, isoform and changes of thyroid hormones in rat sciatic nerve in normal or injury were summarized. The effect of thyroid hormone on local rat sciatic nerve was studied, too. RESULTS: Nuclear thyroid hormone receptors expressed in numerous nuclei of sciatic nerve during a limited period of development extending from the third week of embryonic life to the end of the second postnatal week and after injury of adult sciatic nerve. A single and local administration of thyroid hormone at the level of the transected sciatic nerve produced a lasting effect on peripheral nerve regeneration. CONCLUSION: The beneficial effects of thyroid hormones upon injured peripheral nerve may have considerable therapeutic potential.
【摘要】 目的 了解外科围手术期预防性使用抗菌药物现状，评估其用药合理性。 方法 随机抽取2009年1-12月265例外科手术患者病历，根据《抗菌药物临床应用指导原则》和《卫生部办公厅关于抗菌药物临床应用管理有关问题的通知》对抗菌药物使用进行合理性评价。 结果 265例外科手术患者均使用了抗菌药物，使用率为100%，外科围手术期预防用抗菌药物不合理率为63.89%，存在的主要问题是用药指征过宽、起点过高、手术前预防用药时间不当、术后预防用药时间过长及盲目联合用药。 结论 外科围手术期抗菌药物预防性使用不合理现象突出，应积极开展合理使用抗菌药物培训，加强抗菌药物使用管理，规范围手术期抗菌药物的使用，从而提高外科围手术期抗菌药物使用合理性。【Abstract】 Objective To know the status of prophylactic use of antimicrobial agents in perioperative patients, and to evaluate the medication rationality. Methods The medical records of 265 patients who underwent the surgeries from January to December 2009 were randomly extracted, and the medication rationality was evaluated according to "Guiding Principles of Clinical Use of Antibiotics" and "Notice of Medical Department Office about Antibiotics Clinical practice Management Related Questions". Results All of the 265 perioperative patients were treated with antimicrobial drugs with a utilization rate of 100.00%, and the unreasonable rate of perioperative prophylactic use of antimicrobial agents was 63.89%. The main reasons included over-extended medication indications, high starting points, inappropriate time points of prophylactic medication, long duration of prophylactic medication and unreasonable drug combination. Conclusion The perioperative prophylactic use of antimicrobial agents is clinically unreasonable. It is necessary to carry out training on the rational use of antimicrobial agents to enhance the management of antimicrobial drug use and regulate the use of antimicrobial agents in perioperation.