动脉内溶栓治疗视网膜中央动脉阻塞的研究进展

视网膜中央动脉阻塞(CRAO)又称为眼卒中,常导致急性无痛性的视力丧失。CRAO的保守治疗措施有眼球按摩、降低眼压,使用血管扩张药物等,均在临床应用中收效甚微。随着动脉内溶栓(IAT)在急性缺血性脑卒中的治疗中展现出来积极的作用,IAT也逐渐被应用到CRAO的治疗中,并显示出一定的疗效。IAT是通过微导管将纤维蛋白溶解药物直接注入眼动脉,从而溶解阻塞视网膜中央动脉的栓子,以恢复视网膜的血流。从理论上讲,CRAO患者接受IAT治疗后应该具有与脑卒中治疗相同的良好效果,但目前各项临床研究的结果并不一致。本文总结了IAT治疗CRAO的可行性、有效性及安全性,并分析影响预后的相关因素,提出未来可能的发展方向,为IAT在CRAO治疗中的进一步临床应用提供依据。

Generating Proton Beams Exceeding 10 MeV Using High Contrast 60TW Laser

A prototype of a laser driven proton accelerator is built at Peking University. Protons exceeding IOMeV are accelerated from micrometer-thick aluminum targets irradiated by tightly focused laser pulse with 1.8 J energy and 30fs duration. The beam energy spectrum and charge distribution are measured by a Thomson parabola spectrometer and radiochromic fihn stacks. The sensitivity of proton cut-off energy to the focusing of the laser beam, the pulse duration, and the foil thickness are systematically investigated in the experiments. Stable proton beams have been produced with an optimized parameter set, providing a cornerstone for the future applications of laser accelerated protons.

Using ketamine in a patient with a near-occlusion tracheal tumor undergoing tracheal resection and reconstruction: A case report

BACKGROUND Tracheal tumors may cause airway obstruction and pose a significant risk to ventilation and oxygenation.Due to its rarity,there is currently no established protocol or guideline for anesthetic management of resection of upper tracheal tumors,therefore individualized strategies are necessary.There are limited number of reports regarding the anesthesthetic management of upper tracheal resection and reconstruction(TRR)in the literature.We successfully used intravenous ketamine to manage a patient with a near-occlusion upper tracheal tumor undergoing TRR.CASE SUMMARY A 25-year-old female reported progressive dyspnea and hemoptysis.Bronchoscopy showed an intratracheal tumor located one tracheal ring below the glottis,which occluded>90%of the tracheal lumen.The patient was scheduled for TRR.Considering the risk of complete airway collapse after the induction of general anesthesia,we decided to secure the airway with a tracheostomy with spontaneous breathing.The surgeons needed to transect the trachea 1-2 cartilage rings below and above the tumor borders:a time-consuming process.Coughing and movement needed be minimized;thus,we added intravenous ketamine to local anesthetic infiltration.After tracheostomy,an endotracheal tube was placed into the distal trachea,and general anesthesia was induced.The surgeons resected four cartilage rings with the tumor attached and anastomosed the posterior tracheal wall.We performed a video-laryngoscopy to place a new endotracheal tube.Finally,the surgeons anastomosed the anterior tracheal walls.The patient was extubated uneventfully.CONCLUSION Ketamine showed great advantages in the anesthesia of upper TRR by providing analgesia with minimal respiratory depression or airway collapse.

Impact of urbanization on morbidity of hepatitis A:a national panel study in China during 2005–2018

Background The effect of urbanization on the morbidity of hepatitis A remains unclear. We aimed to estimate the association between various urbanization-related indices and hepatitis A morbidity in China.Methods Data on the annual morbidity of hepatitis A, urbanization-related measures (i.e., gross domestic product per capita, the number of hospitalization beds per 1000 persons, illiteracy rate, tap water coverage, motor vehicles per 100 persons, population density, and the proportion of arable land), and meteorological factors in 31 provincial-level administrative divisions of Chinese mainland during 2005–2018 were collected from the National Population and Health Science Data Sharing Platform, China Statistical Yearbooks, and the China Meteorological Data Sharing Service System, respectively. Generalized linear mixed models were applied to quantify the impacts of different urbanization-related indices on the morbidity of hepatitis A in China after adjusting for covariates.Results A total of 537,466 hepatitis A cases were reported in China during 2005–2018. The annual morbidity had a decline of 79.4% from 5.64 cases to 1.16 cases per 100,000 people. There were obvious spatial variations with higher morbidity in western China. Nationally, gross domestic product per capita and the number of hospitalization beds per 1000 persons increased from 14,040 to 64,644 CNY and from 2.45 to 6.03 during 2005–2018, respectively. The illiteracy rate decreased from 11.0 to 4.9%. Gross domestic product per capita [relative risk (RR) = 0.96, 95% confidence interval (CI): 0.92–0.99], and the number of hospitalization beds per 1000 persons (RR = 0.79, 95%CI: 0.75–0.83) were associated with the declined morbidity of hepatitis A. By contrast, the increased morbidity of hepatitis A was linked to the illiteracy rate (RR = 1.04, 95%CI: 1.02–1.06). Similar influential factors were detected for children and adults, with greater effects witnessed for children.Conclusions People in the western region suffered the heaviest burden of hepatitis A in Chinese mainland. Nationally, there was a sharp decline in the morbidity of hepatitis A. The urbanization process was associated with the reduction of hepatitis A morbidity in China during 2005–2018.

Lipohypertrophy:prevalence,clinical consequence,and pathogenesis

Insulin treatment has many cutaneous alterations and skin-related adverse effect,lipohypertrophy(LH)is the commonest among them.[1]LH has the definition with a tumor-like lump,visible and touchable,adipose tissue at the site of insulin injection.[2]It might result from the lipogenic effect of repeated insulin exposure.[3,4]Injecting insulin into the tissue with LH weakens insulin physiological function,and leads to a resulting excess glucose exposure,glycemic modifiability,and an increased risk of hypoglycemia.[5]Unfortunately,there is limited information about the pathophysiology of LH in insulin users.As a result,reports of prevalence,clinical consequence,and pathogenesis are needed.