Investigation on quality of disinfection in the SARS-CoV-2 nucleic acid sampling sites in Shanghai， 2022 / 上海预防医学

ObjectiveTo investigate the quality of disinfection in the SARS-CoV-2 nucleic acid sampling sites in Shanghai. MethodsSwab samples of medical staff’ hands and environments of different SARS-CoV-2 nucleic acid sampling sites were collected from July to September 2022， with the total number of bacterial colonies cultured and counted. ResultsA total of 728 swab samples were collected from 69 sampling sites. The median total number of bacterial colonies on hand surface， object surface and air samples were 0 CFU·cm-2， 0 CFU·cm-2， and1 CFU·（petri dish∙5 min）-1， respectively， and P95 was 13 CFU·cm-2， 5.3 CFU·cm-2， and 17.8 CFU·（culture vessel∙5 min）-1， respectively. According to the GB 15982‒2012 Hygienic Standard for Disinfection in Hospitals class Ⅳ environment， 680 samples met the standard （93.4%）. Furthermore， 96.9%， 92.0%， and 92.2% of the samples in the sampling sites of tertiary/secondary hospitals， community health centers， and community convenience sampling sites met the standard， respectively. Quality of disinfection did not differ significantly across these sampling sites. ConclusionThe quality of disinfection in the SARS-CoV-2 nucleic acid sampling sites in Shanghai is generally good. Additionally， hand hygiene of medical staff and disinfection on object surface in some sampling sites need to be strengthened.

Airway management of a series of patients with inhalation injury caused by smoke from smoke pot based on grade classification / 中华护理杂志

In this study,we summarized airway management of a series of patients with inhalation injury caused by smoke from smoke pot based on grade classification,which were:establishment of a special team for these classified patients,classifying the patients into four sub-groups including extremely severe,severe,moderate and mild,establishment of a program for trachea management and relevant measures on these classified sub-groups.Key points of management on extremely severe patients were as follows:protective isolation,mechanical ventilation,nursing of extracorporeal membrane oxygenation and pneumothorax and mediastinal emphysema,prevention of tracheo-esophgeal fistula,nursing cooperation of fiberoptic bronchoscopy.Key points of management on severe patients were as follows:disinfection and isolation,rational oxygen therapy,sputum elimination management,observation of illness status,preparation of emergency treatment,prevention and nursing of complications.Key points of management on moderate patients were as follows:ventilation,oxygen uptake,aerosol inhalation,sputum elimination guidance,respiratory function training.For mild patients,there was no special management except ventilation,aerosol inhalation and regular pulmonary function examination.One patient died due to multiple organ failure complicated with massive hemoptysis,four patients recovered with airway scar proliferation and lung fibrosis,and fifty-five patients fully recovered.

The use of sodium hyaluronate in cryopreservation of cornea / 解放军医学杂志

Objective To assess the effect of cryopreservation of cornea in glycerol,to analyze the protective effect of sodium hyaluronate on corneal endothelial cells(CEC) during preservation,and to find out a convenient and cheap method for the storage of cornea.Methods 20 rabbit corneas were divided into two groups randomly.The corneas of control group were stored directly in pure glycerol at-25℃,while in the experimental group sodium hyaluronate was evenly anointed on the corneal endothelial surface of the cornea before being cryopreserved in glycerol.2 months later,the effect of preservation for both groups was examined with trypan blue combined with alizarin red staining(viability staining) for corneal endothelial cells,electron-microscope examination for preserved corneas,and rabbit experimental penetrating keratoplasty(PKP) with the long-term cryopreserved corneas from both the experimental and control groups.Results CEC viability could be preserved by both methods.CEC trypan blue combined with alizarin red staining(viability staining) showed that the CEC density of cornea in the experimental group was 3 067.9?127.6/mm2,which was higher than that of control group(2 899.9?134.0/mm2).The mortality of CEC in experimental group was 4.2%?3.4%,lower than that in control group(13.8%?2.2%).Suceessful rate of PKP was higher in the experimental group with higher CEC density.Conclusion Cryopreservation with glycerol can preserve the viability of CEC.Sodium hyaluronate can reduce the damage to endothelium in the preserving procedure and can obviously improve the effect of preservation.The improved cryopreservation of cornea with glycerol may be a convenient,economic and effective method for eyebank.