Objective To evaluate the early effect of hypoxemia on central executive function of working memory.Methods 24 patients with obstructive sleep apnea syndrome (OSAS) and 20 healthy matching controls were studied in probe retrieval task.Results In control group,both the low and high conflict identification tasks elicited the N270 component with right prefrontal [F4,(2.2?2.7) ?V]and posterior [P3,(7.0?3.0) ?V; P4,(6.9 ? 3.1) ?V] distribution. N430 was elicited in high conflict condition with right hemispheric lateralization. The positive component,P300( 300～400 ms) distributed remarkably at parietal scalp[P3,(7.0?3.0) ?V; P4,(6.9?3.1) ?V]was elicited only in identity identification task. The N270 was significantly decreased in the frontal regions in mild OSAS patients [F4,(5.0 ? 4.5) ?V]; F3,(6.0?4.5) ?V] in comparison with the controls( P

Objectives To access the bacteriology in patients with sepsis due to biliary tract infection to provide a basis for empirical selection of proper antibiotic treatment.Methods This is a single-center retrospective study on 214 patients with biliary tract infection admitted from August 2014 to July 2016 to the surgical intensive care units (ICU) of The First Affiliated Hospital of Sun Yat-sen University.To study the demographic information,sequential organ failure assessment (SOFA),usage of antibiotics before ICU and duration of ICU were analyzed.Bile,peritoneal drainage and blood samples were collected.Results 47 septic shock patients and 25 septic patients due to biliary tract infection were enrolled in the trial.The two groups (the shock group vs.the sepsis group) had a significant difference in the duration of ICU stay [(6.4 ± 4.6) d vs.(2.3 ± 1.8) d,P ＜ 0.05].48 strains of pathogens were isolated from the bile samples.The major pathogens were Escherichia coli (E.coli) (n =23,47.9％),Enterococcus faecalis (n =8,16.7％) and Enterococcus faecium (n =2,4.2％).80 strains of pathogens were isolated from the peritoneal drainage culture samples.E.coli,pseudomonas aeruginosa,and Klebsiella pneumoniae ranked the top 3 species,accounting for 26.3％,11.3％ and 7.5％,respectively.The sensitivity of E.coli isolated from bile to amikacin,imipenem and panipenem were all over 90.0％.Conclusions E.coli was the principal gram-negative bacterium in biliary infection induced sepsis.Early administration of carbapenemes may reduce the occurrence of septic shock in these patients.

Objective To assess the efficacy and safety of dl-3-butylphthalide on the treatment of acute ischemic stroke. Methods A total of 197 patients who were in the period of 72 hours of first attack of ischemic stroke of internal carotid artery with NIHSS from 5 to 25 scores were enrolled in this multi-center, randomized, double-blind and aspirin-control study. Compound " Dan Shen" was used as a baseline therapy. Results Basical recovery plus significant improvement was seen in 74.7% of the patients in dl-3-butylphthalide group and 60.9% in aspirin group (CMH value 4.0,P=0.047);There was a significant improvement for dl-3-butylphthalide group regarding NIHSS total score, total score difference value and Barthel index on the day 11th and 21st after treatment compared with control group. The main adverse reaction of dl-3-butylphthalide was increased aminotransferase and mainly the slight increase of aspartate aminotransferase, by 4.34% and 0 respectively. Conclusion dl-3-butyiphthalide should be regarded as an effective and safe treatment for ischemic stroke and a treatment without severe side effects.

【Objective】 To observe the effect of deglycerolized red blood cells suspended in MAP on preservation and explore the most effective preservation method. 【Methods】 Concentrated red blood cells were prepared by centrifuging 400 mL of whole blood on the third day after collection. 40% compound glycerol solution was added using the ACP 215 automatic blood cell analyzer, and the resulting mixture was stored in an ultra-low temperature refrigerator at -65℃ for 30 days. After thawing and washing, it was equally separated into two bags. The control group received 0.9% sodium chloride solution, while the experimental group received MAP. Both groups were stored at 2-6℃. Hematological parameters, hemolysis indexes and cell metabolism indexes were measured on day 0, 1, 3, 5, 7 and 14 after storage. The quality changes of both groups were observed during the 14-day storage period. 【Results】 The quality of red blood cells in both groups was assessed through a panel of quality tests, including volume, hemoglobin content, free hemoglobin content, white blood cell residue, glycerin residue and sterility. These results met the Quality Requirements outlined in the "Quality Requirements of Whole Blood and Component Blood" (GB18469-2012), Hematocrit, red blood cell count, Hb recovery rate after washing and MCV meet the detection limit outlined in the "Expert Consensus on Quality Evaluation Indicators for Frozen Red Blood Cells", and the residual amount of platelets exceeds the detection limit(≤1%). There were no significant differences in RBC, Hct, MCV and hemoglobin between the two groups during the 14 day storage period. The level of free hemoglobin, hemolysis rate and K⁺ value increased in both groups over time. Significant differences in free hemoglobin were found on day 3, 5, 7 and 14 between the two groups(P<0.05). Hemolysis rate was significantly different on days 3, 5, 7 and 14, while K⁺ value was significantly different only on day 14(P<0.05). On day 14, the osmotic fragility of red blood cells was higher in the control group than in the experimental group(P<0.05); The ATP and pH values of both groups decreased as storage time increased, and significant differences in ATP and pH value were found on day 3, 5, 7 and on day 1, 3, 5, 7 and 14, respectively(P<0.05). 【Conclusion】 Deglycerolized red blood cells suspended in MAP additive solution can extend the storage period of blood to 7 days. This study provides a reference for the formulation of relevant standards.

【Objective】 To observe the effect of hydrogen peroxide atomization sterilizer using low concentration hydrogen peroxide disinfectant on the environment and object surface of physical examination area (hereinafter referred to as " physical examination area" ) in blood centers, so as to provide a simple method which is safe, efficient, easy to operate, harmless to human body and has no corrosive effect on equipment. 【Methods】 The physical examination area was disinfected with atomized hydrogen peroxide sterilizer, and the difference of colony number between air and surface before and after disinfection was compared to evaluate the disinfection effect. 【Results】 After disinfection, the hydrogen peroxide residue was detected for 25 times at 5 points, and the results were (0.7~1)ppm, with no statistical difference (P>0.05). 25 tests were carried out at 5 points, and the quartile of the test results was (0~2)CFU/ dish, and the qualified rate was 100%. The test results of bacteria before and after disinfection were statistically significant (P<0.05), which met the requirements of Class Ⅱ environment in Hygienic Standard for Hospital Disinfection(GB15982-2012). After disinfection, the quartile of surface colony detection results of workbench, blood donor seat, screen and door handle were (0~24.1)CFU/cm^2, (1.6~55.4)CFU/cm^2, (0~7.2)CFU/cm² and (0~4.8)CFU/cm^2, with the qualified rate at 80%, 48%, 100% and 100%, respectively, which were in accordance with the requirements of Class Ⅲenvironment in GB15982-2012. The number of colonies after disinfection at the above detection sites decreased significantly compared with that before disinfection (P<0.05). The surface contact plate pressing method and cotton swab smearing method were used to detect the number of colonies on the surface of sterilized work tables and blood donor seats, and the detection rate of the former was higher than that of the latter, with statistical significance (P<0.05). 【Conclusion】 After disinfection by hydrogen peroxide atomization sterilizer, the hydrogen peroxide residue met the requirements specified in the manual. The terminal disinfection effect of air in the physical examination area environment can meet the Class Ⅱ environmental requirements of GB15982-2012. However, the number of microorganisms on object surface after terminal disinfection was significantly lower than that before disinfection.

【Objective】 To investigate the environmental pollution of blood collection and supply institutions by using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) and evaluate its application value. 【Methods】 Colonies of air from blood donation sites, skin puncture sites of blood donors, platelet storage boxes, platelet collection equipment, object surfaces of related experimental consumables and cuff surfaces of staff after disinfection were collected, and typical colonies after cultivation were selected for microbial identification by microbial mass spectrometry and then compared with bacteria results detected in blood components from May 2017 to May 2021. 【Results】 Aseptic growth, the number of colonies ≤4.0 CFU/ dish, and the number of colonies > 4.0 CFU/dish accounted for 21.20%, 62.20% and 16.60%, respectively. The qualified rate from high to low was platelet storage box, bacteria settling in the air of blood donation room after disinfection, platelet collection equipment, skin puncture site of blood donors after disinfection, the surface of platelet consumables and the surface of medical staff's overalls. After disinfection, the blood donors' skin puncture sites were compared with other collection sites, and the t values were 2.0371, 1.508, 2.109, 1.961 and 1.778, respectively, with no significant difference (P>0.05). Thirty cases of bacterial contamination of blood components were detected from May 2017 to May 2021, among which the detection rate of apheresis platelets was the highest, and the t values were 1.731 and 2.272, relative to the contamination frequency of erythrocytes and plasma bacteria (P>0.05), while the t value was 2.875, relative to concentrated platelets, with significant difference (P<0.05). 【Conclusion】 Bacterial contamination of blood components mostly come from air bacteria settling, blood donors' arms and skin after disinfection, and surfaces of related equipment and materials. Therefore, it is of clinical significance to conduct strict disinfection of working sites, establish disinfection monitoring methods and formulate disinfection hygiene standards in blood stations.